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well unfortunately it looks like our season could be at its end once again with none of that great March riding we always loved. Started out riding a lot, mainly on my cat 800..had some things I was trying on that so the viper didn't get much use the first part of the season. Started riding it...

just pulled skid out of my 2014 and stripped it all down to get the rails powdercoated, getting them done in Yamaha blue to match the spindles I had done last summer. Sled has just shy of 5000 miles and I'm on all the original wheels/bearings and original trihub which feels as tight as a new one...

curious is anyone with a stock or n/a viper has used smaller rollers in the primary? Seems I remember reading years back how a lot of nytro guys liked that approach. I run apex 14.5mm rollers on my turbo, engagement is noticeably lower and rpm's seemed to hold very consistent and never have any...

in regards to the recent thread on stutter setup using an ignition module I thought a new thread with pictures would be very helpful. I need to start off by saying that I had a lot of help and guidance with getting everything wired in right so that it functioned properly. I picked a few peoples...

Anyone else got some good sled pics to help pass the time?

anyone have info on a real stiff preload primary spring? Running GWG with 2 shims (4mm total) and still can't get engagement high enough where I want it. This is a turbo with heavy weights. I'm using gates belt which is wider and 14.5mm rollers so those are working against me a bit but gotta...

last ride out I noticed my temp gauge started going haywire. Temps are normally 159-162, while riding it would go as low as 120 and jump as high as 170 but it would flash 10 degrees up or down in a matter of seconds and would just keep flashing random numbers. Haven't had anything done to it...

Been wanting to get the engagement up on my turbo. Using a GWG primary spring so very stiff preload but still only engaging around 3100 and I want to get it higher. I ended up cutting out some shims with our plasma cutter, the steel I used was 1.5 mm thick and I put one shin on each end of the...

got some parts coming to put together a big k&n style air filter with an internal bellmouth. Anyone have anything similar or done anything like this with turbo trail sleds in the past? I know they're a popular setup with the huge boost drag sleds but this will be on a trail sled, just hoping to...

Dyno results from a 2016 w/ mpi trail turbo. any chance they're programming them differently for the 2016 engines?

Got my new colored front end all put on and love the new look vs. the all black that was on there! I bought a used set of white a-arms off a procross cat which bolted right up and green spindles which I had powdercoated blue and it matches perfect! Next project is pulling the rear bumper and...

Had the chance to dyno my sled today and learned quite a bit. Some details on the sled: 2014 viper, 3800 miles, mpi turbo w/ innercooler, .092" head shim from Allen Ulmer along with his pc5 pti base map, mpi fuel pump upgrade, 430cc injectors from hurricane Dave and a few different mufflers. Our...

Wanted to Powdercoat a bunch of stuff on the viper last summer but it never happened, hoping to do it this summer. I'd like to match the theme of the Arctic cat in the picture as far as the front end. Thinking white a-arms and blue spindles. More than likely going to get one of the Yamaha...

does anyone have a formula or can someone figure out the comp ratio of a viper engine, stock internals with a .051" thick head gasket? I believe stock head gasket is around .020"?

anybody have any back to back dyno numbers comparing the 2 at the same boost levels? I know the loud one makes more, curious how much more, especially at higher boost levels around 8-10 pounds.

Finally got some snow last night, only a few inches at my place. Had my buddies 7000 out for 10 miles or so between this more and this afternoon, this is the first its been run enough to say so since last season. Sled felt strong, pulled a consistent 8700-8730 rpm, fairly short distance, top...

looking for some concrete opinions from guys who have changed gearing on an n/a sled. I'm going to be changing the gearing on a buddies cat 7000, with the gearing formula it shows their stock gearing is only good to 94 mph and I believe that is at 1:1 which I don't know if it'll pull that or...

Need to get more fuel supply on my mpi turbo, got the upgraded fuel pump but need more fuel. I can send my stock injectors out to get opened up some to run safe at higher boost, $50 per injector, or another option is the 4th injector. Im going to be using a pc5 pti for tuning, so unless there's...

hope this video helps, removing the hood is a simple task that takes less than 5 minutes.