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[Walkinshaw]

Originally Posted by G&D PERFORMANCE

Then you should also know that a steel intake pipe becomes a major heat sink heating up intake air tenfold over plastic or rubber in a hot engine bay.And that inlet air temp measurement is most critical at the point closest to where it enters the engine not much earlier in the inlet tract.

Glenn

Exactly where i measure IAT(manafold plenum). I also datalog my IAT temprature against an ambiant temp sensor. I run the same inlet pipe as stockstandard. I get 99kpa up to 4800rpm with a drop to 95kpa at arround 5850rpm, so only a restriction really above 5000rpm.

With regards to temperature, on a 33deg day, IAT values were never above 38deg.