Allis Chalmers 226 Engine Headers

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   I would like to get some opinions on this header set up for an Allis 226 engine (https://www.keystoneturbo.com/product-page/allis-chalmers-wd-ramhead-header). It looks good and sounds good, but Keystone has not done any dyno testing for horsepower or torque. They are estimating 20% to 25% HP gain, I'm not sure if headers alone would gain that much. This should be a video of it set up and running on a WD https://www.facebook.com/100072292363147/videos/pcb.750550677364671/1534044748001184

Edited by SLM(IL) - 1 hour 20 minutes ago at 7:58pm

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SLM(IL) Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 08 Sep 2014 Location: United States Points: 16	Post Options Post Reply Quote SLM(IL) Report Post Thanks(0) Quote Reply Topic: Allis Chalmers 226 Engine Headers Posted: 3 hours 37 minutes ago at 5:41pm
	I would like to get some opinions on this header set up for an Allis 226 engine (https://www.keystoneturbo.com/product-page/allis-chalmers-wd-ramhead-header). It looks good and sounds good, but Keystone has not done any dyno testing for horsepower or torque. They are estimating 20% to 25% HP gain, I'm not sure if headers alone would gain that much. This should be a video of it set up and running on a WD https://www.facebook.com/100072292363147/videos/pcb.750550677364671/1534044748001184 Edited by SLM(IL) - 1 hour 20 minutes ago at 7:58pm

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DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21980	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 2 hours 35 minutes ago at 6:43pm
	I had no idea the Keystone Klowns were still peddling their "go faster" tractor parts so that you could be another victim. First of all, an "equal length" exhaust manifold (or header as you call it) is for automotive engines that run waaay faster than 2000 RPM. So,right off the bat, what is the purpose here ?? They claim a 20 HP gain ?? Over what ?? A 35 HP WD engine?? maybe, but not a 55 HP D-17 engine. It's really strange they offer no real proof to back up their wild claim. If you notice, the carburetor on that particular engine is a D-19 sized unit. That carb size is good for 5 to 8 HP on a dyno at 2,000 RPM with a stock manifold and no more than that. If you use your STOCK carb, you will gain NOTHING !! So, what are you trying to accomplish ??? If you are an antique tractor puller, all the clubs I associate with wouldn't allow that manifold because it ain't stock/factory replacement. For $1450 dollars I'd rather install an 8 to 1 compression 4 1/8" motor kit and then you'd have something. Exactly what is the tractor model/engine model?? and what is your goal here ?? Do a real internet search on Keystone turbocharger kits and some of the blown up engines that were the result. This is all my OPINION.

SLM(IL) Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 08 Sep 2014 Location: United States Points: 16	Post Options Post Reply Quote SLM(IL) Report Post Thanks(0) Quote Reply Posted: 28 minutes ago at 8:50pm
	Thank you for your reply Doctor, I was hoping to get your opinion. I did make a mistake in my original post. They are claiming 20% to 25% HP improvement, not 20 HP as I had written. On a D17 I think this would be a 10 -15 HP gain over stock. I have a hard time believing this with out any testing to prove it, however I wanted to get some other opinions.

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21980	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 27 minutes ago at 8:51pm
	What is your goal?? or reason for even considering this thing ??

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21980	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 23 minutes ago at 8:55pm
	20% of 55 pto HP is 11 HP. And you MUST use the D-19 carb to achieve that. And that is their guess. I said I can get 5 to 8 HP using your manifold ( throat altered) with a D-19 carb and I have dyno tested. Again, what are you wanting to accomplish ?? and what tractor model/engine model ?? Edited by DrAllis - 22 minutes ago at 8:56pm