M60B40 Bore kit?

[Lastb0isct]

I've been doing a little research on doing the swap from the M60B30 to M60B40 and am curious if there's bore kit out there for the M60B40? I want to get as much out of it as i can and with a bore kit and lower compression i think that it'd be even easier to supercharge, am i right? Or would i see a more reliable/beneficial way in going with a bore + stroke? Is there any easy way to bore out my M60B30? Just seeing if there's any other cool stuff i can do out there, but keep in mind that im not a millionaire(yet) so i'd try and keep it under 5k(excluding engine purchase and supercharger).

[Goat128]

If you buy the engine from bavengine you can order the performance upgrade wich has pistons, sleeves, and p&p. There was a recent post about this he said performance was worse in lower rpm but much better in upper rpm, due to software.

[Lastb0isct]

hmmm, i kinda want a lot of low end grunt, so maybe a supercharger is better? would the ESS supercharger give me a bit more grunt at sub 2k rpms in my M60B30?

[Goat128]

That's a good question... I'm pretty sure that kit is not smog legal in CA, but that's not necessarily the end of the line... that kit is quoted as 328 hp and 412 nm of torque (convert to lb-ft??) My guess is a supercharger would give more low end then for instance a 6cyl-turbo because turbos take more time to spool up whereas a supercharger is belt driven. Maybe what you need though is a differential swap.. you can use the differential from the 535 it has a higher gear ratio and will give you quicker off the line starts then the stock 530 differential. Also there was a thread not too long ago about a 4.0 swap from a 3.0. You can pretty much swap m60s without too much difficulty but don't try and swap in an m62 - much too hard.

The other option is if you do go with the bavengine, you could try and find someone to custom tune it and burn a chip, but I doubt that comes cheap.

[xatlas0]

hmmm, i kinda want a lot of low end grunt, so maybe a supercharger is better? would the ESS supercharger give me a bit more grunt at sub 2k rpms in my M60B30?

The M60B30 and M60B40 have different bores and strokes. In order to convert the M60B30 motor into a M60B40 equivalent, you would need a machine shop to bore out the block, then re-sleeve it with Ausil piston linings. That usually runs about 1-3k alone, then you'd need to buy pistons and a crank, as well as a M60B40 ECU and trans, as the B40 will kill an auto, if that is what you have.

Honestly, it would simply be cheaper to buy a M60B40 with the ECU from BavEngine or some comprable place. It should be about 1-2k shipped, and possibly another 300 or so for the ECU. Trans could be bought from the same place, and some are on Ebay for less than 1k. Any M6x or M7x transmission will bolt up to the motor.

All superchargers currently available for the M6x motors are centri type, meaning they only reach max boost at redline, giving virtually no gains below (for this motor) 3k RPMs. Above that, the boost has built enough to provide some effect. (>30rwhp)

[Goat128]

Let me know if you do this I'm in the LA area, too, and wouldn't mind watching some of this or helping out.

[Lastb0isct]

yea, im definately looking to do something within the next year. Im just debating on what to do. So xatlas you think that i won't see any difference in the low end on my 530 with a supercharger? Would it even be worth it to supercharge an M60B30 that has 120k on the clock, or would that be like a grenade? If i had a couple people helping me how long would it take for the swap? Im thinking about doing the swap and need to price it out and get real figures because i can't seem to find the engine for that much. Don't i also need a new drivetrain?

[xatlas0]

yea, im definately looking to do something within the next year. Im just debating on what to do. So xatlas you think that i won't see any difference in the low end on my 530 with a supercharger? Would it even be worth it to supercharge an M60B30 that has 120k on the clock, or would that be like a grenade? If i had a couple people helping me how long would it take for the swap? Im thinking about doing the swap and need to price it out and get real figures because i can't seem to find the engine for that much. Don't i also need a new drivetrain?

There have been several threads about the M60B30 to M60B40 swap in the last few months, take a look for them.

A centri-type charger is essentially a belt driven turbo. Thusly, it builds boost in a linear fashion based on engine RPMs. Therefore, at low RPMs, it makes virtually no (<2psi) boost, the area you are looking for more performance in. Up top, it makes full boost, giving the best power output. The other two kinds of superchargers, roots and twin-screw give far better low RPM performance. Unfortunately, nobody makes kits that use those chargers for the M60.

If you pick up a used M60B40 (that has had at least a compression and leakdown test) The only thing you will physically need to start the car is a M60B40 DME. In terms of making the car drive properly, you will also need the right transmission. If your 530 is an auto, then a manual swap is advised, as then would be the time to do it. I made a thread around the beginning of the year which had a detailed parts list required for the auto->manual swap in an e34, look for it.

The actual swap is rather simple when compared to other swaps that have been done. You are essentially replacing the motor with another one of the same type, just with different internals. Thusly, your engine harness, motor mounts, everything will be the same as before. Of course, it would be a good time to replace the motor mounts while you have the engine out, as it is far easier at that point. If you do the transmission swap, you will also need a new or used driveshaft of the required length. You may be able to have you old one resized, or you can find one from the car you are attempting to emulate, namely the e34 540i/6.

In terms of time required, if you haven't done this kind of thing before, it could take as long as 24 hours of solid work. If you have done this kind of thing before, you could have it done in 8. There is very little thought required for this swap, as the motors are dimensionally identical, as are the bolt patterns. It is, as far as the usual requirements of a swap go, the exact same motor.

[Lastb0isct]

There have been several threads about the M60B30 to M60B40 swap in the last few months, take a look for them.

A centri-type charger is essentially a belt driven turbo. Thusly, it builds boost in a linear fashion based on engine RPMs. Therefore, at low RPMs, it makes virtually no (<2psi) boost, the area you are looking for more performance in. Up top, it makes full boost, giving the best power output. The other two kinds of superchargers, roots and twin-screw give far better low RPM performance. Unfortunately, nobody makes kits that use those chargers for the M60.

If you pick up a used M60B40 (that has had at least a compression and leakdown test) The only thing you will physically need to start the car is a M60B40 DME. In terms of making the car drive properly, you will also need the right transmission. If your 530 is an auto, then a manual swap is advised, as then would be the time to do it. I made a thread around the beginning of the year which had a detailed parts list required for the auto->manual swap in an e34, look for it.

The actual swap is rather simple when compared to other swaps that have been done. You are essentially replacing the motor with another one of the same type, just with different internals. Thusly, your engine harness, motor mounts, everything will be the same as before. Of course, it would be a good time to replace the motor mounts while you have the engine out, as it is far easier at that point. If you do the transmission swap, you will also need a new or used driveshaft of the required length. You may be able to have you old one resized, or you can find one from the car you are attempting to emulate, namely the e34 540i/6.

In terms of time required, if you haven't done this kind of thing before, it could take as long as 24 hours of solid work. If you have done this kind of thing before, you could have it done in 8. There is very little thought required for this swap, as the motors are dimensionally identical, as are the bolt patterns. It is, as far as the usual requirements of a swap go, the exact same motor.

i have a 530i/5 so i need the tranny.

[xatlas0]

i have a 530i/5 so i need the tranny.

Almost forgot, since yours is a 95, there is a distinct chance that you will also need to have the ECU reprogrammed to counteract the anti-theft systems in the ECU. Conforti or D'Sylvia should be able to do that for you, so you might as well chip it at the same time.

[fm.illuminatus]

On that block just the bore out and associated parts is going to run you more than 5K because of the sleaving required. Sorry. I'd just supercharge.

[Lastb0isct]

Okay guys, sorry to bring back a semi-dead thread but i have a couple more questions. Im still debating on what to do. I would like some help on pricing things out.
For the 540i/6 swap it'd be:
1)Engine - 2000$
2)Transmission - 1000$
3)Drivetrain - 400$
4)ECU/DME - 500$
Total ~ 4000$(factoring other little bits and pieces)

Now i've been thinking about this and maybe, since the parts from my car can be used in a 540i, i should just get a new diff, wheels, a chip, and suspension. I know i could probably get high quality wheels+chip+suspension for roughly 2500$. What i need to know is how much is the diff? I've been searching but i can't seem to find how much it'd be.
Correct me if im wrong but my 530i has a 3.67 diff that is fully open, correct?
What would give me a good avail. torque boost without sacrificing 10mpg?

[Craig S]

Honestly, selling your car and buying a 540i would probably be cheaper. And easier.

Or, just get a blower for your car and call it good. At least the if you sell the car you can pull the blower off and sell it for some extra money. A swapped car isn't going to be worth much, if any, more than a regular 530i.

But that's just me.

[Goat128]

Just some thoughts.. that $4000 quote looks really low, otherwise it could be really good deal. I thought the engine alone would cost you around $4000 so I'm wondering where you got the quote from. What about labor your just going to do it yourself, then?

As for your other question, the only thing I can think as far as boosting power without sacrificing mileage, and this conjecture is all you can do put in a chip and drop in a k&n panel filter, I mean theres really not much. Exhaust but thats probably minimal gain.

Oh.. and the 3.67 sounds pretty high to me, I could be wrong but i though it was below 3, like 2.67 or something like that.. maybe someone else knows.

final thought - in socal theres always a lot of cars for sale and its not hard to find a 540. :) But I like my 530 theres nothing wrong with it.

[640CSi]

I will sell you the engine, 5 speed trans and E code ECU for 2000 provided you ship.

[Lastb0isct]

yes, i remember talking to you 640CSi! How've you been? That sounds real good! I'm still saving for your motor+tranny, just getting people's opinions. I really want to buy right now but school must come first. We'll see how im doing mid-semester and you don't have to wait for me, though it'd be nice ;)

As for my main question, how much would a diff out of a 535i be? Other options?

[Goat128]

As for my main question, how much would a diff out of a 535i be? Other options?


I say go junkyard hunting. This is what I plan on doing when I get around to it, I'm looking for some other stuff like headers.

And that 6-series with the m60 - I was just thinking today "wouldnt it be crazy if someone dropped an m60 into an e24 coupe.. meh but then the motor mounts probably wouldnt line up." crazy. maybe it does line up.

[640CSi]

The mounts don't line up, they are too far back but I welded plates to the subframe placing the mounting points farther forward. I am trying to get a local to sell me his 88 635 because he has some ECU issues and can't get it running. If I can get it from him for cheap, I'll pull the motor out of what's left of the rust pile the V8 is in and swap it into a nicer chassis, otherwise I will want to get rid of it.

[bradley sauceda]

curious to know, was this swap done? What diff should be used to increase torq. on a 530i? And are there headers for the 530i? Can you swap out the auto for a 6 speed. dont care about changing the m60b30. My goal is to make it one the fastest around....

[Antrieb]

I swapped an m60b40 into my 530i for $2,500.

[Goat128]

curious to know, was this swap done?
I think he's contemplating selling his car, so I don't think it was done.


What diff should be used to increase torq. on a 530i? And are there headers for the 530i? Can you swap out the auto for a 6 speed. dont care about changing the m60b30. My goal is to make it one the fastest around....
check out bmwe34.net

there are not aftermarket headers but you can get the stock headers ceramic coated.

The transmission is swappable but not trivial. The 5 speed from the 530im will bolt up but I'm not sure about the 6.

[cayotye]

i have also done this swap and it pretty simple if u have a little mechanical know how and a buddy to help u my engine cost me 1500 complete with wiring harness in all it cost me about 2300 for the engine swap .there was nothing really wrong withg my old engine it just needed valve guide oil seals at 75k so i decided to change the engine for more hp cheaper than a supercharger

[M60540]

I am just about to do this swap with a 95 530ia and a 94 740ia. I would like to keep the (slush box) from the seven. Is there any thing I can upgrade on that tranny? Should, and what other parts would be worth swapping between the two cars not pertaining to the engine swap.? Brakes? Suspension bits?

[5mall5nail5]

S/C'ers dont have low end grunt unless they're roots or twinscrews

wow cant believe I didnt see the dates on this. Ugh.

[xatlas0]

I am just about to do this swap with a 95 530ia and a 94 740ia. I would like to keep the (slush box) from the seven. Is there any thing I can upgrade on that tranny? Should, and what other parts would be worth swapping between the two cars not pertaining to the engine swap.? Brakes? Suspension bits?

The trans computers and harnesses are different, so swapping the 5HP30 onto the 530 will be difficult at best. Other bits from the 7-er, like the brakes, would be a nice upgrade over the 530 parts.

[M60540]

Is the 5hp30 not the same Tranny that is in the 94 540i? I thought it would be a straight forward swap. I realized the computers are different but I didn't realize the wiring harness would be as well. What would you suggest for a transmission? Is it really easier to go to a standard? I have had more experience with E30s AND E28s. Any help is much appreciated. I really just want to save this 530i and get some power at the same time. I also have a 90 535ia. I used a few parts from it on my driver. I was going to junk it but what do you think? The 740i is a e32 by the way.