Builder

Steve, I am putting together my specs for a road-course car. It will operate in the 3000 to 7600 RPM range for extended periods. I would like to make 650(+) NA-FWHP on 91 pump gas (I know I am reaching). What displacement and block type would you suggest. I don't want to use forced induction or spray.

ls1290

iTrader: (20)

Holy Jump for Jesus!!!!! There is not much thickness between those cylinders.

Keith

Steve - Race Eng

iTrader: (1)

The new Darton LS2 dry sleeve will work fine for your needs. If you went to the MID, the track would most likely not let you run the required Evans coolant. The MID wet sleeves would rust from pure water.

Steve

Ben R

Looks killer Steve!

Steve - Race Eng

iTrader: (1)

We have 4.400" center to center to work with. With the body of the sleeve at 4.325" we have .075" aluminum between the sleeves. Once the sleeves are installed at max. bore of 4.160", there is .240" of ductile iron and aluminum between the cylinders.

We run the import engines with a lot less aluminum between the dry liners with no problems.

I just learned that one of the teams racing the VQ35 Nissan V-6 with Darton MID liners I installed surpassed two thousand horsepower on the dyno. You guys have some catching up to do!

Steve

Steve - Race Eng

iTrader: (1)

Just wanted to follow up on my last response. We can get away with thin cross sections between the cylinders because of the tremendous strength of the sleeves.

I have attached a photo of a Darton sleeve that has been squashed in a press. Note that it is not cracked or broken in any way. Try that with ANY other liner and it would shatter into pieces. Really tough stuff and not easy to machine either!

Steve

mikey

iTrader: (6)

Just imagine if they made aircraft out of that stuff. Might take my fear out of flying...haha

Beast96Z

iTrader: (21)

I know this may be a dumb question, but how would the dry sleeve LS-2 compare with a dry sleeve LS-6? Both having the same finished bore of 4.125?

Steve - Race Eng

iTrader: (1)

The earlier blocks, LS1, LS6, & 5.3 all had a coolant passage between the cylinders from about a half inch from the deck surface extending about two inches down (photo attached). This area got very thin or broke through on the early blocks when sleeved for 4.125" bore. Darton makes a dry liner for the early blocks but max. bore is limited to around 4.030". They made the outside of the sleeve 4.180" to leave sufficient aluminum in the weak area between the cylinders.

The LS2 block does not have that coolant passage. It is solid aluminum between the cylinders. Also the diameter of the parent aluminum cylinder wall has been increase in the LS2 by .200" to 4.800". That leaves almost a quarter inch of aluminum surrounding the new Darton sleeve.

Steve

Dbluegoat

so with a 4.125" bore you could make a LS2 427 correct? What are the chances of a sleeve dropping?

barkingspud

iTrader: (3)

The sleeve has a flange so, it can't drop. check out post #1... And yes, 4.125" bore with a 4.00" stroke =427

LASTLS1

iTrader: (7)

Anyone that doesn't have Steve@ race engine do thier sleeved block is NUTS! Trust me on that one!!!!!!!!!!!!!!!!!!!!!!!!!! I had two go bad. Steve went WAY out of his way to help me get my new block repaired. I didn't even buy the block from him, or anything for that matter. I can't imagine what he wouldn't do for one of his customers. Thanks again!

Beast96Z

iTrader: (21)

OK, so for someone that dosen't have a core for a LS-6 or LS-2, the prices will be initialy the same between the MID/LS6 and the LS2/dry, but the MID will be stronger correct? How much would it cost me to get either outright?

jrp

iTrader: (16)

cost for the ls2 dry sleeve finished ready for final hone should be around 2800, including the price of a new ls2 block and the stresss relief.

this new ls2 dry sleeve is really the most economical route for displacement for street/strip use.

Beast96Z

iTrader: (21)

I just don't see the economical aspect of it. Maybe I'm missing something, but isn't that about the same price as a MID LS-6 block?

jrp

iTrader: (16)

MID is ~3500 ready for final hone of the top of my head, im sure steve will correct me if im wrong. unless you can show me a block with the potential for 4.1600 bore for under 3k, it fits the bill of the economical route bar none.

when ls2 blocks become more plentiful and worn in, the price will be bit cheaper as stress relief wont be required and you wont be paying full price for the block.

again, this if for street/strip. for the guys who want to run large amounts of boost or n2o your better off spending the doughh on the wetsleeve. which in itself is a good deal considering its stronger and more stout then the c5r block at half the cost.

Beast96Z

iTrader: (21)

Thanks, I was unaware the wet sleeves were that high.

SLED28

iTrader: (7)

Not to burst a bubble, but we have been dry sleeving like this since 1999. Our dry LS1 Block has ran 8.51@168 a long time ago. I couldn't imagine our LS2 blocks at double the sleeve thickness we now use (AND also thicker then a Alloy Donovon 4.600 block!). I kept telling people they couldn't drop......in a way more cut to the chase though Our Iron sleeves are incredibly expensive for a bulk tube and very hard for my sleeve supplier to keep in stock due to price/availibilty.
Thanks
Dave

jrp

iTrader: (16)

not to burst your bubble but with ARE's track record i wouldnt purchase anything from them irregardless of price..

SLED28

iTrader: (7)

I ain't looking to sell, just stating some facts