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Discussion Starter #1 (Edited)
Hello, I have a 1967 Camaro with a 502 HO installed in it. I have a comp cam installed, (not stock with the 502HO, see cam specs below). The 502HO comes stock with iron rectangular heads. I was wanting to change out the iron rectangular heads for oval aluminum heads for better streetable power. Which type of aluminum oval heads and intake would work best with my application. Which type of aluminum oval heads and intake are the best bang for my buck.

The 2007 built 502HO burns alot of oil. Around a litre every 250-300 miles of highway driving. What can I do about this?

comp cams part number 12-432-8
duration at .05" 230 intake and 236 exhaust
 

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There has been a lot of discussion about these engines and the 454HO using oil...if I recall correctly there were "ring issues"....check on the Team Chevelle site for discussion about this. As for heads...I would recommend the Edelbrock Oval Ports with the 100cc chambers...this will kick up the compression by about a point and provide better street performance. You will need a new intake...the RPM Airgap is a good choice here. Those iron rect. port heads just don't fit on the street with the low compression pistons.

I have the 454HO in a 68 Nova...Eddy heads, rpm airgap, Holley DP, and the 502 factory cam...it works well and makes good power....fortunately no oil problem.

You should address the oil issue first...good luck.

wilma
 

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Wow 2007's still burn oil???

The 100cc Eddy's will actually bump the compression almost 2 points, as the iron heads are like 119cc. Eddy's have the new "E-street" head which is a little cheaper, like 1800.00 for the set. You will also need new heads bolts. If funds are available, the Brodix Race Rites are even better and will make more power than the Eddy's. Cam wise, I like the specs on that for a nice street 502. A cam with a little more lift would be even better like the Lunati 60622 231/239 .600 110lsa.

As far as oil burn, that's a tough one. If its from the rings, you may want to have the motor torn down, plate hone, and new ring set. That's what I had to do with my 454HO.
 

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Discussion Starter #5
What kinda of rings would you recommend. Also how many hours would it take a machine shop to tear down the engine and hone and install new rings. Would the E heads be better than the aluminum heads that come with the 502 ZZ. Here in Canada most garages only have a premium gas with an octane of 91 some which are hard to find have 92 octane. At what compression would I start to worry about knocking with this octane level.

Kris
 

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Forgot to mention something about the head swap...those rect. port heads have the non adjustable rockers...the Eddy heads will need adjustable style and perhaps different pushrods(not sure??)

You can get away with a little more compression with the aluminum heads over iron...wilma
 

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sideways is on it--10 to 10.5 is all you want on comp--you prob have 8.5 now--unless you have valve seal problem, i would do complete tear down
 

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Another option is a 540 kit. Can get a forged, balanced kit for around 2000.00. Not sure if the extra 40 cubes is worth 2000.00. but its an option.

But a good set of alum heads can be worth perhaps 100hp over the irons.

My 502 now has AFR305's, small 233/236 HR cam. Probably around 600hp, drives very very well. Makes 15" of vac at 900 rpms. Could probably run a 10 sec 1/4 mile if I could get the darn thing to hook-up.
 
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