G160 for CA
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=128725
Printed Date: 30 Oct 2025 at 10:34pm
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Topic: G160 for CA
Posted By: 1955allisca
Subject: G160 for CA
Date Posted: 13 Sep 2016 at 9:18pm
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I just got a g160 engine. Is there anything you can do to these engines for more power? Piston/sleeve kit or possibly flattop higher compression pistons?
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Replies:
Posted By: dgerth
Date Posted: 13 Sep 2016 at 10:23pm
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I am no guru on AC stuff but I upped the cr to 12.7:1 by changing the pistons and milling them down a mite. Made a 4 -6 mph "giant killer" out of it. We are quite happy with the way it pulls and have the proof hanging on the shop walls. You won't be sorry!! dan
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Posted By: 1955allisca
Date Posted: 14 Sep 2016 at 6:05am
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What kind of pistons did you use? I have a g149 in it right now and it has loads of power I just like overkill I reckon
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Posted By: PaulB
Date Posted: 14 Sep 2016 at 8:16am
After you get it going, travel over my way to pull with us, we need some more 2500 pound tractors. What Dan has done is about all you can do without going the turbocharger route, for that 160 just the way it is works great.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Posted By: DrAllis
Date Posted: 14 Sep 2016 at 10:05am
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Quick easy HP ?? Use 93 octane gas and advance the timing to 30 degrees BTDC at wide-open throttle. Remove the carb and install the larger 175 venture or swap out for the larger D-19 style carb. Hog out the intake throat above the carb if needed. These two things(D-19 carb and fuel/timing) could add 6 to maybe 10 HP without ever tearing the engine apart.
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Posted By: 1955allisca
Date Posted: 14 Sep 2016 at 10:31am
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Will flattop pistons clear?
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Posted By: DrAllis
Date Posted: 14 Sep 2016 at 11:16am
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Sure, if they're not too tall. As long as they aren't any taller than the outer edge of the Power Crater OEM pistons they'd be fine.
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Posted By: 1955allisca
Date Posted: 15 Sep 2016 at 8:36pm
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Does anyone know the measurement from top of wrist pin hole to top of piston on stock g160 piston I think I found some pistons that will work
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Posted By: DrAllis
Date Posted: 15 Sep 2016 at 10:15pm
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G-160 piston pin is one inch diameter, not .990" like G-149.
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Posted By: 1955allisca
Date Posted: 15 Sep 2016 at 10:41pm
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Do you know measurement from top of wrist pin hole to top of piston? I am trying to figure out if these flattop pistons I found will come up as far as the power craters
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