Help with larger valves

Munozhec

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What vehicle(s) do you drive?
Cadillac deville
Bought a setup of rockers valves springs 472 but I need to go 2.19 on intake 1.9 on exhaust Putting in a rv cam does this contradict each Luther or will porting heads with a rvcam Help accelerate
 

robocop

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What vehicle(s) do you drive?
1987 Cutlass Supreme 2 door with 500 Cad/Turbo 40
There is big block Chevy valves of right length. I used a set that are 2.18/1.88 and stem diameter same as Cadillac.. Some experts say you don't need such a big exhaust valve. If you aren't going all out hot street/strip just porting your heads will do a lot for a cruiser.
 

5one9

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2007 Magnum SRT8, 1957 F100
I have 2.19/1.90 with a 0.600”+/240+ roller cam and it is probably useful. I am in the process of installing a 0.500”+/230 hydraulic flat tappet with porting and stock valves and I believe that is all that will be needed. I personally wouldn’t spend the money in your case.
 

Caddylackn

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Bought a setup of rockers valves springs 472 but I need to go 2.19 on intake 1.9 on exhaust Putting in a rv cam does this contradict each Luther or will porting heads with a rvcam Help accelerate
If you must upsize, there are also the 2.11/1.77 Pontiac Ram Air IV valves that will work in Cadillac heads. There are two different lengths that work with either the small chamber or large chamber Cadillac heads. You would want the 45 degree seats, not the stock Pontiac 30 degree seats. This would be a better choice for a street engine and require a lot less porting to make work. Some of the Cadillac or High performance Pontiac vendors sell them.

There are many old post covering valve size upgrades.

https://cadillacmagazine.com/forums/threads/902-heads-big-valves.7953/
 

Darius

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Bought a setup of rockers valves springs 472 but I need to go 2.19 on intake 1.9 on exhaust Putting in a rv cam does this contradict each Luther or will porting heads with a rvcam Help accelerate

What vehicle is this engine in??? The camshaft choice is what makes me ask.

bro. d
 
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