 Fred's 2374 -> 2258 Engine Build Thread |
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| friethmiller |
 Jun 27 2026, 08:59 PM
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#21
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Senior Member  Group: Members Posts: 1,336 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region 
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QUOTE(Montreal914 @ Jun 27 2026, 08:49 PM)  All this to say that your LN lifters may be WebCam ones. Right! I will find out. Here are the cards from both cams. 104 lc on both.   FYI, my intake/exhaust valves are 44/38 and my exhaust is a full 1 5/8” tangerine header + muffler. |
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| friethmiller |
Jun 28 2026, 04:47 PM
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#22
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Senior Member Group: Members Posts: 1,336 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region
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Trying to verify dimensions here. What is the standard case bore for the type 4 engine? AI says 2.559”. That seems too small. I’m measuring roughly 2.768 for the rear main on a case with a .02 line bore. Why am I off a decimal place? (IMG:style_emoticons/default/idea.gif)
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| 930cabman |
Jun 28 2026, 05:48 PM
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#23
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Advanced Member Group: Members Posts: 4,728 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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QUOTE(friethmiller @ Jun 28 2026, 04:47 PM) Trying to verify dimensions here. What is the standard case bore for the type 4 engine? AI says 2.559”. That seems too small. I’m measuring roughly 2.768 for the rear main on a case with a .02 line bore. Why am I off a decimal place? (IMG:style_emoticons/default/idea.gif) I had my local machinist make up a "case gage", it's a couple thou over to allow for some clearance. I can check tomorrow and report back |
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| cgnj |
Jun 28 2026, 06:06 PM
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#24
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Senior Member Group: Members Posts: 733 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None
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@friethmiller AI is not your friend. That is for a type 1 motor.
Type4 Saddle bore is 70mm or 2.756. 2.768 is correct  |
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| friethmiller |
Jun 28 2026, 07:15 PM
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#25
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Senior Member Group: Members Posts: 1,336 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region
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QUOTE(cgnj @ Jun 28 2026, 07:06 PM) @friethmiller AI is not your friend. That is for a type 1 motor. Type4 Saddle bore is 70mm or 2.756. 2.768 is correct Excellent! Thank you. (IMG:style_emoticons/default/beerchug.gif) |
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2 Members: bzettner, friethmiller
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