Got my heads ported
As cast, the SR ex ports are a fair amount smaller than 440-1 ex ports.
I have seen it before where someone made them about the same size as -1 ex ports.
It usually isn’t necessary to go quite that big.
That being said, if you buy the cnc ported SR’s from Indy....... they use the same program on the ex port as what they use for the -1’s.
I have a set of SR’s here for freshening that I ported about 20 years ago(actually the first set of them I ever did).
Here are a couple of pics of the ex port opening.
1st is with Indy header gasket, 2nd is a TTi gasket from 2” headers:
As cast, the SR ex ports are a fair amount smaller than 440-1 ex ports.
I have seen it before where someone made them about the same size as -1 ex ports.
It usually isn’t necessary to go quite that big.
That being said, if you buy the cnc ported SR’s from Indy....... they use the same program on the ex port as what they use for the -1’s.
I have a set of SR’s here for freshening that I ported about 20 years ago(actually the first set of them I ever did).
Here are a couple of pics of the ex port opening.
1st is with Indy header gasket, 2nd is a TTi gasket from 2” headers:
