im planning a RB20DET or RB25DET for my E30, so just wondering if its that much bigger than the original bimmer engine in it?. i was thinking also about the SR20DET it would slide right it but id rather go for a 6 than a 4 :)

give me your opions :buttrock

Evan.

Pffft.... the RB20DET is a piece of shit and doesnt make any more power than the SR with a TON less aftermarket support. Plus it weighs more.

yea but u got 2 more cylinders with a RB anddd a RB25DET makes 210hp STOCK not 150 like the SR20det

There a few RB threads on here so do a search. The RB probably fits better than an M50 cuz its more compact just don't waste your time with an RB20, it's cheap for a reason cuz no one wants it. Any 2.0L 6 is useless in my book. Not enough power for the weight etc.

im planning a Rb25DET anyways =D

yea but u got 2 more cylinders with a RB anddd a RB25DET makes 210hp STOCK not 150 like the SR20det

LOL WUT

The lowest powered SR20DET made 205 BHP - S15 engines made ~250 BHP.


RB25DETs are cool, seems like they can stand about 400 rwhp pretty easily and sound badass. It'd be very easy to tune it with the widespread availability of things like a PowerFC etc. Not sure what the stock turbo can do, but it uses a T3 flange so if you wanted a pretty cheap 400-450rwhp setup you could put a T3/T04E on it for ~$600 USD.


I think it all comes down to how cheaply you can get an RB25 vs. an M50.

If you want to drop some weight from the car, an SR20DET will weigh WAY less than either of those. Won't have the down low torque, but mine is making around 350 rwhp with the stock exhaust manifold, so it's not that difficult or expensive to get up to that power level or a little beyond. Once you cross 450 rwhp that's when I'd be wary of using a stock short block... even though I've seen 660 rwhp on a bone stock engine with a new headgasket and cams.

lol sounds like a lot of HP , a E30 with a RB25DET should go like a rat with a rocket taped on its back LOLLL but would a RB25DET even fit in a E30? lenght wise not sure..

i can get a RB25DET for $3000 AUD half cut, with loom, tranny and ECU!

lol sounds like a lot of HP , a E30 with a RB25DET should go like a rat with a rocket taped on its back LOLLL but would a RB25DET even fit in a E30? lenght wise not sure..

i can get a RB25DET for $3000 AUD half cut, with loom, tranny and ECU!

Yes. You can fit any straight 6 into an E30 with some effort.

Yes. You can fit any straight 6 into an E30 with some effort.


um what you mean with some effort?, custome radiator & fans?

Don't forget that the BMW engines are rolled over to the right for hood clearance. I doubt that the japanese 6-cyl's are any shorter; probably about the same length.

Pffft.... the RB20DET is a piece of shit and doesnt make any more power than the SR with a TON less aftermarket support. Plus it weighs more.
Plus it DOES make more power than the S13 SR20DET, plus it is very cheap, plus it revs really, really high, plus it sounds waaaaay better than the SR, plus it can hold more boost, plus it has 2 more cylinders, plus it can put down 300 rwhp with nothing more than a turbo and IC upgrade (no tuning or injectors), plus, plus, plus.... the reasons for your bias exist only in your head.

If you're obsessed with a straight six, go for an rb25. the rb20 is not an ideal engine.

but in terms of everything else, an sr20 is going to be a better idea.

An "ideal engine?" Get a clue. If you guys want to give your opinion, it would help if you could provide some facts, rather than saying, "RB20 is a piece of @!@#$" or "rb20 is not an ideal engine." Or did you not know it was just your opinion?

Or.... are you just repeating what you read on some other forum?

If you feel compelled to post, please try to provide content rather than rumor.

While it could be cool to have the engine upright, projecting out of the hood like a street rod with a big blower, a swap of one of the japanese 6-cyls will require:

Custom, front-sump oil pan and pickup tube so that the engine can be rolled over 20 degs or so to the right (pass side)

Possible re-work so that oil pumped to the head will drain back to the sump: what if the head drain passages are on the left (driver) side of the engine???

You guys need to look a little more carefully and in-depth before you speculate on whats possible. Make a mock-up with a blown engine, for example. Too bad foamie mock-up engines are not available.

An "ideal engine?" Get a clue. If you guys want to give your opinion, it would help if you could provide some facts, rather than saying, "RB20 is a piece of @!@#$" or "rb20 is not an ideal engine." Or did you not know it was just your opinion?

Or.... are you just repeating what you read on some other forum?

If you feel compelled to post, please try to provide content rather than rumor.

I'm a nissan guy. I've owned three 240sx's worked on every single RB series engine, and currently own an SR20 with over 550hp.

The RB20DET is a twin cam, fuel injected, single turbocharged engine commonly placed in the base model nissan skyline.

It was never offered in 4wd versions like the RB26 or occasionally on the RB25.

The RB20 engine is an iron block, making it quite heavy, and due to it's small displacement, high weight, and the fact that there were better options available in terms of power and weight (RB25, 26, 2JZ) it never really developed an aftermarket. Prices for the engines are low, but you get what you pay for. They're reliable and chain driven, but not much else.


The RB25, on the other hand, is one of the best japanese engines ever built, next to the JZ, rb26, and SR20DET engines. It's got a large aftermarket following and parts are readily available. It was produced longer, making it readily available, and not much more expensive. It is still a heavy engine, using the same cast iron block. If you're dead set on a straight six, this would be the "ideal" option. an RB26 is an even better motor, but they are somewhat rare, and people tend to keep them in skyline GTR's.

If you want the "best" route in terms of price, aftermarket, availability, and power/dollar, get your ass an S13 SR20DET. While it does not have the variable valve timing of the s14 and 15 engines (you can tell an s13 from a 14 or 15 by the lack of a rounded "bump" at the front of the valve cover) the loss in power is so irrelevant, tuners just don't care. Other differences across the 13,14, and 15 lines include turbocharger changes. the 13 has a smaller, t25 turbo capable of producing about 240rwhp. the 14 has a small t28 capable of about 270, the s15 has a larger ball bearing t28 (as opposed to the liquid oil bearings in the previous model's) and is good for ~325-340. the 5 speed transmission on the s13 and s14 engines are unkillable, while you need to look out for 3rd and 5th gear synchro problems in the rb25 gearbox. the 6 speed in an s15, while solid in stock form, has a reputation for not liking power in excess of 500whp. most tuners simply throw it out and put in an older 5 speed.

The sr20DET was available most notably in the nissan silvia (200sx in austrailia) and in the 180sx from 1989-1993 (hatchback s13) as a redtop (red valve cover) in the silvia and blacktop (black valve cover) in the 180sx. No difference between the engines.

There was a rare silvertop engine, with no discernable difference that I can remember, in the avenir

It was in the bluebird, avenir, pulsar, 200sx, 180sx, liberty, r'nessa, and the sunny.

in the s14 silvia (1995-1998) you got the VVT. in the s15 silvia (not sold in america) you got the s15.



The engine was available for so long, in such great numbers (the sales figures for the silvia and 180sx were staggering) that there is a huge supply of these engines, and massive aftermarket support. being an aluminum block, it's shorter, lighter, and moves the center of gravity closer towards the center of the car. better handling and better power/weight is the result.


There is arguably no aftermarket for engines greater than that for the sr20DET.






There, did I prove to you that I'm not just some moron?



Possible re-work so that oil pumped to the head will drain back to the sump: what if the head drain passages are on the left (driver) side of the engine???


drain passages are on the passenger side.

Plus it DOES make more power than the S13 SR20DET, plus it is very cheap, plus it revs really, really high, plus it sounds waaaaay better than the SR, plus it can hold more boost, plus it has 2 more cylinders, plus it can put down 300 rwhp with nothing more than a turbo and IC upgrade (no tuning or injectors), plus, plus, plus.... the reasons for your bias exist only in your head.
The RB20 has fan boys? ... whoa.

You are arguing some really minute crap.

Truth be told to the OP the RB20 isn't bad, but if you are going to mess with a 2.0L motor you might as well stick with an SR and save the weight (~150 lbs.). If you are going to take the handling hit you might as well get a 2.5L motor like the M50, 1JZ, or RB25 and go that route.

You guys are all smoking crack --- you don't even know if its possible or how to swap one into an e30 --- so your discussion is pointless ---

You guys are all smoking crack --- you don't even know if its possible or how to swap one into an e30 --- so your discussion is pointless ---

anything is possible with enough time and/or money.


It would be a wierd ass swap for sure, and probably not worth the money.

You guys are all smoking crack --- you don't even know if its possible or how to swap one into an e30 --- so your discussion is pointless ---

You don't either, so what's your point?

Ls1 is a much smarter and more practical way to go ;)

[lots of good info here]
That's much better. But I disagree with the SR20 being the cheapest route. If you add up all of the costs to do the swaps vs KA turbo, the RB20 comes in at the bottom simply because a decent clip can be had for $1500, which is much cheaper than a decent S13 clip.

The RB20 has fan boys? ... whoa.

You are arguing some really minute crap.

Truth be told to the OP the RB20 isn't bad, but if you are going to mess with a 2.0L motor you might as well stick with an SR and save the weight (~150 lbs.). If you are going to take the handling hit you might as well get a 2.5L motor like the M50, 1JZ, or RB25 and go that route.
Except that the OP wants an I6, not an I4. The SR20 sounds like crap and is not as smooth as a six, and there's not much that can be done about that.

Now I know you're just repeating internet rumor. The handling hit rumor was debunked years ago, but SR fanboys still spread it to make themselves feel better? Since you seem to have missed that point, I'll explain it to you: the RB's sit very close to the firewall, which offsets the weight gain on the front end, bringing the overall distribution close to stock. Check it out on NICO.

Going along with your reasoning, I could say that if you're going to take the handling hit, you may as well put a V12 in there. Well yes, except... that would cost quite a bit. Cost is a major factor for most people. Don't ignore it.

And no, I'm no RB20 fanboy, but I can't stand hearing the SR crap where people think a good aftermarket and 12341136098125 psi of boost will ever make up for 2.0 L of displacement. If you think the decision of what engine to put into a car is clear-cut, then I think you're just under-informed. There are pros and cons for every engine, and it would be better if you would state what you KNOW rather than what you have HEARD.

My own opinion is that there are no significant advantages to swapping a Nissan RB series engine into the E36 since it is so much easier to get a BMW six and bolt it right in. They are plentiful and cheap, and there is a thriving FI forum here to help you get it turbo'd.

If I had the money, I'd do an LS1 or just build a nitrous plant in my backyard and run with a 200 shot on the M52.

Hey FATE30, seeing that your from Australia its way cheaper to go RB than M50 so I understand where your coming from but as you can see from this thriving overly informative thread that no one has done this swap yet so it looks like your on your own dude. I hope you go through with it cuz it does sound like a cool idea...

Except that the OP wants an I6, not an I4. The SR20 sounds like crap and is not as smooth as a six, and there's not much that can be done about that.

The SR doesn't sound like crap, besides that is subjective.


Now I know you're just repeating internet rumor. The handling hit rumor was debunked years ago, but SR fanboys still spread it to make themselves feel better? Since you seem to have missed that point, I'll explain it to you: the RB's sit very close to the firewall, which offsets the weight gain on the front end, bringing the overall distribution close to stock. Check it out on NICO.

I was a moderator on NICO, and I know for a fact that the RB does affect the handling balance of the car. You think 100+ lbs. of frontal weight just magically disappears? It affects the roll center and the dynamic weight transfer, two things that are VERY key on a McStrut front suspension.

The SR sits less than an inch from the firewall, just like the KA, CA, and RB. However the placement of the engine itself has a very minute change in the distribution of weight in the car. Fact is, 100 lbs. in a 240SX, or E30, is about 4% of the weight in the car. So a 52:48 OEM goes to a 56:44 Modified. I've cornerweighted a number of 240SXs, and the SR engine actually makes the chassis balance out since it is a little lighter than the KA24DE.


Going along with your reasoning, I could say that if you're going to take the handling hit, you may as well put a V12 in there. Well yes, except... that would cost quite a bit. Cost is a major factor for most people. Don't ignore it.

If cost was a factor then he shouldn't be looking into motor swaps. Seriously, installing a Nissan engine into a BMW is not a cheap affair. It has costs well beyond the cost of the motor itself.


And no, I'm no RB20 fanboy, but I can't stand hearing the SR crap where people think a good aftermarket and 12341136098125 psi of boost will ever make up for 2.0 L of displacement. If you think the decision of what engine to put into a car is clear-cut, then I think you're just under-informed. There are pros and cons for every engine, and it would be better if you would state what you KNOW rather than what you have HEARD.


I know more about the 240SX and Nissan engines than just about anyone on this forum. The only person that is on par with me is Jacob (Def) because he too owns them. I've worked in the aftermarket well before the huge drift craze with numerous 240SX / 200SX setups.

What I'm talking about is what I know. The SR is significantly lighter, makes similar power output, is just as cost effective, has a SIGNIFICANTLY larger and more available aftermarket, and it will improve the dynamic chassis performance over a heavier I6.

I've seen SR's make 600whp on 18 lbs. of boost. It's all in how you build them. Most people stick to running them stock and forcing air through them rather than actually developing the motor.


My own opinion is that there are no significant advantages to swapping a Nissan RB series engine into the E36 since it is so much easier to get a BMW six and bolt it right in. They are plentiful and cheap, and there is a thriving FI forum here to help you get it turbo'd.

If I had the money, I'd do an LS1 or just build a nitrous plant in my backyard and run with a 200 shot on the M52.

All logical ideas.

OK so the question is then, how much heavier is an RB or M50 than an M20, which is what an E30 was designed for right. Anyone know what the weight distribution of an M20 equipped E30 is...A buddy of mine did an RB25DET swap on his S14 and it definitely changed the handling characteristics of the car and he's got the whole TIEN coilover set up on there, corner weighted and all. The car handles great but he could definitely feel the extra 100lbs in the front end.

The SR doesn't sound like crap, besides that is subjective.

I was a moderator on NICO, and I know for a fact that the RB does affect the handling balance of the car. You think 100+ lbs. of frontal weight just magically disappears? It affects the roll center and the dynamic weight transfer, two things that are VERY key on a McStrut front suspension.

The SR sits less than an inch from the firewall, just like the KA, CA, and RB. However the placement of the engine itself has a very minute change in the distribution of weight in the car. Fact is, 100 lbs. in a 240SX, or E30, is about 4% of the weight in the car. So a 52:48 OEM goes to a 56:44 Modified. I've cornerweighted a number of 240SXs, and the SR engine actually makes the chassis balance out since it is a little lighter than the KA24DE.

This whole thread is about a subjective question, is it not? I wouldn't claim that there is nobody on earth that prefers the sound of the SR over any RB, but there can't be very many people in that category.

But no, an extra 100 lbs of engine does not equate to 56:44, and that's not subjective. And no, the SR, KA, and RB do not sit in the same places. If you were truly a moderator on NICO, then you can check my shifter thread (with pics) as well as plenty of other threads to see that clearly. At any rate, the only way to get close to 56:44 is to put 100 lbs right between the front wheels, which as you must know, is not where the engine's CG is located. And to further nail the lid on the coffin, quite a bit of that 100 lbs you are talking about is located in the RB's tranny, which is even farther from the front wheels.

I know more about the 240SX and Nissan engines than just about anyone on this forum. The only person that is on par with me is Jacob (Def) because he too owns them. I've worked in the aftermarket well before the huge drift craze with numerous 240SX / 200SX setups.
Ok, well since you are the self-proclaimed 240SX guru, now I'll believe anything you say -- despite the fact that I've done both S13 and S14 swaps all by myself and without my Mom's help.:rolleyes

Our point is: why don't you figure out how doable your ideas of grandeur are before wasting the time writing essays about how "totally awesome" your beloved japanese motors are.

If you think it would be cool to do...then do it!

Rather

Right now it seems that you guys are just having fun who can portray themselves as the biggest fanboy in a stupid hypothetical pissing match.

RB is going to cost you more in the end, tuning capabilities way less than the SR. SR has a larger aftermarket and weighs less. My roommate is putting down 295 HP and 307 torque to the wheels with a FMIC and a Power FC on the stock turbo.

Nice avatar :buttrock

Our point is: why don't you figure out how doable your ideas of grandeur are before wasting the time writing essays about how "totally awesome" your beloved japanese motors are.

If you think it would be cool to do...then do it!

Rather

Right now it seems that you guys are just having fun who can portray themselves as the biggest fanboy in a stupid hypothetical pissing match.

I've seen both an RB and an SR in an E30 - so it's very possible. They're both front sump, so no big difficulties there.


As for RB20 vs. SR20 - the SR can hold more power on the stock bottom end - period. It's been proven time and time again. Tuning for either engine is trivial since the stock ECU will support upwards of 550 rwhp with less than $100 of hardware to tune it(total initial cost).

RBs are heavy engines compared to an SR20, but an RB25 might be worth it if you're more interested in drag racing. I can feel the difference between an SR and a KA being up front in an S13, so an RB only makes it worse(longer block, iron and relatively big).

stop being a sissy n go for the rb26
http://www.zilvia.net/f/showthread.php?t=128515

But no, an extra 100 lbs of engine does not equate to 56:44, and that's not subjective. And no, the SR, KA, and RB do not sit in the same places. If you were truly a moderator on NICO, then you can check my shifter thread (with pics) as well as plenty of other threads to see that clearly. At any rate, the only way to get close to 56:44 is to put 100 lbs right between the front wheels, which as you must know, is not where the engine's CG is located. And to further nail the lid on the coffin, quite a bit of that 100 lbs you are talking about is located in the RB's tranny, which is even farther from the front wheels.

Ok, well since you are the self-proclaimed 240SX guru, now I'll believe anything you say -- despite the fact that I've done both S13 and S14 swaps all by myself and without my Mom's help.:rolleyes

LOL, I'm not even going to bother responding to this level of ignorance. It's most of the reason why I got away from the 240SX community. It's full of kids that think they know what they are talking about.

If you can't even acknowledge the obvious dynamic shortcomings of 100+ lbs. of frontal weight then you aren't going to understand my argument anyways. I'll just save my time.

For a laugh I'll leave you with this:

http://forums.nicoclub.com/zerofile/18134/engine.jpg

vs.

http://www.turbokits.com/images/pb_sr20_turbo_upgrade.jpg

Our point is: why don't you figure out how doable your ideas of grandeur are before wasting the time writing essays about how "totally awesome" your beloved japanese motors are.

It's not my problem.

see having a highly stressed 22pis sr20 is not any better than a stock RB25DET, fitting the Rb's is my question and its been done RB25DET and SR20DET,

pfttt i mite aswell get a E36 and put a Mild RB25DET, beat mucking around with a E30. BUTTTTT E30 is $1500 - $4000 for one in good shape as in a E36 is 8000 and needs work. thats why i was think a E30....

anyways would you go for a RB25DET or SR20DET?

Why don't you just buy a 325is E36 and turbo it.

Why don't you just buy a 325is E36 and turbo it.

Why dont i put a engine in it that was factory turbocharged? (yea cheaper)

It's full of kids that think they know what they are talking about.
The "Mom" comment was sarcasm directed at you. To make a comment like this:
I know more about the 240SX and Nissan engines than just about anyone on this forum.
... you'd have to be pretty young or just very small minded. So I was giving you the benefit of the doubt.

On the other hand, I have 3 kids of my own.

Let's stop the rhetoric right now. Post up the corner weights on the cars you've done. Surely someone took pics of this important event, right? Put 'em up here and I'll shut up. And tell me your logon for NICO so I can go see how much of a contributor you were to the RB forum, because I'm going to guess that you rarely ventured into the RB forum.

Why dont i put a engine in it that was factory turbocharged? (yea cheaper)
Why would you not do RB26 over RB25? My guess is that either engine is going to give you problems with downpipe clearance at the steering column, so why not just go RB26 in the first place? It's got better internals and a superb intake manifold. In fact, the under-hood clearance should be a bit better due to the intake manifold.

Btw, FATE30, as far as I know, only myself and one other forum member here (Goofynick) have actually done an RB swap into a 240SX. If you get that far, I could probably help you out with some of the details. I had everything but cruise working (need a Cefiro TB for that), and I have published a complete wiring guide and measurements as to the overall length of the various engines/tranny combinations so you'll know where everything is going to line up on the E30. All of that info is on the NICO RB forum under the same username. Goofynick also had the same username, and he had a very respectable budget setup that was hitting in the 400 rwhp range, iirc, with some minor upgrades and tuning. Also, as Def alluded to, tuning a Nissan is dirt cheap. All of the software tools are free, as are the definition files, some tested-tried tunes, etc.

As far as the SR/RB debate, well, it's not really appropriate here, and I regret getting into it. I'm sure you've got some idea of whether putting an iron block inline 6 into an E30 that already had an iron block inline 6 is going to upset the weight distribution. It's a moot point, I think, otherwise we'd all be driving ultra-high-boost turbocharged 318's.

Unfortunately (or fortunately, depending on how you look at it), nobody on this forum appears to have done this swap into an E30, so you'll be on your own on the mechanical side of things.

stop being a sissy n go for the rb26
http://www.zilvia.net/f/showthread.php?t=128515

Those guys are awesome. Saw that a while ago (this is Garret, not Steve)...

This thread makes me lol :clap

Those guys are awesome. Saw that a while ago (this is Garret, not Steve)...

This thread makes me lol :clap

what do you plan on doing with the body of your car?

... you'd have to be pretty young or just very small minded. So I was giving you the benefit of the doubt.

Let's stop the rhetoric right now. Post up the corner weights on the cars you've done. Surely someone took pics of this important event, right? Put 'em up here and I'll shut up. And tell me your logon for NICO so I can go see how much of a contributor you were to the RB forum, because I'm going to guess that you rarely ventured into the RB forum.

Nismo_Freak is my name on NICO, I was there for 6 years and have over 11000 posts.

Why would I take pictures of cornerweighting a car? It's not exactly a picturesque moment.

My S14 weighed 2294 lbs. when I did the cornerweight, before I put in the Kirk Racing setup. That's on the typical Longacre scales. KA's usually favored the front a bit by about 2 -3%, also depending on how much the corners varied on the installed height. I did an S14 with an RB25 and it required noticeably more adjustment. Figured it might have been the install (since most 240 owners dump the car) until I did an S13 with an RB25. It was even worse.

Vklosak on NICO knows me, so does WDRacing, AZHitman, EZCheese, and just about all the other old people. You can ask them what I know. Most of what I know comes from experience with the cars, and understanding theory. I work in structural engineering so I'm well aware of load distribution and how it is transfered. My arrogance comes from having to constantly argue with people over stuff they broadly generalize, if you post on NICO then you should understand this.

I think you are intelligent, but that you are missing an understanding about chassis dynamics. You should pick up a copy of Race Car Vehicle Dynamics from Milliken and read up on some of it. There are other sources out there as well that are ASE material.

Oh and if you are into road racing look up Nissan Road Racing Forum.

Ok, well since you are the self-proclaimed 240SX guru, now I'll believe anything you say -- despite the fact that I've done both S13 and S14 swaps all by myself and without my Mom's help.:rolleyes

:smash I don't know anything about 240sx's or sr20's.

http://i26.photobucket.com/albums/c101/popnsplat/funny%201/P1000213.jpg?t=1214152670

http://i26.photobucket.com/albums/c101/popnsplat/funny%201/P1000617.jpg?t=1214152695

http://i26.photobucket.com/albums/c101/popnsplat/funny%201/15bdd2b5.jpg?t=1214152743

I love how this thread has turned into a pissin contest of who knows more than who. As the man says, "speak softly and carry a big stick"

anything is possible with enough time and/or money.


It would be a wierd ass swap for sure, and probably not worth the money.

Whats the point when you can drop an M50/S50 in and make comparable power in stock trim on the motor, with 98% less headaches....or if you want to go big dog style go with a S38 motor :buttrock 3.5-3.6L of pure fury :evil2

stop being a sissy n go for the rb26




How did this happen in my backyard and me not know about it?

Why is it I've never seen the Elise around?!

:smash I don't know anything about 240sx's or sr20's.


http://i26.photobucket.com/albums/c101/popnsplat/funny%201/15bdd2b5.jpg?t=1214152743

This thread has gone off in a major tangent...so I'll keep it going. :lol Everyone and their momma knows how to do an sr swap in an s-chasis these days :lol:lol ...but I still like how yours turned out:). Any true Nissan enthusiast I consider part of the family....so here's mine and staying true to the thread "going off in the wrong direction" LOL.

-Jon

Sorry old pics:
http://i148.photobucket.com/albums/s19/bumpercar240z/NASAseasonopenerCaliSpdwy2.jpg
http://i148.photobucket.com/albums/s19/bumpercar240z/061014nasa_pgb_momentumgt022.jpg

Heres a good informative thread comparing the RB series engines.

http://forums.nicoclub.com/zerothread/135400

and another

http://forums.hybridz.org/showthread.php?t=128085

Why would you not do RB26 over RB25? My guess is that either engine is going to give you problems with downpipe clearance at the steering column, so why not just go RB26 in the first place? It's got better internals and a superb intake manifold. In fact, the under-hood clearance should be a bit better due to the intake manifold.

heres the good thing about having RHD cars in Australia, steering column on the right, nissan engines have the exsaust manifold on the LEFT!!!!!:alright

so ill have no problems wat so ever with column clearence as its on the OTHERSIDE OF THE ENGINE :buttrock

so without all the BULL$hit has a RB25det been done in a E30? cause a RB20DET has been? and would sooo fun to drive , lucky they dont have traction control cause ill be SICK OF IT FLASHING :P:P:P:P

LOUD NOISES!!!! My nissan engine knowledge penis is bigger than any of yours. I know so much, that it would make your head explode if I even started to write about it, so I am not going to. But perhaps one of you lesser peons who think they know so much about Nissans could actually answer the OPs question...I think he was asking about size differences (as in dimensions of the engine)