Tell me about "quench" TPI
06-02-2013, 05:26 PM
#1
Burning Brakes
Thread Starter
Tell me about "quench" TPI
What is desirable in a 350 w/ 113 heads & TPI ?
Is it the same as a carbed engine ?I remember reading somewhere about tuning issues with quench or zero quench .
Sorry if its a lame question ..
Is it the same as a carbed engine ?I remember reading somewhere about tuning issues with quench or zero quench .
Sorry if its a lame question ..
06-02-2013, 08:26 PM
#3
Race Director
Obviously GM was not too concerned about Quench when you add .039" to .025" = .064"
If I recall, the stock block is .025" in the hole, so you can add the gasket thickness to that.
You can reduce the gasket thickness which will increase your CR, but you need to be careful that your drive train is stout and check your piston to valve clearance. It can help in terms of combustiability.
You will read that .040" or slightly less is "ideal" but you can spend a bunch of money have the block decked and heads shaved to achieve a specific CR,
If I recall, the stock block is .025" in the hole, so you can add the gasket thickness to that.
You can reduce the gasket thickness which will increase your CR, but you need to be careful that your drive train is stout and check your piston to valve clearance. It can help in terms of combustiability.
You will read that .040" or slightly less is "ideal" but you can spend a bunch of money have the block decked and heads shaved to achieve a specific CR,
06-02-2013, 08:52 PM
#4
06-02-2013, 09:59 PM
#5
Team Owner
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St. Jude Donor '05
With LD 25-35 is common. If you can get it closer to 40 the better but dont worry about getting it exact wont make a whole lotta difference. Just something to shoot for. Same thing with DCR dont get too wrapped up over it.
