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Originally Posted by Scotty305
Very cool idea, was this influenced by Barry Bordes' in-chamber pressure testing?
Will your new port clear the tension bolt near the top of the current exhaust sleeve?
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Yes, When I saw that there was 91 psi remaining in the chamber at 195 ATDC, I decided that some of that blowdown should be used.
Yes, the port will clear by about 1/16" It is almost like Mazda intended this to be the exhaust port location.
Like Sen2Two said, the machining is not going to be as hard as welding up the cooling jacket and modifying the sleeve.
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1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers)
1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)
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