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      06-24-2008, 10:21 PM   #53
Use it or Lose it
skim7x's Avatar

Drives: too fast
Join Date: Sep 2006
Location: Fort Worth, Texas

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2007 335i  [5.00]
Originally Posted by Dr_Dirt View Post
But Dinan's published work shows that we only have an 8.9% drivetrain loss at peak power.
335whp*1.122= 375bhp only 10hp off, so not too bad.

I guess its just simpler to look at the gains made to discount dyno differences.
Dinan's overall gain from just a stage 2 tune according to the original published works is 342-296= +46 whp gain sooo...
Has anyone seen a 46 whp gain or more?
Unfortunately, I didn't get a baseline dyno, as I should have. But, according to other 335i stock dynos (also done on dynojets), cars made 273rwhp, 268.82rwhp, and 280.22rwhp (

My numbers once again:
Dyno Run 1: 328.2rwhp; 349.2rwtq
Dyno Run 2: 328.9rwhp; 359.4rwtq
Dyno Run 3: 323.6rwhp; 361.5rwtq

My average hp: 326rwhp
Stock average hp: 274rwhp
Difference between the two: 52rwhp

In conclusion, 52rwhp > 46rwhp

But as you can see, the rwhp varies widely, partially due to different output of each individual engine, partially due to different dyno machines, and partially due to elemental factors like temperature, humidity, and altitude. So really, the fact that some people are getting 15rwhp below what Dinan advertises does not warrant an accusation of fraud. Like someone else said previously, the numbers are what they are...
'07 Space Gray 335i coupe - R.I.P.

COBB ProTuned | AMS | CP-e | BMS | Quaife

Last edited by skim7x; 06-24-2008 at 10:39 PM.