400SE copper ringed gasket.

[TVRleigh]

As far as I know the copper ringed TVR gasket as on the 400SE's was thicker than the compersit.
do any one know how thick they was or how much thicker than the compersit ones.

Thanks
Leigh

[andymadmak]

I thought they were thinner..


Actually, according to the bod who built my engine, the TVR copper ringed gasket is about 55thou, (very thick fire ring) The standard LR composit gasket is about 40 thou, and the tin gaskets are about 25 thou. I now run a tin gasket.

Andy

Edited by andymadmak on Wednesday 18th July 15:47

[TVRleigh]

Hi,
well I have the new style heads with the smaller chamber, and the heads have been skimmed 10 thou.
so that will make it another 15 thou.

do you know what your before and after compression ratio is, and are you using your orignal heads.

Thanks
Leigh

[andymadmak]

I'm using original heads

If you give Mike Johnson ( boostedLS1 on this site ) a quick e mail on the subject I'm sure he'd be happy to fill in the details. He did my engine rebuild and is VERY knowledgeable in this area.

My CR was 8.8 to one before. Mike CC'd the heads and took lots of measurements.
It was decided to deck my block, rather than skim the heads as a way of getting the C/R back up This was because the pistons were running well down the bores, and Mike wanted to improve the squish as well as the CR
There was also something about angles and manifolds and stuff like that that I didn't understand!

Edited by andymadmak on Wednesday 18th July 17:04