Quote:
Originally Posted by mgbsr20det
Thanks for the advice , how much boost do you think I could run after studs and head gasket ? What gasket and studs would you recommend ? I thought reintroducing the wastegate to the exhaust further down wouldn?t be as effective as keeping it separate
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After studs and gasket, you?d be able to max the turbo. For reliability?s sake, keep it at 22-24. Figure on 10hp per psi of boost.
While keeping them separate is a better solution, packaging constraints may not allow a ?muffler? to be added to the ?screamer? pipe. The point of keeping them separate is because of the turbulence created at the wastegate/turbo outlet. If you look at the EFR series turbos, all wastegate outlets are angled back into the exhaust stream, rather than having to make that flow path turn 90* back into the exhaust path.
I?ve had great experience with Apexi and Cosworth gaskets. I prefer Apexi over Cosworth simply because of the lack of a fire ring on the Cosworth. As for studs, ARP makes a great product and you can get by with their off the shelf variety for the SR. If you intended on going big, I would recommend Mazworx ?bullet end? studs because they bottom in the threaded holes, utilizing all threads available.