502 crate upgrades (need some advise) - Team Camaro Tech
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post #1 of 5 (permalink) Old Apr 6th, 11, 07:00 AM Thread Starter
Kris Boutilier
Join Date: Feb 2011
Location: Nova Scotia Canada
Posts: 20
502 crate upgrades (need some advise)

Hello, thanks for all the other answers everyone has given me lately.

I have a 2007 built 502 HO that is all stock but the camshaft. It is installed in a 1967 camaro. The camshaft is a comp with 230/236 283 duration. Grind number XR282HR-10. The stock HO comes with iron rectangular heads. This car is mainly driven on the street. The car burns a very excessive amount of oil (1 litre per under 200 miles) I do not like the way the iron rectangular heads handle for street use. The 502 HO comes stock with 450 HP and I think about 550-560 tourque.

I am looking to spend about $2500 to $3000 to fix the oil problem and get some more streetable power. This budget will include labor from machine shop. I have been told on here that the rings need to be changed and cylanders plate honed to fix the oil problem and that I should change my heads to a set of 110 aluminum oval heads.

With that said, I am wondering what kind of rings (manufacturer and model) what kind of aluminum oval heads (manufacturer and model)? What to ask the machine shop to do since they will have engine apart to install rings? Also by changing the heads do I buy the heads bare and use my valves and springs or do I buy them assembled. What other components will I need to do this upgrade. (new pistons, rods etc....) Looking for the best bang for my buck to get an engine that burns min oil and has great streetable power and drivability.


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post #2 of 5 (permalink) Old Apr 6th, 11, 08:17 AM
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Join Date: Jan 2005
Location: 2 Dog Town in West Texas
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Re: 502 crate upgrades (need some advise)

From what I have learned on those HO BBC motors, you will have the issue of burning a little oil , not a smoker car like Uncle Bucks though. Just how bad is oil consumption? 1 qt every 1k miles?

Sounds like you will be spending a lot of money vs. going to a more streetable motor?

I do understand the oil burn problem and have done some old time ring seating with a cup of Marvel oil and a couple of teaspoons of Bon Ami, the house hold cleaner. Its used to score up the cly walls to get a wear pattern and ring seat. You could also have the option of just changing rings to a moly type and break the wall glaze with a ball hone. Of course its not as good as hone plate boring but do you really need this?

The head issue can be expected. I have heard the oval port heads are best for a street car.

I personally would look for another motor to work with, you have a good crate motor but by time you do all this work , you may have just a stock 454 or so.

Lets see what the others say, this is just my first hand 2 worth.

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Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968

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post #3 of 5 (permalink) Old Apr 6th, 11, 11:11 AM
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Re: 502 crate upgrades (need some advise)

Get with Chris Straub @ Straub Technologies. He will set it up with what u need...proven setups.

71 Chevelle 496 Stroker Hyd Roller 675HP, TH400 3500 Stall, 3.73 12 Bolt.


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post #4 of 5 (permalink) Old Apr 6th, 11, 07:02 PM
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Location: Nashville TN
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Re: 502 crate upgrades (need some advise)

The aluminum "110" heads are edelbrocks. The 110 is the size of their semi-open combustion chamber. Cost is $1500 ready to go.

Are the pistons cast or forged? If they are cast you can probably get away with not boring .030 oversize; just replace them with forged pistons and hone with a torque plate to get the correct piston-to-wall clearance.

With the cam you have and running 10.5-1 compression, that engine will be a blast to drive !
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post #5 of 5 (permalink) Old Apr 7th, 11, 05:23 AM
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Join Date: Jan 2001
Location: Lubbock, TX USA
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Re: 502 crate upgrades (need some advise)

Stock bore is 4.468, may be able to get it to clean up at 4.470 or so...you might get lucky enough to find a shelf piston. I've found several sets of 454 +.005's that were made for the same situation on crate 454's.
I grew up on an irrigated farm, all we used were 427's. They ran 24-7, generally around 2K, drank a quart a day, every day. Way back then when people could be trusted, Dad had the local oil company deliver a case of quarts to each engine as they needed it, left 'em in a metal box to keep 'em out of the weather. It was kinda like Schwann's for Chevys, he'd check 'em on a weekly basis, did the same for all the farmers in the area.

Gary Adrian
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