Which engine for turbo application, 5.3L or 5.7L LS1?
Which engine for turbo application, 5.3L or 5.7L LS1? Which engine for turbo application, 5.3L or 5.7L LS1?
I plan to get a 5.3L 1999-2004 truck, which I then want to do a single turbo - looking to get around 500rwhp.
I currently have a LS1 5.7L out of a 2000 Camaro SS, from a previous engine swap I did.
I have read that the 5.3L would handle the turbo better since it has a lower compression, but then I also heard that the 5.3L isn't a good choice because of low torque and fewer cubic inches.
I would plan on going with forged pistons and rods. Which means I would be able to change up the compression ratio of the 5.7L, unless you think the stock compression ratio is fine - let me know what you think
The catch of all this is, the LS1 block has crack on the exterior. Which means it would have to be replaced (or fixed.. but I don't know if I want to attempt that).
Should I go through the trouble of getting the LS1 back and going, lower the compression and use it? Or will the 5.3L shine more if I were to put the money into it instead of bringing the LS1 back from the dead?
If you were in my position, what would you do?
I plan to get a 5.3L 1999-2004 truck, which I then want to do a single turbo - looking to get around 500rwhp.
I currently have a LS1 5.7L out of a 2000 Camaro SS, from a previous engine swap I did.
I have read that the 5.3L would handle the turbo better since it has a lower compression, but then I also heard that the 5.3L isn't a good choice because of low torque and fewer cubic inches.
I would plan on going with forged pistons and rods. Which means I would be able to change up the compression ratio of the 5.7L, unless you think the stock compression ratio is fine - let me know what you think
The catch of all this is, the LS1 block has crack on the exterior. Which means it would have to be replaced (or fixed.. but I don't know if I want to attempt that).
Should I go through the trouble of getting the LS1 back and going, lower the compression and use it? Or will the 5.3L shine more if I were to put the money into it instead of bringing the LS1 back from the dead?
If you were in my position, what would you do?
I am building a 5.3 bored to 5.7 (3.905) and using D1SC Procharger. My LS1 cracked at about 700 RWHP and this was a cheaper way to get me up and running again. I would not use the LS1 if the block is cracked. Good luck on your build.
does it need to be re-sleeved for that? how much does it cost to bore it out (I've heard of it before and what it is, but never heard of the general cost of it is)
u will spend for what you can get a new 6.0 iron block. and it will always be just a liablity. the 5.3 will handle some psi. 4.8/5.3 have been known to push above 500rw with everything else being correct, tune, fuel etc.
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thanks for the replies by the way! really appreciate it
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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
I found the block bored out to 5.7 for $175, had the pistons already so it just needed to be honed to 3.905. This was much cheaper than going with a 6.0 block. The block does not need to be re-sleeved and would probably cost a couple hundred to get bored.
AL is super easy to fix. you'd be surprised at how bad of an AL block/head you can just weld up.
and the stock ls1 internals are fine at that power level, so is the compression.
and the stock ls1 internals are fine at that power level, so is the compression.
Last edited by kmracer; Jan 9, 2011 at 04:01 PM.
Go talk to a welder about welding ANYTHING cast....none of them will say its easy....