Engine and Transmission Tech

Hey guys. I started thinking about liners because Mike wasn't talking. I figured I'd look for some potential options.

One is Darton manufactured "blanks":

A longer 3.7" liner that would work great for the monster stroke 350 Rover:
T-3750 3.700(bore) 3.975(OD) 0.138(thickness) 6.100(length) 0.650(flange) 4.250(flange dia.)

6.1" length is an extra 3/4" longer. Good news there.

On another thought, going just a touch bigger but not all the way to 4":

TA performance 3.8l replacement liners for their custom race block.
OD: 4.100
Flange Height: 0.3230 - 0.3240
Flange Dia: 4.340
Total Height: 6.000

Not bad. That makes the wall thickness 150 thou. Not sure how much block is left with 4.1" bored out of it. With this sleeve though we could use the later supercharged 3800 pistons with the 6" honda rod and an offset ground 4.6 crank to 3.52" stroke. That would make a 5.2l Rover.

Just thought I'd start the ball rolling.

Problem with the "bigger" liners is how do you make a thinwall, "wet liner" work in a paper mache block, previously designed for dry liner, work? Drag only motor- no problemo, fill it with "Hardblock". In the real world-Mike or Nic ?? roverman

OK, You guys are converting me! Check out www.mellingcylindersleeves.com and download/print their catalog. They are primarily to repair cast iron blocks,but I think that being thinner they would preserve some strength in the block. In adition to their catalog they accept custom orders for high performance flanged liners! I bet their prices are much better than the afrtermarket,plus if you order them through a auto shop you could get a discount.



Edited 2 time(s). Last edit at 12/19/2009 12:18AM by mgb260.

How thick is the stock liner? Or could you bore out the stock liner and put a thin liner inside? You could bore bigger at the top for the flange. I don't know if its possible,just a thought.

Nice, Jim. I remember a few years back I was looking at melling but they didn't have online catalogs. I had totally forgotten about it. Thanks!

OK so peep those 3.8" sleeves with the .094" thickness. Those are only 88 thou bigger OD than the westwood liners I bought. Could work good. Doesn't look like they have flanges though...

Yeah, but they say they can make custom liners and their Hi performance ones have flanges. Nic, what do you think about boring out the stock liners as much as you can and putting thin liners,iron to iron. How thick are the stock ones?Outside diameter?You could leave a flange on the bottom of the original and have the new liner .002 high for an O ring. I'm thinking the newer 4.6 Rover might be a good block since it already has the 300 main bearing size and larger bore to start with.



Edited 3 time(s). Last edit at 12/18/2009 11:07PM by mgb260.

Yeah. I'm thinking the 4.6 is the only option for trying to retain some block around a larger liner because of the better standards applied to the casting process. Either way it's still a gamble, one I'm probably willing to take.

The 4.0 was prone to cracking because of the attempt by Rover to control emissions with higher operating temps. I guess if I was going to hog out the whole liner for wet liners I'd use a 4.0. Might as well. Like Tony said, Sure fixes the cylinder cracking problem! LOL

I don't think there is any advantage to the thin liner inside the other iron liner.

Leaving the liner proud by a few thou is always a good idea for better sealing.

Could be custom liners are the only way to get what we want.

I suppose the pivotal point here is dry or wet? Either way, sensible amout of block filler should help. Maximum heat and pressure,(combustion), occurs approximately up to only 15 deg. atdc. Herman Lewis,master guru of AMC V8's, claims they run "cooler" with block filler ! Whoudda thunk? If your pushin the, paper mache envelope, you'll use-up some paper. When asked about all the 215's that were "wounded" in develpement for "Indy", Mickey Thompson replied," If your gonna teach a cat to live with canaries, your gonna use-up a few canaries". Long may he race. roverman.

That's a good point. Get a block and see what happens. I dig...

OK. I think I'm hearing you now. You're saying go ahead and fill the block like halfway up the cylinder or whatever distance. I bet that would help the rigidity... Interesting....

"Herman" fills to bottom of h2o pump ports. I thinkin, reduce block volume by 50% increases velocity by like amount? Drag racers been, "groutin" forever. A Mid-West, Pro-Stock racer, code named-Bubba, uses the stuff to make a "Mondo" bore motor with replaceable dry/flanged sleeves.He merely greases em., before-the-pour ! Hey Mike... I'm tellin-all ! roverman.

Nix-See how I give you the will to do some investigating! Its a blast trying to figure things out. I really dont know what the liners are but the machinist told me if they work he will spill the beans.

Damn machinist! Why do they halft to be so tight lipped?? "The Chipmaker"

I dont know but I think it is the mentality of it works here you go and he is the hero. If it does not then well it was a strupid idea and less I know the better to not dig into it! Smart move.

Regardless of whether it works: What's the OD of the liner? I'm just wondering how large puts us into the wet sleeve territory.

Anybody else can take that too. It could be no larger than 3.9". It would be nice to get out to 4.1" or something before cutting through.

Nic, It's "out-there". That special process, per alien unit is $131. They "may" in landings of 8. No spillin-Nic.

OK. Interesting. I haven't forgotten about that either. I figure a 4.0 with cracked cylinder walls would be a great candidate. From what we were talking through I don't think that would even need block filler although if it indeed helps the engine run cooler it may be worth it.

So by "unit" are you saying the whole assembled part? That would be frickin' amazing. Or are you saying per hole.



Edited 1 time(s). Last edit at 12/21/2009 04:59PM by NixVegaGT.

Nic, Closely guarded, alien technology, don't come cheep ! It's each, finish honed. There's always "Ian of Wales". roverman- senior groopie.

Hey, junkyard shoppers,4.5/4.9 Cadillac wet liners just wiggle out of block.Stock bore is only 3.623 but commonly overbored to 3.66(Northstar-to make 5.1) I wonder if there is enough meat to go 3.8? Here are some pictures of some bored for 3.66 Northstar pistons.






Edited 1 time(s). Last edit at 12/21/2009 11:04PM by mgb260.

Jim, If ever-a-liner, "begged" for block filler? Any of those Caddys have alum. heads? 4 bolt mains?.Bore spacing is ? Thanks, roverman.