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 Post subject: H1 bore measurements...
PostPosted: Thu Apr 20, 2017 9:43 pm 
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Joined: Tue Jul 12, 2011 11:39 am
Posts: 31
Location: Cleveland, Ohio
Gathering my numbers to see where I am at with the top end. We'll call this the start!! I am really glad to be amongst you all again. I really missed this forum.

I was using a 3-point Browne & Sharpe--saweeet gage btw. Anyways I wanted a way to record my numbers, so I made up some worksheets, and used some blue dye to transfer the general location of the ports to my worksheet and boom. Now I have a way to see taper and diameters top to bottom of each jug.

I did 5 elevations, and took 4 measurements pretty close to each quad point (12, 3, 6, and 9 oclock).

Here's a collage.

Image

The number sheets are below for Right, Middle, and Left. To each one of these measurements, add 2.375".

Image

I left my spec sheets at work and will have to check the ranges, and not sure what the possibilities are for boring if I need to. Getting late so I will push through the numbers tomorrow, get some max mins, avgs etc.

EDIT: just found the specs on the resource site....2.3681" Service Limit. :problem: The pistons appear to be factory, cast, and are marked 0.50 on top. The skirts at the base measure approximately 60.44mm. So where do I go from here?

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PostPosted: Thu Apr 20, 2017 10:07 pm 
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Location: Rio Rancho, New Mexico
Geesh, bore it.......

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PostPosted: Thu Apr 20, 2017 10:20 pm 
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Location: Cleveland, Ohio
Ja-Moo wrote:
Geesh, bore it.......

Geesh... :lol: I needed to lose myself a bit tonight. Had a couple beers while grabbing some data. Thought about using the FARO arm at work just cause I can. In all seriousness what is the farthest or maximum one could bore these out to?

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PostPosted: Thu Apr 20, 2017 10:27 pm 
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You are at 1st over, with forged pistons you have 3 more overbores.

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PostPosted: Thu Apr 20, 2017 10:45 pm 
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Location: Cleveland, Ohio
:thumbup: :thumbup: 8-)

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PostPosted: Thu Apr 20, 2017 11:17 pm 

Joined: Mon Aug 06, 2012 2:57 pm
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Location: Monterey Ca
Depending on your cylinders. Sometimes you can barley get 2 oversized bore jobs out of 500. Sometimes they where not bored perfectly in the center. , one side thinner than the other. One side becomes razor thin.

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PostPosted: Wed Apr 26, 2017 2:23 pm 
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Location: Cleveland, Ohio
H1FR wrote:
Depending on your cylinders. Sometimes you can barley get 2 oversized bore jobs out of 500. Sometimes they where not bored perfectly in the center. , one side thinner than the other. One side becomes razor thin.


Thanks for the 'heads-up'. I found a local fella that's been in the biz for a long time, machinist by night and private business by day. Talked through the process with him and he's done lots of two strokes. Going to meet up with him this weekend so he can measure up the jugs, see what he has to work with and talk about pistons.

So I was originally going to go with Weiscos and found a couple threads about the forged Wossners. Are there any other players in the game?

I have a sticker in my shop...driver's married with kids, carries no cash. That being said, I'm on a bit of a budget. I'm not doing much to make s performance racing machine...are Weisco's sufficient?

I could be sold on Wossners...maybe you guys could help with some pros and cons, share relevant experience...thanks in advance.

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PostPosted: Sat Apr 29, 2017 6:25 pm 
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Location: Cleveland, Ohio
Well i met with my machinist today and got the jugs measured. Going to pull the trigger on a set of Wossners this Monday.I'm looking at a 1.00 over in order to achieve a solid cleanup.

One of the pistons was .oo7 over the skirt od...so these jugs were pretty worn.

Excited to finally be getting the top end done and get this project moving again.

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PostPosted: Mon May 01, 2017 12:09 pm 
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Location: Cleveland, Ohio
Wossners--ordered! ...now where is that tracking link...

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PostPosted: Fri May 05, 2017 12:25 pm 
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Location: Cleveland, Ohio
Pistons arrived at the machine shop earlier this week and he thinks he'll get to the jugs as early as next friday. Really exciting.

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