Pulling Forum - Torque ?

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Torque ?

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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=168696
Printed Date: 23 Nov 2024 at 11:59am
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Topic: Torque ?

Posted By: bradley6874
Subject: Torque ?
Date Posted: 28 Feb 2020 at 3:56pm

Ok 3.5 mph 15.5 cut 4000 lbs same tractor one has a 400 cubic inch (226) 4 cyl the other has a 400 cubic inch( 301) 6 cyl. Figure same cam grind and same compression ratio 2400 rpm on both.

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You can wash the dirt off the body but you can’t wash the farmer out of the heart and soul

Replies:

Posted By: DrAllis
Date Posted: 28 Feb 2020 at 5:53pm

Which one has a bigger carburetor ??? Which one has the cam timing advanced more than the other ??

Posted By: SteveM C/IL
Date Posted: 28 Feb 2020 at 8:18pm

yeah,it ain't that simple

Posted By: AaronSEIA
Date Posted: 29 Feb 2020 at 7:02am

Which one has tires biting better? I thought some of the point of speed limit classes was to take the engine out of the equation?

AaronSEIA

Posted By: bradley6874
Date Posted: 29 Feb 2020 at 9:12am

Ok guess its still to broad. Take a 180. For BOTH same tractor for both if i use 301 call it a 180 if i use 226 call it 175 cams ground to same spec set same timing same carburator on both my question is th torq curve on both. As lugging down

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You can wash the dirt off the body but you can’t wash the farmer out of the heart and soul

Posted By: blue924.9
Date Posted: 29 Feb 2020 at 11:30am

What's bore and stroke on each one?

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hi my names dan, I am a young guy. i have a problem, i prefer my tractors orange and my clutches mechanical, thanks for letting me share

Posted By: bradley6874
Date Posted: 29 Feb 2020 at 4:10pm

226. Bore 4.6 stroke 6.25. 301 4.25 bor stroke 4.75

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You can wash the dirt off the body but you can’t wash the farmer out of the heart and soul

Posted By: DrAllis
Date Posted: 29 Feb 2020 at 4:55pm

Generally, it's thought that a 4 cylinder lugs better than a 6 cylinder. In this case I don't know or really care. Even if you have identical everything (carb, ignition timing, compression ((which you didn't mention)), cam grind, cam timing, same exact fuel, same spark plug heat range, same ignition coil, same piston head design, etc, etc, etc...…. You fail to address the fact that one cylinder head may flow air better than the other one !!!! I prefer to have my engine torque/power and gear ratios such that I don't expect to ever lug one down to a stall or near stall.