Shouldjustbuyanewsled
New member
I bought a set of CPR triple pipes for my viper and need the clutching and jetting specs to get it working right, can anyone help?
Lil' Mtndreamer
New member
What’s your altitude, got airbox mod?
Shouldjustbuyanewsled
New member
I'm at sea level and my only air box mod is the mice chewed a hole in my foam
Shouldjustbuyanewsled
New member
Also should mention the intended useage for this thing is occasional short trail ride but primarily lake drags/radar with the boys type deal.
Shouldjustbuyanewsled
New member
Well I contacted cpr themselves, got a decent staring point so I'm going to set it up like he instructed me too, I'd still love to hear what others are doing successfully...
super1c
Super Moderator
Ill be north for my notes and will post what i ran on my CPR viper! Loved those pipes! wish i still had them.
super1c
Super Moderator
This was my set up with carb vent to air box.
PTO 160 mains / 47.5 pilot/ needle clip 4th groove both washers on top
Center 160 mains / 47.5 pilot / needle clip 4th groove both washers on top
Mag 162.5 mains / 50 pilot / needle blip 4th groove both on bottom.
Plugs ran nice and brown with room for cold weather. If it was warm i could run carb vents to atmosphere and be good. Never had a DCS light problem with good fresh 93 octain. A little octain boost wouldnt hurt either with these pipes.
PTO 160 mains / 47.5 pilot/ needle clip 4th groove both washers on top
Center 160 mains / 47.5 pilot / needle clip 4th groove both washers on top
Mag 162.5 mains / 50 pilot / needle blip 4th groove both on bottom.
Plugs ran nice and brown with room for cold weather. If it was warm i could run carb vents to atmosphere and be good. Never had a DCS light problem with good fresh 93 octain. A little octain boost wouldnt hurt either with these pipes.
Shouldjustbuyanewsled
New member
Got the sled out for the first time today, im running heel clicker drag n fly primary weights loaded With 4.4 in overdrive hole and 4.4 in shoulder with a red spring (they recommend grey but I don't have one) and a straight 45 helix with a green spring at 70, comes out of the hole soft but about 20 feet out the rpms jump up to 85-88 and it quickly climbs up to 9100 or so and pulls hard, I am going to put srx mounts on and set belt deflection see if it helps out of hole
super1c
Super Moderator
Get the SRX wishbone torque limiter also. Really helps lock engine in place and set clutch Center to center and belt deflection per SRX specs. The viper clutches were made with that engine flexing in mind. With the SRX mounts and wishbone torque limiter it wont move at all.
Shouldjustbuyanewsled
New member
Got the front left srx mount and the srx torque rod installed, the other mounts looked identical so I left them. I re aligned the clutches and its unbelievable how much more rigid the engine is mounted now, this was 100% bolt on too, great upgrade to a viper. I haven't got a chance to try it but it's going to be better, I might switch the stock 22/38 gearing to srx's 23/38 next