[tcom]

Looking for any advice on a cam choice for my 72 TA 455HO build. Car is 4spd, AC, PB ,3.42 rear. Going with edelbrock aluminum heads , about 10:1 compression, stock intake , carb and exhaust. Not racing but looking to build a stout street motor with smooth idle and run on pump gas. Would consider HFT or roller. Any advice appreciated

[steve25]

So you do not have the original 7F6 heads that would have been on the motor?

The stock heads with HRC and running like .550” lift by means of 1.65 rockers can make you a easy 450 hp and have great street manor’s with only a 9.5 compression.

[track73]

I have nothing but praise for the 041 cam in my .030 over 455. with 1.6 rockers and Rhodes lifters.

[tcom]

My original 7F6 heads have some cracks on the exhaust flanges . I'll get them repaired at some point but for now went with the Eheads to just enjoy driving the car

[PAUL K]

Getting the right cam can make or break a combination. There is a guy local to you named Richie Hoffman, he has a life time of experience building and racing Pontiacs of all sorts. Reach out to him on Face Book or PM me and I will give you his phone number. He can help you!

[leeklm]

Since you are using aluminum heads, I would check out something like the "stump puller" hyd roller from SD Performance. Hard to go wrong with that cam in a 455. They also offer a more Performance oriented version called "old faithful". Still has good vacuum for brakes and a decent idle.

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[Steve C.]

Keep in mind the Edelbrock heads will flow right up thru .600" valve lift, keep that in mind with the cams valve lift. Example a 0.407" lift cam will not 'cut the mustard' here !

That and the spring choice with the 1.800" installed height.

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[tcom]

Thanks for all replies. Stump puller from SD perf. is not available. Any thoughts on the Butler/comp 8021 HRC , 224/230 503/ 510 114 LSA. ?

[promptcritical]

I’d be looking at a bigger cam with the CR and CID you’re going to have. Old Faithful would be fine with your setup. I have a 9:98:1 455 with ported 7F6 heads with a cam close to the OF on a 112 LSA, and it’s well behaved. A slight lope at idle and drives great. I’ve got a converter that Cliff recommended for me. Runs good. That Butler cam seems small for that motor. It would make some bottom end though.

[Steve C.]

A fwiw tid bit, the 'Stump Puller' is nothing more than Comp lobes 3111B & 3122B ordered with a 112 lobe separation and 5 degrees advance ground into the cam. Order it thru any Comp dealer. The 'revised' stump puller is Comp lobes 3194 and 3196, again custom ordered with a 112 lobe separation.


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[leeklm]

Originally Posted by Steve C.

A fwiw tid bit, the 'Stump Puller' is nothing more than Comp lobes 3111B & 3122B ordered with a 112 lobe separation and 5 degrees advance ground into the cam. Order it thru any Comp dealer. The 'revised' stump puller is Comp lobes 3194 and 3196, again custom ordered with a 112 lobe separation.





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I could be wrong, but believe the issue is the availability of the comp cores used for the stump puller.

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[Steve C.]

That's a good possibility. Comp uses steel billet cores for both their hydraulic roller and solid roller cams and there is often shortages from the two main sources of cam cores, both are located in Michigan. Engine Power Components and Camshaft Machine Company. Not long ago I called Bullet Racing Cams and they had no blank cores on hand with the specific Pontiac journal diameter. However they did have some new cams already made on hand that could be re-ground under some circumstances. One might call them. They have hundreds of lobe s to offer and could come close in the specs desired, enough so you could not tell the difference once installed in the engine.



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[Dragncar]

If you are putting E heads on a real 455 HO I say, why ? Street engine ?
If the engine has E heads its just a 455 with E heads same as if the engine came in a station wagon. Nothing special, the HO heads make it special.
IMO with what you are doing you will not gain anything with the E heads if you do a little work to you HOs. Nice port job with the right hyd roller and you are set.
I have beaten many 455s with E heads. It can be done.

[Stan Weiss]

Originally Posted by tcom

My original 7F6 heads have some cracks on the exhaust flanges . I'll get them repaired at some point but for now went with the Eheads to just enjoy driving the car

Originally Posted by Dragncar

If you are putting E heads on a real 455 HO I say, why ? Street engine ?
If the engine has E heads its just a 455 with E heads same as if the engine came in a station wagon. Nothing special, the HO heads make it special.
IMO with what you are doing you will not gain anything with the E heads if you do a little work to you HOs. Nice port job with the right hyd roller and you are set.
I have beaten many 455s with E heads. It can be done.

Asked and Answered.

Stan

[PAUL K]

Originally Posted by Dragncar

If you are putting E heads on a real 455 HO I say, why ? Street engine ?
If the engine has E heads its just a 455 with E heads same as if the engine came in a station wagon. Nothing special, the HO heads make it special.
IMO with what you are doing you will not gain anything with the E heads if you do a little work to you HOs. Nice port job with the right hyd roller and you are set.
I have beaten many 455s with E heads. It can be done.

Originally Posted by Stan Weiss

Asked and Answered.

Stan

Duh!

[PAUL K]

Originally Posted by Dragncar

.
IMO with what you are doing you will not gain anything with the E heads if you do a little work to you HOs. Nice port job with the right hyd roller and you are set.
I have beaten many 455s with E heads. It can be done.

Seriously? Two points of compression, 50 cfm of additional air flow, a better combustion chamber, more efficient exhaust port and fifty pounds off the front of the car.... No gain?? You did catch the point of this thread that the OP is not using the original .407 lift cam?

[Tim Corcoran]

tcom

You mentioned you would be using the stock exhaust I assume you won't be running headers and using the stock exhaust manifolds. If that is the case then that needs to be considered when selecting a cam. In that case make sure that you have a wide LSA like 114 and if all you want is a stout 455 that is easy to do with a flat tappet or a hyd roller. Because you have pretty good flowing heads do you want to take full use of the airflow or do you just want a stout 455 with a smooth idle? You will get so many recommendations asking for cam advice on this board it will make your head spin. I recommend you go to a professional and buy the cam from him. Tell him your combo and what you expect from the car and let them get a cam that will meet your needs.

[tcom]

Any thoughts on the Crower :
60916 221/229 455/470 112
60919 231/240 470/470 112
60243 228/235 479/494 112

[Steve C.]

Cliff Ruggles can correct me here, but if memory serves me right he used Comp lobes 3315B and 3316B ground with a 112 lobe separation. This on a pretty much stock Super Duty engine build, low compression around 8.5-8.8, nice idle and good vacuum. I believe it produced 457 hp at 5200 rpm.

This does not represent any endorsement for these specific lobes for the OP here, offered more to point out the amount of intake duration used. And the valve lift.


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[PAUL K]

Originally Posted by tcom

Any thoughts on the Crower :
60916 221/229 455/470 112
60919 231/240 470/470 112
60243 228/235 479/494 112

60916 poor choice

60919 Antiquated grind would work okay with 1.65 rockers

60243 Would work best with more rocker ratio on the intake side than the exhaust, but over all not a good choice.

See post#5