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TopgunZ · 07-19-2018, 08:00 AM

There has been a few discussions around adding a wastegate to the intake tubing.

Supercharger...

The idea here is that you overspin the supercharger to say 16psi when you only want 12psi. You put a 12psi spring in the intake wastegate. It opens at 12psi and vents off the additional boost. This in turn will push the boost curve to the left so instead of having 3psi at 3000rpms, you would have something like 5psi at 3K and full boost before redline. This would obviously have its benefits.

Now for you turbo guys (namely mid-mount)...

Say you wanted 10psi in the manifold. Here you would have your actual exhaust wastegates set to say 15psi through a boost controller. Then you would have a 10psi spring in the intake wastegate hooked directly to the manifold. The benefit of this is that the turbo will be spinning much faster through a run and when you let off the pedal it will not lag when grabbing the next gear. So a larger turbo will not slow down enough and you would have 10psi on tap. It also helps spool times as the exhaust wastegate would stay completely clsoed then pop open instead of slowly opening to reach the 10psi.

Who has any experience with this?

07-19-2018, 08:00 AM	#1 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	Wastegate On Intake There has been a few discussions around adding a wastegate to the intake tubing. Supercharger... The idea here is that you overspin the supercharger to say 16psi when you only want 12psi. You put a 12psi spring in the intake wastegate. It opens at 12psi and vents off the additional boost. This in turn will push the boost curve to the left so instead of having 3psi at 3000rpms, you would have something like 5psi at 3K and full boost before redline. This would obviously have its benefits. Now for you turbo guys (namely mid-mount)... Say you wanted 10psi in the manifold. Here you would have your actual exhaust wastegates set to say 15psi through a boost controller. Then you would have a 10psi spring in the intake wastegate hooked directly to the manifold. The benefit of this is that the turbo will be spinning much faster through a run and when you let off the pedal it will not lag when grabbing the next gear. So a larger turbo will not slow down enough and you would have 10psi on tap. It also helps spool times as the exhaust wastegate would stay completely clsoed then pop open instead of slowly opening to reach the 10psi. Who has any experience with this? __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM