At the begin of this year, I put my car on a dastek dyno.
It's a d16y8 MT

I got 123whp and 149hp on the crank
4-2-1 dcsports header
no cat
2inches exhaust
k&n
95 octane gasoline
ignition time advanced on the distribuitor
195/50r15 with Original eg6 93 15" rims

Now after a few mods I went to the same dyno again

I got 110whp and 155hp at the crank
4-2-1 dcsports header
2inches exhaust
no cat
skunk2 IM
k&n
320cc injectors
ignition time advanced on the distribuitor
100% alcohool
(the mix is lean.. I need 13% more fuel)
12lbs flywhell
195/50r15 with IRON 15" rims


Why I'm having to much losses at the wheel?

Could be the heavy IRON rims?


please guys... help me

sorry for my crap english

 

you put in much larger than stock fuel injectors.........do you have anything to tune them with?

running TOO rich will hurt your power....... you might be running to rich.

 

we put the lambda meter.

and we saw that it lean!

I need something like 13% more fuel.

But that's not the problem that I want to overcome.
My problem is that I'm loosing A LOT of power on the wheels!

That's something wrong..

 

I think this dyno compensates the measured wheel power with the measured wheel drag.

If the first run is performed in 4t gear your drag is low---> higher wheelpower.
If the second run is performed in 5t gear your drag is higher ----> lower wheelpower.

If the dyno compensates this at the right way, it will give the right crank power. The crank power is quit normal and the gains are normal for these mods you added to your motor.

My dyno does the same. Just don't look at the wheel power, just compare the crank power.

Modified by gaskleppie at 12:41 PM 10/2/2005


Modified by gaskleppie at 10:05 PM 10/2/2005