calculating DCR on LT1/LT4
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TECH Enthusiast
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From: Metairie, LA
calculating DCR on LT1/LT4 Can anyone help me with calculating DCR on an LT1? I don't know much, if any of the vital info. I have flow #s, but no cc's on my GTP LT4 heads. Don't know bore, stroke, head gasket thickness, cylinder head chamber volume, etc...I'm trying out ideas for a custom cam. Car is actually an LT1, but with mods is more like an LT4 "clone" No undercut crankshaft, etc..I checked out the DCR calculator from Kelley, but can't download it. Thanks for any help.
This place has a lot of info
http://www.grandsportregistry.com/lt1vslt4.htm
as for DCR i am pretty sure you need cam specs to calculate it
http://www.grandsportregistry.com/lt1vslt4.htm
as for DCR i am pretty sure you need cam specs to calculate it
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Here's a decent little calculator
http://www.kb-silvolite.com/calc.php?action=comp
and here's a few more
http://www.wallaceracing.com/Calculators.htm
http://www.kb-silvolite.com/calc.php?action=comp
and here's a few more
http://www.wallaceracing.com/Calculators.htm
Thread Starter
TECH Enthusiast
Joined: May 2006
Posts: 631
Likes: 0
From: Metairie, LA
Thanks fellas. Merv-do you know Gasket Bore and Rod Length for stock LT1? I'm trying to calculate DCR for some custom grind ideas I'm throwing around. 226/232 .570/.580 112 LSA for example. Would you know what the duration @ .006 would be for that cam? How do I figure out the valve events?
The Gasket I use is a Felpro #1074. It's a .039" thickness, and 4.125 bore. Rods are 5.7", unless you are talking about Pushrods, and they are 7.2" I believe. Most of the Cams measurements are given at .050", so if you mean .060", duration is going to be the same, cause that is just how the Cam is cut.
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Originally Posted by eLTwerker
Oh yeah, and duration at .006 is advertised duration. Can you find that given duration at .050?
http://www.empirenet.com/pkelley2/DynamicCR.html
Another great calculator that allows you to compare up to 4 cams at once.
http://users3.ev1.net/~black_ops/ca...0calculator.xls
Last edited by seawolf06; Jan 1, 2007 at 08:20 PM.
