Snowmobile Fanatics banner

1 - 5 of 5 Posts

·
Registered
Joined
·
18 Posts
Discussion Starter #1
I have a '93 RXL with PSI tripple pipes and chip, If I have my jugs ported or buy a ported set would that cause any problems -- ie. lean condition? Or will the computer be smart enough to compensate for the additional flow?
 

·
Registered
Joined
·
11,943 Posts
The EFI system on that sled doesn't know how to compensate for changes in power output. If you do anything with porting, pipes, or compression the fuel map will have to be adjusted. On that sled a new chip has to be installed, you can not just flash a new program into it. Some companies tell you to just increase the rail pressure but that will giv you a poor calibration every where except full throttle. Not a good idea for normal riding.
 

·
Registered
Joined
·
18 Posts
Discussion Starter #3
Hmmmmmmmm, what about converting to carbs? I've read of people that have done this, how difficult exactly is it? One would need a set of 38mm carbs and boots, but what else? What about a fuel pump, ignition, airbox, and exhaust? Could I re-use any of these from my rxl? How trail-worthy/reliable is a ported 650 with tripple pipes?
 

·
Registered
Joined
·
589 Posts
Carb conversion is pretty simple, provided you can set and adjust carbs. You will need to get a set of carb boots off a XCR 600, and a fuel pump. The intake ports on the RXL are larger than the standard 650, so you can't just use 650 carb boots. You also will need to install a pulse line on the engine for the fuel pump. As far as a airbox, you could get a standard 650 airbox, or install individual filters. The best way to keep her reliable is with EGT gauges. Once your done, she will scream.
 

·
Registered
Joined
·
133 Posts
you will need 3 38mm roundslides 260 mains, Q2 needle jet, 6dh4-3 jet needle, 50 pilot, fuel pump, i've heard that 650 carb boots will work, but not sure. throttle cables, choke cables, 650 airbox and a trash can to throw the efi stuff into hehe, actually sell it on ebay. Ignition system is different than the 650, but will work. Carb settings are for a stock piped 650.
 
1 - 5 of 5 Posts
Top