2015 viper headers

[CHAZWILDMAN]

The evo header lands in the stock location with the same flanged connection yamaha uses. If your turbo uses the stock header the evo header will work too. So I'm told anyway

how much weight savings when install evo head pipe?

 

[Oinakka]

What benefits would one see running the header along with a turbo? Or should I say how much benefits?

 

[Evolution Powersports]

Here are pictures of our "New" Viper header. Although we have had excellent durability with our normal braided flex Fjointed equipped headers, we have moved to a bellows style flex joint. The reason is this style joint is specifically designed for the heat and pressure that a turbo system will exert on the pre turbo exhaust. They are also used on many European turbocharged cars use when some flexibility is needed in the exhaust system before the turbocharger. For moderate to higher boost applications, this is the best possible design.

All headers that have been ordered but not shipped yet will be this style.

 

[b_sandgren]

What are the signs of a broken or cracked header? Wont build boost?

 

[Mountaintech]

I've built a lot of Yamaha sleds, front mounts, rear mounts, mid mounts and NA sleds. The single best improvement I've felt/made on any Yamaha sled was to use a Rev tank on my Rx1. That one mod changed the handling of that sled dramatically. Kudos to the Doo engineers for that one, they had and still have balance figured out. I don't see the same level of thought/planning in the Viper, witness the header, at best its a factory mod sled. When Yamaha brought out the Nytro it was a clean sheet of paper all be it with it's issues but still, this new sled is a retrofit, it's just not the final answer and hopefully its not their best effort.

Again JMO


M5

Moving the fuel tank works wonders on the Nytro too.

 

[christopher]

Moving some of the weight rearwards could only help.

 

[RACINSTATION]

Moving some of the weight rearwards could only help.

I noticed on mine when I push the flipper to the bar it seems all the weight moves to the rear quickly?

 

[CatRpillar]

Maybe I'll get slaughtered here, likely but here goes.

That header design is the reason I have no interest in the Viper. I can't possibly see how a design that clearly evolved from:

"Hey how about we phone up Cat and just jam the Nytro motor into a Cat chassis and see how that goes".
"But what about the exhaust?"
"No problem we can just make it do a 180 and put all the weight up front, no one will even notice"
"We will just let the aftermarket guys solve all the problems with turbos"

By the time the exhaust does the 180 and gets to turbo it has easily encountered as much resistance and travelled as far as a Nytro straight thru system on a rear mount which incidentally balances the sled perfectly, I'm sorry if your supercharged Nytro was a front heavy POS but I told you so 5 years ago. When doing a forced air heating system in a home a single 90 degree bend creates as much resistance as a 10 foot run of straight pipe.

I really don't see the draw of this sled, sorry. I've been running Cat geometry skids in my Nytros since 2008, everyone said I was nuts now that the Yamacat is out everyone says how great they handle, well duh.

My MCX turbo Nytro is sub 600 and my Nypex is 610 RTR, the Viper isn't even an improvement in weight really and it has a crappy exhaust design.

JMO

Maybe the Viper will bring about world peace.LOL

M5

I guess we now know why HVAC guys don't design exhaust systems.

Some guys just don't like change.....

 

[christopher]

I noticed on mine when I push the flipper to the bar it seems all the weight moves to the rear quickly?

Ya Buddy!
And the more boost you have, the quicker the weight transfers.