Quote:
Originally Posted by codyace
FWIW: I've yet to see a FC car with this turbo making this sort of power (now on another build altogether).
Don't get me wrong, PFC is a nice tool, and great for those that want to tune themselves/fiddle with their car...but I'll stick to ROM tunes from either JWT or Enthalpy for street cars. You simply can't beat them in regard to price, performance, and drivability.
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To be fair, though, Cody, can you find another PFC user with the same setup (same cams, extrude honed/swained mani and turbine housing)?
Clearly, the standalone can do anything (and more) than the ROM tune can do, if put in the right hands.
You could literally put the Enthalpy or JWT tune onto the PFC and see the same results.
Plus you have the added benefit of being able to fine tune even further upon making small modifications, or changes in temperature, or etc etc etc.
Needless to say, I think the biggest difference in why all of your cars put down that extra 20-30 ft-lbs between 4500-7000 and the resulting increase in horsepower is due to
1) The swaining/extrude honing
2) Having a tune done by an expert with a LOT of research done into the timing/fuel for this particular setup.
I am making a similar torque curve as these cars, minus about 20-30 ft-lbs across the board.
I believe this is because:
1) Need better boost control to hold boost up top
2) Timing is NOWHERE near optimized (tuner didn't do ANY steady-state timing optimization)
3) AFRs once in boost are VERY rich (10-10.5).
I am not saying it is EASY or CHEAP to have that setup, but I just don't think that the "big secret" is in the ROM tune.
That ROM tune surely has seen multiple iterations (at least on your car) of datalogging and refinement to get a timing/fuel map that works so well with your cams/setup