U4 4900 RZR build

Collapse
X
Collapse
First Prev Next Last
 
  • Filter
  • Time
  • Show
Clear All
new posts

    U4 4900 RZR build

    I haven’t missed many U4 races since 2012. Decided if I was going to be there anyway I might as well be racing my own car. Having watched tons of hours of SXS’s racing, where as many as 25 rigs take the green flag, and in 15 minutes be down to 4 or 5 cars left running. My dumb idea was this, “I don’t need to outrun these fools, I just need to be able to outlast them” and started formulating a plan.

    Since racing is a piss poor investment to begin with I specifically wanted a wrecked machine to start with not a new one. Why??? Because to make a race car out of a golf cart is to throw away half the machine so I wouldn’t mind if half the shit I’d be setting aside was gone already if it saved me the money I was going to spend on upgrades. I know people that DNF every race with between 60 and 70 thousand dollars in their race carts, and I have nowhere near that kind of money to blow on this stupid venture.


    I have some friends that have a business buying, fixing, selling salvage auction vehicles. So I put out a request for a low miles/hours stock turbo 2 seat rzr believing that Polaris has the best aftermarket support. It didn’t take long for “friend” to come up with what sounded like the perfect wreck for my needs. Supposedly stock, 689 miles 45 hours showing on it. After shopping around hard for a couple years I still haven’t found a better deal than this one. It all started with this one picture


    #2
    Upon receiving it it turns out the damage to it was far worse than described. (Who knew salvage sellers would lie about the damage to inflate a wrecks worth) I got it the day before leaving for KOH this year and didn’t have time to look at it other than to asses what was wrong with it. It had been front flipped in a sand dune somewhere, the kind of front flip where someone cased a jump onto the nose, bounced onto its ass without touching the cage to ground. It had pro armor aftermarket harnesses and I’m pretty sure whoever wrecked probably got injured because the improperly assembled belts wouldn’t hold anyone in the seats. More on that later. I knew before I bought it that the front a-arms were broken, happens all the time because they are weak garbage. In the initial sand stuffing the grill got shoved inside the facia and poked a bunch of holes in the radiator ruining it. Had tons of plastics damage but the main chassis is straight-ish as far as I can tell. Also noticed there was a lot of aftermarket stuff on it for a “stock” machine.

    Comment


      #3

      Comment


        #4
        After assessing the damage I decided I’d better make it a roller and do some test driving because if it needed a new engine right off the bat I’d run out of money. Another couple of friends helped me out with this part. One, loaned me stock a-arms axles and steering stuff. Another gave me a radiator saving me around $600 bucks. Even though it was missing some pieces I got it driving and got to put about 30 trail miles on it learning that I’d lucked out and it was in plenty good enough shape to continue. At this point in the story is where I realized it was full of race gas, without getting it tested it’s hard to say octane but it was delivered with a full tank of purple 106 to 110 octane. WTF but more on that later. Also was missing front tires and wheels so I had to buy some cheap Craigslist wheels/tires to get it tested.

        Comment


          #5
          Looks like a good start

          Comment


            #6
            Following along to watch you dump money in a turba golf kart to go racing.

            Comment


              #7
              Since I’ve proven in the past to be a terrible driver and testing the cages ability to save my life is a high probability. The RZR got a 1 3/4” .120 wall DOM cage and man did I get lucky. RuffStuff specialties for a short time attempted to get into producing SXS parts. They partnered with Shannon Campbell and made cage kits and chromoly suspension replacement parts. Once RS realized that Polaris and other SXS companies come out with a new model every 2 years they decided it was going to be to difficult to keep up. So after only a couple of years in the SXS game they abandoned that product line. When I called to order one they had one left on clearance, and since I’m sponsored by RuffStuff they made me a killer deal on it.

              Comment


                #8
                So I bought my RZR at a time that Polaris held the crown of every single King of the UTV’s. Then I went to KOH pretty much the next day and 2 days later Canam had swept the podium flat murdering all the competition. One of the big factors that helped make that happen was the X3-RC’s ability to run a 35” competition compound race tire while their competition can’t survive with only 32’s on them. Looking through another sponsors catalog. Milestar tires has a 34” competition compound race tire so I set my mind on making my car built for 34/35” tires and not eat itself due to the tire burden. First order of business in that vain is correcting the gear ratio keeping the engine and clutch happy. This is one place most golf cart owners DO NOT address. They just slap bigger tires on them and then get upset when they break it. To lower the gear ratio you have to do it sub trans because of the weird way they drive the front diff off of the rear ring gear with what’s called a snorkel gear. What I would call a pinion is an output not an input. Weird detail to these strangely packed 4x4’s. You can lower both high and low range by changing 2 gears. And then if you so desire, you can compound that low range change by changing two more gears. I opted for the 2 gear 24% across both ranges and so far seems like a made a good choice. I hate talking about gear changes in percentages because that’s a shitty way to address the topic. I have no visual image for 24% lower because, lower than what???? What gear ratio did I start with? Good luck figuring that out because golf cart tool bags just roll right along with percent and don’t care that that doesn’t give a good hard number to compare to. Anyway, it’s harder to get the transmission out of the buggy than it is to disassemble and reassemble the trans itself.

                Comment


                  #9
                  Cool thread, I havent really seen a U4 SxS build before.

                  Comment


                    #10
                     So after all my test driving I was pleased with its performance and it was time to really dive in on the build. I see a lot of golf cart owners upgrade one tiny little step a time and just keep blowing money on little pieces as they break and still have a buggy that they break with little effort. I don’t have the time or patience for that shit so I went full nuclear right off the bat. Long travel, boxed internally gusseted a-arms n trailing arms. 300M ball joints and axle shafts. Chromo tie rods rod ends and 7075 aluminum radius rods. It was at this point I learned that turbo S models get larger CV’s than an XP and that if I slightly relocated my front diff I could fit the biggest CV’s available. I also decided that with a little bit of fab work I could just go ahead and use Turbo S suspension which has some benefits over anything available for the XP’s. So back on the jack stands it went.

                    Comment


                      #11

                      Comment


                        #12

                        Comment


                          #13
                          Break time from the build to go play with it and take a little care of the one that takes such good care of me. This little gal doesn’t only support my racing habit, she spurs me on. I was entertaining the idea of this at the end of last year and instead of complaining about. Instead of just being ok with it. She was pushing me to do it because it makes me happy, regardless of what it cost. I disguised a test drive trip in July into a good weekend where I proposed to her. Where she obviously said “yes”. While this might not be many women’s ideal spot to be proposed to. It’s THE best spot in the world to my woman. She loves tent camping in the forest more than anyone I’ve ever met. We’ve been archery elk hunting in this area and tent camping since the end of August.

                          Comment


                            #14
                            Rules allow doors to still open but if they open have to be secured with a secondary positive latch. Got these from UTVkingz, awesome fit and super easy to install.

                            Comment


                              #15
                              Covid-19 and the boot licking supplicants that give the politicians the power/ability to shut down the country has literally ruined every plan I’ve had so far this year. Between vendors, shipping, travel bans, cancelled events it took way longer to do anything this year than it should have. That said, I was finally able to make one hard push with the help of my dad and brothers. We wired in the PCI coms. Got the Patagonia SXT’s from Milestar mounted on some Raceline beadlocks. Number plates. A RuffStuff front bumper with a 4500# race model Superwinch. UTVkingz spare tire carrier. Baja designs led rear light bar. PRP GT seats with G2 5 point harnesses.

                              Comment

                              Working...
                              X