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Ryridesmotox · 02-07-2015, 10:42 PM

The morels are some of the best lifters around. If you don't mind the extra expense over the ls7 lifters, I'd jump on them. The 799 truck heads are good basically the same as 243s on an ls6. If they have already been milled down, that might be where some of your knock issue is coming from. I might have access to a set of stock 243s or 799s. I'll ask my buddy that I work with flipping cars and motors with. He has a bunch of different heads. The ls7 valve are likely too big to be stuffed into those heads with a smaller bore motor. That's also the reason the LS7 head has a different valve angle than any other LS head... To fit the valves. If you do send the heads out, have the shop see how big the chambers are. If they have been milled significantly, I would say that is your likely culprit in your knock issue. I think in my thread you were saying you were having issues with that.

Are you running a 5.3/4.8 truck block? Or a LS1?

02-07-2015, 10:42 PM	#28
Ryridesmotox Senior Member Join Date: Nov 2010 Posts: 510 Tweet	The morels are some of the best lifters around. If you don't mind the extra expense over the ls7 lifters, I'd jump on them. The 799 truck heads are good basically the same as 243s on an ls6. If they have already been milled down, that might be where some of your knock issue is coming from. I might have access to a set of stock 243s or 799s. I'll ask my buddy that I work with flipping cars and motors with. He has a bunch of different heads. The ls7 valve are likely too big to be stuffed into those heads with a smaller bore motor. That's also the reason the LS7 head has a different valve angle than any other LS head... To fit the valves. If you do send the heads out, have the shop see how big the chambers are. If they have been milled significantly, I would say that is your likely culprit in your knock issue. I think in my thread you were saying you were having issues with that. Are you running a 5.3/4.8 truck block? Or a LS1? __________________ The Tow Pig: 2013 Silverado 1500 crew cab The Race Car lol: 2004 Cadillac CTS-V... With things. Better to be judged by 12 than to be carried by 6.