ek9 152 bhp?


Haha yeah for sure. Small world aye
 
gglavin said:
I had this issues lads turned out the timing was off, made 151bhp, got timing sorted and made 182bhp
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Where was that checked??



Vtec6000 said:
Disagree, Wheel HP is far more relevant than flywheel hp when measuring power with a chassis dyno, if using a engine Dyno then yeah flywheel power would be most accurate as you are measuring power directly at the flywheel.
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We are talking chassis dynos.
I always thought the point of a dyno is to determine or fine tune an engines performance as well as determin loss factors ie gear box shafts etc,
As a regarded tuner i thought you would be measuring @the fly since you dont control tcf which can be adjusted with a keybord stroke, (and we know people who do this) its logic even if the cars geomitry, camber, toe, ackerman is out it can affect your results same way changing ratios, gear patterns and differentials would also matter
simple fact its impossible to calculate it acuratly.... every gear in every box as well as the drive shafts account for some loss that cant be adjusted to be 100% correct,
No insults above just curious as im trying to get into the mappin/tuning side of things.



walle said:
I agree with you there, the losses through the gearbox count aswell, fair enough saying the engine produces X amount of bhp - a bit pointless though if it looses say 40-50bhp through the box though.
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They do count just not to engine tuning performance. its straght cut gears, better output shafts and lighter wheels to minamise the loss of inertia afik?
 
paulr5 said:
We are talking chassis dynos.
I always thought the point of a dyno is to determine or fine tune an engines performance as well as determin loss factors ie gear box shafts etc,
As a regarded tuner i thought you would be measuring @the fly since you dont control tcf which can be adjusted with a keybord stroke, (and we know people who do this) its logic even if the cars geomitry, camber, toe, ackerman is out it can affect your results same way changing ratios, gear patterns and differentials would also matter
simple fact its impossible to calculate it acuratly.... every gear in every box as well as the drive shafts account for some loss that cant be adjusted to be 100% correct,
No insults above just curious as im trying to get into the mappin/tuning side of things
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What chassis Dyno will accurately measure flywheel HP?? How would you determine what power you've lost through drivetrain on a chassis Dyno??

Adjusting TCF is only something I've ever heard of on Dynapacks. I tune cars on a 4wd Dyno Dynamics and it has what is called shoot out modes, you select the appropriate mode for car your running i.e shoot4 for front wheel drive NA. All correction factors which could be adjusted to alter power figures are locked out so the operator cannot falsify results.
 
I'm not sure why your moaning about 155whp lol, thats pretty good for the mods you've got. That should roughly equate to around 185-190bhp on most modern cars so if you take into account that your engine will have lost a few horses over the years then its actually not a bad result at all
 
Top guy, Was it cam timing out or just dizzy? must of felt like you un hitched a trailer after that was sorted haha


Vtec6000 said:
What chassis Dyno will accurately measure flywheel HP?? How would you determine what power you've lost through drivetrain on a chassis Dyno??

Adjusting TCF is only something I've ever heard of on Dynapacks. I tune cars on a 4wd Dyno Dynamics and it has what is called shoot out modes, you select the appropriate mode for car your running i.e shoot4 for front wheel drive NA. All correction factors which could be adjusted to alter power figures are locked out so the operator cannot falsify results.
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None thats the point im making that its practically impossible to do with all the correction factors above.
Road map FTW....
Think the Dynapacks could use that lock out feature
 
paulr5 said:
None thats the point im making that its practically impossible to do with all the correction factors above.
Road map FTW....
Think the Dynapacks could use that lock out feature
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Which is why Wheel HP is more realistic than Flywheel HP on a chassis dyno. I wouldn't consider WHP off a Dynapack to be correct though as your not measuring power at the "wheels" but rather at the hubs. I don't think the lock out feature on Dynapacks would go down to well with a certain individual:D
 
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