refresh951

Did some tuning tonight on this motor with the Vitesse Stage V turbo and it looks like turbo back pressure is significantly less than with the Super65. Making the same power at about 2 psi less boost pressure

Tom M'Guinn

Awesome! I recently had John make me an updated Stage 5 turbo to reduce back pressure and can't say enough about it. One bar of boost by 3k, endless power up top... Cheers!

fast951

​​​​​​That's awesome, thank you for sharing the results. The S5 is very efficient and flows much more than the turbo you replaced, which explains your results. Even though it's a larger turbo, it is fast spooling without raising backpressure.

​​Jon mentioned he likes the spool up of the S5. What do you think of the spoolup and the power delivery?

Any chance you can share the dyno results and backpressure? I texted Jon, I may have an old number. If you do not want to post the charts here, would you or Jon email them.

refresh951

This is the Dyno with an Evergreen modified Super65 at about 15.5 psi. I have been comparing MAF voltage and IDC with your turbo. Spool up is definitely improved and very linear feeling. Your S5 has made the car a lot more fun, very nice turbo indeed. I have not measured backpressure but I know it is significantly less as we are requiring significantly less intake pressures to produce the same flow with no other changes except the turbo.