Vortecs not great out the box?

EOD AIRFORCE · 03-30-2005, 12:32 PM

I was about to buy some vortec heads and a Performer intake. I found this place that sells a kit, but I'm kinda having doubts of whether they're worth it cuz i heard that some of these heads don't have good springs? Not sure if that was just on stockfrom a car or stock from the manufacterer. What do you guys think, are these ok?? I'm going for something I can still drive daily, but not sacrifice too much power. I Thanks

Heres the link. proly have to cut and paste.
http://www.sdpc2000.com/catalog/2172...-Head-Kits.htm

89IROC&RS · 03-30-2005, 02:31 PM

the problems you are talking about referr to the factory heads off of the L31 equipped trucks. These heads have large valve guides that limit lift to around .450-.480 and dont allow the use of dual springs. Also the 908 castings off of some box trucks have pressed in steel exhaust valve seats that limit flow.

These heads are excellent budget performance heads, i have a pair myself that i plan on using on a 450hp 302cid small block. The thing to look for is if youre getting your heads from a junkyard, get the ones that have casting numbers ending in 062, and use a dual pattern camshaft because the vortec intake port flows more air than its exhaust port, so youll need a cam that favors the exhaust. If you plan on running a high lift cam, with factory heads, comp cams has a beehive spring that will allow you to run higher lift, or you can have the valve guides machined down to allow the use of higher lift and dual springs.

The heads you are looking to order from SDPC have more than likely already had all of this done, but i would email their support staff to make doubble sure.

89IROC&RS · 03-30-2005, 02:32 PM

oh and do a search on the forum about vortec heads, and im sure youll find plenty of threads about them. In one of those threads i gave the part number for those beehive springs, i dont remember it off the top of my head.

EOD AIRFORCE · 03-30-2005, 02:53 PM

Thanks alot for help. For a second I was stopped in my tracks. I'll go ahead nd ccontact them right now as a matter of fact. Thanks again

89IROC&RS · 03-30-2005, 02:57 PM

no worries, also, do that search like ive suggested, there were several threads where we discussed in depth the pros and cons of these heads.

EOD AIRFORCE · 03-30-2005, 03:07 PM

Will do boss. thanks

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