What kind of numbers your E21 is putting out?

[ajamisen iloa]

I tried to search but I couldn`t find anything. Model and mods would be nice.

I would like to know what changes work best on each motor, this is not a competition:D. Of course different dyno, temperature etc. makes this difficult but we can see some numbers...

My 323i 10/81 gave 167hp/223nm from motor(original 143hp/190nm)in Bosch dyno this year. Next year I`am tryin to get over 200hp/???nm with stock exhaust, distributor and bosch k-jetronic, but this is only what I wish/want:stickoutt.

Mods: cylinder head (M20B25 valves, double valve springs and little cleaning on the exhaust and intake side).

[blitzed310]

I put mine on the Dyno and the screen said 404-Error Not Found. Guess I didn't have enough to spin the drums :rofl

[TheNeek]

M42, Stock... puts down around 100 at the wheels.

[wayfast]

0

[DrewDude320i]

mine just makes a lot of noise.

[jrcook320]

Engine:
2.0L with flat top pistons ~8:1 compression
I-J Crank scraper
Bavarian Engine Exchange 1.8L ported and polished head
280/280 cam at .050 lift
Bavarian Autosport 8mm plug wires, Bosch Red coil
TEP 13 lb. 215mm Flywheel
14" Electric cooling fan
AC removed

Turbo System:
Dinan manifold
Garrett T25, 60 trim .80 AR, internal waste gate (from an S13 SR20DET)
Hallman pro boost controller
12" intercooler
1G DSM blow off valve (crushed)
65mm e12 528i throttle body
Divorced port 2.5" dump pipe (SR20det aftermarket)
2.5" mandrel bent exhaust

Fuel system:
Porsche 931 fuel distributor
Porsche 931 76mm air flow meter
Volvo 240 turbo WUR
Volvo 240 turbo ignition retard canister
Porsche 911 turbo fuel pump
Mercedes Benz 450 SEL 6.9 fuel injectors

Dyno'd at 188hp/174 ft-lbs tq. at the wheels (about 215-220 bhp) on 7 psi boost creeping to 10 psi.

http://i25.photobucket.com/albums/c58/jrcook320/Dyno.jpg

I'm now boosting at 14 psi and am estimating (through flow calculations and interpolation) that I'm between 240-250 hp assuming 17% powertrain loss and absolute boost pressure % increase over 7 psi (so 7psi to 14psi = 24% increase):

http://i25.photobucket.com/albums/c58/jrcook320/EstimatedDyno.jpg

[jjgbmw323]

Props Josh. Forced induction is the best bang for the buck IMO. And your car rocks.


Right now I have the stock m20 in my 323i.
I am planning on swaping the 2.9 m20.

1990 325i engine. 885 head ported and polished.
Plus 1 ferrara valves.
Custom rocker arms
Shrick 288 cam
Megasquirt
19lb mustang injectors
325i Intake Manifold
11 pound 325i flywheel

IE Crank Scraper IE Crank Sleve
S50 Rods, ARP Bolts
S50 Crank 86.5mm
524td oil pump
325i block Bored 85 mm
Weisco custom pistons with reliefs in case the timing belt ever goes

Looking for aprox 240 HP

and I will be rocking a Hartge valve cover powdercoated red, that does not add to the performance but looks darn pretty.

[OLD MAN]

My M10:
225,000 miles on it, but with new rings, bearings, injectors and valve job at 213,000 miles has 86.5 HP and 84 ft pds torque at 6700 RPM (at the wheels) last year.

Motor is stock except for exhaust, MSD coil and plugs.

[Rickysbmw320i]

I would hope I am 240ish as of now. I will find out one of these days. I think after tuned carbs and EDIS all worked out, I will be looking at some good numbers.

[VacMan]

I put mine on the Dyno and the screen said 404-Error Not Found. Guess I didn't have enough to spin the drums :rofl
:lol:lol I was going to say 17rwhp, but I like this answer better.

[myersport]

My old 320i/2.7:
Supereta Short block
885 Head
325i valvetrain
1.3 Motronic with Chip
Stock 323i exhaust
142 rwhp @5500 rpm
171 rwtq @ 3500 rpm

--dennis

[BoomerDJ]

i dunno but im hoping to be between 160-170, when my car is runnin good ill go dyno and let you all know

[AlaskaBimmer]

I was running 140hp/161 tq on the 323i, with the 2.7 L eta motor with a big cam. Last year I put in 325i valves and ported the head a bit and added a new very loud and larger exhaust. I hope to get it dynoed this year, but next year I'll re dyno for sure.

[Bill in MN]

Dennis

That number is somewhat of a surprise. I'd have thought you'de see more from that setup.

[Scott72]

Hoping for about 185-190 at the crank with the following:

M20B25 w/motronic
M20B23 crank (mild stroker put you at about 2.6L)
Mild port on 885 head with schrick 272 cam
Headers
19 lb injectors
323i Flywheel
Mark D chip

Throwing a 323i crank in a M20B25 isn't too popular here, but I read it makes a really sweet revving motor. I have an extra M20B25 sitting in my garage, so I'll use that for my base.

[uberpanzer]

My old 320i/2.7:
Supereta Short block
885 Head
325i valvetrain
1.3 Motronic with Chip
Stock 323i exhaust
142 rwhp @5500 rpm
171 rwtq @ 3500 rpm

--dennis


Dennis

That number is somewhat of a surprise. I'd have thought you'de see more from that setup.


That is a fair share more. That's a SuperEta as a base, 127hp/171torque @ the flywheel. So going up to 142hp and 171torque at the wheels is a pretty big increase on a motor that really is just a very lightly modded SuperEta (some higher revving bits, no real breathing improvements). Still very respectable numbers at the wheels for an e21. :D


I do not have any hard number on my car yet. I'm still working on getting my AFR sorted out and need a BOV so I don't pop off my intake charge pipe when a dyno operator decides to just snap off the throttle at the end of the run. :stickoutt

[myersport]

I thought it was a pretty fair return for basic parts-shelf engineering. The best part was that it had 155 rwtq available at only 200 rpm. The car was strong enough that it could push a well driven e36 M3 over US129 / at Deals Gap.
--dennis

[uberpanzer]

hehe...that's almost able to make claim the e36 M3 did. One of the things they were making a selling point was that the e36 M3 engine at idle made more torque than the e30 M3 at max torque output. OK, OK, race bred 4 banger vs stop-light bred inline 6, but still. :D Oh well, I'm a closet Eta freak.
:devillook

[AlaskaBimmer]

I don't know what rpm my torque comes in at since the dyno wasn't recording until about 2.5k rpm....but I was at around 150 or so then.

Link to my dyno graghs from last year.
http://forums.bimmerforums.com/forum/showpost.php?p=9640182&postcount=12

Now I wanna redyno the baur with the new mods....not sure there are any dyno days left this year at our only dyno.

[E21FZRNU]

Gotta be at least 60hp on the butt dyno, considering it's got 265k and probably hasn't had anything more than a valve job and the tune-up I did six months ago, I don't think it's all that bad. I can still catch a fat second gear scratch if I want to.

[myersport]

The best part was that it had 155 rwtq available at only 200 rpm.


I don't know what rpm my torque comes in at since the dyno wasn't recording until about 2.5k rpm....but I was at around 150 or so then.


My bad. Make that 155 rwtq At 2000 rpm.

--dennis

[BoomerDJ]

My bad. Make that 155 rwtq At 2000 rpm.

--dennis

haha i was like 200rpm:confused, i want that:evil2, even at 2000rpm i still want it :)

[ajamisen iloa]

Hoping for about 185-190 at the crank with the following:

M20B25 w/motronic
M20B23 crank (mild stroker put you at about 2.6L)
Mild port on 885 head with schrick 272 cam
Headers
19 lb injectors
323i Flywheel
Mark D chip

Throwing a 323i crank in a M20B25 isn't too popular here, but I read it makes a really sweet revving motor. I have an extra M20B25 sitting in my garage, so I'll use that for my base.

Are you going to order new pistons or taking away from old pistons?

[Turbo 3.8L E21]

no real point me posting as its not a BMW engine in my e21, but stock motor was 141rwhp, when turbo setup is finished will be pushing just on 300hp at wheels :) and running 12sec 1/4 mile's :)

[Bill in MN]

I thought it was a pretty fair return for basic parts-shelf engineering. The best part was that it had 155 rwtq available at only 200 rpm. The car was strong enough that it could push a well driven e36 M3 over US129 / at Deals Gap.
--dennis

I guess you're right. I'd not paid attention that the intake was SuperEta.

[myersport]

I guess you're right. I'd not paid attention that the intake was SuperEta.

Actually, the only supereta component on the engine was the shortblock, all else was off of a '90 325i. A couple of things to remember:

1) The supereta engine is fairly low comp. 8.5:1 or so.
2) While the 325i valvetrain increase airflow over the supereta components, much more needs to be done to make use of the extra cc properly. Bigger cam, port/polish, larger injectors, exhaust, more compression, etc. The engine pulled hard, but it was basically over by 5500 rpm. It would keep spinning up to 7500 if you wanted, it's just not making anymore power. but it was bulletproof reliable.

--dennis

[BaronOfIpanema]

Never tested mine but I'm thinking I must be making at least 70 to 75 HP.

That tears it. I will begin modding this engine. Missing my M60b40 too much.

[nowloadingrage]

Actually, the only supereta component on the engine was the shortblock, all else was off of a '90 325i. A couple of things to remember:

1) The supereta engine is fairly low comp. 8.5:1 or so.
2) While the 325i valvetrain increase airflow over the supereta components, much more needs to be done to make use of the extra cc properly. Bigger cam, port/polish, larger injectors, exhaust, more compression, etc. The engine pulled hard, but it was basically over by 5500 rpm. It would keep spinning up to 7500 if you wanted, it's just not making anymore power. but it was bulletproof reliable.

--dennis



I my 1 experience driving this car I can say only this. I could not shift gears fast enough. Awesome car!

[chili02]

I will be driving the e21 with the 2.9 litre motor for the first time today in 3 months and judging from the idle I still have some some tuning issues to sort out. End of August I will take it to the dyno and let you know if it was worth it.

Darren