862 heads on LS1
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On The Tree
Joined: Apr 2015
Posts: 110
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From: Bladenboro NC
862 heads on LS1 I'm getting some 862 heads from a buddy of mine for $30 for the pair. At that, price, I have to get them. I would like to do some porting and polishing on the heads and putting them on my LS1 along with a Howard's hotcam, headers, and cutouts. I have some LS3 valve springs I can put in the heads. I would want to put in some larger valves in the 862 heads if they're smaller than the stock LS1 valves. I would like to run some LS6 Z06 valves if I can get them for a good price. Trying to keep all of this on as tight a budget as possible.
Is there a good stock lifter I should get to replace the 190K mile lifters? LS7? Also, what's a good stock oil pump to put in there while I have everything apart? Will this still be a nitrous friendly set up for a 150 shot occasionally or will the c/r be too high?
Is there a good stock lifter I should get to replace the 190K mile lifters? LS7? Also, what's a good stock oil pump to put in there while I have everything apart? Will this still be a nitrous friendly set up for a 150 shot occasionally or will the c/r be too high?
862s will have smaller intakes and same exhaust valves. A machine shop will have to cut those seats bigger but it isn't that pricey. Can go to LS1 sized valve without changing the seat itself.
If you are truly chasing the unicorn that is true stock LS6 valves, don't expect them to come cheap. If they do, be suspicious IMO.
Stock chamber 862s will raise your compression on a LS1 marginally. Maybe 10.5:1? I don't see why you couldn't still run some nitrous with a proper tune and enough fuel.
Melling 10296 oil pump is direct bolt-on and fantastic with the high pressure spring. It's not cheap, but worth the investment, IMO. Otherwise, a stock LS2 pump or even the Melling stock replacement available cheaply at parts stores are decent pieces.
LS7 lifters are fine for such a cam. Nothing wrong with the Hot Cam per se, but you are leaving power on the table. Nothing wrong with wanting to stay within limits of LS3 valve springs..a custom cam shop can give you something better that stays below their max lift.
If you are truly chasing the unicorn that is true stock LS6 valves, don't expect them to come cheap. If they do, be suspicious IMO.
Stock chamber 862s will raise your compression on a LS1 marginally. Maybe 10.5:1? I don't see why you couldn't still run some nitrous with a proper tune and enough fuel.
Melling 10296 oil pump is direct bolt-on and fantastic with the high pressure spring. It's not cheap, but worth the investment, IMO. Otherwise, a stock LS2 pump or even the Melling stock replacement available cheaply at parts stores are decent pieces.
LS7 lifters are fine for such a cam. Nothing wrong with the Hot Cam per se, but you are leaving power on the table. Nothing wrong with wanting to stay within limits of LS3 valve springs..a custom cam shop can give you something better that stays below their max lift.
Last edited by Mercier; Mar 16, 2016 at 11:11 PM.
