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41
UTV Member Project Logs / Re: AR-51 build
« Last post by fabr on January 07, 2019, 07:28:57 AM »
Not all steel is heat treatable. Do you know what it is made from?  Not all steels HT the same way either. The 8620 I referred to will not through harden leaving a hardened surface and a ductile core. The 4340 is through hardenable. Either will work well (and some others)but the composition needs known for the treater to be able to properly HT the item.
42
UTV Member Project Logs / Re: AR-51 build
« Last post by deranged on January 07, 2019, 07:14:46 AM »
Cryo does not replace heat treating. It is an additional step . In your case (and 99% of all cases) HT is all that is needed. Best shaft material would be 8620 but 4340 is just fine also.
Good point.

Could I heat treat the existing spool I already have?  It seems it's still good.

Justin
43
UTV Member Project Logs / Re: AR-51 build
« Last post by fabr on January 07, 2019, 06:00:59 AM »
Cryo does not replace heat treating. It is an additional step . In your case (and 99% of all cases) HT is all that is needed. Best shaft material would be 8620 but 4340 is just fine also.
44
UTV Member Project Logs / Re: AR-51 build
« Last post by deranged on January 07, 2019, 05:39:05 AM »
I used a similar rear spool design with the G&G spline shaft.  I twisted the first shaft and had to upgrade to a heat treated one.  Running a zx12.  Id check to see if HT was done, Rick doesnt say on his site.  Small price for the added durability. 

Upgrade looks great, looking like 10-12" added to length??
The wheelbase is 12" longer.  Good eye.  It will also be 6" overall wider too.
I will look into what Rick uses for shaft material.  Would it be better to cryo treat it vs heat treat?  I may have to look into that.
What does your car weigh?  I think I will be near 1200# with me in it after i'm done.

Justin
45
UTV Member Project Logs / Re: AR-51 build
« Last post by Carlriddle on January 07, 2019, 05:19:15 AM »
I used a similar rear spool design with the G&G spline shaft.  I twisted the first shaft and had to upgrade to a heat treated one.  Running a zx12.  Id check to see if HT was done, Rick doesnt say on his site.  Small price for the added durability. 

Upgrade looks great, looking like 10-12" added to length??
46
UTV Member Project Logs / Re: AR-51 build
« Last post by deranged on January 07, 2019, 04:54:13 AM »
Well after my bottom lip stopped shaking and I wiped my tears away(insert image of a 4 yr old that lost a toy), I got some stuff done.

I re drew my inner bulkhead section, re drew my inner capture plates, drew my rear uprights and also cut said parts.  I ended up with an 8" vertical spread between my arms.  My upright clears the inside of my wheels and we are back on track!

Yesterday I got it all tacked up as well as actually attached to the chassis!  Next up is to build the new mid rail section for the back.  This will take me cutting more of the original chassis.  Where the "B" pillar attaches to the mid rail is where that will get cut and a new section that is longer and wider will meet the new vertical tubes on the bulkhead.

 

If you close one eye and squint really hard, you can kinda see how much longer the new chassis section is compared to the original. You can also see the clamped on piece of new 1.5" square as that is how far that new section will be coming back.


Justin
47
UTV Motor and Drivetrain / Re: wheel size?
« Last post by Carlriddle on January 05, 2019, 05:15:49 AM »
Thanks guys. I may go ahead and mount these on my wheels just to see.
48
Something to talk about / The 2019 Dakar Rally Explained
« Last post by FeedBot on January 04, 2019, 11:17:00 PM »
The 2019 Dakar Rally Explained

The Dakar Rally’s uniquely challenging combo of impossible terrain and ridiculous logistics make it pretty much the meanest motor vehicle race on Earth. The 2019 Dakar Rally is coming right up on Jan. 6. Here’s everything you need to know.

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Source: The 2019 Dakar Rally Explained

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49
UTV Motor and Drivetrain / Re: wheel size?
« Last post by dsrace on January 04, 2019, 01:31:54 PM »
mine are on 12" wide as well....oh wait mine are 1450's now hmmm still vote 12" side lol



jersdunz nice of you to drop in again lol


well carl we sort of chased jersdunz around st a so you know how well his hook up  ;D ;)
50
UTV Motor and Drivetrain / Re: wheel size?
« Last post by fabr on January 04, 2019, 12:01:38 PM »
Mine are on 12's and slightly flatter than that. Depends on air pressure also.
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