patriot performance heads?
12-16-2007, 10:34 AM
#6
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I too have been looking at patriot heads for my stock shortblock LS1, I have a LS6 intake, MS3 cam and Longtubes and wanted to swap heads and I was thinking that I read that you could use Stage 2 heads with the stock pistons without fly cutting usually? I know the cam is going to be what determines PTV clearance but does anyone know if this will fit?
12-16-2007, 11:40 AM
#7
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what if i go with a thick head gasket. would i need flycutting then? iv had this cam in for a year now with ls6 heads and no problems. do you think ill need to fly cut with a stage 2?
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12-16-2007, 03:23 PM
#8
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How much clearance have you got now with the 2" valves?
If you cant answer that, then nobody can answer if you need to cut with the larger valve of the stg 2.
If you cant answer that, then nobody can answer if you need to cut with the larger valve of the stg 2.
12-16-2007, 03:51 PM
#9
I too have been looking at patriot heads for my stock shortblock LS1, I have a LS6 intake, MS3 cam and Longtubes and wanted to swap heads and I was thinking that I read that you could use Stage 2 heads with the stock pistons without fly cutting usually? I know the cam is going to be what determines PTV clearance but does anyone know if this will fit?
Not unless the valves are sunk, the bigger ones will not clear an MS3. You can go with ported stock valve unmilled LS6 heads.
12-16-2007, 05:23 PM
#14
no, ptv means piston to valve clearance.
You got the biggest cam you could fit under stock heads. Stock heads also mean stock valves. If you go any bigger than a stock valve, you're going to have issues. It's really simple to understand. If you want a bigger valve than a stock valve, YOU WILL HAVE TO FLYCUT. You can't get either of those valves.
12-16-2007, 07:27 PM
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no, ptv means piston to valve clearance.
You got the biggest cam you could fit under stock heads. Stock heads also mean stock valves. If you go any bigger than a stock valve, you're going to have issues. It's really simple to understand. If you want a bigger valve than a stock valve, YOU WILL HAVE TO FLYCUT. You can't get either of those valves.
You got the biggest cam you could fit under stock heads. Stock heads also mean stock valves. If you go any bigger than a stock valve, you're going to have issues. It's really simple to understand. If you want a bigger valve than a stock valve, YOU WILL HAVE TO FLYCUT. You can't get either of those valves.
oh i forgot to mention that its a complete ls6 engine so i dont know if that changes anything. do they have valve reliefs in the pistons?
12-16-2007, 08:04 PM
#16
thanks for the advice but i kind of asked if that is what it meant. lol. so then i should get the 2.055 valves since im going to have to fly cut.
oh i forgot to mention that its a complete ls6 engine so i dont know if that changes anything. do they have valve reliefs in the pistons?
oh i forgot to mention that its a complete ls6 engine so i dont know if that changes anything. do they have valve reliefs in the pistons?
No, the LS1 and LS6 shortblocks are exactly same, except the LS6 block has better bay to bay breathing.
Make sure the 2.055 valve fits in a 3.9 bore, I think that valve is right at the edge of being too shrouded inside the stock bore, if it fits at all.
