Head porting

[Lsttype]

I'm taking the heads off my TTA engine. What are some of the secrets to porting these heads? I know they're different than a standard GN head so I was wondering if there's anything different?

 

[TURBOGTA]

GM 3800 FWD heads

 

[jarredsoon]

Send them to CHampion racing heads for porting they have experience with the TTA cylinder heads. Not sure many other car owners would bother to port these heads as they are mostly used on non performance sedans.

 

[TTA855]

Not sure many other car owners would bother to port these heads as they are mostly used on non performance sedans.

I'd love to know what you mean by this. Thanks.

 

[jarredsoon]

What I mean is the cylinder head on the TTA motor is more commonly used on front wheel drive sedans that are not very often modified for performance. As a result of few car owners of FWD sedans removing this particular cylinder head to port them, there are not many machinists that port and polish this particular cylinder head. This is in contrast to say a small block chevy cylinder head that has been ported and polished by many machinists and the tips and tricks have all been documented. This is all my personal speculation.

 

[Lsttype]

I'm porting them myself. Was just wanting some tips on where the most gains are. Plan on working the bowel area and gasket matching the ports

 

[TTA855]

What I mean is the cylinder head on the TTA motor is more commonly used on front wheel drive sedans that are not very often modified for performance. As a result of few car owners of FWD sedans removing this particular cylinder head to port them, there are not many machinists that port and polish this particular cylinder head. This is in contrast to say a small block chevy cylinder head that has been ported and polished by many machinists and the tips and tricks have all been documented. This is all my personal speculation.

Thank you. I see you ran 9.93 with your TTA (awesome). Did you port your heads?

 

[Lsttype]

Thank you. I see you ran 9.93 with your TTA (awesome). Did you port your heads?

I'm guessing he ditched his head's and went aluminum gn1 heads

 

[TURBOGTA]

Las time I used Champion Tom was in the process of moving. I take it move is complete?

 

[jarredsoon]

I ran ported TTA heads and got to 10.5. My current set up is with TA Performance heads.

 

[Lsttype]

I ran ported TTA heads and got to 10.5. My current set up is with TA Performance heads.

Yes I've heard the limit is around mid 10s then the tta heads lift

 

[jarredsoon]

That is exactly what happens, run more boost even with a clean tune and no knock the heads just do not make any more power.

 

[Lsttype]

I'm rebuilding the motor. I'm thinking of doing a stroker. Turbo will be a 6262 on E85. I'd like the compression to be around 9/1. I want to to be 10.70s and maybe a 10.50 at higher boost.

 

[robert lee]

I have some PP big valve tta heads that i removed from #818 since the eng. is going in a GN, when i get a chance i will post some pics

 

[Lsttype]

I have some PP big valve tta heads that i removed from #818 since the eng. is going in a GN, when i get a chance i will post some pics

Thanks appreciated

 

[Michael henzel]

Send them to CHampion racing heads for porting they have experience with the TTA cylinder heads. Not sure many other car owners would bother to port these heads as they are mostly used on non performance sedans.

They have better flow numbers then those used on TT’s and GN’s do the research.

 

[jarredsoon]

I was just saying that more TT and GN cylinder heads have been ported than Turbo Trans am cylinder heads because of the huge number of TT and GN cars vs the extremely small number of TTA cars. I am comparing the physical number of heads ported, not the flow rates or performance of the heads.
You must have gotten confused from my sloppy grammar I can see how you would be mistaken.

 

[eticket]

Luke, don't go crazy porting the heads... just do some gasket matching and some bowl work... less is more unless you know wha tyou're doing.