js2fst

iTrader: (12)

I just the GM high-tech january issue with the article about wastegates on 5th gen disc kits. Ati always has kept me away from this approach. Any thoughts? Blow off and waste gate?

JAX04

iTrader: (17)

Is this what your talking about??

https://ls1tech.com/forums/forced-in...ntrollers.html

The Alchemist

iTrader: (19)

I read the article as well, and don't really see the benefit. Essentially you're setting the pulley ratio so that you hit max rpm for the blower, but you blow off any additional boost generated above a certain threshold. I have always been under the impression that max torque is what kills motors, not neccesarily horsepower past that rpm. So if you pulley the setup to make 550 rwtq max, but then limit the boost after that point all you're doing is losing horsepower.

I don't know, maybe I'm way off.

98Z28CobraKiller

iTrader: (17)

You hook the wastegate to an electronic boost controller with CO2 which allows you to ramp in the boost. This is for traction control and getting the most out of the blower.

stangtrader

iTrader: (2)

Idk how well it works but I do remember reading about it in a 5.0 magazine probly about 7 years a go. Seems like a good idea but could be wrong

TurbopigB4C

iTrader: (5)

I was about to post on this after reading it and think it is a great idea. A centrifugal blower is limited on the low end so that it wont over boost at higher rpms. By using a wastegate you can use a smaller pulley to have your target boost hit earlier in the rpm range. I have always preferred turbos because of the simplicity to adjust boost pressure based on what octane you run. With this kind of setup you potentially could run a 17-20 psi pulley and control it with the wastegate to take it down to 8-11 psi at 91 octane and when you use race gas raise the boost pressure for the track.

TurbopigB4C

iTrader: (5)

It shouldn't hurt the top end because you are going to have the boost level the same at higher rpm. The wastegate only allows excess boost pressure to bypass so you essentially will be having the benefit of no lag of a supercharger with the torque and top end like a turbo. Torque is what breaks parts but it is also what gets the car up and moving so the more the better as long as you can keep traction.