Hey all, long time no post

My HG blew between 3+4 last week. (boosted 1100) Did the calc's after the fact and determined i had a static comp of 10.5:1 (spicy)

Now in order to attempt to make Rylstone, i can either go single gasket and risk another blow out, or double up, lower comp to around 9.69:1 and pray to the engine gods?

1098+60
12g206 head 26cc chambers
Deck height 13 thou
gt17 6psi

Have cleaned and polished the head and top of block (obvs would love to do a skim to true them both, but probably not able with time at the moment)

Are there any other options?

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Here am I sitting in my tin can far above the Moon
Planet Earth is blue and there's nothing I can do...



“A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.” - Jeremy Clarkson

I had a good chat with an engine builder a few weeks back and he said he’d had good results with his turbo engine running a double head gasket.

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I did it for years on my 1310 when running flat top Mahle pistons on the street. It got the C/R down to 11.0:1....!

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.