Well guys I finally got my little winter project done. I figured I better get it put on here as there has been alot of guys wondering about what chassis's the Apex motor will work in. It took me alittle longer to finish than I had planned but it's mostly done other than some tuning here and there. I started off with a new 08 rolling Dragon chassis and a 06 Apex GT. We kind of started on it last season but kind of side tracked over summer but got started working on it in November and finished it up about a week ago. It runs good and everything works fine on it so far. It definitly has been a hard process of getting the Apex engine mounted up right and everything else to work with it in the chassis. The chassis uses all the yamaha drive system which made it alot easier to mount the motor b'cos with the stock rmk chain case it didn't allow for the engine to sit down in the chassis and lay back like it should. The yamaha case is alot shorter and the brake sits on the side of the shaft allowing for alot more layback room. The motor is mounted about as far back and down as it could go in the chassis. It's amazing how well the motor fits in the RMK chassis almost like it was meant to be in there.
Here's a list of all that was done to the chassis and what parts are in it. The bulkhead was cut and we welded a cross tube in so the jack shaft could drop down in the chassis b'cos we centered the chain case up with the existing drive shaft hole so the drive shaft would be in the same place as the stock rmk. With the yammy case being shorter that made the jackshaft drop down about 1/4" or so that's the reason for the U tube in the bulkhead. Next we had to deal with the shafts as they are longer the the one's that came out of the polaris. The drive shaft we made shims for the bearing and the jackshaft we had shortened up about 1". I'm using avid 7 tooth drivers on the drive shaft and running a Camoplast 174x15x2.5 track it originally was a 16 wide but we cut it down with a table saw. I put straight Ice Age rails on the suspension for now but might change it out for my Timbersled rear skid I have. We'll see how it works out.
The turbo sytem is kind of a mix and match of parts from different turbo systems. The intercooler and turbo are Alpine and the header is a modified Boondocker side mount. The fueling is controlled by a MSD pump and BEGI fuel regulator and pure logic control box. I'm also running a prologger to control boost and read the AF/R's. The turbo is a Garrett 2860.
The steering system was also a major project it's self as we had to figure out the best way to go about it. We thought about trying to go over the motor but that doesn't work out so well, so we figured out how to make it steer around and under the engine. It worked out really good and steers great now.
Well I hope everyone appreciates my project and the hard work and long hours spent to get it done. Here's some pics from the start of the build to the finished end. Hope you guys like them. Sorry for being so long winded but there's alot to explain.
Here's a list of all that was done to the chassis and what parts are in it. The bulkhead was cut and we welded a cross tube in so the jack shaft could drop down in the chassis b'cos we centered the chain case up with the existing drive shaft hole so the drive shaft would be in the same place as the stock rmk. With the yammy case being shorter that made the jackshaft drop down about 1/4" or so that's the reason for the U tube in the bulkhead. Next we had to deal with the shafts as they are longer the the one's that came out of the polaris. The drive shaft we made shims for the bearing and the jackshaft we had shortened up about 1". I'm using avid 7 tooth drivers on the drive shaft and running a Camoplast 174x15x2.5 track it originally was a 16 wide but we cut it down with a table saw. I put straight Ice Age rails on the suspension for now but might change it out for my Timbersled rear skid I have. We'll see how it works out.
The turbo sytem is kind of a mix and match of parts from different turbo systems. The intercooler and turbo are Alpine and the header is a modified Boondocker side mount. The fueling is controlled by a MSD pump and BEGI fuel regulator and pure logic control box. I'm also running a prologger to control boost and read the AF/R's. The turbo is a Garrett 2860.
The steering system was also a major project it's self as we had to figure out the best way to go about it. We thought about trying to go over the motor but that doesn't work out so well, so we figured out how to make it steer around and under the engine. It worked out really good and steers great now.
Well I hope everyone appreciates my project and the hard work and long hours spent to get it done. Here's some pics from the start of the build to the finished end. Hope you guys like them. Sorry for being so long winded but there's alot to explain.
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