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-   -   454 Mag modded Or stroked with non forged internals ? (https://www.offshoreonly.com/forums/restorations-upgrades/323607-454-mag-modded-stroked-non-forged-internals.html)

dereknkathy 03-24-2015 04:25 PM

hyd roller cam won;t break the bank and can run it with existing valvetrain. 112 LSA is the limit for stock GM exhausts. http://paceperformance.com/i-6254922...oller-cam.html

SB 03-24-2015 05:05 PM


Originally Posted by dereknkathy (Post 4283307)
hyd roller cam won;t break the bank and can run it with existing valvetrain. 112 LSA is the limit for stock GM exhausts. http://paceperformance.com/i-6254922...oller-cam.html

That cam has the following specs at .050" if installed at 108ICL
211° Intake Duration / 230° Exhaust Duration
112° LSA
Events at .050": IVO -2.5° BTDC / EVC -1.0° ATDC
Overlap -3.5°

And your saying the following cam will revert more because of the 110LSA ?
This cam has the following specs at .050" if installed at 110ICL
214.5° Intake Duration / 219° Exhaust Duration
110° LSA
Events at .050": IVO -2.5° BTDC / EVC -1.0° ATDC
Overlap -3.5°


Note: the two different cams have the same IVO/EVC Events and Overlap at .050".
The second cam has more intake at .050" duration, tighter (110 vs 112) LSA (Lobe Seperation Angle), but less exhaust duration.

IVO = Intake Valve Opens
EVC = Exhaust Valve Closes
These two events determine overlap. IE: when both valves open.

Gwd, I hope I did my math right. LOL. It should be correct.

dereknkathy 03-26-2015 10:54 AM

I was going by the rule of thumb that 112 lobe sep was the safe limit. I will refrain from mentioning a cam to anyone again.


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