LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Patriot Valves vs. Manley Valves?

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Old 08-04-2009, 12:10 AM
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Default Patriot Valves vs. Manley Valves?

Which ones are better? I know nothing about valves. I have the AFR heads modified by TPiS which are 187cc AFR Heads with a 54cc compression chamber, 1.65 exh/2.02 int. and .600 lift springs.

They have manley valves right now, but I bent 3 and am replacing them all...want to at least get the same valves, but would prefer a slight upgrade...

Also are there any others out there people would say are better than either of these?
Old 08-04-2009, 12:15 AM
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Also...

What would be best for me? What is the differene between stock length (4.910") and +.100 (5.010") I know it means they are longer, but what difference does it make? Can I use them with my application? Are there any advantages to longer valves if I CAN use them? If I can't use them, please explain why just so I understand, and what it would take to be ABLE to...
Old 08-04-2009, 02:56 AM
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You pretty much already had some bomb valves. I'd replace them with the same. Valve stem length will alter your valvetrain geometry. If you change the valve stem length, you'll have to remeasure your pushrod length.
Old 08-04-2009, 03:44 AM
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I agree with this ^

You need to call AFR
Old 08-04-2009, 10:27 AM
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They used Manley Race Flo Valves...

I will go with those valves again. They are on order.



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