Engine bore recommendation
Thread Starter
Teching In
Joined: Nov 2019
Posts: 4
Likes: 1
Engine bore recommendation Hey everyone, I’ve hit a snag in my build and was hoping someone with some more knowledge could give me some advice.
I took my engine to the machine shop and it’s showing “.005 out of round”. The guy said that I could drive it with that but it’d be a better engine with it bored.
from what I understand the max bore is .010. If I’m already .005 out of tolerance then I’m assuming I can only bore another .005 to clean it up. My pistons are showing that I am .004 under STD.
My question is if I am planning on running Boost, would it be better to buy new pistons and not bore it. Or would it be better to bore it to the max .010 and risk them thinning it too much? I’m assuming new pistons are required regardless.
thanks I’m advance for any help.
I took my engine to the machine shop and it’s showing “.005 out of round”. The guy said that I could drive it with that but it’d be a better engine with it bored.
from what I understand the max bore is .010. If I’m already .005 out of tolerance then I’m assuming I can only bore another .005 to clean it up. My pistons are showing that I am .004 under STD.
My question is if I am planning on running Boost, would it be better to buy new pistons and not bore it. Or would it be better to bore it to the max .010 and risk them thinning it too much? I’m assuming new pistons are required regardless.
thanks I’m advance for any help.
I know there wasn't a lot of wiggle room on the early LS1 engines. How far I can't say. Hopefully someone like KCS or Helicoil with waay more machine shop experience can chime in.
How much boost are you planning on running? It may be easier and cheaper to get a 5.3 block and boost the **** out of it.
How much boost are you planning on running? It may be easier and cheaper to get a 5.3 block and boost the **** out of it.
I agree with Liljay. Depends on how much boost you want to throw at it. Ring seal is your friend, so don’t skimp. You want the cylinder as close to perfect as possible.
Ive read here on Tech that people have went .010 on an LS1 and then I’ve read some on Tech say that .005 is absolute max. I’ve never had an LS1 to a machine shop, so I’m no help at all here.
Ive read here on Tech that people have went .010 on an LS1 and then I’ve read some on Tech say that .005 is absolute max. I’ve never had an LS1 to a machine shop, so I’m no help at all here.
Thread Starter
Teching In
Joined: Nov 2019
Posts: 4
Likes: 1
I know there wasn't a lot of wiggle room on the early LS1 engines. How far I can't say. Hopefully someone like KCS or Helicoil with waay more machine shop experience can chime in.
How much boost are you planning on running? It may be easier and cheaper to get a 5.3 block and boost the **** out of it.
How much boost are you planning on running? It may be easier and cheaper to get a 5.3 block and boost the **** out of it.
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Just my .02
I would rather have a running car than something sitting in the garage for a year while I build it. Life happens and **** takes 5 times longer than expected unless you have deep pockets.
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Might ask him to make a .005 pass on it, if it's .005 out, doing a .005 would bring it right in doing a .010 would actually cut beyond the .005 out.
If he can clean it up at .005 run it.
If not... I don't know. You'd actually have to run it and see if it were going to be an issue but the max recommended is .005 over
You could always back up and go with a 5.3, or if it's in the budget buy a new LS2 block and run your crank in it and your covers on it. Sell off the LS1 stuff to help cover it. The bare LS2 block is right around 1400. Not cheap but not horrible
If he can clean it up at .005 run it.
If not... I don't know. You'd actually have to run it and see if it were going to be an issue but the max recommended is .005 over
You could always back up and go with a 5.3, or if it's in the budget buy a new LS2 block and run your crank in it and your covers on it. Sell off the LS1 stuff to help cover it. The bare LS2 block is right around 1400. Not cheap but not horrible
You said you wanted advice, here’s mine. At the BARE MINIMUM have the block honed .005”. Might cost you a buck eighty plus piston/ring set, which you can pick up at WS6Store for cheap.
I think putting it back together as is, is a bad idea, unless your dumping the car.
