skorpion317

iTrader: (8)

Hi, I'm new to the boards. I originally owned a 3.8L 1998 Camaro...would've had an LS1, but insurance was high enough on the V6. That, plus a low-paying job don't help much.

Anyway, I had an idea. I'll be graduating from school in a year or so, and I'll be looking into an '01 or '02 LS1 Camaro. I've been doing some research into certain modifications. My plan for the engine is to get the GMPP LS6 conversion kit, as well as a stroker kit. The stroker kit would bring displacement up to 382ci. I was screwing around with possible bore/stroke combinations. the stock 3.900" bore of the LS1 combined with the 4.000" stroke of the kit gives the 382ci. I thought to myself, "What if I increase the bore to 4.000"?" The result would be 402ci...and the car would be effectively an SS396.

My question is, do i have to make any serious modifications to the block to bore it out .100"? a friend of mine told me it would have to be re-sleeved. I've only heard this term before, and I don't quite know what re-sleeving entails. anyone wanna help me out on this?

black_knight

iTrader: (1)

The LS1 cannot be safely bored out that much, or effectively at all. People running larger cubes either use a differant block or re-sleeve the LS1. Re-sleeving is basically adding new cylanders, jackets, and such.

If you're re-sleeving, there's little reason not to go even bigger than 4.0". But if you just want a 402, you can buy an LS2 block, which already has a 4.0" bore. LS6 heads will bolt right on to that, but there are better heads and certainly better cams to be had.

Do some searches and keep reading. Good luck!

Blue02Ws6

iTrader: (3)

Or you can get an iron block for alot less money and have it bored out for a 402 stroker kit, slp actually has them on sale for 2500 right now also.

jrp

iTrader: (16)

4.00" bore x 4.00" stroke 402ci. there's no boring done with the iron block

Blue02Ws6

iTrader: (3)

yeah not thinking. What is the most you can bore the iron block safely?

jrp

iTrader: (16)

.030 - .040, theres the rare block that can go .060. thats how 427's are done with an iron block. 4.060 x 4.125

black_knight

iTrader: (1)

Yeah, iron block is another way to go. Not my cup of tea because of the added weight, but plenty of people here have done it and the results speak for themselves.

skorpion317

iTrader: (8)

what heads should be used with the LQ9 block? LS6 or LQ9?

my aim for this project is over 500 HP on the motor alone, and still uses pump gas. I know the LS6 heads have higher compression, so i'm a little wary of using them.

skorpion317

iTrader: (8)

bump....damn, i had no idea this board moves this fast.

Blue02Ws6

iTrader: (3)

Depends on what you want your setup to be, you can use any of the lsx heads on the lq9 block.

skorpion317

iTrader: (8)

I'm not sure what type of compression the LS6 heads would make with the LQ9 block. If it's the standard 10.75:1 ratio (it's somwhere around there, right?) then that's fine, I'll just use those.

I want the engine to run on pump gas. here in New Jersey, we have 93 octane (most other states i've seen have 91 as their highest.) As long as it'll run on at least 91 octane, that's fine.

70 TA

For what you'd be spending on the stock LS6 heads your money would be better spent acquiring a pair of the new AFR heads.

Looks they are everything they were supposed to be and you know what they are gonna flow gauranteed.

I was thinking pretty much the same thing over the last year and waited for the AFR's to come out, now I'm waiting for the LS7 heads to come out

black_knight

iTrader: (1)

I hear that the LS7 heads will not be compatable with other lsX engines...

70 TA

Same bolt pattern and also based on the C5R head which also has the same bolt pattern. GM loves to keep things compatible for the most part.

I think obviosly you will need a block with a bore big enough for the 2.2" valve so the new 7.0L block will be a good thing to pick up at the same time as will the new LS7 intake

black_knight

iTrader: (1)

That's good news! What about the degree angle of the heads? I heard that was an issue.

70 TA

You mean the valve angle? I dont think that will be an issue either its also the same as the C5R head. I think the only thing you'll need is a big bore block and the LS7 intake to match the intake ports. Hopefully well have some more news soon.

Here's some nice pics someone posted in the LS2-LS7 section.

http://vorlon.case.edu/~aap8/gallery/c6z06media?page=4

skorpion317

iTrader: (8)

500+ HP on pump gas should be a reasonable expectation, right?