Swapping from iron to aluminum heads

[doogievlg]

I thought Eddie heads have 63cc chambers? Going from a 65cc chamber to 63cc should bump compression.

 

[jerry6]

I thought Eddie heads have 63cc chambers? Going from a 65cc chamber to 63cc should bump compression.

They have both 63cc and 65 cc

 

[IQ52]

Any OOTB aftermarket aluminum head I have ever tested has a big improvement in air flow over a stock iron head. Hence the power increase.