STI_Wolf Posted September 7, 2009 Share Posted September 7, 2009 what are the differences between the EA82 N/A heads and the EA82 turbo heads? do the turbo heads have larger ports or valves? I know the cams are different.. but thats all i know.. Link to comment Share on other sites More sharing options...
The Beast I Drive Posted September 7, 2009 Share Posted September 7, 2009 EA82 N/A heads have a single intake port and a single exhasut port. EA82 Turbo heads have 2 intake ports and a single exhaust port. Those are the most obvious differences, basically a Turbo head can't be used as a replacement for a N/A head, the manifold wont bolt up to it. Also the passenger side head on the Turbo heads has oil and coolant ports for the turbo. -Bill Link to comment Share on other sites More sharing options...
Redcap Posted September 7, 2009 Share Posted September 7, 2009 EA82 N/A heads have a single intake port and a single exhasut port. EA82 Turbo heads have 2 intake ports and a single exhaust port. Those are the most obvious differences, basically a Turbo head can't be used as a replacement for a N/A head, the manifold wont bolt up to it. Also the passenger side head on the Turbo heads has oil and coolant ports for the turbo. -Bill Would there be any real benefit to modding the turbo head for a N/A motor? Link to comment Share on other sites More sharing options...
GeneralDisorder Posted September 7, 2009 Share Posted September 7, 2009 Would there be any real benefit to modding the turbo head for a N/A motor? You would then have the MPFI non-turbo EA82 as seen in the late 80's XT's. The benefit is about 9 HP with fuel injection, 9.5:1 comp. pistons, and the right cam. Not worth the effort. GD Link to comment Share on other sites More sharing options...
Redcap Posted September 7, 2009 Share Posted September 7, 2009 You would then have the MPFI non-turbo EA82 as seen in the late 80's XT's. The benefit is about 9 HP with fuel injection, 9.5:1 comp. pistons, and the right cam. Not worth the effort. GD That is around what I was thinking, but I wasn't exactly sure. These little cars are still pretty new to me. Link to comment Share on other sites More sharing options...
STI_Wolf Posted September 8, 2009 Author Share Posted September 8, 2009 there arent any spfi turbo heads? i thought the 3 port heads only came on the XT's.. so the regular old gl-10s had 3 port too? just in a different style manifold? Link to comment Share on other sites More sharing options...
GeneralDisorder Posted September 8, 2009 Share Posted September 8, 2009 so the regular old gl-10s had 3 port too? just in a different style manifold? Correct - all MPFI EA82's (including the turbo) used dual intake port heads. There are two different manifolds - the XT manifold is refered to as the "spider" manifold because of it's shape. SPFI was never equipped with a turbo and shared the single intake port heads with the carb engines. GD Link to comment Share on other sites More sharing options...
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