Big cam needed. What you got?
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 845
Likes: 54
From: Bangor, Northern Ireland
Big cam needed. What you got?
Hey guys.
I have an 11-1 c/r 383. Forged eagle rotator. 200cc Dart heads. Good stuff.
I’m bored of the current cam.
I want something really wild. Something angry.
current cam is
https://www.compcams.com/xtreme-energy-240-246-hydraulic-flat-cam-for-chevrolet-small-block.html
I find this cam tame. It’s a nice cam, but I want a real rumble. My Dad has a Howard’s cam 545” in his sbc 427 and that’s pretty rock n roll.
So, I’m happy to go roller or solid flat tappet.
I guess something with a peak of 7k.yes I know the heads aren’t really up for that but I can change them later,
I have an 11-1 c/r 383. Forged eagle rotator. 200cc Dart heads. Good stuff.
I’m bored of the current cam.
I want something really wild. Something angry.
current cam is
https://www.compcams.com/xtreme-energy-240-246-hydraulic-flat-cam-for-chevrolet-small-block.html
I find this cam tame. It’s a nice cam, but I want a real rumble. My Dad has a Howard’s cam 545” in his sbc 427 and that’s pretty rock n roll.
So, I’m happy to go roller or solid flat tappet.
I guess something with a peak of 7k.yes I know the heads aren’t really up for that but I can change them later,
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
You need to go to solid rollers for no rpm limitation. my stroker SBC's are 7500 rpm. Your heads are a limitation. I use a custom billet 236/242 with 112 on my 383 and now a 396. I went for the broadest power curve that is like 4000 rpm wide
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 845
Likes: 54
From: Bangor, Northern Ireland
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 845
Likes: 54
From: Bangor, Northern Ireland
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 845
Likes: 54
From: Bangor, Northern Ireland
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Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 845
Likes: 54
From: Bangor, Northern Ireland
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I have the 600 .64 od tranny with 4.11 rear end with 22 pound flywheel. Roller cams make more vacuum and low end TQ than flat tappets
My headlights/brakes always worked
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
The Erson cam list shows the Lobe Centers. Blower motors don't want intake reversion so they use 114 LC. I had my billet custom cams ground on 112 for the highest average power numbers and a broad power band. When you get to 110 LC or less gives you a higher peak TQ and then the engine drops off. The reversion because of overlap give the motor a rowdy idle like a race car for only operating in a narrow rpm range.
Street machines or dual purpose lapping cars need a 4000 rpm wide power band. I can use 5th gear over drive running around town
Street machines or dual purpose lapping cars need a 4000 rpm wide power band. I can use 5th gear over drive running around town
Race Director
Joined: Jan 2000
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
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Most roller cams actually have better manners than any flat tappet...and solid rollers are even better than hyd rollers usually. You can run a more aggressive solid roller and keep manners.
I did a 388" for a buddy with a custom 248* SR on a 107 LSA. That thing is sweet...sounds killer...will go 7K plus anytime and every time he drives it and is amazingly easy to drive even when he had the 3.36 gears in it with the 4 speed. He broke that rear and stuck in 3.70's now. It's a deep/low 11 sec car on plain BFG street radials.
JIM
I did a 388" for a buddy with a custom 248* SR on a 107 LSA. That thing is sweet...sounds killer...will go 7K plus anytime and every time he drives it and is amazingly easy to drive even when he had the 3.36 gears in it with the 4 speed. He broke that rear and stuck in 3.70's now. It's a deep/low 11 sec car on plain BFG street radials.
JIM
Race Director
Joined: Jan 2000
Posts: 13,018
Likes: 2,262
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
You ought to hear my 408" Clevor with the 8-71 blower on it. Has a 106* LSA solid flat tappet in it. Fires instantly, beautiful response.
Blowers purge the cylinder pretty well and can pump some raw fuel out the exhaust on overlap....but they still fill the cylinder.
JIM
Blowers purge the cylinder pretty well and can pump some raw fuel out the exhaust on overlap....but they still fill the cylinder.
JIM
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 845
Likes: 54
From: Bangor, Northern Ireland
Most roller cams actually have better manners than any flat tappet...and solid rollers are even better than hyd rollers usually. You can run a more aggressive solid roller and keep manners.
I did a 388" for a buddy with a custom 248* SR on a 107 LSA. That thing is sweet...sounds killer...will go 7K plus anytime and every time he drives it and is amazingly easy to drive even when he had the 3.36 gears in it with the 4 speed. He broke that rear and stuck in 3.70's now. It's a deep/low 11 sec car on plain BFG street radials.
JIM
I did a 388" for a buddy with a custom 248* SR on a 107 LSA. That thing is sweet...sounds killer...will go 7K plus anytime and every time he drives it and is amazingly easy to drive even when he had the 3.36 gears in it with the 4 speed. He broke that rear and stuck in 3.70's now. It's a deep/low 11 sec car on plain BFG street radials.
JIM
I concur
The flat tappet in my 383 is a bitch low down. My Dad’s sbc 427 with the Howard’s hyd roller 545” starts and idles smooth, but rips when you get on it.
I defo think I’m going solid roller.
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 845
Likes: 54
From: Bangor, Northern Ireland
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 845
Likes: 54
From: Bangor, Northern Ireland
So the plan is. Take the tko600rr out of the vette and put it in the Camaro (current has .64 Tremec). To see if it solves his whine issue.
If that sorts it the gearbox can stay in the Camaro and I’ll buy a TKX .82 fifth for the vette, at the same time I’ll change the ali flywheel for a steel one and put a new clutch in and change the cam.
what’s involved with a retro fit roller in a gen I sbc?
If that sorts it the gearbox can stay in the Camaro and I’ll buy a TKX .82 fifth for the vette, at the same time I’ll change the ali flywheel for a steel one and put a new clutch in and change the cam.
what’s involved with a retro fit roller in a gen I sbc?
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Then you go to the lobe chart PDF's and you can see all the availiable lobes from mild to wild. solid roller can handle steep ramps and high valve lifts. I chose endurance racing series lobes with .644/670 lift with my .014 hot lash. Then had it ground on 112 lc. 110 lc would make it sound roudier. My 427 small block I also went with the 4/7 firing order swap