355ss

iTrader: (9)

I have a Ls2 that has needs one of the sleeves replaced. I am thinking about sending out and having all new sleeves installed and going with a 4.125 bore and stock stroke. Has any one else done this? I think that the larger bore and more cubic inches are going to make the L92 heads work better than being on a 6.0???

blu00rdstr

I'm also considering L92s instead of Stage 2 CNC'd LS1 heads on my 4.125" block. I'm unsure if stock L92s will perform that much differently than ported LS1 heads.

Mikey 97Z M6

iTrader: (37)

My 387 all-bore engine will be getting L92's. The guy that owned this 387 shortblock before me had some heavily ported TEA LS1 style heads that put down 473rwhp on a mustang dyno. Should be real interesting to see how the L92's do in comparison.

You planning to go with dry sleeves or wet?

Mike

355ss

iTrader: (9)

I haven't looked to much into the differences in dry or wet sleeves so I am going to start researching it tonight. I have read that the darton sleeves are the way to go.

NemesisC5

Should make for a great rpm motor and VERY responsive ! !

93TAWicked1

iTrader: (28)

I'm the one who sold the 388 or 387 or whatever it was, I liked it, I had 317's that flowed similar to ported L92's except better on the exaust side and smaller runner. I made that 473 with a smaller cam and an LS6 90mm intake setup. The car moved and loved to rev, the only thing is if you are going to buy a 2600 block and 550 pistons, 500 rods, whats another 1000 for a 4 inch crank? Of course that kind of thinking is what got me into my current predicament.......

Sharpe

iTrader: (7)

Wouldn't it be more to sleeve a block than to just buy an L92 block and bore it? Maybe not. I wouldn't know.

blown4.6

I bet you will be able to rev that thing to the moon, with proper valvetrain of course.

NemesisC5

Any valvetrain recomendations ?

racecar

Short stroke big bore motors rev quick and make big power in a narrow peak range.
That would be an awesome motor with great top end power, it will have low end power, but it won't have the killer low end torque of a 4" crank.

Greg Fell

iTrader: (9)

Steve @ R.E.D. does not like the L92 block for resleeving.

blu00rdstr

I had an email conversation with Steve @ R.E.D., great guy!

Dry sleeves on an LS2 are much less expensive than wet sleeves on an LS1, and LS6 blocks are not recommended for a resleeve.

R.E.D. provides LS2 dry sleeves in 4.125-4.190", but not bigger than 4.150" for FI or nitrous. I've seen Darton M.I.D. sleeves on ebay selling for $1,400, but for $260 more you could have your LS2 sleeved which includes stress relief work.

NemesisC5

So how much $$$ for a dry sleeved 4.125" LS2 ???...Or is it less expensive than buying the LS7 block ?

blu00rdstr

I found an LS7 block for $2,366 from gmpartsdirect (list price is $3,250). I'm unsure if an LS7 can be resleeved or bored much. I'm unsure, but I think a dry oil sump system is needed.

If you have an LS2 block, R.E.D. will stress relief the block, install sleeves, and deck the block for $1,670 (top secret info I got from Steve). $120 for stress relief, $800 for sleeves with installation of $750. Sleeves can be replaced in a sleeved block, and bore can go to 4.190".

Ryne @ CMS

iTrader: (10)

yeah my l92 block was the first l92 block he resleeved, he got it done perfectly, but he said the sleeves were in the block crooked, especially number 7 cylinder i believe.

355ss

iTrader: (9)

Does anyone have any insight on how the l92 heads perform on a 4.125" bore vs the smaller 4.00"

NemesisC5

I've heard this MANY times, is the quality starting to improve?..If not it seems like LS2 or LS7 are the way to go