Borgwarner turbo, experience?

[AJC]

i have an S200sx on mine and it's what dreams are made of

[SHaDoWLanDZ]

EFR7670 1.05 external wastegate

573hp - 490-500lbft

@ Oppliger Motorsport




I think it's dynoed in 5th gear.. not sure tough.

[sydneyvon]

See stuart from MSD comments about EFR

http://passionford.com/forum/general...-turbos-4.html

[Cossie col]

See stuart from MSD comments about EFR

http://passionford.com/forum/general...-turbos-4.html

Says it all really as these are worth every penny

[sydneyvon]

That's why I have a 7064 sitting on the floor before people start buying them and the price goes up.

[sydneyvon]

EFR7670 1.05 external wastegate

573hp - 490-500lbft

@ Oppliger Motorsport


http://cimg0.ibsrv.net/gimg/passionf...c2a7ef1926.jpg

I think it's dynoed in 5th gear.. not sure tough.

Why would it matter if it's dyno-ed in 5th gear?

[SHaDoWLanDZ]

I don't know acutally, i asked Mark and he always dyno-ed in 4th, but i believe Romain told me this was a dyno in 5th, not sure tbh...

[VADreamer]

It has to do with torque multiplication from gear ratios. Normally, fourth gear in a five speed is 1:1 whereas fifth gear is overdriven (output shaft spins faster than the engine). I don't claim to understand all of the math, but chassis dyno pulls are traditionally done in the 1:1 gear.

Boyd

[SHaDoWLanDZ]

Nice explanation!!