Guest polarity Posted November 20, 2002 Share Posted November 20, 2002 Vortec heads Performer intake Crane Powermax #114142 camshaft, 216, 228 @.050 - 112 LSA Edelbrock Performer manifold Holley 650 block bored .30 now one more question, what type of pistons should i use. I've read lots of stuff on this site about them. hypertech's any good? (grumpy if you have anything on pistons I would very much appreciate it) Billy Quote Link to comment Share on other sites More sharing options...
Guest DRK Posted November 20, 2002 Share Posted November 20, 2002 Check the valve lift of that cam. Stock vortec heads are limited to around .450"? of valve lift. Not sure of the exact number. Scoggin Dickey Chevrolet sells vortec heads that I think have had the valve guides machined to allow for more valve lift. I just wanted to make you aware in case you did not not know that this could be a potential problem. http://www.sdpc2000.com/cart.asp?action=catalog_start&catid=2172 Danny Quote Link to comment Share on other sites More sharing options...
Guest polarity Posted November 20, 2002 Share Posted November 20, 2002 wow, that seems pretty cheap. The place in town I'm was looking to buy my heads from wanted $1500 for JUST the heads. That has gaskets, heads, intake, everything for like $800. Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted November 20, 2002 Share Posted November 20, 2002 to get the correct quench distance the head gasket should be about .020 or less thick, that thin gasket and the vortec heads 64cc combustion chamber will require a piston with about a 18cc-22cc negative dome size like this one KB142 your dynamic compression will be ok with this piston for high test and KB101this piston for regular with that cam http://www.kb-silvolite.com/page25.htm to run pump gas. the guys are correct that you might need the upgraded heads to run that .480 exhaust lift cam (a very good idea to get them anyway) as the stock vortec heads can,t handle a .480 lift sometimes (clearance problems) http://www.kb-silvolite.com/page05.htm http://www.kb-silvolite.com/speclear.htm#CHART http://Parts@sallee-chevrolet.com/Cylinder_Heads/Vortec.html hypereutectic pistons are fine at that hp level Quote Link to comment Share on other sites More sharing options...
Guest polarity Posted November 20, 2002 Share Posted November 20, 2002 grumpy, from your input. how much hp/torque do you think this engine will make? Billy Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted November 21, 2002 Share Posted November 21, 2002 the computer says if you install the cam 6 degs retarded to take full advantage of the flow it should make 378hp/398tq Quote Link to comment Share on other sites More sharing options...
Guest polarity Posted November 21, 2002 Share Posted November 21, 2002 wow, more hp than I was looking for, but less torque. how does one make a motor have more torque? Billy Quote Link to comment Share on other sites More sharing options...
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