lq9 to 376ci?
and if you're boring and buying new components anyways why not spend a little extra and buy a new forged crank and build a 408 with a 4" stroke and 4.030 bore. From everything I've read not all block should be bored to 4.060 anyways and 4.030 is safer.
4.065 is the stock bore for an LS3 and I don't think it would be too advisable to take an iron block .065 over. Thats alot to take out.
If you did do it with stock LS3 internals you would end up using a 58x tooth crank and you would have to get that changed, which should be done by an experienced person, or get a converter box from Ligenfelter. Then to machine everything and buy an LS3 rotating assembly, you might as well buy a 408 rotating assembly from TSP and it will damn near come out the same. They have them at a starting price of 1695.00.
If you did do it with stock LS3 internals you would end up using a 58x tooth crank and you would have to get that changed, which should be done by an experienced person, or get a converter box from Ligenfelter. Then to machine everything and buy an LS3 rotating assembly, you might as well buy a 408 rotating assembly from TSP and it will damn near come out the same. They have them at a starting price of 1695.00.
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I'm doing the same. I'm using stock LS3 rods and pistons with the LS1 crank out of my old engine, so my rotating assembly was almost free. The stock pistons are actually pretty nice, and they'll hold up to the power level you're shooting for, so I don't see why you should need aftermarket pistons.
My block is already machined, just getting the crank balanced this week so I can mock it up and cut some valve reliefs.
My block is already machined, just getting the crank balanced this week so I can mock it up and cut some valve reliefs.
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4.065 is the stock bore for an LS3 and I don't think it would be too advisable to take an iron block .065 over. Thats alot to take out.
If you did do it with stock LS3 internals you would end up using a 58x tooth crank and you would have to get that changed, which should be done by an experienced person, or get a converter box from Ligenfelter. Then to machine everything and buy an LS3 rotating assembly, you might as well buy a 408 rotating assembly from TSP and it will damn near come out the same. They have them at a starting price of 1695.00.
If you did do it with stock LS3 internals you would end up using a 58x tooth crank and you would have to get that changed, which should be done by an experienced person, or get a converter box from Ligenfelter. Then to machine everything and buy an LS3 rotating assembly, you might as well buy a 408 rotating assembly from TSP and it will damn near come out the same. They have them at a starting price of 1695.00.
__________________
NOW OFFERING TSP BY YANK CONVERTERS
COMP - FAST - PACESETTER - WISECO PISTONS - LUNATI - CALLIES - NEW TSP BRAND CRANK & RODS - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - ARH HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - PRECISION INDUSTRIES - YANK - CIRCLE D - AND MORE!
COMP - FAST - PACESETTER - WISECO PISTONS - LUNATI - CALLIES - NEW TSP BRAND CRANK & RODS - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - ARH HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - PRECISION INDUSTRIES - YANK - CIRCLE D - AND MORE!
NEW NUMBER (512)863-0900
On the other hand, if you want to save some money and get more bang for your buck, you can find stock LS3 pistons for cheap, if not free, and spend about $150 on rings and be done. They're meant to last and they have a lot of nice features like coated skirts, anodized top ring lands, and oil reservoirs in the pin boss that you typically don't see in off the shelf aftermarket pistons. The downside is they won't have valve reliefs.
Don't know whats wrong with going .065 on a 6.0 block. Done it twice and made in the 600+ range with no problems. One of the motors has 80K hard miles on it at 7200 RPM shifts.
__________________
NOW OFFERING TSP BY YANK CONVERTERS
COMP - FAST - PACESETTER - WISECO PISTONS - LUNATI - CALLIES - NEW TSP BRAND CRANK & RODS - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - ARH HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - PRECISION INDUSTRIES - YANK - CIRCLE D - AND MORE!
COMP - FAST - PACESETTER - WISECO PISTONS - LUNATI - CALLIES - NEW TSP BRAND CRANK & RODS - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - ARH HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - PRECISION INDUSTRIES - YANK - CIRCLE D - AND MORE!
NEW NUMBER (512)863-0900
I think LQ9 pistons and rods are press fit and the LS3 pistons are a floating piston so you might want to check into that also when mix matching parts from a Gen 3 and Gen 4 engine.
