Triumph GT6 high compression pistons

I designed the high compression dome on these pistons and had them made by Arias. It remains to be seen how they perform. They look much studier than the stock pistons and also studier (and a lot heavier) than a JE piston.

Based on precise measurements and calculation we should be getting about 12.5:1 compression now. It is actually quite amazing how small changes influence the compression ratio. To make this calculation you must know the following: the combustion chamber volume exactly, the compressed thickness of your head gasket, the compressed diameter of the head gasket, the piston to block deck clearance, the volume of the piston dome.

We are hoping to go vintage racing at Lime rock in two weeks with no engine testing.

Oh, I forgot to mention "buy my copper nickel alloy brake line kits" for your vintage Austin Healy, Triumph, Jaguar, MG, or Porsche here http://www.austinhealeywood.com/brakelines.html

Category:

Autos & Vehicles

Tags:

• Triumph
• GT6
• race
• car
• high
• compression
• pistons
• brake
• lines
• engine

[GT6Time]

I have a question. I don't know if you know this, but will installing domed top pistons from a late GT6 Mk3 in my early Mk3 with flat top pistons give me a higher compression ratio? I hope you can answer this, because all those forums on the internet freak me out with their different information

[Porsche9elfer]

@GT6Time I can not answer your question specifically. If you would like to raise the compression I would highly recommend shaving the head first. You can get to about 10.25:1 by shaving material off the head. This allows you to continue to use flat top pistons which are superior to dome tops in general.

[GT6Time]

Thanks! I'm not shaving the head or something, because I have got it all done already. Only now my pistons seem to be worse than I thought and I have to buy new pistons. Thats why I was wondering if I would get a higher compression bij installing original Triumph domed-top pistons instead of flat -tops.