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W / G226 Mods

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frnkeore View Drop Down
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    Posted: 20 Jun 2019 at 1:59pm
It looks like I've got the basic G226 dimensions fairly close so, I thought I'd do some things with the figures that might be interesting.

Since this is the pulling part of the forum, everything will deal with the 4.125 bore. If you deal with the 4.00" bore, the figures will be 14 CI less and about .2 less compression. I don't know if the 4.125 piston/sleeve kits use the std stock, 4.000" bore, 2.530 CH but, I will assume that for all my data. All data, is based on a deck height of 12.656 and a rod length of 7.500.

First up, for those that want custom pistons made, the compression height of the piston, for different compression ratio's.

4.125" Bore
2.590 = 8.01
2.630 = 8.52
2.670 = 9.06
2.700 = 9.51
2.730 = 10.02

So, each increase in CH, of ~.035, will give you a 1/2 point of compression.

Next up, is the stock CH of 2.530 and a welded, offset ground crankshaft to a stroke of 4.750.


You can also increase the stroke to 4.800 and get 257 CI and a CR of 9.75 with the same CH of 2.530.

I hope this helps someone in their engine build.

Frank
1959 D17 Series I #24001+
'55 & '59 Ford 850 & 861
Ferguson TO 35 Deluxe, Oliver 70
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mjbower View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mjbower Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jun 2019 at 9:01am
That's good information thanks for doing the math answers a lot of questions.
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frnkeore View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote frnkeore Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jun 2019 at 11:01am
Your welcome, I'm happy to help.
Frank
1959 D17 Series I #24001+
'55 & '59 Ford 850 & 861
Ferguson TO 35 Deluxe, Oliver 70
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Carl(NWWI) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Carl(NWWI) Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jul 2019 at 11:10pm
So what would the compression ratio be for the 4.125 flat top pistons?

Edited by Carl(NWWI) - 11 Jul 2019 at 11:11pm
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frnkeore View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote frnkeore Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jul 2019 at 1:10am
11.016
Frank
1959 D17 Series I #24001+
'55 & '59 Ford 850 & 861
Ferguson TO 35 Deluxe, Oliver 70
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d17brown View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d17brown Quote  Post ReplyReply Direct Link To This Post Posted: 14 hours 1 minutes ago at 7:11pm
whats compression ratio, for 4.6 bore, 6 inch stroke
phil
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frnkeore View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote frnkeore Quote  Post ReplyReply Direct Link To This Post Posted: 13 hours 38 minutes ago at 7:34pm
Way to much Confused
If you use the standard compression height of 2.53 and standard 7.5 rods, the piston will stick out of the block, 3/8".

If you can give me the C/H of the pistons and rod length you use, I can give you a answer for flat top pistons, if cupped, I need the cup volume, too.

Frank
1959 D17 Series I #24001+
'55 & '59 Ford 850 & 861
Ferguson TO 35 Deluxe, Oliver 70
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