New LS1 Shortblock vs OEM block
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New LS1 Shortblock vs OEM block
Which is the better road to follow? My '02 Z28 has 146K miles. I am going to re-do engine. Brand new LS1 shortblock w/aftermarket heads, cam, etc or just go rotating assembly and balance/blueprint along with aftermarket heads/camshaft? Much thanks to the board for input.
#2
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The money you spend on a new shortblock & aftermarket heads you could have a new 402 or 408 shortblock. If your on a budget, id reuse the stock heads & LS6 intake on the 402/408. Install a nice cam, port the TB. You'll make 425-450rwhp. Then down the road, a nice set of heads & FAST intake and you'll make over 500rwhp-550rwhp..
If you buy a new shortblock & aftermarket heads, you make 425-450rwhp (maybe alittle more or less depending on the heads, cam & Intake) but with alot less torque than the 402/408 route.
If you buy a new shortblock & aftermarket heads, you make 425-450rwhp (maybe alittle more or less depending on the heads, cam & Intake) but with alot less torque than the 402/408 route.
Last edited by 30th t/a; 07-09-2012 at 08:17 PM.
#3
Depends exactly what your looking for and how much of the work you plan to do yourself. We can help you out no matter which direction you decide to take. I will say that once you price out what it costs to have your block machined, and assembled with a new rotating assembly you will be surprised how cost effective buying a new short-block, long-block, etc. can be since everything is ready to go and generally these packages are discounted quite a bit compared to buying everything separate. Regardless of which direction you decide to go feel free to call us we are happy to help.
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I am not anything of a mechanic and although I understand what parts do what, I would need someone of professional skill that knows LSx engines. I live in Charlotte, NC. I expect $5K plus to do this. Is "numbers only matching" worth keeping the OEM motor or going with a new LS1 shortblock?
Last edited by OB02Z28; 07-09-2012 at 08:40 PM.
#6
I am not anything of a mechanic and although I understand what parts do what, I would need someone of professional skill that knows LSx engines. I live in Charlotte, NC. I expect $5K plus to do this. Is "numbers only matching" worth keeping the OEM motor or going with a new LS1 shortblock?
#7
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Is there anything wrong with your current motor? 300K+miles is not unheard of out of a even a heavily modified LS1. Unless your looking for more displacement I'd just go with h/c/i on your stock short block. If your looking for more displacement I'd look at a 402 short block over rebuilding your LS1 to a 383. A 402 has more potential not just because of 19 more cubic inches, but because the 4inch bored will allow you a larger selection of heads.
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Is there anything wrong with your current motor? 300K+miles is not unheard of out of a even a heavily modified LS1. Unless your looking for more displacement I'd just go with h/c/i on your stock short block. If your looking for more displacement I'd look at a 402 short block over rebuilding your LS1 to a 383. A 402 has more potential not just because of 19 more cubic inches, but because the 4inch bored will allow you a larger selection of heads.
Nothing wrong with current motor. I thought starting with a fresh block would be wiser, but knowing the OEM LS1 block could be used, then I would only need a rotating assembly. I still would need a shop to balance & blueprint. Anyone know how much is typical b&b? Given the suggestions of others above, I have my answer. Thanks guys.
Last edited by OB02Z28; 07-11-2012 at 10:00 AM. Reason: responding to other posts
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