TTA heads on GN block

[anders]

Hi!
Does the TTA heads bolt rigth on to a GN block,does they use the same bolt pattern ?

 

[ScottHeidinger]

They bolt on but the exhaust ports are different so you have to have the TTA specific headers to use them. The TTA heads have smaller chambers so with the GN pistons the compression ratio will be higher than the 8:1 stock ratio.


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[David Husek]

Hi!
Does the TTA heads bolt rigth on to a GN block,does they use the same bolt pattern ?

The TTA heads bolt on as the blocks are the same. The TTA heads have a smaller chamber, so depending on head gaskets used, compression will be around 8.8:1. The TTA piston has a larger dish over the GN piston. I have built many using the stock GN pistons with no problems.

 

[anders]

Great,thanks !