ITB's on a 24v project, Dyno results Post 136!!!

[ForcedFirebird]

yeah a worn out M50B25 is just not going to do it justice thats all.

Still made 177whp lol. I searched and searched posted dynographs. Seems a cammed, healthy m50b25 is about the same as these ITB's.

[ForcedFirebird]

lol we are talking M50b25 right? 155rwhp from a fresh M50b25 is BS they are 190ish crank from BMW.

a fresh M20B25 with careful attention is 150-155whp

The dyno says otherwise, well the one I have been using. Healthy stripped down race trim, single resonator motors make 145-155whp. That's a spec e30 built to the rules of .020" over, crank baffles/scrapers and balancing only. In fact they are DQ over 168whp (IIRC).

[digger]

Agreed, but I traded my wife's minivan with a slipping transmission for the e36 and used it to get everything working properly. This has all been done on the very few spare pennies I have from my own pocket.

There's a few locals whom I wrote dyno'd chips for, probably going to use one of them for a before/after, none of which are b25's. We both know the 45mm is a tad large for a stock b25, but seeing this much power from a tired one is promising. Now that everything is working properly and I have a grasp of the Alpha-N OBD1, can't wait to put them on a larger/healthier motor. Might not even bother with putting the stock manifold/car on the dyno and wasting the time, effort and money.

yeah a worn out M50B25 is just not going to do it justice thats all.

[ForcedFirebird]

Please overlay that curve with the baseline, and a description of what all is different between them.

If it's just the ITB conversion then a before/after dyno would be extremely interesting to see! If you added headers and other crap, not so much.

Bone stock m50b25, OBD1 exhaust manifolds, stock cams (verified in pic below). No baseline, this was a spur of the moment trade for the e36 shortly after the first manifold adapter was prototyped. 200k mile motor in bad shape. Will get some numbers on healthy/larger motors soon.

The odo shows just under 201,000, and appears to have had a very hard life.

[digger]

A "PRO3" race motor is lucky to get 155 on the ground. Thats whatever tune, whatever exhaust, no internal or intake mods at all.

177 is a fucking miracle on a bone stock B25.

lol we are talking M50b25 right? 155rwhp from a fresh M50b25 is BS they are 190ish crank from BMW.

a fresh M20B25 with careful attention is 150-155whp.

also dont focus on peak numbers

[StereoInstaller1]

A "PRO3" race motor is lucky to get 155 on the ground. Thats whatever tune, whatever exhaust, no internal or intake mods at all.

177 is a fucking miracle on a bone stock B25.

[ForcedFirebird]

needs a baseline.......IMO should have done test on a healthy B28.

Agreed, but I traded my wife's minivan with a slipping transmission for the e36 and used it to get everything working properly. This has all been done on the very few spare pennies I have from my own pocket.

There's a few locals whom I wrote dyno'd chips for, probably going to use one of them for a before/after, none of which are b25's. We both know the 45mm is a tad large for a stock b25, but seeing this much power from a tired one is promising. Now that everything is working properly and I have a grasp of the Alpha-N OBD1, can't wait to put them on a larger/healthier motor. Might not even bother with putting the stock manifold/car on the dyno and wasting the time, effort and money.

[Bimmerman325i]

Please overlay that curve with the baseline, and a description of what all is different between them.

If it's just the ITB conversion then a before/after dyno would be extremely interesting to see! If you added headers and other crap, not so much.

[digger]

needs a baseline.......IMO should have done test on a healthy B28.

[LJ851]

^Bone Stock as in a baseline run or after the ITB's ? I am not familiar with what a stock one of those puts down.

Dynorun 34 leads me to believe post ITB install. Nice afr curve...

[ForcedFirebird]

200k mile bone stock m50b25...

[Wanganstyle]

Awesome. I wanna race lemons with trumpets but hidden in a fiberglass reinforced milk container with a yogurt cannister based cone filer

Sent from my SAMSUNG-SGH-I337 using Tapatalk

[ForcedFirebird]

I have no idea why it makes that noise. This car is seriously a huge POS, but the motor is strong. Light flywheel so it sounds like a rod knocking at idle in N, interior is trashed, paint has no clear left, pops out of reverse, leaks oil, leaks PS and the trans sounds like a supercharger. It does have DDM coil overs, new control arms, tie rods and other tidbits, but whatever. These ITB's is the only reason I got it. Traded it square for my wife's Honda Odyssey with a slipping trans. I have known the last 5 owners and it always whined like this, has fluid and shifts fine (except having to hold it in reverse). Haven't verified if it's the original engine, but the clock shows just over 200k.

Once the testing is done, probably going to throw a cage in it, spare ZF, stock suspension and intake, then take it out to ChumpCar.

EDIT: Oh yeah, also can see the parking lot through the battery tray, so it's got rust too :/

[LJ851]

^ You got straight cut gears in that thing ?

[ForcedFirebird]

Fresh cold start and drive around the block. OBD1, still MAF delete on a 413 red label...