Budget 6.0L, 5.3 heads?
#1
Budget 6.0L, 5.3 heads?
I have a 2003 6.0 Lq4 bottom end. How would a set of stock 2007 Non-DOD heads from a 5.3 do with this combination. I am debating on doing a cam and springs from comp cams maybe or just putting an lq9 cam in that I already have. Would these heads benefit from a mild port and polish job. My hope is that the smaller chamber of the 5.3 heads will make up for the dished pistons in the LQ4 block to get the compression up some more. Its a daily driver z28 with an auto not going to the track or any type of racing. The oil pump died and my wife drove the ls1 till it died.
#2
TECH Apprentice
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I think the 5.3L heads would do great . If you plan on doing a cam I wouldn't go any bigger than a cam with over 224 degrees at .050 on a 114 LSA since its a dd. If your on a budget the hotcam usually goes for cheap on here, i bought mine for $100 and new valve springs for $56 couldn't be happier considering the cost.
#3
13 Second Truck Club
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whats the valve size on them 07 53 heads the ones a little older had a lot smaller valves if you wanted to keep the 53 heads at least get a set of 2.00 intake valves cut in and whatever the matching exhaust valves are i just think the power of the added compression is going to be offset by the loss of flow from the stock 317s also you could pick up a set of ls6 heads 243s they go for around 550 on ebay that give a decent compression bump and nno loss of flow
#6
10 Second Club
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Texas Speed's 5.3 heads flow just as much as their ported ls6's! The compression bump is awesome if they do flow what they say. I am debating on some tsp 5.3 heads for my 6.0. I am questioning the bore size to combustion chamber size. Anybody know anything on this subject? Any 5.3 headed 6 liters out there?
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#11
6.0 blk and 5.3 heads?
I have a 99 trans am and I have a heads and cam kit package from texas speed. Its the 5.3 heads and torq v3 cam. I jus started havin a knock in my bottom end and was wonderin would it be a good idea 2 go with the 6.0 block and if it will wrk?