[Mk2] [Turbo] Which turbo for quick spool

[2mad]

My TT CT based hybrid made over 400 bhp

Holy cow, 400bhp @1.4bar on a ct must be a record, whats the spec of the turbo?

[Mike 2]

I dont think its any record, Mine has the stage two Turbo technics S175.

The turbo is rated from 380 - 500 Bhp whereas the more common hybrid that most discuss is the smaller S148 Stage one turbo rated as 240 -380.

With a rev 1 spec engine on forged pistons 800cc injectors, K&N filter, de-cat, self built exhaust, cams and valves, some other fettling and an Apexi ecu we made 380 initially.

Later I did a rebuild with lower compression, a rev 3 head and a some other stuff and made 408, this was an averaged out figure after about 10 pulls whilst playing with the exhaust cam on the dyno on a very hot sticky day with the RR doors shut.

I think the S175 came with a -21 actuator but I fitted a -31 garret ex Ford Sierra Cosworth item with an adapted end piece to match the Turbo waste gate linkage. All set up on the bench with a pump, I would have used a -34 but thats for another day.

[Peter Gidden]

Where was it mapped?

[Mike 2]

I built them and Ryan mapped them.

I will be back Thurs eve, PM me if its important.