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Overhaul kit for AC 170 gas?
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Tracy Martin TN View Drop Down
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10694 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tracy Martin TN Quote  Post ReplyReply Direct Link To This Post Topic: Overhaul kit for AC 170 gas?
    Posted: 04 Sep 2022 at 9:34pm
Who makes and or sells the best overhaul kit 8:1 compression for AC 170 gas? Thanks, Tracy
No greater gift than healthy grandkids!
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Alex09(WI) View Drop Down
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Joined: 15 Mar 2012
Location: CECIL WI
Points: 1725 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Alex09(WI) Quote  Post ReplyReply Direct Link To This Post Posted: 05 Sep 2022 at 1:10pm
Only place you can get a stock 4" bore is with original Allis parts.
That being said, my shop offers several different piston/sleeve kits for the 226 'big block' gas engines:
A. Aftermarket 4 1/8" bore 7.25:1 ratio
B. Aftermarket 4 1/8" bore 8.25:1 ratio
C. OEM D17 kit, 4" bore, 7.25:1 ratio
D. OEM 175 kit 4" bore, 8.25:1 ratio

You may have to get a 8.25:1 kit and have 1/16"? machined off the top lip of the piston to get to the 8:1 range. 
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Tracy Martin TN View Drop Down
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10694 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tracy Martin TN Quote  Post ReplyReply Direct Link To This Post Posted: 05 Sep 2022 at 7:01pm
Alex, Thanks, PM sent. Tracy

Edited by Tracy Martin TN - 05 Sep 2022 at 7:07pm
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Allis dave View Drop Down
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Joined: 10 May 2012
Location: Northern IN
Points: 2971 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Allis dave Quote  Post ReplyReply Direct Link To This Post Posted: 06 Sep 2022 at 8:05am
Check out this topic from a couple months ago.
I don't think there would be any issues using a 8.25:1 175 kit in a 170



Edited by Allis dave - 06 Sep 2022 at 8:08am
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