What did you do for your ZHP/BMW today?

[UdubBadger]

My hypothesis is that how your car dynos has a small amount to do with factory variation- and a very large amount to do with maintenance and going the extra mile in that regard. I really like the shop, so as I make changes I'll dyno it pretty frequently. I have a few power tricks up my sleeve too.

FWIW the E46 M3 guys think the drivetrain loss correction is more like .82, because lots of E46 Ms dyno around 275rwhp stock.

In that case I've got like 250 at the crank, and I don't think that's correct.

My car also must have had the software update based on the DISA dip, do you guys concur?

possibly or they just smoothed the shit out of the file to make it look less noticeable.

i think .88-.85 is WAY more realistic and thats usually what we use on RWD cars at Eurocharged to estimate. That should put you right near the 235 crank claim

[zhp43867]

Thanks Ryan!

So Udub, based on my flat AFR how can Eurocharged make more power off of the stock car? I know there are other things but AFAIK AFRs are the lowest hanging fruit.

Also what you said means M3s are overrated from the factory! From what I've seen I'd estimate the Q1-Q3 of M3s would be 260-285rwhp stock.

[Nivo]

203.73hp and 195.31 lb-ft of torque. I was hoping for more- but the car is totally stock and I think my car is already doing pretty well on the spectrum of stock Dynojet graphs I've seen. Water pump is failing so it could be sapping .5hp or so, Dr. Vanos was done which may or may not make any difference in the torque curve, and my DISA dip is quite subtle.

I kind of ignore other random dynos when I see the results... no way to compare.

I put the results at the end of the video, failed incentive I guess...

pretty much that is what you will get on the ZHP on a dynojet on that given day.
If you ask for the sheet with "0" smoothing you might get more peak lol.
Also to see what the car did that day with actual weather effects and not SAE corrections you can have them send you the uncorrected file or just the run files alone and open them up in winpep.

Mine is on a Mustang Dyno which has a load to the wheels.
I adjusted my specs to closely resemble yours. (mustang dyno spits out a data file you can use on excel)

What I do notice your peak torque doesn't occur until after 4500 rpms showing that something is going on with the variable runner stuff (DISA)

Attachment 4249

[Hornung418]

Going to pull my GM5 this afternoon...Should keep me from having to drive anybody anywhere

[ryankokesh]

I guarantee it'll keep you from driving period! Lol. What're you doing with it?


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[Hornung418]

GM5 only controls Central locking, windows, wipers, trunk release and interior lighting.

I'm sending it to Scott Johnson to have it repaired. BMWGM5.com

[ryankokesh]

Oh, haha, I thought it wouldn't start without a gm5 installed! Oops.


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[Whitexi]

I bought some more cleaning items do I can try and do the paint correction

[zhp43867]

pretty much that is what you will get on the ZHP on a dynojet on that given day.
If you ask for the sheet with "0" smoothing you might get more peak lol.
Also to see what the car did that day with actual weather effects and not SAE corrections you can have them send you the uncorrected file or just the run files alone and open them up in winpep.

Mine is on a Mustang Dyno which has a load to the wheels.
I adjusted my specs to closely resemble yours. (mustang dyno spits out a data file you can use on excel)

What I do notice your peak torque doesn't occur until after 4500 rpms showing that something is going on with the variable runner stuff (DISA)

Attachment 4249

You can see the correction factor is 1.01- so the numbers are almost the same as the uncorrected were. I will unsmooth it and take a look. Also- on the DISA note- installed this today.

This:



Replaced this:



My car's exhaust note is even deeper and she's running like a beast :D

[Hornung418]

Very nice, Derek!! I'm glad Brady did that DIY...I would have never ever thought to look into a repair for the DISA. On a scale of 1-10, 1 being incredibly easy, how would you rate the process, and the clarity of the instructions?

And please add that to the DISA thread.