10-21-2014, 12:10 AM #1
Video: RIVA Racing Spins Yamaha SVHO to 9,000RPM, Makes 375HP On Pump Gas
There’s all sorts of junk out there professing to increase horsepower, from fuel additives to air filters. We’re not exactly sure where or how they’re able to substantiate their claims, but there’s no shortage of hucksters promising increased performance if only you’ll fork over your hard-earned cash.
The big difference between those who claim to make power and those who actually do is evidence. RIVA Racing‘s parts make power, and that claim is backed by hours and hours and hours of testing, both on the water in the dyno room. So when RIVA’s head shop dog, Mark Scheffield made us wise to a certain dyno session, we were all ears.
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Last edited by Rustymuscle; 10-21-2014 at 07:56 AM.
10-22-2014, 07:04 PM #2
Seriously?! How is this not going viral?
RIVA unlocked all the hidden horsepower in the SVHO with just a handful of bolt-on parts. This is HUGE news, folks. There's no other engine that can make power like this with just a few mods.
How are the Yamaha guys not rubbing this in the faces of every Sea-Doo guy on this forum?
10-23-2014, 09:18 PM #3
Because dyno wars is not real world. As stated, 375hp was a "lets see what happens" (hail-mary) move and even Riva doesn't recommend spinning it that high (9K) to get this HP rating (and suggest race gas). What they need to do is post a video of the more honest stage 2 setup.
In practically every situation, the bigger C.I.D will always win. I want to see Yamaha make a 2.5L N/A!
Yes its impressive but...mehh...
10-24-2014, 12:15 AM #4
Fk paint flakes Yami motors rock!!!! Paint flakes because of performance!!!
10-24-2014, 08:42 AM #5
Sanfish, take a closer look at the dyno graph. Peak horsepower was at 8,600rpm, well within the proper "real world" threshold. The push to 9,000rpm was, as RIVA said, "to see if it could even do it." Which, it did.
The big qualifier as this being a significant revelation is that the 375HP number was achieved with 95% bolt on parts (the valve spring retainers being the only "intrusive" addition). That's a pretty amazing feat.
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