Ported heads with stock cam?

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Jul 6, 2006 | 10:26 PM

#21

MeentSS02

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From: Dayton, OH

Along these same lines, how much would you want to mill the heads on a stock cammed setup...I guess I don't know what the DCR is stock, so I wouldn't know what it would go up to with milling.

Jul 6, 2006 | 10:40 PM

#22

Patrick G

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Stock DCR with 98-00 cam is around 7.0:1

You can mill to 59cc and still stay not approach 8.5:1 DCR with stock cam. Milling is a great idea when doing heads-only.

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Jul 6, 2006 | 10:48 PM

#23

MeentSS02

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From: Dayton, OH

Wow...didn't know stock DCR was that low...is it the same for the 01-02 cams?

Jul 7, 2006 | 07:22 AM

#24

Patrick G

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From: Victoria, TX

Quote:

Originally Posted by MeentSS02

Wow...didn't know stock DCR was that low...is it the same for the 01-02 cams?

I don't have the exact stock cam specs of the '01-02 cams, but I would expect them to have higher DCR (because of shorter duration and narrower LSA).

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Jul 7, 2006 | 08:42 AM

#25

RaNsOm

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Quote:

Originally Posted by 2000TransAmWS6

while i would agree with you that you can add a "stealth" cam and pick up your power alot more, i would have to disagree that the main benefit of the heads are lost with a stock cam. just because you're not getting to the peak flow of the heads doesn't mean that they're not able to help make alot more power. with a set of aftermarket heads your flow is also increased at the lower lift values (.200+) and you're essentially able to fill the cylinders with air and fuel easier. so essentially the main benefit of the heads are still being used, just that they are not used at the peak flow.

well, true. i should have phrased it differently. but yes your right, more 'power under the curve' is made with the increase in flow numbers at low lift as well.

Jul 7, 2006 | 09:41 PM

#26

mrr23

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From: orlando, fl

i did heads only on the wife's car. picked up 37 rwhp. drove and sounded like stock. just with the added hp. yeah yeah, more expensive than doing a cam only. to each their own.

before/after head swap stock tune

then tuned with the VHP tuner

Jul 8, 2006 | 08:28 AM

#27

vettenuts

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From: Little Rhody

I considered going this way for a long time, and was going to go with the Crane 1.8 rockers rather then the cam change. I spent a lot of time looking into it and thought it was a good way to go.

Mar 15, 2022 | 07:02 PM

#28

corvettestar

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Quote:

Originally Posted by Patrick G

Swapping to a

Hi I’m also considering only heads c5 , can you help me on which heads would be the best choice? So many options I can’t figure it out . I know post is old but please help me out thanks

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Mar 15, 2022 | 07:07 PM

#29

01CamaroSSTx

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From: Conroe, Texas

Haven't seen Pat G on here in awhile but for cylinder heads I'd contact Texas Speed and Performance and see what they can do for you on a factory casting or maybe go for their PRC castings.

Mar 16, 2022 | 01:03 PM

#30

grinder11

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Quote:

Originally Posted by corvettestar

Hi I’m also considering only heads c5 , can you help me on which heads would be the best choice? So many options I can’t figure it out . I know post is old but please help me out thanks

Better to start a new thread. This one was 16 years old........

Mar 16, 2022 | 02:08 PM

#31

99 Black Bird T/A

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Quote:

Originally Posted by corvettestar

Hi I’m also considering only heads c5 , can you help me on which heads would be the best choice? So many options I can’t figure it out . I know post is old but please help me out thanks

With the small under sized stock cams, I don't think it will make all that much difference in which set of quality ported heads are selected.

ultimate-chevrolet-ls-cylinder-head-test notice how closely the majority of the heads performed in the test.

I'd favor a set of ported 5.3 heads by Total Engine Airflow or Texas Speed & Performance as best bang for the buck.

Next a set of ported LS6/243/799's Total Engine Airflow or Texas Speed & Performance.

If budget is bigger a nice set of Trick Flow's.

Even a little cam like a Lingenfelter GT2-3 will gain another ~30whp to 35whp in addition to the gains for ported heads and basically drive like stock.

Last edited by 99 Black Bird T/A; Mar 16, 2022 at 02:15 PM.

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