268H grind? 280H or 292H Would be too much?
Or is it just gonna piss off the ECU?
EDIT 268H will have too much lift.
Going to have to stay around .450" lift with stock head.
(Interesting I did not realize that the Vortec had roller lifters.)
Seriously though, if you wanna swap into a more aggressive cam profile you will want to sink a little money into your cylinder heads. I would budget like 1K for them.
Now I am not speaking from Vortec experience here, but I have played around with some bigger cam grinds on earlier model SBC's.
(These were flat tappet lifter setups.)
The 292 grind had a very aggressive idle and low vacuum. I set it up with a 3500 rpm stall converter and a 3500 to 7500 rpm single plane manifold.
The 280 grind was lopey, but easier to manage.
I've thought about setting up a more radical cam profile on my Vortec as well.
Isn't there a LT-4 cam that works well with the Vortec? (The "Hot" version has a more radical profile?)
Camshaft, Hydraulic Roller Tappet, Duration at 0.50 lift 203/210, Lift at Valve .476/.480, Chevy, LT4.
Maybe this helps.
Also keep in mind that it might be a never ending pain in the ass once you get accustomed to the power and rev the motor higher and higher...
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Another user on another forum posted this...
GM Parts Direct
Production GM LT4 cam (P# 12551142, $182.58 gmpartsdirect.com)2551142
Duration @ .006 - 282/277
Duration @ .050 - 203/210
Lift w/1.5 rocker -.446/.449
LSA 115*
running it with 1.6:1 self aligning GMPP roller rockers, which bumps the lift to .476/.479, keep in mind I am running the LT4 springs, retainers, and seals too.
Or is it just gonna piss off the ECU?
EDIT 268H will have too much lift.
Going to have to stay around .450" lift with stock head.
(Interesting I did not realize that the Vortec had roller lifters.)
Seriously though, if you wanna swap into a more aggressive cam profile you will want to sink a little money into your cylinder heads. I would budget like 1K for them.
Now I am not speaking from Vortec experience here, but I have played around with some bigger cam grinds on earlier model SBC's.
(These were flat tappet lifter setups.)
The 292 grind had a very aggressive idle and low vacuum. I set it up with a 3500 rpm stall converter and a 3500 to 7500 rpm single plane manifold.
The 280 grind was lopey, but easier to manage.
I've thought about setting up a more radical cam profile on my Vortec as well.
Isn't there a LT-4 cam that works well with the Vortec? (The "Hot" version has a more radical profile?)
Camshaft, Hydraulic Roller Tappet, Duration at 0.50 lift 203/210, Lift at Valve .476/.480, Chevy, LT4.
Maybe this helps.
Also keep in mind that it might be a never ending pain in the ass once you get accustomed to the power and rev the motor higher and higher...
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Another user on another forum posted this...
GM Parts Direct
Production GM LT4 cam (P# 12551142, $182.58 gmpartsdirect.com)2551142
Duration @ .006 - 282/277
Duration @ .050 - 203/210
Lift w/1.5 rocker -.446/.449
LSA 115*
running it with 1.6:1 self aligning GMPP roller rockers, which bumps the lift to .476/.479, keep in mind I am running the LT4 springs, retainers, and seals too.
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