Kaane

iTrader: (2)

Can someone calculate DCR for me for this combo?

Stock Ls1 shortblock, 60cc heads, TSP 224R 114LSA Cam. Stock MLS headgasket.

'00Formula

iTrader: (2)

Depending on the advance ground in, between 8.5 and 8.8ish

Kaane

iTrader: (2)

6.84 is way too low. Something is wrong.

Sales2@Texas-speed

iTrader: (5)

So long as you didn't order it "custom" with a different ICL than standard, you will net about 11.1:1 static, and about 8.7:1 dynamic.

Kaane

iTrader: (2)

8.7:1 hmm.... a bit high for 91 octane. Should I change cam or run a thicker head gasket? or just run slightly less timing?

A.R. Shale Targa

iTrader: (2)

Running a thicker head gasket is almost always the wrong way to reduce the
compression. Perhaps get the TSP 231/234; seems real popular, nice idle,
and very streetable with the right tune. You have enough static comp for it
to work well

Isolde

iTrader: (4)

How is any of this useful without knowing what elevation the OP lives at? In Denver, you can run more DCR on 91 octane than you can in Death Valley.

oakley6575

iTrader: (3)

How much dynamic compression can you run at 2000 feet with 91 octane??

Kaane

iTrader: (2)

Sea level. I am in socal.

Sales2@Texas-speed

iTrader: (5)

I'd agree it'd be more beneficial to retard the cam rather than running a thicker gasket!

Isolde

iTrader: (4)

The real issue is the cranking compression. Going for, say, 200 psi ( safe on pump premium ) takes both more SCR and more DCR in Denver than in Death Valley. But 200 works wherever you are in this nation.