Any 340 Vyper’s out there with BIG HP?
The boat now has 496 HO and looking to put some 565 turning 700hp in with XR drive’s.
Can the boat handle that kind of speed, I’m located in high elevation Utah so think 93GPS

I think it would be best to take boat out and run it in all types of water and see how it handles,
340s are great roomy boats for their size,not sure about running it in the 90s,,good luck and let us know how it goes.

I have ran it locally 4500’ elevation turning 26 bravos 4950 rpm 70 gps. Felt smooth no chime walk;-)
A friend of mine has a 35 flame 95 gps was a little scary until he put the big tabs on it and now let go of the wheel no worries.

Anybody with a Vyper running in the 90s out there

70gps seems low,,I dont own a 340 but others that have posted doing 76-78 gps with 496hos 4950 rpm is at the higher end of the RPM band,maybe 28s

Elevation is the HP Killer.

A local guy was running HP500's and labbed 30's getting low 80's with his on Torch Lk... I saw his gps so he wasn't BS'ing me, but obviously your elevation is going to come into play... Torch Lk is only around 600-700' above sea level

Don't tell that to kid288 he's spinning north of 5100rpm with his

how was the ride at 80,

yea dont tell him cause if he puts a labbed 26 on hes pry gonna go by you

Derek I don't think he can spin a 26 and keep the speed up, maybe if its labbed down to a 25...

bsc- I didn't ride in it, I was just in it on the sandbar checking it out, that's when he showed me his GPS reading