I Have A 1986 Olds 442 With A 355. Stock bottom end except for flat top 4 valve relief pistons. I have a Lunati 60103 cam .489/.504 268/276 but with a 108 LSA. I am looking for the aftermarket vortec heads. I currently have the 062 heads, but they are made in mexico and I believe the intake runners are 150ish instead of 170cc. I am looking at the RHS vortecs and the Patriot 185cc vortecs. I cannot decide on which ones to buy. Wondering If any of you guys would have any experience or shed some light on my situation. Thanks, Your suggestions will be greatly appreciated.
Honest Opinion On Which Vortec Head To Buy
- Thread starter cutdoggin442
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Stock vortecs have a 170cc intake runner. That cam has more lift than stock vortecs can handle unless you buy the special valve springs from comp cams or have the spring side opened up and the guide trimmed down. Between the two you listed I would probably pick the RHS heads. I have heard nothing but good things about them. I've heard mixed reviews with patriots. Honestly though, depending on your goals I would buy something else other than those. It all depends on what your doing but there are better heads in the same price range.
don't forget about the GM bowtie vortec heads--they are made for aftermarket/higher lift cams, have bigger runners etc.
BUT, i have a 383 with a similar cam (xe274) and stock vortecs, except for having the valve guides done. they work fine. low end torque is insane and she pulls through the top end too.
BUT, i have a 383 with a similar cam (xe274) and stock vortecs, except for having the valve guides done. they work fine. low end torque is insane and she pulls through the top end too.
Thanks for you input. The 062 Vortecs I currently have have .550 lift springs and the guides cut down to help with retainer to guide clearance. I really like the Vortec cylinder heads because of the combustion chamber design. For an iron head you can have a little more compression and not worry about detonation. With my bottom end, depending on what my deck clearance is, with the 64cc I should be around 9.5-10.1. I already have a Weiand Air-Strike Speed Warrior Vortec style intake and center bolt valve covers. Any other Vortec style heads y'all suggest? The RHS Pro Torkers are $799. The Patriot 185s are $735. I have looked at the Summit style Vortecs, but they are 67cc and are really just a standard Dart head with Vortec style combustion chambers and Vortec style intake mounting. Thanks
i'm guessing you want to go big?
http://www.summitracing.com/parts/NAL-25534445/
or small?
http://www.summitracing.com/parts/NAL-25534351/
http://www.summitracing.com/parts/NAL-25534445/
or small?
http://www.summitracing.com/parts/NAL-25534351/
Once I remove the current cylinder heads I should be able to figure out the compression ratio. With the 4-valve relief pistons and the 64cc I would like to be around 10.1 CR. I have a decent cam in the engine now, I just don't know the specs. I want a radical sounding cam with more exhaust lift/duration for the Vortecs lacking exhaust flow. I really like the 60104 Lunati cam, but i don't want it affecting my power brakes, etc. I would like to make at least 350hp preferably 400hp. at least 375 400tq. I have a Holley 670 S.A. That can be jetted up, add the correct power valve, and secondary spring. I have a Pertronix Flame Thrower H.E.I.distributor I can adjust the vacuum advance springs/weights accordingly. I am getting Lonnie from Extreme Automatics to build me a Th-2004R with at least a 2500 stall for the camshaft. My rear end is a 3.73 posi with 26'' tires(235/60-15). The governor will be at 5200 W.O.T. shift points. I'm really only interested in Vortec style heads for this build. This car will be a street /strip car. I'm sure you all have the same thing in mind for your street vehicles. Sorry so long just don't know which head to buy. Basically with whatever cam and head I choose I want the most power potential up to 6000rpm.
Good timing on this thread im looking for vortecs right now for my 400. I cant seem to find a solid answer on the good vs the bad stock vortec heads so I have been looking aftermarket alittle.
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