LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Question about cc503 and stock heads

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Old Apr 24, 2009 | 12:47 AM
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Default Question about cc503 and stock heads

Does anything need to be done to the heads to support a cc503 cam? According to comp cams website it requires machining on cylinder heads.
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Old Apr 24, 2009 | 01:01 AM
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Lots of people are running the 503 on stock heads with no problems. There is a wealth of info on-line about the 503 cam. Just gotta do a little research.
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Old Apr 24, 2009 | 01:05 AM
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I love that cam i my car. You don't do anything to the heads except put in new valvesprings.
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Old Apr 24, 2009 | 01:09 AM
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No you don't need headwork to run the 503. I've ran the 306 with untouched heads, no problems. You'll be fine.
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Old Apr 24, 2009 | 01:11 AM
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thanks.
I read a lot about the cam, and read the cam guide. I was just double checking sense right on the website it says its "required". http://www.compcams.com/Cam_Specs/Ca...csid=1107&sb=2
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Old Apr 24, 2009 | 01:11 AM
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Originally Posted by porksoda
I love that cam i my car. You don't do anything to the heads except put in new valvesprings.
What kinda hp numbers do you think your putting down? I'm starting my 503 swap in May and just curious. Not trying to hi-jack the thread.
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Old Apr 24, 2009 | 01:14 AM
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Originally Posted by justinflora
thanks.
I read a lot about the cam, and read the cam guide. I was just double checking sense right on the website it says its "required". http://www.compcams.com/Cam_Specs/Ca...csid=1107&sb=2
I would be curious to see the difference in hp numbers on a stock vs worked head with the 503 cam.
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Old Apr 24, 2009 | 10:53 AM
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you dont NEED them worked, but as with any cam swap porting the heads will give you much better gains in the end than restrictive heads
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Old Apr 24, 2009 | 11:21 AM
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I ran that cam with stock heads for awhile and it was a great setup. No head work is required but it's always beneficial in the power department.
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Old Apr 24, 2009 | 11:52 AM
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Another CC503 w/ stock heads here...I love my set up. Lots of power everywhere. You won't go wrong with that cam, just be sure to get some quality valve springs and you'll be good.

I have:
CC503
Crane 10308 dual valve spring kit
Comp 1.6 NSA 7/16" Pro Mags
TF guideplates
ARP 7/16" rocker arm studs
TF 7.2" chromemoly pushrods

Match that up with LT headers, exhaust, and a CAI and you'll have a nice cam-only performer.
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Old Apr 24, 2009 | 03:31 PM
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Originally Posted by ss.slp.ls1
Another CC503 w/ stock heads here...I love my set up. Lots of power everywhere. You won't go wrong with that cam, just be sure to get some quality valve springs and you'll be good.

I have:
CC503
Crane 10308 dual valve spring kit
Comp 1.6 NSA 7/16" Pro Mags
TF guideplates
ARP 7/16" rocker arm studs
TF 7.2" chromemoly pushrods

Match that up with LT headers, exhaust, and a CAI and you'll have a nice cam-only performer.
x2 You wont be dissappointed with that cama and stock heads
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Old Apr 24, 2009 | 04:08 PM
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Lunati dumdumdum
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Old Jan 30, 2010 | 08:58 PM
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How much HP gain do people usually gain from a cam only cc503 lt1 car? tuned?
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Old Jan 30, 2010 | 10:02 PM
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Originally Posted by JwMonE99
How much HP gain do people usually gain from a cam only cc503 lt1 car? tuned?
Ive seen 330 with a stalled auto.. prolly 345 with 6spd which is excellent cam only I think..

I was on the search for the 503 till I got my cam..
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Old Jan 30, 2010 | 11:08 PM
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This is the first XE503 thread I've seen in...idono, 2 hours.

How come no one searches this stuff?

-Dustin-
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Old Jan 31, 2010 | 02:43 AM
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No dyno numbers yet. MadTuner mail order tune. I did manage to trap 87.20mph in the 1/8 mile.
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Old Feb 6, 2010 | 03:35 PM
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Originally Posted by ss.slp.ls1
Another CC503 w/ stock heads here...I love my set up. Lots of power everywhere. You won't go wrong with that cam, just be sure to get some quality valve springs and you'll be good.

I have:
CC503
Crane 10308 dual valve spring kit
Comp 1.6 NSA 7/16" Pro Mags
TF guideplates
ARP 7/16" rocker arm studs
TF 7.2" chromemoly pushrods


Match that up with LT headers, exhaust, and a CAI and you'll have a nice cam-only performer.
Correct me if im wrong but, you can use all these same parts for the CC306 cam right? Except im thinking about going with pac 1218 springs and CC pushrods part #7940-16.
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Old Feb 6, 2010 | 06:34 PM
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Originally Posted by 93BlackZ28
Correct me if im wrong but, you can use all these same parts for the CC306 cam right? Except im thinking about going with pac 1218 springs and CC pushrods part #7940-16.
Yes absolutely. The 1218's are awesome springs, good choice. Just grab the TFS pushrods since they are cheaper IIRC.
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Old Feb 6, 2010 | 07:28 PM
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Does it matter wether I get 7/16 stud or 3/8 stud rockers?

EDIT: nevermind, I did a search and 7/16 is the way to go.
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Old Feb 7, 2010 | 02:04 PM
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Originally Posted by 93BlackZ28
Does it matter wether I get 7/16 stud or 3/8 stud rockers?

EDIT: nevermind, I did a search and 7/16 is the way to go.
Yeah, 7/16" is the way to go.

And as stated above, get the TFS pushrods. They are only 87 bucks from Summit.
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