Posted By: alpha727
sleeve a 318 and bore to 340 - 03/25/10 10:46 AM
Just curious if you could sleeve a 318 then bore it out to 4.04 or higher. Thanks.
sleeve a 318 and bore to 340
Posted By: racincuda
Re: sleeve a 318 and bore to 340 - 03/25/10 11:53 AM
Havent priced sleeves lately but it used to be around $100 per hole + boring.
You could probably talk me out of my 69 340 block for less than that, or quite a few others I would guess.
But hey if money is no object then go for it !
oh and pick up a stroker kit to go with it as well
You could probably talk me out of my 69 340 block for less than that, or quite a few others I would guess.
But hey if money is no object then go for it !
oh and pick up a stroker kit to go with it as well
Posted By: bigsbigelow
Re: sleeve a 318 and bore to 340 - 03/25/10 12:17 PM
I don't think it is a bad idea. The motor will have really strong cylinder walls if you decide to do it. 
Posted By: Scamp408
Re: sleeve a 318 and bore to 340 - 03/25/10 12:42 PM
Just buy my X block LOL
Posted By: 70Cuda383
Re: sleeve a 318 and bore to 340 - 03/25/10 03:18 PM
I'm sure it could be done, but is the cost worth it? average cost a few years ago for sleeves was $100 a hole...not sure if that's gone up or down in the past year or so, but if you figure that, plus the cost to machine the sleeves afterwards...you're probably looking at $1,000-$1200 to turn a 318 into a 340. how much would a 340 block run you at the swap meets, online, etc.?
Posted By: moper
Re: sleeve a 318 and bore to 340 - 03/25/10 03:35 PM
You really need to sonic test it first. It may be able to be bored to 4" (360 size...), but you have to have a little meat to give the sleeve some stability. I'd be concerned about leak posibilities by doing that on all 8. A std 318 type wouldnt concern me. But removing that much wall structure does.
Posted By: 5spdcuda
Re: sleeve a 318 and bore to 340 - 03/25/10 03:44 PM
Just buy a junkyard 360 [ $50.00-$100.00 in my part of the world ]. Almost any 360 can be bored .030 without checking and many can go .060+. .040 over 360 = 367 cu. in. vs 4.04 bore 318 = 340. 360 = low cost, more cubes. Sleeved 318 = high cost, fewer cubes.
Posted By: Cab_Burge
Re: sleeve a 318 and bore to 340 - 03/25/10 05:21 PM
Quote:Don't do that
Just curious if you could sleeve a 318 then bore it out to 4.04 or higher. Thanks.
Buy a good 360 block and go from there
Posted By: rebel
Re: sleeve a 318 and bore to 340 - 03/25/10 05:55 PM
one of my racing buddies has done this. he still tells people it's a 318. at $100 a sleeve you guys pay too much, down here with our $ conversion we're paying the equivilant to $60usd for HD sleeves they fit to diesel bulldozer engines.
Posted By: The Nutcracker
Re: sleeve a 318 and bore to 340 - 03/25/10 06:04 PM
My 340 was sleeved on al 8 when i bought it,
Makes stable cylinderwalls. I like the idea of a sleeved 318 stroker, tell people its a stock 318!
Makes stable cylinderwalls. I like the idea of a sleeved 318 stroker, tell people its a stock 318!
Posted By: rickstershemi
Re: sleeve a 318 and bore to 340 - 03/25/10 10:14 PM
Supposedly there is a 318 block that was manufactured in the late sixties for two years only that some have successfully taken to 100 over...but can't remember the years or block # .... ??????
Rickster
Rickster
Posted By: domingo
Re: sleeve a 318 and bore to 340 - 03/26/10 12:50 AM
buy a race block. They are not that expensive.
Posted By: 340_Dart
Re: sleeve a 318 and bore to 340 - 03/26/10 03:39 AM
Quote:
buy a race block. They are not that expensive.
Even if you can get a 340 out of it, you still won't have thicker main journals, or 4-bolt mains like most race blocks have or can be fitted with.
Posted By: emarine01
Re: sleeve a 318 and bore to 340 - 03/26/10 02:18 PM
I don't know what the industry standard is for remaining wall thickness for dry sleeves < how far you can bore to fit the sleeve> I don't think the sleeve is structurally strong by its self, the sleeves have some benefit in ware from the rings vs the cast iron block but I don't think its a cost effective way to increase bore
Posted By: moper
Re: sleeve a 318 and bore to 340 - 03/26/10 03:39 PM
Quote:
I don't know what the industry standard is for remaining wall thickness for dry sleeves < how far you can bore to fit the sleeve> I don't think the sleeve is structurally strong by its self, the sleeves have some benefit in ware from the rings vs the cast iron block but I don't think its a cost effective way to increase bore
That was what I am thinking... Sleeving a block with the normal type of sleeves will leave material behind to help stabilize things. Removing all the original cylinder material I think would not support the sleeve or deck well enough. Never mind the cost/return issue.