The build that wasn't : V-Twin Forum: Harley Davidson Forums

klondike · 05-21-2005, 01:42 PM

Well man talk about beating a dead horse. My bike was to going to go into the shop on Mon for the BB, cam, and heads. Well the shop started to push my time back and now it seems they will have the bike for probably 3-4 weeks instead of 2. So I cancelled the build. The chief mechanic/owner said he could put the cam in a day and squeeze it in at the end of next week. But he is short of help, recovering from a broken collar bone etc. The guy that mahcines the jugs would have them for a good 2 weeks before he could get them back, and that was a maybe. So the fall it is with the cam being done in one day at the end of next week. Good weather is starting to arrive anyhow so maybe it is all for the best. I am bummed though. All that himmin and hawing and palathering for nothing. The cam that is going in is an S&S 510c that should be good for when I do my build in the fall. At least according to the mechanic. :sucks:

58GT · 05-21-2005, 02:57 PM

Bummer. Mine was done in a day but I supplied all the bits. Wouldn't it pay you to get some 1550 jugs? Can't be much dearer than boring out and you can sell the old ones after.

springer- · 05-21-2005, 06:09 PM

Actually boring your old jugs is better than buying new jugs. The old ones have been heat cycled and tend to hold the bore better than a set of "green" jugs. Plus why buy what you already have?

wyodude · 05-21-2005, 06:09 PM

Lots of folks plan to have this type of thing done in the winter. I had mine done in March of last year. Took a couple days.

klondike · 05-21-2005, 07:36 PM

Normally would take a couple of days. He is so snowed under now. He had 2 bikes on lifts and taken apart, a Chief sitting outside waiting to be rewired, and 3 other bikes in various stages of undress to be worked on. He is a vey popular shop and he is probably one of the best HD mechs around here. So I will wait till end of Sept or Oct when archery season starts to have the build completed. I will break out my longbow and head to yonder hills to make meat. thanks

csoday · 05-21-2005, 09:58 PM

Quote:

Originally Posted by springer-

Actually boring your old jugs is better than buying new jugs. The old ones have been heat cycled and tend to hold the bore better than a set of "green" jugs. Plus why buy what you already have?

I don't agree with that. I can see not buying something twice (except that I kept my originals for back up and I can always sell them). When you buy a new bike with a 95" or 103" engine you are getting cylinders that are green. Are you saying they won't hold a bore.

springer- · 05-21-2005, 10:05 PM

Quote:

Originally Posted by csoday

I don't agree with that. I can see not buying something twice (except that I kept my originals for back up and I can always sell them). When you buy a new bike with a 95" or 103" engine you are getting cylinders that are green. Are you saying they won't hold a bore.

No I am not saying that it won't hold a bore. But it is common knowledge that cylinders that have been in service hold up better.

here is a second opinion
http://www.v-twinforum.com/forums/sh...ad.php?t=55413

Psychoholic · 05-22-2005, 03:31 AM

'core shift'

csoday · 05-22-2005, 08:06 AM

In this case, I question "common knowledge"

machinist · 05-22-2005, 10:58 AM

I think its true with cast iron. We always seemed to get better engine life out our small block chevys if we started with used stuff.

swmnkdinthervr · 05-22-2005, 07:38 PM

Quote:

Originally Posted by springer-

No I am not saying that it won't hold a bore. But it is common knowledge that cylinders that have been in service hold up better.

here is a second opinion
http://www.v-twinforum.com/forums/sh...ad.php?t=55413

I raced limited sportsman a number of years ago (large number) on a tight budget to boot...what I do KNOW is that a set/block of seasoned cylinders freshened up will out last new. This is common knowledge with ALL racers except those putting out so much HP that to use any cylinders more than a couple of times would be foolish...can you say nitro...

**HDWRENCH** · 05-23-2005, 02:45 PM

I do not like the SE cylinders as they do not bore them to fit pistons that they are putting together as a kit. As for the cylinders not uncommon to measure them and find 7-9 thou taper. And cylinders that have been heat cycled are better as they are done moning around. I will measure some of the take off I have and I also can get measurments on SE 95 cylinders and you will find that the new ones are not as uniform. Now I would be curious to to measure a set after say 1000 miles and then re-measure to see where they are at then. I recall on the early 95 kits that we had several kits that ened up sticking a piston after a short period of time. Have not seen that since though.

58GT · 05-23-2005, 02:53 PM

So get some used ones that have been bored. Or some used 88's and get them bored before you strip the other motor. At least you're still riding while they're being bored.

Lardog · 05-23-2005, 03:10 PM

Realistically, it is a situation of which is better and which is good enough.

Obviously, new factory barrels will almost certainly work well, especially when paired with factory pistons. In short, they are "good enough". Conversely, many expert builders will tell you that boring seasoned barrels and matching to pistons is better, and for a variety of good reasons. However, it all comes down to how you want your build to be and whether or not you are satisfied with good enough or if you will only be happy with the best. Of course, in many instances, cost is also a factor in making this decision, in addition to the expectation of having quality work performed and not ending up with a job done incorrectly.

For me, boring my stock barrels was about 1/2 the price of buying new ones and I didn't have to deal with the hassel of trying to sell my old ones on eBay to make up the difference.

Kags · 05-23-2005, 04:16 PM

Sometimes its about "how quick do I want it" along with "if its good enought". Anything short of a street srtip high HP ride most likely new 95" are fine. It was good enought for my 86HP 96TQ set up with H-D cast flat tops.I had no down time waiting for any shop. I got 35K on it now. That skirt coating goes along ways piston/cyl life for most of us. If your after a blueprinted motor better have a shop bore your 88's out.