MAX Valve Size on a STOCK BORE LS1????
MAX Valve Size on a STOCK BORE LS1???? What is the MAX. valve size (intake) that can be used with a stock bore LS1. I have been told that 2.05 is it and that 2.08 could cause some clearance issues with the Cylinder bore itself. I have an all stroke 396 and want to use the biggest valve so help me out here guys!!! The combustion chambers on the HEAD have already been clearanced for the larger valves so I am just concerned with the block side of this for now.
Thanks
Thanks
Last edited by sr71bb; Dec 25, 2003 at 07:55 PM.
Not much I can add...
2.02's are fine on a 346 but some run 2.05's
2.02 are a little small for a 382 stroker/Big bore
2.05 is good for a 382 stroker and Big Bore
2.08 big for a 346 or stroker, and good for a Big Bore or super stroker.
I'd rather have the 2.05's in the stroker probably have a little more P to V safety margin than 2.08's
2.02's are fine on a 346 but some run 2.05's
2.02 are a little small for a 382 stroker/Big bore
2.05 is good for a 382 stroker and Big Bore
2.08 big for a 346 or stroker, and good for a Big Bore or super stroker.
I'd rather have the 2.05's in the stroker probably have a little more P to V safety margin than 2.08's
Keep in mind that you are stroking the motor, but you are not boring any. You would run into the same adverse effects of a big valve on a 346 cause you are not changing the bore size. A 2.08 would be to big and most likley send the air directly into the cylinder wall causing turbulence and a loss of HP. I would not go bigger than a 2.05 on the stock bore.
Originally Posted by kumar75150
How much power are you making SR71BB?
I have a Lunati 395/396 as well and I have 2.02 valves.
Making 480ish hp right now. Anyone think that 2.055 valves will increase peak hp at all?
I have a Lunati 395/396 as well and I have 2.02 valves.
Making 480ish hp right now. Anyone think that 2.055 valves will increase peak hp at all?
Kumar,
This motor is being assembled now as we speak so I don't have any power figures YET. Hoping for 500+ so that's the reason for the larger valves, more peak power. May have to also go with oval manifold or LSX manifold to get there. IF the heads will flow a LEGITIMATE 320-325 at peak then the 500+ will be possible.
BTW, Thanks guys for the replies, I think we will try the 2.05's.
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Originally Posted by 2001CamaroGuy
2.08"/1.60" valves WILL fit in a stock bore. My heads were set up with large valve in prep for a future (now aproaching) big bore motor.
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