Hi all

 

Took the zed to a roling road for the first time last week and it made 230rwhp@5500 :cry:

 

I thought this is quite low as i have done;

 

hks induction kit

de-cat

MINES ecu

boost controller running at 13 psi

 

The guy said it was the first time he has put an auto on a rolling road.

 

While on the dyno the left bank was smoking a bit (black smoke) does anyone think this could be O2 sensor problems, AFM problems or just the guy who put the car on the dyno :confused:

 

The printout i got was S**T it only had a graph of the rwhp on it.

Any feedback i greatful as i have no idea.

 

cheers Eddie

there is some discusion as to the transmision losses you can attribute to the autos, and also how they should be run on the dyno. I have heard people quote 40% losses which would give you 322 at the crank, if that makes you feel better? Also remember that the 280/300 figure, iirc, was quoted at the crank which, for the 280bhp, would give you a base figure of 168 at the wheels (assuming the same 40% losses) which means your mods have given you an added 62 ponies :)

Take it up to Thor Racing and get it Dynoed more accurately...

THOR estimated a 24% loss for my autobox - but estimate is all you can do unless you hook the flywheel up :eek: :eek:

there is some discusion as to the transmision losses you can attribute to the autos, and also how they should be run on the dyno. I have heard people quote 40% losses which would give you 322 at the crank, if that makes you feel better? Also remember that the 280/300 figure, iirc, was quoted at the crank which, for the 280bhp, would give you a base figure of 168 at the wheels (assuming the same 40% losses) which means your mods have given you an added 62 ponies :)

 

RW figures should be "real world" figures for both autos & manuals. its the way they measure loss through the transmission that gives an auto higher figures for estimated FWHP

I know paul, was backward engineering a rwhp start figure from Nissans claimed BHP :)

well cheers for the advice i will be getting it dyno'ed properly next time. what about the black smoke that was coming from the left bank what could that be? if the AFM or O2 sensors where knackered would it show on the ecu diagnostics

 

Eddie

well cheers for the advice i will be getting it dyno'ed properly next time. what about the black smoke that was coming from the left bank what could that be? if the AFM or O2 sensors where knackered would it show on the ecu diagnostics

 

Eddie

if they were in-operative then yes if you for instance had a lazy O2 sensor or one that was failing then that would not show up , tbh neither of these would be a cause for black smoke at high RPM

 

Ryan