just want some reassurance on combo choices

[Maniacmechanic1]

Its not going to beat a Hellcat.
He never stated Street Race to Win.
Pump gas.
Wants Race Car real sound.

Having both without Real Race gas risky.
Blow up.

 

[Strictly Attitude]

I know the reliefs are 5cc into my piston. Let's get more facts on actual set up Christopher what is the actual specs here we have heads just need the actual piston reliefs and the deck is it zero decked? Is it a 6" rod?

 

[Strictly Attitude]

Thumper cams high overlap lift limited

 

[Maniacmechanic1]

Thumper cams high overlap lift limited

One of the worst cams ever made.
Designed for Pro Tour Old Dead Man Racing.
Pull up to a car show look good.
DD2000 a Thumper cam for the Pontiac guys.
Made almost 100 Hp less than a 067 Pontiac stock cam in a 400 and 455.

 

[Grumpy]

Brian...on the fact that many of the THUMPER series cams were less than impressive we are in full agreement
but to be fair they were never designed to run well or make decent power their whole reason for existing,
was so want-to-be race car owners could idle through the local burger joint parking lot,
and have a loud and lopey idle exhaust sound... no other characteristic mattered,
I had heard that comp cams limited or stopped selling the thumper cams lines as word got out as to how pitiful the cams power curves were.

 

[Christopher Williams]

I know the reliefs are 5cc into my piston. Let's get more facts on actual set up Christopher what is the actual specs here we have heads just need the actual piston reliefs and the deck is it zero decked? Is it a 6" rod?

Yes, true zero deck. 6.0 rod. 2618 pistons. True 5cc relief, true 72cc chamber. Verified. 2.08/1.60 profiler 210cc runner. Gasket matched to 1206 felpro. .030 mls cometic gasket. Carb undecided. Cam undecided. Full body 69 Camaro. M-21 with the higher 2.20:1 first gear. 3.42 rear. 28" tire.

 

[Christopher Williams]

Brian...on the fact that many of the THUMPER series cams were less than impressive we are in full agreement
but to be fair they were never designed to run well or make decent power their whole reason for existing,
was so want-to-be race car owners could idle through the local burger joint parking lot,
and have a loud and lopey idle exhaust sound... no other characteristic mattered,
I had heard that comp cams limited or stopped selling the thumper cams lines as word got out as to how pitiful the cams power curves were.

Agree also. I don't even like the choppy sound. I tried one. Ran it for a week. Motor cam back out for a cam change shortly after

 

[Christopher Williams]

7.891 on the above grumpy camshaft on grind 119651 as posted will run some ea simulations tonight need read info on combo. Too many open variable. Need real header size and exaust if running. Intake air gap and single plane will run then will excel info on graph. Let number speak including a whole curve to compare. Will make good discussion.

Real header size if a full length 1.75" primary Doug's headers. 3" collector. X pipe with two chamber flowmasters

 

[Christopher Williams]

Allot thrown around in here but need to group info in one post make easy to pick through pump gas only combos 8.3 and under dynamic aim 8.2 range using advance will be used at my discretion. Dyno sim will run 2000-7000rpm. Need Carb info also. Christopher, Brian, and Grumpy post cam cards you want to see. I will do the rest tonight.

750hp Holley

 

[Maniacmechanic1]

Yes, true zero deck. 6.0 rod. 2618 pistons. True 5cc relief, true 72cc chamber. Verified. 2.08/1.60 profiler 210cc runner. Gasket matched to 1206 felpro. .030 mls cometic gasket. Carb undecided. Cam undecided. Full body 69 Camaro. M-21 with the higher 2.20:1 first gear. 3.42 rear. 28" tire.

What pistons do you have ?
Brand and part number ?

 

[Christopher Williams]

Yes, true zero deck. 6.0 rod. 2618 pistons. True 5cc relief, true 72cc chamber. Verified. 2.08/1.60 profiler 210cc runner. Gasket matched to 1206 felpro. .030 mls cometic gasket. Carb undecided. Cam undecided. Full body 69 Camaro. M-21 with the higher 2.20:1 first gear. 3.42 rear. 28" tire.

Correction. .039 cometic. Auto-correct

 

[Maniacmechanic1]

Look like Racetech pistons ?

 

[Maniacmechanic1]

Correction. .039 cometic. Auto-correct

Fighting auto correct in my phone also.

 

[Christopher Williams]

What pistons do you have ?
Brand and part number ?

Custom made from wiesco. I'm at work. I don't have the paperwork with me

 

[Christopher Williams]

Look like Autotech pistons ?

Looks like a flat top with 5cc reliefs

 

[Strictly Attitude]

Grumpy I will take your selection of cam sheets please and Brian just the one Isky or any others you want?

 

[Strictly Attitude]

Chris any cam cards you want run also

 

[Christopher Williams]

View attachment 10693
But besides that let's just group the cams over lay them see what happens then let Chris decide I like Isky so does Brian Grumpy has his crane and crower favorites and Chris likes ? I like custom ground also.

Not opposed to a custom grind. I'd like to see the Crower 00471, like Rick's, the isky 558, grumpy's crane. I like the later intake closing, and throw in the 272/282 that runs on 87 octane

 

[Christopher Williams]

Not opposed to a custom grind. I'd like to see the Crower 00471, like Rick's, the isky 558, grumpy's crane. I like the later intake closing, and throw in the 272/282 that runs on 87 octane

 

[Christopher Williams]

Not opposed to a custom grind. I'd like to see the Crower 00471, like Rick's, the isky 558, grumpy's crane. I like the later intake closing, and throw in the 272/282 that runs on 87 octane