Poor man's LS2... What do you guys think?
07-02-2009, 09:16 AM
#1
Poor man's LS2... What do you guys think? Hey guys, I have had my 6.0 LQ4 powered Datsun Z going for almost a year. Now that I am used to the power, I find myself wanting alittle more...
Right now my LQ4 is stock minus a Lunati Voodoo 60511 cam. My compression is only 9.4:1 with the stock 317 heads (w/yellow LS6 springs) or I would of gone with a little bigger grind.
I can nail a set of extremely low mileage 2005 5.3 heads (61 cc chambers) for $50 complete for the pair. My thought was to have my local performance machine shop cut the 5.3 heads for 2.02/1.57 intake/exhaust stainless steel valves, do a nice 5 angle valve job, some minor short side radias port work, and slap them back together with my LS6 yellow springs and using those on my LQ4 short block along with the same Voodoo 60511 cam (for the time being). If my math says that should put me at least in the 10.5:1 (if not 10.9:1), correct?
So what do you guys think? Decent, low buck, upgrade for my 6.0 LQ4?
Thanks.
Right now my LQ4 is stock minus a Lunati Voodoo 60511 cam. My compression is only 9.4:1 with the stock 317 heads (w/yellow LS6 springs) or I would of gone with a little bigger grind.
I can nail a set of extremely low mileage 2005 5.3 heads (61 cc chambers) for $50 complete for the pair. My thought was to have my local performance machine shop cut the 5.3 heads for 2.02/1.57 intake/exhaust stainless steel valves, do a nice 5 angle valve job, some minor short side radias port work, and slap them back together with my LS6 yellow springs and using those on my LQ4 short block along with the same Voodoo 60511 cam (for the time being). If my math says that should put me at least in the 10.5:1 (if not 10.9:1), correct?
So what do you guys think? Decent, low buck, upgrade for my 6.0 LQ4?
Thanks.
Last edited by Ford_Assassin; 06-06-2010 at 06:54 PM.
07-02-2009, 09:36 AM
#2
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i know if it were me and i had the engine apart id just go ahead and toss a custom cam in that to make it worthwhile. But if you dont have the cash for another cam i dont see a reason you wont hit your 400 hp goal at the crank... Just remember if you go milling the heads you will need the check for correct pushrod height.
07-02-2009, 09:49 AM
#3
I'll prob swap to a Lunati Voodoo 60512 or larger down the road, but I don't have the extra cash to make that happen too.
I wasn't planning milling the 706's or the 317's. I thought about it though, but I don't wanna mess with custom pushrods, etc. Plus I might want to be able to use a 125-150 shot of nitrous down the road without worrying about the head deck being thick enough to withstand it.
I wasn't planning milling the 706's or the 317's. I thought about it though, but I don't wanna mess with custom pushrods, etc. Plus I might want to be able to use a 125-150 shot of nitrous down the road without worrying about the head deck being thick enough to withstand it.
Last edited by Ford_Assassin; 06-06-2010 at 06:56 PM.
07-02-2009, 09:59 AM
#4
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You can go ahead and run a 2.02 intake on the set of heads you have off of the 5.3. That is what I am running on my 6.0 with a good decking and the new valves I ended up with a 57-58 cc chamber. They bump the compression up a good bit
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07-04-2009, 01:22 PM
#8
Here is a better Idea just buy some low milage LS2/LQ9 pistons. The 317 heads flow better in stock forum any way then the 4.8/5.3L heads
Used pistons = around$75 for just the pistons around $150-$200 with the matching floating rods.
Used heads = around $100 PLUS you will have to referbush them and add the larger valves and so on another $200-$500 depending on what you put on them.
Don't you forget you will also need to factor the hardware too
Used pistons = around$75 for just the pistons around $150-$200 with the matching floating rods.
Used heads = around $100 PLUS you will have to referbush them and add the larger valves and so on another $200-$500 depending on what you put on them.
Don't you forget you will also need to factor the hardware too
07-04-2009, 01:25 PM
#9
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In the end won't they both cost the same?
All the mod additions to the LQ4 vs. a used LS2 and the yards? What are your total projected costs on the motor alone in the end if you don't mind me asking?
All the mod additions to the LQ4 vs. a used LS2 and the yards? What are your total projected costs on the motor alone in the end if you don't mind me asking?
06-06-2010, 06:58 PM
#11
Here is a better Idea just buy some low milage LS2/LQ9 pistons. The 317 heads flow better in stock forum any way then the 4.8/5.3L heads
Used pistons = around$75 for just the pistons around $150-$200 with the matching floating rods.
Used heads = around $100 PLUS you will have to referbush them and add the larger valves and so on another $200-$500 depending on what you put on them.
Don't you forget you will also need to factor the hardware too
Used pistons = around$75 for just the pistons around $150-$200 with the matching floating rods.
Used heads = around $100 PLUS you will have to referbush them and add the larger valves and so on another $200-$500 depending on what you put on them.
Don't you forget you will also need to factor the hardware too
I can't afford AFR's....
