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Discussion Starter · #1 ·
Havent seen a Before and After shown before - so put up for interest

Before:
UK Spec R33
unmodified but for boost at 1bar

After:
as Before, but add
Apexi Induction Kit
De-kat pipe
Trust Downpipe
Dual Drager exhaust




Data is off Abbey's Dynapack - so at axle
I thought the most interesting part was the change in the shape of the torque curve....(of course the overall improvement is also satisfying :D )

cheers

Harry
 
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torque figures

PE,

the dyno reads the torque at the axle so the figure is multiplied
by the axle ratio[ gearbox and diffs are torque multipliers]
So divided the axle torque by the diff ratio as we run the car in 4th gear 1-00 gear ratio you get the flywheel torque.



Mark
 

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Harry,

I would guess it's as the wastegate starts opening, looks like you've now got better boost control to me although your torque still dips a bit at about 5k. May be think about a boost controller next....

Peter.
 

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Discussion Starter · #10 ·
Thanks Peter - the shopping list gets longer all the time....:)

re the dip - have also seen other flatter curves from a remap...damn...add a programable ECU to the list also
 

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Regardless of that, most stage 1 cars make anywhere from 370 to, in one case (SteveC), 415bhp. Normal transmission losses on chassis dynos seems to come out between 120 and 135bhp. So add to 280 a slightly lesser tranmssion loss of say 100bhp, you're back to the norm, 380bhp. As I said, it stacks up to me. :)
 
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