Build a 180 for pulling
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Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=148462
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Topic: Build a 180 for pulling
Posted By: waterboy
Subject: Build a 180 for pulling
Date Posted: 13 Mar 2018 at 8:12pm
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Starting to build a 180 for pulling. What can you do to gear it up and can you put a scs box in to replace the power director. Going to run 20.8 - 38 on it and need to be around a 22 mph road gear at 3000 rpm. Thanks
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Replies:
Posted By: DrAllis
Date Posted: 14 Mar 2018 at 7:13am
| I don't have my speed chart with me at work, but regular road gear can't be too far from that speed. You sound very confident that you have enough engine and clutch to be able to run that cog. What weight ?? 5000?....6000?.....7000?? |
Posted By: waterboy
Date Posted: 14 Mar 2018 at 12:51pm
| 6500# and 7000# for the class weight and for the power plant will be a 380 cubic inch, P pump with a 2.33 charger. |
Posted By: DougG
Date Posted: 14 Mar 2018 at 1:30pm
| Oh dang it Prolly can be done,,, putting a Crower clutch in it? |
Posted By: tbran
Date Posted: 14 Mar 2018 at 3:40pm
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You are almost right on with straight drive - spline coupler - eliminate the PD clutch; we ran a set up like that in the 70's - Harrison double clutch, P pump AND Twin chargers.... along with the melted pistons, bent rods, etc... before we made the parts stand up - and it became evident that the dollar$ nece$$ary to compete with nearly 500CI power plants exceeded our budget... of course there were not many 'rules' back then... ------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: DougG
Date Posted: 14 Mar 2018 at 5:47pm
| Just seen the 3000 rpm limit, yikes! 301,s run great at 4500 rpm |
Posted By: tbran
Date Posted: 14 Mar 2018 at 9:50pm
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Hmmmm, oh, well would not spend any on increased gearing just yet... ------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: DrAllis
Date Posted: 15 Mar 2018 at 7:10am
| 7th gear will be 22.3 MPH @ 3000 RPM. 8th gear will be 27.8 @ 3000 RPM both with 20.8 rear tires at 72.4 inch diameter. |
Posted By: KevinON
Date Posted: 15 Mar 2018 at 11:11am
| Doesn't MACK build the mechanical two speed set up? |
Posted By: tbran
Date Posted: 15 Mar 2018 at 12:12pm
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so what would be the best guess minimum hp needed to turn them 27mph ... we had twin chargers /intercooler and couldn't turn 20.8s on some tracks after the PD was removed in 8th..... at 7000# like I said - that's when we quit... ------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: injpumpEd
Date Posted: 15 Mar 2018 at 12:33pm
Mack had built some overdrive gear boxes that went where the power directer was, to be able to speed up the input of the trans. Basically like a pro-fab gear box, I think it even used their gears. You select the gear, no shift on the go. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
KevinON wrote:Posted By: Acllss puller
Date Posted: 15 Mar 2018 at 9:08pm
| Sorry the 301 isn't going to run 22 mph with a 2.33 at 3000 rpm even at 380 cubes ! Not unless you pull a super lite sled . 600 hp at best with best if best parts , . I ran an h1e holset (2.37) at 4200 rpm and couldn't run that big and I had an intercooler too ! At 5700-6700-7700 lbs . |
Posted By: DrAllis
Date Posted: 16 Mar 2018 at 5:34am
| I'd think about trying an 18.4 X 34 tire to begin with and get the tractor to run 7th gear that way. You'll not want a lot of lug height on the tires and I also realize there can be quite a difference in track dirt, but generally modern sleds let you run fast and less bar is desired at the end to keep the engine alive. |
Posted By: waterboy
Date Posted: 16 Mar 2018 at 7:31am
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Class tire size is 18.4 x 38. Planning on running a 5.9 cummins built to 380 cube. I know it can be done there is one running in this class already. Some tell me that you need d17 differential if so off of what series.
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Posted By: DrAllis
Date Posted: 16 Mar 2018 at 3:59pm
| A couple days ago, you were going to run 20.8 X 38's and now you are at 18.4 X 38...??? Running an 18.4 X 34 shouldn't be an issue because it is smaller than the maximum size allowed. The only D-17 differential part that I'd use would be the side gear thrust washers. You still need to needle the spider gear pin. So, the one guy running a 380 Cummins is the leader of the pack right now ?? And it's in a 180/185 chassis ?? I've heard of an AC running a Cummins and I also hear it runs down the track and pukes most of the time....never really spins it out ?? Is this that one ?? |
Posted By: waterboy
Date Posted: 24 Mar 2018 at 10:33am
| Sorry for the confusion on tire size I had not look at the rules my self just going off of what i was told. The reason why I have was wanting to run that mph is the current point champ for 3 years runs that fast down the track on 18.4 - 38. The class rule is 380 cu 2.33 inlet with a .25 MAP groove and no suspended slug charger rules at 3000 rpm 6500 lbs. |
Posted By: waterboy
Date Posted: 24 Mar 2018 at 10:39am
| Can you bolt the power director and still be able to use high and low. Does not need to be able to shift on the go just shift able to run 7th or 8th gear. |
Posted By: DrAllis
Date Posted: 24 Mar 2018 at 10:46am
| I can build you a Power Director eliminator that still gives you 7th and 8th, just not on-the-go. What's your foot clutch going to be ?? |
Posted By: waterboy
Date Posted: 24 Mar 2018 at 10:57am
| Planning on getting the clutch from Kenny's. |
Posted By: rowcropmafia
Date Posted: 06 Apr 2018 at 4:38pm
| Are you from Illinois? Sounds just like the rules you run here. I'm assuming the tractor Dr. Allis says runs down the track and pukes is mine. While 8th gear can be a little tough to handle at times depending on conditions I have plenty of videos of me burning it in at the end of the track as well. It can be tough balance the fine line of making power and keeping a charger lit with that little motor, few rpm and hot air. Gear ratio is very important |