my mate has a s4 rx7 stock and he is looking 4 a wastegate, what size would best suit his needs?





thanks https://www.nopistons.com/forums/pub...DIR#>/cool.png

Is he using a stock turbo, stock manifold etc? If not, what setup is he using, what boost is targeting, more info is needed...

yip everything is stock, he just wants to know what whould b best to use, he has got plans later on down the road to do a bit more work to it.





thanks

The stock system and the bolt on hybrids good for 400whp all use internal waste gates so the answer is none.



***Information not relavent to the original answer has been deleted to keep this thread focused on the original question. READM MY POST IN THE PINNED SECTION TO FURTHER CLARIFY THE POLICY********

Who buys turbo kits??? And 9k$ is a fairly accurate price for everything to get 450whp imho



And depending what turbo you get you may not need to buy a wastegate, some turbos come with internal wastegates. And more info is need to accuratly answer the o/p question imho

This thread is full of misinformation, so im only gonna go ahead and try to help the original poster.



Unfortunately, the stock manifold doesnt leave enough room to mount a traditional external WG. But if your sure you need more flow, you can buils a "divorced downpipe" similar to this..

http://www.supracharged.com/sale_ite...d_downpipe.jpg

If that isnt enough, instead of rejoining the WG pipe into the downpipe, you could bore out and eliminate the stock WG flapper, and run an external WG and dump to the atmoshere.



Its up to you to decide if you need to go that far.

thanks to all people u have answered or have tried to answer this, i will see him again tonight at work and let him know, and i will get more info from him.





thanks again.

I was thinking about that design. Thats how DSMs are. If anything, just port the wastegate some.