Need new heads and cam - Team Camaro Tech
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post #1 of 6 (permalink) Old Sep 6th, 03, 08:00 AM Thread Starter
 
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This is for my 71 Camaro with a 85 350 truck engine.The car has to org.smogger heads(junk)I think I want to go to the vortec's,cost being the main factor.This car is my daily driver and I don't race it.Right now other than stock internals it has a Holley street avenger intake with a Holley 650 carb,headers/flowmasters.My questions are,what kind of hp/torque gains can I expect from the vortec's,also what cam would you recomed?I want my power in the low to mid range and I don't want to have to change my stock convereter.Does anybody have a part#/casting# for the heads and about how much I should expect to pay for the heads.I do know that I will have to change the intake also.How about the air gap?
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post #2 of 6 (permalink) Old Sep 8th, 03, 10:52 AM Thread Starter
 
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ttt
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post #3 of 6 (permalink) Old Sep 8th, 03, 01:09 PM
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John
 
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if you go with the vortec heads, you'll also need to get center bolt valve covers in addition to the dedicated intake manifold. If you go with a cam that has some lift to it, you may also want to have the heads machined for screw in studs, and matched valve springs are always a good idea. There are some hidden costs basically...

They are a good head though, and if you're going with a mild-mannered combo on the street as you describe, the heads will probably be a good deal for you.

Check out Sallee Chevrolet, or Scoggin Dickey Performance Chevy for a full kit that includes the heads with all the gaskets, intake, valve covers, and self-aligning rockers that you'll need (if you don't have them already). The kit comes out to around $700 last time I looked.

As for a cam, Something with less than 220 degrees duration @.050'' lift is a good choice. The Vortec head's don't have the best exhaust port, so a dual patterned cam may be beneficial. Something like the Comp XE262, or XE256.

Another thing you'll need to consider when swapping the heads is the compression ratio change. If you have old 76cc chamber heads, the vortecs have 64cc chambers which will boost your compression quite a bit.

Just a rough guess... I'd say a swap to the Vortec heads would probably be worth 30+ horses over some old 882 castings. With the Comp XE262 cam, 350 horses wouldn't be impossible.

You may want to look back at an old article they had in Chevy High Performance Magazine about the Vortec heads... With the XE268 cam they managed to get 400 horses out of their test 350.

John

- '68 Chevy Camaro (sort of done, but always subject to improvement)
- '63 Pontiac Tempest (work in progress)
- '72 Datsun 240-Z (back-burner for now)
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post #4 of 6 (permalink) Old Sep 8th, 03, 04:47 PM
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My brother is runnig a 78 Camaro with a 350, stock Vortec heads and the Comp Cams XE268 with, Edelbrock 650, crossflow Flowmaster exhaust. He loves it, nice idle good power and he drives it almost daily.
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post #5 of 6 (permalink) Old Sep 8th, 03, 09:09 PM Thread Starter
 
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Ok,guys,I went and ordered the kit from Scoggin/Dickey.It was onlt $21.75 for shipping/handling.The kit is ready to bolt on with a new airgap intake,heads,all gaskets and bolts.Everything out the door $861.00.Well see what happens
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post #6 of 6 (permalink) Old Sep 9th, 03, 09:57 AM
 
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i have a set of Dart iron eagles for sale. 180 cc intake 64 cc chamber with manley 2.02 -1.60 valves, and more these have 300 miles on them. New their $900 i'll take $600.

if interested i can send pic's
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