W / G226 Mods
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Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=162073
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Topic: W / G226 Mods
Posted By: frnkeore
Subject: W / G226 Mods
Date Posted: 20 Jun 2019 at 1:59pm
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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+, '59 D14 '55 & '59 Ford 850 & 861 Ferguson TO 35 Deluxe, Oliver 70 and 5 more. |
Replies:
Posted By: mjbower
Date Posted: 23 Jun 2019 at 9:01am
| That's good information thanks for doing the math answers a lot of questions. |
Posted By: frnkeore
Date Posted: 23 Jun 2019 at 11:01am
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Your welcome, I'm happy to help. ------------- Frank 1959 D17 Series I #24001+, '59 D14 '55 & '59 Ford 850 & 861 Ferguson TO 35 Deluxe, Oliver 70 and 5 more. |
Posted By: Carl(NWWI)
Date Posted: 11 Jul 2019 at 11:10pm
| So what would the compression ratio be for the 4.125 flat top pistons? |
Posted By: frnkeore
Date Posted: 12 Jul 2019 at 1:10am
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11.016 ------------- Frank 1959 D17 Series I #24001+, '59 D14 '55 & '59 Ford 850 & 861 Ferguson TO 35 Deluxe, Oliver 70 and 5 more. |
Posted By: d17brown
Date Posted: 17 Jul 2019 at 7:11pm
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whats compression ratio, for 4.6 bore, 6 inch stroke ------------- phil |
Posted By: frnkeore
Date Posted: 17 Jul 2019 at 7:34pm
Way to much  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+, '59 D14 '55 & '59 Ford 850 & 861 Ferguson TO 35 Deluxe, Oliver 70 and 5 more. |
Posted By: d17brown
Date Posted: 18 Jul 2019 at 12:48pm
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Farmall h rods. Flat top pistons ------------- phil |
Posted By: frnkeore
Date Posted: 19 Jul 2019 at 12:12am
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Do you or anyone else, have the center to center length of the Farmall H rods? ------------- Frank 1959 D17 Series I #24001+, '59 D14 '55 & '59 Ford 850 & 861 Ferguson TO 35 Deluxe, Oliver 70 and 5 more. |
Posted By: frnkeore
Date Posted: 19 Jul 2019 at 12:41pm
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I found a TRW listing for the H rods. They are appox 7.27 C/C. I will still need the compression height of your pistons, to do the calculation. The C/H is the distance from the top of the piston, to the center of the wrist pin or if you can give me the distance from the edge of the wrist pin bore, to the top and the diameter of the wrist pin, I can get the C/H. BTW, that is quite a bit of rod angle, 24.37 deg. ------------- Frank 1959 D17 Series I #24001+, '59 D14 '55 & '59 Ford 850 & 861 Ferguson TO 35 Deluxe, Oliver 70 and 5 more. |
Posted By: d17brown
Date Posted: 19 Jul 2019 at 8:28pm
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i think it is 2.25 ------------- phil |
Posted By: frnkeore
Date Posted: 20 Jul 2019 at 1:48am
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I don't think the C/H can be 2.25. That gives a CR of 29.78. To high
for alcohol and I don't think diesel would even hold together at that
CR. I changed the C/H to 1.86 and that gives 11.03. With the short cam timing of these engines, I think it would take Av gas to work with that CR.   ------------- Frank 1959 D17 Series I #24001+, '59 D14 '55 & '59 Ford 850 & 861 Ferguson TO 35 Deluxe, Oliver 70 and 5 more. |
Posted By: danno067
Date Posted: 29 Jul 2019 at 7:54pm
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frnkeore, I'm a little late but i have one that was dumped in my lap that someone else started. Could you run the math on this. Stroke 5.750 Bore 4.560 Piston to Deck height .642 Rod length pin to pin 8" Piston comp height 1.1605 Thanks much. |
Posted By: frnkeore
Date Posted: 31 Jul 2019 at 12:51pm
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I take it that this isn't a G226 block? the deck height comes out different and I don't think you can get a 5.75 bore in a G226. You didn't give a head gasket thickness so, I used a custom .040 copper one.  ------------- Frank 1959 D17 Series I #24001+, '59 D14 '55 & '59 Ford 850 & 861 Ferguson TO 35 Deluxe, Oliver 70 and 5 more. |