Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

Bore?how big?

Old Jul 27, 2006 | 03:40 PM
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From: East Side Performance! mASShole
Thumbs up Bore?how big?

just wondering who has gone more then 402 on these ls2 blocks? any luck? more power/tq?
how much can you rip off them?
i was looking, and from what we see 30 over should be no problem.

i may try this winter and see how big i can go and ig she will take it
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Old Jul 27, 2006 | 10:32 PM
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RandyWS6 has a .030" LS2 block. I believe Shirl Dickey is building them that way.
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Old Jul 27, 2006 | 11:01 PM
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I've actually never heard of a 408 LS2. You can see if you can do more than 4" of stroke. A 4.100" stroke will give you a 412ci, a 4.250" stroke will give you a 427ci. something to look into.
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Old Jul 28, 2006 | 12:13 AM
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Originally Posted by Noyzee
just wondering who has gone more then 402 on these ls2 blocks? any luck? more power/tq?
how much can you rip off them?
i was looking, and from what we see 30 over should be no problem.

i may try this winter and see how big i can go and ig she will take it
They CAN go .030" over, but if you're already spraying 400 or so on top of your motor, 7-10 hp really isn't going to make much of a difference.

As far as increasing stroke, when you do that you have to move the pin higher into the piston. With a big nitrous setup, you can't have a lowered ringland and a 4.1" stroke unless you have aftermarket sleeves or you'll pull the piston out the bottom of the bore.

Noyzee my best advice for you is to just give me your 402 outright so I can help you break this addiction I'm here for you bud.

Nate
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Old Jul 28, 2006 | 12:20 AM
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I say just stick with what you have.
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Old Jul 28, 2006 | 09:08 AM
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DJ99ss is running a 408 LS2 with 18 psi from a F1 procharger.
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Old Jul 28, 2006 | 09:20 AM
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I've been building 418 cid LS2 strokers for some time now (4.030"B X 4.100"S) using the stock sleeve and no problems. My personal road race car is a 421 cid LS2 (4.030"B X 4.125" S) and I havn't pulled the pistons out the bottom of the sleeves yet... I just finished a 454 cid LS2 solid roller for Robert Judd (Gen III Motorsports) with Darton sleeves (4.187"B X 4.125"S) that will raise some eyebrows... My next engine will be a 433 cid L92 with 4.100" bore and 4.100" stroke using the stock sleeve... Anyone interested?
Shirl Dickey
SDRE
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Old Jul 28, 2006 | 10:16 AM
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Originally Posted by Nate_Taufer
They CAN go .030" over, but if you're already spraying 400 or so on top of your motor, 7-10 hp really isn't going to make much of a difference.

As far as increasing stroke, when you do that you have to move the pin higher into the piston. With a big nitrous setup, you can't have a lowered ringland and a 4.1" stroke unless you have aftermarket sleeves or you'll pull the piston out the bottom of the bore.

Noyzee my best advice for you is to just give me your 402 outright so I can help you break this addiction I'm here for you bud.

Nate
haha, you can have it. but befor i give it away, im taking the jets right out of my 2nd stage so it will be spraying like 600 plus 200 from my first stage.
id leave the jets out of the first stage as well, but i think id flip over


but seriosly.
im just wondering because im sure this winter i will pull the motor to ring/bearing it, but while it was out i was thinking punch it up a tad.

wasnt sure it was being done or not.

also, i know about the stroke, i thought about it befor i did the 402, but then nixted the idea do to moving the pin.
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Old Jul 28, 2006 | 12:00 PM
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Originally Posted by MrEracer
I've been building 418 cid LS2 strokers for some time now (4.030"B X 4.100"S) using the stock sleeve and no problems. My personal road race car is a 421 cid LS2 (4.030"B X 4.125" S) and I havn't pulled the pistons out the bottom of the sleeves yet... I just finished a 454 cid LS2 solid roller for Robert Judd (Gen III Motorsports) with Darton sleeves (4.187"B X 4.125"S) that will raise some eyebrows... My next engine will be a 433 cid L92 with 4.100" bore and 4.100" stroke using the stock sleeve... Anyone interested?
Shirl Dickey
SDRE
Yeah! can you give prices for these???

thanks Chris.
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Old Jul 28, 2006 | 05:30 PM
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Shirl you know i've already expressed interest in the 433. I'm just waiting for the L-92 blocks to hit the shelves first.

Nate
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Old Jul 28, 2006 | 07:54 PM
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Originally Posted by MrEracer
I've been building 418 cid LS2 strokers for some time now (4.030"B X 4.100"S) using the stock sleeve and no problems. My personal road race car is a 421 cid LS2 (4.030"B X 4.125" S) and I havn't pulled the pistons out the bottom of the sleeves yet... I just finished a 454 cid LS2 solid roller for Robert Judd (Gen III Motorsports) with Darton sleeves (4.187"B X 4.125"S) that will raise some eyebrows... My next engine will be a 433 cid L92 with 4.100" bore and 4.100" stroke using the stock sleeve... Anyone interested?
Shirl Dickey
SDRE

you went to 4.187 on a dry sleeve? thats pushin it!!

would be interested in some prices on the 433 setup.
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