3SledLuke
New member
I have a 2003 Viper and I want to improve performance and increase mpg or at least maintain the stock mpg.
Please make a recommendation: Include what to do, before and after, and that type of detail information.
Please make a recommendation: Include what to do, before and after, and that type of detail information.
KoryM
New member
i would also be very interested in this if anyone has info on it
thanks
thanks
livewire_101proof
Member
I myself am no clutching expert by any means. But I think I remember bruce at pioneer telling me once that using a kit with a high starting angle helix helps fuel millage during average riding
livewire_101proof
Member
Just was thinking. Would probably help by keeping a lower engagement so you can idle around at low speeds trail riding, but it probably wouldn't make any difference if you are an aggressive high speed rider, or use alot of studs and looking for that rocket off the starting line drag racing ur buddies.
pm kirkswim. he and turk did a set-up on his viper that rocks. we have since duplicated it on my dad's 05 venture and it stayed the same/got better fuel milage. top end is still there but it is a corner to corner set-up for in the trails.
YAMMIEGOD3:16
Active member
YOU WANT A VERY LOW BUDJET SET-UP. PROBLEY PRETTY MUCH A HELIX CHANGE FOR THE SECONDARY AND A DIFFERENT SPRING FOR PRIMARY. 3:16 (yammie tony)
gil7247
VIP Member
I picked up a set up from Super1c (Chris) and duplicated it for my other Viper. It worked great for him and cured the Viper Overrev. I would think it would help with milage too. Check w/ him on the millage he was getting and if so I can tell you the set up I got. It's easy to put together. Gil
FJViper
New member
One of Turks easy to install and inexpensive setups for the Viper is a 53/43 helix and a green secondary spring for the secondary. The Viper has an over-rev so most likely you'll have to add some tip weight to the primary.
I installed this last year on my Viper and it added quite a bit of snap. Not sure on the mileage as I still have to change out my tip weights (lost my ambition after the suck factor of last winter) but it certainly stands to reason that if the sled isn't revving out to 8900-9000 rpm's instead of 8400-8500, you're gonna save on gas and get better mileage.
I ended up ordering mine through Pioneer Performance and it was basically under a hundred bucks. I think most guys with this set-up are using a 60 or 70 degree wrap on the secondary spring. While you've got your secondary apart, make sure the 3 bolts used for belt height are not worn down. If they are, replace them. They're only a few bucks.
You can do a search for info. also.
I installed this last year on my Viper and it added quite a bit of snap. Not sure on the mileage as I still have to change out my tip weights (lost my ambition after the suck factor of last winter) but it certainly stands to reason that if the sled isn't revving out to 8900-9000 rpm's instead of 8400-8500, you're gonna save on gas and get better mileage.
I ended up ordering mine through Pioneer Performance and it was basically under a hundred bucks. I think most guys with this set-up are using a 60 or 70 degree wrap on the secondary spring. While you've got your secondary apart, make sure the 3 bolts used for belt height are not worn down. If they are, replace them. They're only a few bucks.
You can do a search for info. also.
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gil7247
VIP Member
That's exactly the kit I got from Super1C (Chris) with the addition of 4.5G or the 17.3mm weight in the tip. (same as the weight in the inner). He said it worked great for him.
Macheater
New member
Wow, great performance and mileage out of the same clutch kit? That's something I would definitely pay big-bucks for!
Seriously, those are two goals that are on very opposite ends of the performance spectrum. If you want good fuel mileage the single most important change you can make is restraining your right thumb. The beauty of this is that it doesn't cost a thing. Stock clutch setups are meant to achieve (to the best that they can) both of those goals.
Without getting into too much clutch theory, the same setup that will give great fuel mileage is NOT gonna give very good performance. For great mileage you want a setup that is gonna be low reving and overshifting at part throttle so the revs will be low at cruising speeds. And for performance you want the exact opposite. Sadly, the kind of flexibility needed from the cvt clutches to provide both of those goals is just not possible with a mechanical flyweight system alone. Until some type of electronic, hydraulic, or combination of these systems is implemented, current cvt clutches are gonna be a compromise. A truly "smart" clutch is still several years away yet.
Seriously, those are two goals that are on very opposite ends of the performance spectrum. If you want good fuel mileage the single most important change you can make is restraining your right thumb. The beauty of this is that it doesn't cost a thing. Stock clutch setups are meant to achieve (to the best that they can) both of those goals.
Without getting into too much clutch theory, the same setup that will give great fuel mileage is NOT gonna give very good performance. For great mileage you want a setup that is gonna be low reving and overshifting at part throttle so the revs will be low at cruising speeds. And for performance you want the exact opposite. Sadly, the kind of flexibility needed from the cvt clutches to provide both of those goals is just not possible with a mechanical flyweight system alone. Until some type of electronic, hydraulic, or combination of these systems is implemented, current cvt clutches are gonna be a compromise. A truly "smart" clutch is still several years away yet.