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Something to keep an eye on...

If they don't have a release date, then nobody knows. Unless it's ready now.
 

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I emailed them over the weekend. Here's their reply:

Hello David,

The sleeves are available and custom made to order.

Let me know if you would like to order a set.

Thanx,

John
 

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Soo... gains? What do they actually do? I cant see how they can work for NA and FI applications.. seems like NA is better to increase compression and FI is better to reduce it..
 

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Sleeve kits just increase the bore diameter of the engine. In other words, there's more space for air and fuel, which can be very very helpful for F/I applications. These sleeves might also be stronger than the OEM sleeves, which would decrease your risk of detonation under high boost. I'm not so sure what kind of gains you would get, or why you'd want to do this if you weren't going F/I... but I'm sure someone out there can help.
 

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Yeh. I'm sure these are stronger than the stock sleeves...& allow a larger bore, 'cause we all know there's no substitute for cubes....

I bet this setup is EXPENSIVE. Perhaps worth it if you have BIG f/i plans, though....
 

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you would get no gains from sleeving your block....the advantages of sleeving your block is you dont have to worry as much about a rod going through your block:)

the disadvantage is sleeve sinkage....if the sleeve isnt installed properly it can sink or drop lower in the block and that means you have a ruined block.....

the stock block is supposed to be very strong and handle approx. 800hp but I dont think that has been proven yet....

you could sleeve your block and use either higher compression pistons for a mean N/A engine or lower compression pistons if you are going F/I....

hope this helps some...
 

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the sleeves that are offered by darton are closed decked sleeves. the stock are open deck. the benifits of the closed decks sleeves are that they are stonger to take the more boost you put on it. what everbody doesn't understand is that after you put pistons and rods in a 350 the block sleeves can only handle 550 hp. after the sleeves the motor can handle 800 to 1000hp. only because the sleeves move under the higher HP that you need after market sleeves. and for all motor cars. same almost. the if you have you motor modded to handle higher rpm's the stock sleeves some times will move. which will cause the motor to fail. but most of the time that a all motor guy gets sleeves is to go to a larger bore. a lot larger bore. not no little .20 over talking 82 mm to 84 mm bore. hope this clears anything up.
 

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Originally posted by SmoothZ@Dec 20 2004, 03:31 PM
I emailed them over the weekend.  Here's their reply:

Hello David,

The sleeves are available and custom made to order.

Let me know if you would like to order a set.

Thanx,

John

No price quote?

Hopefully they won't be as expensive as the AEBS sleeves.
 

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Originally posted by topspeedjason@Dec 30 2004, 11:06 AM
those prices are installed right. or not installed.

That price if just for the kit.Darton wants another $1000 for install..Any machine shop could do it however but the pricing seems about average.
 

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stock block will handle the power very well... and for the money you are paying for the sleeve you can get another bare block... you will also have to find a shop that knows what they are doing, i've seen a lot of cases where failure was caused by poor machine work which causes the sleeves to fail.
 

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Discussion Starter #16
Originally posted by bio911@Jun 27 2005, 05:04 PM
stock block will handle the power very well... and for the money you are paying for the sleeve you can get another bare block...  you will also have to find a shop that knows what they are doing, i've seen a lot of cases where failure was caused by poor machine work which causes the sleeves to fail.
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For 600+rwhp on a daily driver, I recommend sleeves until we have more research to show that the stock sleeves can handle that continuous load over time. You can find a block for $2,000? Rolling shortblock or just a block? Not with the 350Z, specifically Darton sleeves.
 

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vq35de darton sleeves have been available on ebay for a couple of months, as i found them right after my girlfriend got her car, and was checking out the aftermarket for it.

The sleeves increase the bore to 95mm, and can be punched out another 5mm to 100mm. They wants $1050 for them, and offer a sleeving service for another $1000 or so, and then pistons to fit the holes. Overall, a pretty expensive setup, but if you already spent a bunch of money on a turbo kit or something I guess sleeving the block is pretty cheap insurance. The resultant displacement of using a 100mm bore is listed as 3.9L - huge!!

http://cgi.ebay.com/ebaymotors/ws/eBayISAP...sspagename=WD1V

theres a current ebay auction - price listed at $1050. they claim that the sleeves have been tested to 40psi boost, so it would be worth checking into. If any of my info is in error, please let me know. thanks

- Bryan
 
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