I under stand if you can not go bigger. But it sounds like some put sleeves in even if they have room to bore more.
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What is the advantage of putting sleeves in and going back to standard.
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Without something detremental like a cracked cyl wall or the last boring job that put the cyl's badly out of line I would not sleeve. No replacement for displacement. JMHO. Rod"Much of the social history of the Western world, over the past three decades, has been a history of replacing what worked with what sounded good." Thomas Sowell
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Possibly, Ray, but even without sleeves I always hone my cylinders out to .0035 cyls 1 and 2, and .0045 cyls. 3 and 4.
As far as I am concerned, you would never be wrong to hone them all to .0045 sleeves or not.
And as you know, we have built a lot of motors here, and not just Model A. I have never experienced piston slap in any motor we have ever built
Note, we are most always using cast pistons in an A.
If this were a case of forged pistons, which we are putting in the '47 Stude, then the manufacturer will tell you the clearance, and you will be able to believe it, since forged pistons do not expand as much. More pricey, tho. Instead of 100 bucks a set, think 1000 bucks a set.
For forged, think Ross pistons, etc, and not these no-name jewels we get from the suppliers. For a Model A, I actually use a piston supplied by Egge, at 250 bucks a set, and will use no other.
Those little slips of paper that come with the cast Model A pistons that say 'use .002' lieLast edited by tbirdtbird; 01-19-2018, 10:56 PM.
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Like a bore job,the sleeve is only as good as the guy setting it.Been around wet and dry liners for years,dry pressed in are fool proof.Gives a block as second life,and acts like a pin with any cracks.
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How much smaller do you recommend boring the block then the sleeve OD size?Last edited by George Miller; 01-20-2018, 11:19 AM.
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Originally posted by tbirdtbird View PostPossibly, Ray, but even without sleeves I always hone my cylinders out to .0035 cyls 1 and 2, and .0045 cyls. 3 and 4.
As far as I am concerned, you would never be wrong to hone them all to .0045 sleeves or not.
And as you know, we have built a lot of motors here, and not just Model A. I have never experienced piston slap in any motor we have ever built
Note, we are most always using cast pistons in an A.
If this were a case of forged pistons, which we are putting in the '47 Stude, then the manufacturer will tell you the clearance, and you will be able to believe it, since forged pistons do not expand as much. More pricey, tho. Instead of 100 bucks a set, think 1000 bucks a set.
For forged, think Ross pistons, etc, and not these no-name jewels we get from the suppliers. For a Model A, I actually use a piston supplied by Egge, at 250 bucks a set, and will use no other.
Those little slips of paper that come with the cast Model A pistons that say 'use .002' lieLast edited by Ray Horton; 01-20-2018, 11:50 AM.
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Excellent thread, and a good read. Thank you, for starting this conversation. Jeff
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Brent, of course this is VERY true:
"With regard to bore clearances, I believe someone needs to clarify these numbers suggested above are to be calculated off of actual piston sizes"
Not everyone has the proper equipment to take these measurements or even a dial bore gauge to truly know the cylinder bore accurately. This stuff is often better left to a qualified engine builder
Ray, I am glad that your engine troubles are over! You had enough misery
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- BRENT in 10-uh-C commented
- Today, 07:36 AM
Do you know who the piston manufacturer is that is putting those slips of paper in? I use Pistons coming from Snyders (-which don't come with any paper slips), and I have always wanted to heat a piston in an oven and then measure it to verify the amount of thermal expansion it actually has. It would be interesting to compare the two pistons to see if the pistons that come with the paper slips has similar expansion rates.
- Today, 07:36 AM
What do you set your piston to wall clearance at on the Snyder pistons? Do you keep them all the same or add more for 3 & 4?3~ Tudor's & 1~ Coupe
Henry Ford said,
"It's all nuts and bolts"
"Start by doing what's necessary; then do what's possible; and suddenly you are doing the impossible."
Mitch's Auto Service ctr
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- BRENT in 10-uh-C commented
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Cylinders are bored out from Standard to 0.125.
What are the pros and cons of each:
Standard:
0.020:
0.030:
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0.125:
Thanks.
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by Ray HortonUpdate for those who have helped with suggestions on my overheating problem:
I took the block and pistons into Portland Engine Rebuilders today and told them they needed to hone to .0045. I explained that it all seems to have come down to the issue of the sleeves not transferring heat like a simple bore of the block, combined with the already questionable water distribution in the block....-
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