Iron block or Aluminum block for high boost?
Iron block or Aluminum block for high boost? Basic question here. I have a perfectly running LS1. However I was going to sell it and build a forged bottom end iron block 5.3 (boring it up back to a 5.7) to use with a TT system and around 18-20lbs of boost for 850rwhp.
Question is, do I keep my LS1 and just buy the forged pistons and rods for that, or… sell it and buy my buddys 105k miles Iron 5.3 motor and bore it out to a 5.7 and install the forged pistons rods in that?
I thought (or I've read) that the aluminum block LS1 didnt like high boost. Opinions on which I should do?
Question is, do I keep my LS1 and just buy the forged pistons and rods for that, or… sell it and buy my buddys 105k miles Iron 5.3 motor and bore it out to a 5.7 and install the forged pistons rods in that?
I thought (or I've read) that the aluminum block LS1 didnt like high boost. Opinions on which I should do?
Go with the iron block. Its stronger. You could stay at 5.3 and make huge hp. I don't see any gain in boring it to a 5.7. Maybe get a stroker if you want more displacement.
Good luck.
Good luck.
If you go with the 5.3 I would leave the bore alone. The LS1 can handle 18 psi with no issues. Guys have been doing that since the beginning with prochargers.
If it was me, I'd put the internals in the LS1 block
If it was me, I'd put the internals in the LS1 block
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No one has mentioned yet, but the iron block weighs more.
Talk to Bob about the LS1 motors he has built with good results and BIG rwhp. IMO save some money and rebuilt the LS1 with forged internals. Stock crank is plenty strong.
IMO its best to rebuild what you have since know in advance that it is in good condition.
Talk to Bob about the LS1 motors he has built with good results and BIG rwhp. IMO save some money and rebuilt the LS1 with forged internals. Stock crank is plenty strong.
IMO its best to rebuild what you have since know in advance that it is in good condition.