Darton large bore LS2 dry sleeve is here!
TECH Regular
Joined: Nov 2004
Posts: 415
Likes: 0
From: Reno, NV
Originally Posted by Steve - Race Eng
There is no possible way for you to crack these sleeves. The aluminum block deck surface however my become overheated and softened with high boost and or nitrous. Remember, there is no coolant passage between the cylinders on the LS2 blocks. I highly recommend you using an MID wet sleeve LS1 or LS6 block instead which is bullet proof if done correctly. Darton will have an MID kit later this year for the LS2 by the way. The 4.200" MID wet sleeve for LS1 LS6 engines will be available shortly.
Thread Starter
Joined: Mar 2003
Posts: 739
Likes: 177
From: Oceanside, Ca.
Engine for road course 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
Steve
Originally Posted by 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.
__________________
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
Thread Starter
Joined: Mar 2003
Posts: 739
Likes: 177
From: Oceanside, Ca.
Bore centers 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
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
Originally Posted by ls1290
Holy Jump for Jesus!!!!! There is not much thickness between those cylinders.
Keith
Keith
__________________
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
Thread Starter
Joined: Mar 2003
Posts: 739
Likes: 177
From: Oceanside, Ca.
Strength of Darton sleeves 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
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
Originally Posted by ls1290
Holy Jump for Jesus!!!!! There is not much thickness between those cylinders.
Keith
Keith
__________________
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo Thread Starter
Joined: Mar 2003
Posts: 739
Likes: 177
From: Oceanside, Ca.
LS2 vs. LS6 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
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
Originally Posted by Beast96Z
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 Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
Steve Demirjian
Race Engine Development
Oceanside, Ca.
760-630-0450
web: www.raceenginedevelopment.com/
e-mail: race-engine-development@***.net
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! 
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! 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?
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.
this new ls2 dry sleeve is really the most economical route for displacement for street/strip use.
Originally Posted by jrp
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.
this new ls2 dry sleeve is really the most economical route for displacement for street/strip use.
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.
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.
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
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
Originally Posted by SLED28
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
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