Pulling Forum - 301 gasser

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301 gasser

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=153744
Printed Date: 23 Nov 2024 at 5:58pm
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Topic: 301 gasser

Posted By: allis3
Subject: 301 gasser
Date Posted: 06 Sep 2018 at 8:52pm

How big has anyone built a 301 gas for pulling

Replies:

Posted By: DrAllis
Date Posted: 07 Sep 2018 at 7:22am

442. Next question.

Posted By: allis3
Date Posted: 07 Sep 2018 at 8:58am

That’s descent but we’re gonna be competing 8-10 mph with RDs and big cube Oliver’s and Deere’s. Hoping to get up close to 600

Posted By: DrAllis
Date Posted: 07 Sep 2018 at 10:16am

Not gonna happen with a 2000 series AC.

Posted By: allis3
Date Posted: 07 Sep 2018 at 11:05am

Not enough room to swing ,

Posted By: DrAllis
Date Posted: 07 Sep 2018 at 1:38pm

442 is 4 1/2" bore X 4 5/8" stroke and I had to grind notches in the camshaft to clear the rods when they swing by. Same bore with a 6 inch stroke is 572 cubes and I see no way to accomplish that much swing even with custom made conn rods, but maybe if there's enough $$$$$$ applied to the job ??

Posted By: allis3
Date Posted: 07 Sep 2018 at 2:35pm

I haven’t been in the 301s , built quite a few 226s. Biggest being a little over 400 cubes . I guess I’ll take one apart and see what happens thanks for your response

Posted By: d17brown
Date Posted: 09 Sep 2018 at 7:55pm

had a 226 to 435cubes

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phil

Posted By: allis3
Date Posted: 10 Sep 2018 at 8:06am

Yes I’ve built some around that big , but not the 6 cylinder, I’ll just have to get inside and see

Posted By: AaronSEIA
Date Posted: 10 Sep 2018 at 4:37pm

How do you get a 226 to 435?

AaronSEIA

Posted By: d17brown
Date Posted: 10 Sep 2018 at 7:53pm

4.706 bore, 6.25 stroke. Ran in a D17,

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phil

Posted By: AaronSEIA
Date Posted: 10 Sep 2018 at 8:34pm

How thin was the webbing between the cylinders? I don't recall there being that much extra room. It is impressive what you guys can do to make cubes.
AaronSEIA

Posted By: allis3
Date Posted: 11 Sep 2018 at 6:53am

My sleeves were touching,I believe they were .120 thick

Posted By: Larry W.
Date Posted: 20 Feb 2019 at 12:42pm

530 ci

Posted By: bsallis180
Date Posted: 20 Feb 2019 at 12:57pm

Wow Larry that’s impressive what was your bore and stroke? That is amazing

Posted By: d17brown
Date Posted: 21 Feb 2019 at 2:37pm

i have a 301 gas motor for sale complete

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phil

Posted By: DrAllis
Date Posted: 23 Feb 2019 at 9:52pm

4.500" on the bore and 5.550" on the stroke gets you 530 cubes.

Posted By: bsallis180
Date Posted: 24 Feb 2019 at 6:03pm

So doc how big can you go on a NA gas till the flow of the head won’t flow enough to fill the bore?

Posted By: DrAllis
Date Posted: 25 Feb 2019 at 7:10am

Don't have any idea. I don't have access to a flow-bench. The carburetor (to a degree) controls how many gallons of air per minute the engine can breathe. I have found using the same stock carb, cylinder head and camshaft and going from 310 to 360 to 390 cubes over the years, in open RPM classes, the more cubes, the less RPM the engine can run, but the torque down low keeps increasing. Turbocharged diesel engine HP also is limited by the size and efficiency of the turbo compressor inlet size. More air in means more potential HP. More cubes, with the same turbo air inlet size, keeps bringing down the top RPM's and adding to the low end torque.

Posted By: bsallis180
Date Posted: 25 Feb 2019 at 1:47pm

Regardless the toque will still rise as long as the holes fill up. What for carburetor anything larger then 1-7/8?