Which engine for turbo application, 5.3L or 5.7L LS1?
#21
TECH Addict
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The hear-say that "cast" is harder to weld probably comes from welding cast iron. A lot of people have problems with that as there is a procedure to doing it right. Its not actually harder... its just that you need to know the process.
#22
if it was me. yes.
rebuild the ls1 if thats what you really want. but you can find a complete 5.3 longblock for about that price 400-600$ in running condition.
i have a stock bottom end 4.8 which i plan to push to around 700+rw full trim. and i also have a 5.3 that i will push as much as possible before the 4.8.
the 4.8 has better heads, gaskets, studs.
the 5.3 is completely stock except for upgraded springs and pr
rebuild the ls1 if thats what you really want. but you can find a complete 5.3 longblock for about that price 400-600$ in running condition.
i have a stock bottom end 4.8 which i plan to push to around 700+rw full trim. and i also have a 5.3 that i will push as much as possible before the 4.8.
the 4.8 has better heads, gaskets, studs.
the 5.3 is completely stock except for upgraded springs and pr
what would be your reasoning for choosing 5.3 over 5.7 for a turbo? Besides cost
thanks man!
Regarding my LS1 block, I called a couple professional shops. They both said they would weld up the block, but both also sounded like it wasn't a good idea. That pretty much pushed me away 100% from that option. I would be getting a used LS1 block and transferring parts to that from my LS1. Thing is if I were to get a 5.3, I would need to rebuild it also to add the new pistons/rods and to check everything out. So it comes down to just which would be a better choice for a turbo, which would gain power more easily, reliability, etc.
Last edited by TXjeepTJ; 01-14-2011 at 12:26 AM.