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post #1 of 5 (permalink) Old 03-19-11, 07:51 PM Thread Starter
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Max Bore

Hay I just joined the forum.
My question is what can the max bore be on the 105 FT block D2TE casting.

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post #2 of 5 (permalink) Old 03-19-11, 08:54 PM
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Re: Max Bore

Welcome to FF, I'm sure someone will be along shortly that can answer that question.

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post #3 of 5 (permalink) Old 03-20-11, 02:16 PM
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Re: Max Bore

The block you have is more than likely a good block with potential. Usually the 105's have the extra webbing in the block. You could probably go 100 thousandths over bore and still be safe. If you can get it sonic tested, then you'll know for sure.

There was an article in a ford magazine, someone had taken a 352 @ 4.00 bore and bored the chambers to a 428 @ 4.13. That's an hundred and thirty thousandths over.

Your block is either a 360 or 390 which is at 4.05 bore. (the difference is the crank stroke).

So depending on what your looking for.....
Here is the formula for caulculating what engine size you want.

bore X bore X stroke X .07854 X 8 (#of cyl.)

example: 4.05 X 4.05 X 3.78 X .07854 X 8 = 389.5 (390cid)
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post #4 of 5 (permalink) Old 03-20-11, 05:05 PM Thread Starter
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Re: Max Bore

kdtrucker, thanks for your post. This block is a 390 .030 over. It's set for a long while befor I picked it up. #3 cyl. has had water damage and slight piting. Befor I put alot of money in this block I will have a shop look at it. I am just looking at the worst it could be bore wise.
By the way where did you get the formula you used for CID. Iv'e was taught this way with pie. bore X stroke X pie (3.1416) X 8 =
4.05 X 3.78 X 3.14 X 8 = 384.56.
Your way comes closer.
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post #5 of 5 (permalink) Old 03-22-11, 10:40 AM
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Re: Max Bore

I had a 390 with a bad cylinder, I had it bored 190 thousandths over and then sleeved. It's just fine. You can ask your machinest to hone it 5 thousandths or 10 thousandths and hope that it clears up.

I've known some of these formuals for a long time. There are many websites that will give you these formulas. Here is one you can check out.

Engine Formulas
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