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  #16  
Old 09-16-2007, 10:25 AM
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longassname longassname is offline
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I measured my pistons and bores:

bores.....

1 top 3.81** & 3.81**
1 bottom 8.81**
3 top 3.81** & 3.81***
3 bottom 3.81**
5 top 3.81*** & 3.81**
5 bottom 3.81**
2 top 3.81** & b3.81**
2 bottom 3.81**
4 top 3.81** & 3.81***
4 bottom 3.81**
6 top 3.81** & 3.81**
6 bottom 3.81**

pistons are all 3.81** to 3.81**

doing the math the side wall clearances are:
1 .00**
3 .00**
5 .00**
2 .00**
4 .00**
6 .00**

Last edited by longassname; 08-06-2008 at 09:43 AM.
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  #17  
Old 09-19-2007, 08:01 PM
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longassname longassname is offline
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My heads, pistons, and valves are officially on their way for coating. Fedex picked them up today.
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  #18  
Old 09-25-2007, 01:41 PM
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longassname longassname is offline
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I've gotten some .50mm oversized high silicon aluminum main bearings coated which are on their way back to me now. I'm waiting on them so I can cage them and get the measurements to have the crank shop machine the crank to.

They are in the process of coating the pistons, heads, and valves now. I'm sure I'll end up waiting on the crank.
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  #19  
Old 09-27-2007, 10:18 PM
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longassname longassname is offline
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bearings are here. I'll cage them tomorrow and send my crank out to be redone on monday.
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  #20  
Old 09-28-2007, 06:14 PM
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longassname longassname is offline
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I caged the new bearings.

Journal# bearing bore oil clearance journal size
1: 2.34*** .00** 2.34**
2: 2.34*** .00** 2.34**
3: 2.34*** .00** 2.34**
4: 2.34*** .00** 2.34**
5: 2.34*** .00** 2.34**
6: 2.34*** .00** 2.34**
7: 2.34*** .00** 2.34**

Now I can send the crank back to get straightened and ground to journal sizes I'm specifying based on caged bearing measurements.

Last edited by longassname; 08-06-2008 at 09:45 AM.
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  #21  
Old 10-02-2007, 08:03 PM
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fedex says my crank was delivered to the machine shop today. Hopefully they get right on it.
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  #22  
Old 10-15-2007, 09:12 PM
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still waiting on that crank....
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  #23  
Old 10-16-2007, 01:05 AM
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Dessertrunner Dessertrunner is offline
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Though you must of left town, can't wait for the next installment.
Tony
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  #24  
Old 10-19-2007, 09:02 PM
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I'm dropping the heads and valve train parts off for the valve job, assembly and final cleaning. I took some pictures of the coated parts while they are still seperate parts.



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  #25  
Old 10-25-2007, 06:53 PM
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Myxalplyx Myxalplyx is offline
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Long,

The valve job you are doing. Would this be similar to what DPR racing does for the Honda engines? What they call it...a 5 angle valve job. I remember reading up on that years ago in magazines like Sport Compact Car. Was a big thing then for naturally aspirated engines. It was done so air could travel past the valves smoothly without the corners of the ports hindering the flow. Made a big difference on their flow bench.

I went on their site last week and found they did some cylinder head work for Subarus. Probably the Impreza mostly. Poked around the site due to some ideas. Looking forward to seeing how this build goes.
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  #26  
Old 10-25-2007, 08:15 PM
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no, it will be a redux of the factory valve job.


Quote:
Originally Posted by Myxalplyx View Post
Long,

The valve job you are doing. Would this be similar to what DPR racing does for the Honda engines? What they call it...a 5 angle valve job. I remember reading up on that years ago in magazines like Sport Compact Car. Was a big thing then for naturally aspirated engines. It was done so air could travel past the valves smoothly without the corners of the ports hindering the flow. Made a big difference on their flow bench.

I went on their site last week and found they did some cylinder head work for Subarus. Probably the Impreza mostly. Poked around the site due to some ideas. Looking forward to seeing how this build goes.
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  #27  
Old 10-26-2007, 07:38 AM
cdigerlando cdigerlando is offline
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Quote:
Originally Posted by longassname View Post
I caged the new bearings.



Now I can send the crank back to get straightened and ground to journal sizes I'm specifying based on caged bearing measurements.
Are these the oil clearances you are specifying or are they the clearances you measured, and you are shooting for more clearance?
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Last edited by cdigerlando; 08-07-2008 at 05:01 AM.
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  #28  
Old 10-26-2007, 09:41 AM
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those are the journal sizes I am specifying to obtain those clearances. As I said I measured the caged bearing bores..then subtracted the clearances...which yielded to sizes to grind the journals to.

I guess you are thinking they are tight. I am using coated bearings. If you ignore the coating my oil clearances are 4 tens larger than the #'s I listed. Think of my clearances as being 20 tens for the bearing with the thrust flanges and 16 tens for the rest.

Quote:
Originally Posted by cdigerlando View Post
Are these the oil clearances you are specifying or are they the clearances you measured, and you are shooting for more clearance?
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  #29  
Old 10-26-2007, 12:14 PM
cdigerlando cdigerlando is offline
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Quote:
Originally Posted by longassname View Post
those are the journal sizes I am specifying to obtain those clearances. As I said I measured the caged bearing bores..then subtracted the clearances...which yielded to sizes to grind the journals to.

I guess you are thinking they are tight. I am using coated bearings. If you ignore the coating my oil clearances are 4 tens larger than the #'s I listed. Think of my clearances as being 20 tens for the bearing with the thrust flanges and 16 tens for the rest.
I'm also going to be using a coated bearing, so I was just curious what you did about clearance. I was going to shoot for about .0018 with the coating, which is a bit more clearance than you are using.
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  #30  
Old 11-04-2007, 11:13 AM
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That's a lot more clearance than I'm going with. According to the Subaru specs that's way past the wear limits but with the tri-metal bearings you are using you definitely need to error on the loose side. I wouldn't go that loose obviously but then I wouldn't use the bearings you are using either. You'll just have to figure it out.



Quote:
Originally Posted by cdigerlando View Post
I'm also going to be using a coated bearing, so I was just curious what you did about clearance. I was going to shoot for about .0018 with the coating, which is a bit more clearance than you are using.
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