[959frontier]

Anybody check these sleeves out? Says they'll do a 100mm bore.

Darton Sleeves MID Nissan VQ40DE 100mm VQ40 Frontier : eBay Motors (item 170370498752 end time Feb-05-10 14:00:40 PST)

 

[Johnny912]

Looks interesting, I dont know much about motors even though I ripped mine all apart.
But anyone wanna take the plunge????? lol

 

[VoodooSaint]

Yeah what exactly is that and what does it do?

 

[rcr_kx250f]

it allows the bore size to be increased, which means more displacement, with means more power.

 

[959frontier]

Some extra displacement would be nice Was just checkin if anyone went this route yet.

 

[AndysLog]

?????no one else sees something wrong with this?

eh. ill wait.

 

[dubie2003]

Okay, I am dumb but why can't we just bore out our blocks to fit a 100mm piston? I know it has to do with cylinder wall thickness and everything but you would have to bore the block just to fit the sleeves.

Side Note: I always thought sleeves were only used on diesels, guess I was wrong.

 

[xterra hines]

Boring a block is much more cost effective then pushing in a sleeve. Your talking thousands of dollars just in maching work

 

[Ryan B]

?????no one else sees something wrong with this?

eh. ill wait.

The starting ID of the bore is actually smaller then stock? So you would have to machine the block, install the sleeves, then bore the sleeves just to get back to the stock diameter?

 

[BRUTAL]

You Cant Really Overbore The Stk Block More Than 20 Over. We Are Aluminum And Open Deck. None Of Which Is Good For Serious Power. The Sleeves Make The Block A Stronger Closed Deck Like The Gtr And Provide Stabilty For Forced Induction Or High Compression, And Alot Of It. And Thats A Good Price For The Sleeves And Having Them Do The Machine Work. Bore To 100mm And Offset Grind The Crank Useing Smaller 3.5 Rod Bearings And Custom Pauhter Rods And Cp Pistons And Youre Good To Go. Then Turbo It And Push It To 30 Psi That Would Be Enough To Beat Alot And Find The Next Weekest Drivetrain Part

 

[rcr_kx250f]

The starting ID of the bore is actually smaller then stock? So you would have to machine the block, install the sleeves, then bore the sleeves just to get back to the stock diameter?

That is done since it's a cast sleeve with imperfections. Boring fixes this and also creates a nice, rough surface for the rings to seat too.

 

[959frontier]

Wouldnt adding the sleeves strengthen our block? Ive heard we have a pretty weak block when it comes to boosting.


****Crap, read through the previous posts and brutal already wrote the answer. Shouda read through first!*****

 

[mustard23]

they are in SoCal... any one?

 

[roadracer4life]

Basicly what Brutal said.. if your intrested in making serious power "over 500whp" then going with a sleeved setup is the way to go.. and the other advantages are that you can over bore it beyond the safe limits of the stock block.. personally if i had a sleeved darton block i would leave it the stock bore and just turn up the boost to compensate for the lack of displacement..

-sam