What block prep for the high HP 347's?
What block prep for the high HP 347's? I know some of the guys here, Harlan, Kyle, Dare I say PSJ?, have pushed the LS1 Aluminum block far. What kind of block prep was done to them?
Iron and Ls2 answers need not apply
Block Fill?
Pinned mains?
Billet caps?
Girdle?
etc...
Thinking of putting a 88 or gt91 on the car for next year.
Iron and Ls2 answers need not apply
Block Fill?
Pinned mains?
Billet caps?
Girdle?
etc...
Thinking of putting a 88 or gt91 on the car for next year.
Last edited by 4bangermustang; Nov 16, 2010 at 10:54 PM.
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Machining costs can add up quickly. Main studs require line boring. Probably need to deck block and hone as well. Doweling mains more $$ and girdle & billet caps even more.
For the money, ERL's Superdeck treatment for an LS1 looks like a pretty good buy. Bigger bore, durable sleeves, billet caps, studs..... While not cheap, like most things in life you get what you pay for.
There probably is a big difference in what you should do between 800 and 1000 hp. 800 can probably live a long time with studs, line boring and quality build. Going to 1000 hp I'd think you want to spend more $$ for durability.
For the money, ERL's Superdeck treatment for an LS1 looks like a pretty good buy. Bigger bore, durable sleeves, billet caps, studs..... While not cheap, like most things in life you get what you pay for.
There probably is a big difference in what you should do between 800 and 1000 hp. 800 can probably live a long time with studs, line boring and quality build. Going to 1000 hp I'd think you want to spend more $$ for durability.
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No matter what is done to a LS1 5.7 aluminum block, they crack sleeves and/or deck etc or sleeves distort after many passes. Installing Darton sleeves would fix that, at an exponential price.
Iron block.
Fraser
Iron block.
Fraser
so you can prove that the bores cracked due to much power?
and it cracked the outside head bolt area due to power or is it from coolant? becaues one point you state that they crack at 1000hp then you show a pic where you say it cracked due to coolant? so which one is it?
psj making 900rwhp for years mustve got super lucky! and harlan must've went 8.29 on only 800rwhp!
LOL
and it cracked the outside head bolt area due to power or is it from coolant? becaues one point you state that they crack at 1000hp then you show a pic where you say it cracked due to coolant? so which one is it?
psj making 900rwhp for years mustve got super lucky! and harlan must've went 8.29 on only 800rwhp!
LOL
Detonation most likely, with FI more chances for detonation. Iron blocks have shown to not crack as often when detonated.
I stated why they crack in the head bolt hole, no relation to power, it becomes difficult to find an LS1 core when many are cracked.
I stated why they crack in the head bolt hole, no relation to power, it becomes difficult to find an LS1 core when many are cracked.
if the motor that u posted with the cracked sleeve had been filled, wouldnt that mean less expansion in the wall and prevent it to crack???
just for the future searchers:
sorry to bring this post back from the dead but the first pic AES used is mine and was not the subject of the power limits of the block. I'm guessing they stole the pic from somewhere and just took it for what it was worth. It was a lowly 01 ls1 block with too much boost and timing with not enough fuel. 
Not saying the ls1 block is strong enough, just that back in the day, it did well. Overspun D1SC north of 800rwhp.
the second pic is not related to my block at all. It's amazing what happens to your pictures once they go on the internet.
sorry to bring this post back from the dead but the first pic AES used is mine and was not the subject of the power limits of the block. I'm guessing they stole the pic from somewhere and just took it for what it was worth. It was a lowly 01 ls1 block with too much boost and timing with not enough fuel. Not saying the ls1 block is strong enough, just that back in the day, it did well. Overspun D1SC north of 800rwhp.the second pic is not related to my block at all. It's amazing what happens to your pictures once they go on the internet.
