ForcedFirebird's m20 dyno thread.

[ForcedFirebird]

My ex Bosch FLA 203 dyno was reading 211whp / 249bhp for a M20B29 @7000rpm.

That sounds about spot on with a dynojet. I have been seeing in the 210-220 pretty consistent with stroker builds.

[hasa]

That was just a random video I saw in a car sales ad. Not mine absolutely. But from my point of view as E30 owner it looked performing very well.

When the tire pressures, roller friction and tie straps are done ok the measurement of driveline losses work ok. But to be honest there are horrible anecdotal examples where the losses are all over the place.

My ex Bosch FLA 203 dyno was reading 211whp / 249bhp for a M20B29 @7000rpm.

[ForcedFirebird]

anymore details? to be fair 310bhp on a European dyno is like 200whp everywhere else (excluding dynocom or land and sea/dynomite)

If there were at least some kind of consistency, BHP calcs could work, but a t56 robs a lot more power then a g260 - calculating backward never works. At least this thread is primarily Dynojet, which I have personally found extremely consistent. The race organizations here often will bring a Dynojet out to the track to catch any cheaters in the HP/WT classes - they are usually within 1-2% of the Dyno we have here by the shop.

[ForcedFirebird]

https://www.youtube.com/watch?v=W5FE21I2hRA

310bhp N/A M20B29 on the video. Probably 400whp on a Dynocom scale ...lol.

Is that you driving?

e30 with m20b25 vs a pack of RX7 & 8's at the SCCA national runoffs (championships). Easier to see speed when there's other cars on the track. How much HP does this one have? ;)

https://www.youtube.com/watch?v=kDQjQPWKUpw&t=310s

[digger]

https://www.youtube.com/watch?v=W5FE21I2hRA

310bhp N/A M20B29 on the video. Probably 400whp on a Dynocom scale ...lol.

anymore details? to be fair 310bhp on a European dyno is like 200whp everywhere else (excluding dynocom or land and sea/dynomite)

[hasa]

https://www.youtube.com/watch?v=W5FE21I2hRA

310bhp N/A M20B29 on the video. Probably 400whp on a Dynocom scale ...lol.

[dvallis]

Updating the thread with new turbine numbers

Original: Precision Turbo T4 6262 0.7 A/R compressor, 62 mm inducer, 82 mm exducer, 0.84 A/R turbine, 2.5" inlet, 4" outlet



Updated: Same as above, changing turbine to 0.58 A/R

19 PSI


10 PSI

[SLEEPYDUB]

^^^we had discussed you power a long time ago on this forum. Local made 518 @ 19psi, same turbo, but straight b25, same cam too - glad to see it's verified. One of the plots that aren't to be made public. :(

Yea i was skeptical about that when you mentioned it! I am glad to see that its possible, and boy look at that curve, looks great for a single cam!

[SLEEPYDUB]

Updated with Video
Watch till the end

https://www.youtube.com/watch?v=4TxTXA_uxRM

[ForcedFirebird]

^^^we had discussed you power a long time ago on this forum. Local made 518 @ 19psi, same turbo, but straight b25, same cam too - glad to see it's verified. One of the plots that aren't to be made public. :(

[SLEEPYDUB]

Over the last few months we opened up a dyno tuning shop, DyNomad Mobile Tuning, here in North Louisiana. Since we have opened, I've had very little time to mess with my own M20 E30, but yesterday after installing our lift, we had a little free time to see what the ol girl puts down, and we were not disappointed. This car has been sitting for the last 6 months. The tank was still 1/8th full of old Ethanol, so of course we used it. The battery was dead and had to be jumped off to even get onto the rollers. Air filter was dirty and is small, but we left it on.

Here's the run down on the setup:
Engine: Unknown Mileage STOCK B27 Short Block with borrowed #2 piston, rod, and bearings from a destroyed motor we had laying around.
Head: STOCK head gasket with ARP Studs, 280/274 cam, HD Rockers and Springs, Welded Coolant Channels.
Turbo Setup: RSI Manifold, Precision T3 Gen 1 6266 0.84, 2.85“ straight Exhaust (yes, not even 3"), dirty and small air filter, Precision 46mm wastegate, no BOV
Fuel: ID1000, Walbro 450, STOCK feed and and return,
STOCK fuel rail, STOCK FPR
ECU: MS3 Pro Evo, Full Sequential Ignition and Fuel, LS coil packs, Mac 4 port boost controller, AEM wideband.

This is the first time this car has ever seen a dyno, as it is 100% street tuned. We figured it was making pretty good power, so before we tore it apart for the forged stroker swap, we decided to see what kind of power we had been making on this stock bottom end for the last few years.
Wastegate pressure - ~13psi - 404whp/415tq
High Boost ~21psi - 522whp/527tq

We honestly could keep going. Plenty of fuel left for more power, I think we could get close to 600whp if we wanted a glory run.
We are going to work on a few small things before we remove the engine, maybe we will get it back on there for a glory run. We will see.

Watch till the end for a treat

https://youtu.be/4TxTXA_uxRM

[digger]

Those cars both have a 3.2mm thick HG as well

goes down to ~9.3:1

[2mAn]

I sent this to Jason Cammisa in the hopes that we can help his Touring make some more power lol

[AWDBOB]

m54b30 pistons have CH 28.3

206.1-135-28.3-44.8 = -2.0 mm so pistons sits 2.0 mm above deck. if you machine 2mm off with a stock gasket that is like 10.5:1

Those cars both have a 3.2mm thick HG as well

[digger]

m54b30 pistons have CH 28.3

206.1-135-28.3-44.8 = -2.0 mm so pistons sits 2.0 mm above deck. if you machine 2mm off with a stock gasket that is like 10.5:1