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forcedbird94
03-09-2011, 01:24 PM
Is there any diff between 90 heads and 94 heads ?????

Regul8r
03-09-2011, 02:52 PM
Is there any diff between 90 heads and 94 heads ?????

From what I have read they are the same design.
What was different is they heat treated the 94/95 heads supposedly to make them better but in reality it hardened them and made them brittle more prone to cracking over time and during overheating.

Others will chime in on this.

forcedbird94
03-09-2011, 03:33 PM
ok so no big power diffrence then

Regul8r
03-09-2011, 03:44 PM
no the power diff was from other things...

Passenger side exhaust manifold flowed better
larger MAF
larger injectors
Different intake plenum to the different SC

I'm sure there are other factors in computer programming etc...