[Dave M]

Originally Posted by rascal455ho

It came with lunati lifters , scorpion race rockers and a summit 9 key way timing chain .

That's exactly what I have in my 467. Same cam, lifters, and rockers. 9.4:1 compression too. Make 430hp @4900 rpm. And 542tq. Works well on the street. Car has gone 12.77@107 with a skinny bias ply in factory appearing stock tire race. Car has 3:31 gears and a th350 with a Hughes gm25 converter.

Also worth mentioning. My son has the same cam in his car with 1.65 rockers. And 3.73 gears. His car has gone 12.04@114. He has port d heads. I don't.


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[ponjohn]

Originally Posted by Dave M

That's exactly what I have in my 467. Same cam, lifters, and rockers. 9.4:1 compression too. Make 430hp @4900 rpm. And 542tq. Works well on the street. Car has gone 12.77@107 with a skinny bias ply in factory appearing stock tire race. Car has 3:31 gears and a th350 with a Hughes gm25 converter.

Also worth mentioning. My son has the same cam in his car with 1.65 rockers. And 3.73 gears. His car has gone 12.04@114. He has port d heads. I don't.


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Iron d-ports?

[blueghoast]

Originally Posted by rascal455ho

455. 9.4:1 compression 3:42 gears Found this cam on offer up think it will work? 3315B/3316B HR 112 +4.0.
281 in. 287 ex. 230in 236 ex @ .050 lobe sep 112. Lift 510 in 520 ex. Custom ground comp

I put a cam like this in a buddy's 406 that I built for him, It's got a little lump to
it and performes great. Haven't had it to the track yet, that'll be next
summer.
I'll have to look at the numbers on the cam box and let you know.
Good luck with it.

GT.

[Dave M]

Originally Posted by ponjohn

Iron d-ports?

Yeah we both have iron ports. Mine are #96. His are #62.


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[rascal455ho]

Sounds good Dave M

[rascal455ho]

Mine are 7K3

[Dave M]

Originally Posted by rascal455ho

Mine are 7K3

Should work great with that cam and flat tops. I would recommend having the push rod holes elongated so you can use 1.65 rockers if you get bored with it and want me power as time goes on. I wish I did.


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[HWYSTR455]

Originally Posted by JLMounce

I run the Lunati lifters in my 455. If I had to do it over again, I'd get the new Comp lifters. These do clatter slightly at idle when the car warms up and the oil pressure drops to about 15psi. These really need to see about 20 psi to keep quiet and continually pumped up. Off idle, they're fine and I haven't had any issues with them.

If your engine keeps a bit higher idle psi, they'll probably work well for you. If not, I'd consider the purchase of the comp lifters as suggested.

And this is one reason why Butler and a couple other builders recommend an 80 psi pump.

Funny thing is, the folks that say not to run an 80 pump, shim the 60 pumps to 70 psi, which is the general area the 80 pumps run at.

Just saying...

.

[Tom Vaught]

Originally Posted by HWYSTR455

And this is one reason why Butler and a couple other builders recommend an 80 psi pump.

Funny thing is, the folks that say not to run an 80 pump, shim the 60 pumps to 70 psi, which is the general area the 80 pumps run at.

Just saying...

.

Why is it that for years and years, early 60s time frame, the Pontiac ran 40 psi springs and oil pumps and the lifters never clattered or made noise.

So now we need 80 psi pumps to keep the lifters from clattering at idle?

Fix the lifters, don't add a bigger oil pump to try to bandaid the poor lifter quality.

Tom V.

[HWYSTR455]

Originally Posted by Tom Vaught

Why is it that for years and years, early 60s time frame, the Pontiac ran 40 psi springs and oil pumps and the lifters never clattered or made noise.

So now we need 80 psi pumps to keep the lifters from clattering at idle?

Fix the lifters, don't add a bigger oil pump to try to bandaid the poor lifter quality.

Tom V.

One reason is what I mentioned, another reason is bigger bearing clearances. But yes, I agree, fix the lifter problem. But the manufacturers are looking at target audiences, and a 'low' audience isn't a wise business choice.

Again, most shim the 60 pump to get 70 as SOP, and that is basically what the 80 pumps run at psi-wise. So what's the difference?

.