18.5 or 21cm^2 Holset turbine housing for 400rwhp?
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^Wat Catch-22 said. I'm running the HX40 now with the 19cm^2 hotside. 4" exhaust tapered to 3" at the dp, then 3" single all the way back. Running a tubular racing manifold from Shook Motorsports, Synapse 50mm WG. Stock 9s all the way around, 720/1000cc injectors, Cosmo pump, Microtech Lt8s ecu, small streetport on a S4 motor.
It has a rough tune @9psi running off the WG right now and the boost doesn't lag. Around 3500rpms I get all 9psi and it comes on RIGHT away throwing you in the seat. I'm still waiting on my tuner to get his *** up here to tune it at 15psi. Still thinking of putting in 1600cc secondarys and a bosch fuel pump. Also have an aeromotive FPR I need to install and a Jacobs FC100 ignition box. Aiming for 450rwhp @ 20 psi. Or around 400 @ 15ish. Oh using meth/water injection too.
It has a rough tune @9psi running off the WG right now and the boost doesn't lag. Around 3500rpms I get all 9psi and it comes on RIGHT away throwing you in the seat. I'm still waiting on my tuner to get his *** up here to tune it at 15psi. Still thinking of putting in 1600cc secondarys and a bosch fuel pump. Also have an aeromotive FPR I need to install and a Jacobs FC100 ignition box. Aiming for 450rwhp @ 20 psi. Or around 400 @ 15ish. Oh using meth/water injection too.