Originally Posted by emilio700

Spool/response always matters on road courses. It could be that it's more an issue for advanced drivers who tend to apply throttle earlier to balance the car on entry and mid turn. Being able to modulate torque early in a turn without needing to fight a timing factor allows for higher min corner speeds.
Higher min corners speeds are generally what separate data traces from intermediate to advanced level drivers. Same terminal speeds, same exits speeds but the better driver enters fast and slows down less. Precise torque control is a key factor. So a turbo that responds more slowly is intrinsically at a disadvantage to a faster responding turbo.

Watch my video in Bullet at Buttonwillow posted here and elsewhere. Note how low I let the revs get. Note how I add maintenance throttle early in most turns. To get that level of response with a traditional Garrett would mean making less power. The world has changed. Take advantage of those changes or don't. That's a personal choice but no arguing that old stuff works as well as the new stuff.

Originally Posted by acedeuce802

The argument is valid that boost threshold becomes less important on track, if you are never below 3000 rpm at the slowest corner, then you don't care about boost below that. But spool and response is another aspect that the EFR/TSE will trump the FM setup, and that is absolutely critical. It'll help the motor feel more like a naturally aspirated motor, where pressing the accelerator is actually correlative to instant torque output.

Originally Posted by ridethecliche

It's a 2560. If you're at 3k or above you'll see boost before your foot hits the floor. The 2k spool test isn't really a realistic simulation for a track car.

Originally Posted by emilio700

Higher min corners speeds are generally what separate data traces from intermediate to advanced level drivers.

Originally Posted by sixshooter

I always thought if I was at WOT on the track at below 4k RPM then I should have downshifted.



Mine are more like data scribbles.

Originally Posted by ridethecliche

Yeah, exactly my thinking. Once you're in the powerband... how does it affect things. It's a 2560. If you're at 3k or above you'll see boost before your foot hits the floor. The 2k spool test isn't really a realistic simulation for a track car.

If you want to behave like an NA car, then boost by TPS comes into play even more.

I'm not arguing that FM setup is better, as I'm pretty sure that it's not. I was just offering a counterpoint given that I've read a lot of folks on this thread say that it's not that important a consideration on track. Again, if the OP was after a bigger turbo than the 2560, I think it'd come into play in a much bigger way.