Serious question
03-10-2012, 08:42 PM
#1
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Serious question Iv got a serious question. I'm having my 383stroker fixed because the machine shop that the shop used boarded it out more than they thought to clean up the bores which caused my engine to use an excess of oil because there was to much space between the rings and the walls of the block. They are fixing it on there pockets. My question is I'm planning on boosting it to the tune of 600-700+ wrhp, so the pistons are going to be custom made to fit. Will the extra material removed making the walls thinner be an issue at that power level?
03-12-2012, 12:49 PM
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The block is a stock ls1 I had the made to the 383 stroker. The final bore according to the shop will be 3.910. As for the pistons I'm having custom ones made. I guess the biggest question I have is, Is the 3.910 bore ok for a 600 rwhp setup?
Last edited by Blown02Camaro; 03-12-2012 at 04:34 PM.
03-12-2012, 04:45 PM
#5
you need to tell us if you had it bored .030 over to get the 383 or if you are using a different crankshaft.
I am glad you mentioned this is a serious post. Ill take the rest of them as not so serious since they didnt mention it.
from the info you give, it makes no sense. if there was too much space between the walls of the piston and the cylinder then improper sized pistons were used.
custom made to fit pistons? more like they are going to match the piston size to the bore size.
with 500 plus horsepower, there is little that is reliable. unless you buy a ferrari.
I am glad you mentioned this is a serious post. Ill take the rest of them as not so serious since they didnt mention it.
from the info you give, it makes no sense. if there was too much space between the walls of the piston and the cylinder then improper sized pistons were used.
custom made to fit pistons? more like they are going to match the piston size to the bore size.
with 500 plus horsepower, there is little that is reliable. unless you buy a ferrari.
03-12-2012, 04:57 PM
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you need to tell us if you had it bored .030 over to get the 383 or if you are using a different crankshaft.
I am glad you mentioned this is a serious post. Ill take the rest of them as not so serious since they didnt mention it.
from the info you give, it makes no sense. if there was too much space between the walls of the piston and the cylinder then improper sized pistons were used.
custom made to fit pistons? more like they are going to match the piston size to the bore size.
with 500 plus horsepower, there is little that is reliable. unless you buy a ferrari.
I am glad you mentioned this is a serious post. Ill take the rest of them as not so serious since they didnt mention it.
from the info you give, it makes no sense. if there was too much space between the walls of the piston and the cylinder then improper sized pistons were used.
custom made to fit pistons? more like they are going to match the piston size to the bore size.
with 500 plus horsepower, there is little that is reliable. unless you buy a ferrari.
03-12-2012, 05:18 PM
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Your max bore on an LS1 is 3.905. Read here https://ls1tech.com/forums/generatio...ls1-block.html
How are you planning on making 800+ hp? forced induction I presume? If so, I would take it to a reputable shop who knows the ins and outs of building a forced induction engine. Just about any machine shop can assemble a stock long block, but if you start throwing anything other than OEM parts at them, they just wing it, on your dime.
If it were me, I would cut my losses, find another LS1 block and have another shop build it. If they have punched your cylinders out to 3.910, it is going to need to be resleeved.
How are you planning on making 800+ hp? forced induction I presume? If so, I would take it to a reputable shop who knows the ins and outs of building a forced induction engine. Just about any machine shop can assemble a stock long block, but if you start throwing anything other than OEM parts at them, they just wing it, on your dime.
If it were me, I would cut my losses, find another LS1 block and have another shop build it. If they have punched your cylinders out to 3.910, it is going to need to be resleeved.
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03-12-2012, 06:34 PM
#8
I'd agree that its time to cut your losses with this shop and look into a new block altogether. If they couldn't get the piston-wall clearance right, how confident can you be that they got the bearing clearances right?
I'd go with a 5.3L iron block, punch it out to 3.905" and go from there. you may still be able to use the old pistons if they're not in bad shape. If not, and you have to buy new pistons anyways, maybe a 6.0L block would be better.
I'd go with a 5.3L iron block, punch it out to 3.905" and go from there. you may still be able to use the old pistons if they're not in bad shape. If not, and you have to buy new pistons anyways, maybe a 6.0L block would be better.
Last edited by KCS; 03-12-2012 at 06:49 PM.
03-12-2012, 06:44 PM
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Your max bore on an LS1 is 3.905. Read here https://ls1tech.com/forums/generatio...ls1-block.html
How are you planning on making 800+ hp? forced induction I presume? If so, I would take it to a reputable shop who knows the ins and outs of building a forced induction engine. Just about any machine shop can assemble a stock long block, but if you start throwing anything other than OEM parts at them, they just wing it, on your dime.
If it were me, I would cut my losses, find another LS1 block and have another shop build it. If they have punched your cylinders out to 3.910, it is going to need to be resleeved.
How are you planning on making 800+ hp? forced induction I presume? If so, I would take it to a reputable shop who knows the ins and outs of building a forced induction engine. Just about any machine shop can assemble a stock long block, but if you start throwing anything other than OEM parts at them, they just wing it, on your dime.
If it were me, I would cut my losses, find another LS1 block and have another shop build it. If they have punched your cylinders out to 3.910, it is going to need to be resleeved.
03-12-2012, 06:45 PM
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I'd agree that its time to cut your losses with this shop and look into a new block altogether if they couldn't get the piston-wall clearance right, how confident can you be that they got the bearing clearances right?
I'd go with a 5.3L iron block, punch it out to 3.905" and go from there. you may still be able to use the old pistons if they're not in bad shape. If not, and you have to buy new pistons anyways, maybe a 6.0L block would be better.
I'd go with a 5.3L iron block, punch it out to 3.905" and go from there. you may still be able to use the old pistons if they're not in bad shape. If not, and you have to buy new pistons anyways, maybe a 6.0L block would be better.
03-12-2012, 06:57 PM
#11
If you have to buy pistons, go with the larger bore block and gain the extra 25 cubic inches.
03-12-2012, 07:06 PM
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It really depends on what shape the pistons are in. The 5.3L blocks are a lot cheaper than 6.0L blocks, but the 5.3L would have to be bored, then honed while the 6.0L would just need a hone, so thats a wash.
If you have to buy pistons, go with the larger bore block and gain the extra 25 cubic inches.
If you have to buy pistons, go with the larger bore block and gain the extra 25 cubic inches.
03-13-2012, 08:29 AM
#14
i would run it myself and not worry about it if an extra .005 makes the difference in the block holding or busting it was a junk block to begin with at .005 more bore that is just .0025 per side of the cylinder and that is about the thickness of a hair or a sheet of paper
03-13-2012, 10:43 PM
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Thats what a few shops I have talked to have said, at the power level I want to make ill be fine.. Im just going to leave it at 600-650 and be happy with it
