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Post by red19lite on Dec 14, 2013 7:46:12 GMT -6
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Post by red19lite on Dec 14, 2013 7:50:18 GMT -6
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Post by magnesium on Dec 14, 2013 9:08:50 GMT -6
Kevin, what RPM are you aiming at?
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Post by jonsbadcats on Dec 14, 2013 13:01:33 GMT -6
dynomite!!!! lol lol
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Post by snosnake on Dec 14, 2013 17:02:12 GMT -6
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Post by magnesium on Dec 14, 2013 18:02:32 GMT -6
The Yamaha Vmax4 and the Xenoah shared nearly identical port configuration. Yamaha added triple exhaust porting to the 800, looks just like Kevin's tidy work. Some racers spun the 800 over 11,000 rpm at the crank. |
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Post by red19lite on Dec 14, 2013 23:05:56 GMT -6
The Yamaha Vmax4 and the Xenoah shared nearly identical port configuration. Yamaha added triple exhaust porting to the 800, looks just like Kevin's tidy work. Some racers spun the 800 over 11,000 rpm at the crank. why not, got some broke up cylinders anyway that need fixed, probally looking at turning 9500 rpms got a crank that,s been readjusted to eliminate high rpm harmonics, might as well give it a try, Attachment Deleted the engine test stand I have been piecing together all year , the dyno I have a lot to learn about, but I am having fun playing with it, its not a super expensive set up but it keeps chewing at your wallet one thing leads to another and another , now I know why there,s so much black art about these thing,s now if I could rub my head and tummy at the same time  |
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Post by Ruppsforever on Dec 15, 2013 10:33:55 GMT -6
Kevin, have you done a dyno test with boyesen petals on stock reed cages versus your new V-force reeds ??
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Post by red19lite on Dec 15, 2013 12:50:39 GMT -6
Kevin, have you done a dyno test with boyesen petals on stock reed cages versus your new V-force reeds ?? not yet josh, haven't mastered the manual load and throttle yet, had a very peeky set up on it first time out that was a mistake, its, a work in progress , suck,s a lot of time, I will run a milder engine for base line then start changing things around then I,ll let you know, going to add egts and afr ,hey how close is your next househould of people how quick do they get pee 8-)d at this deal? chipper our husky dog all ready is pissed about it,need to get some noise control going  |
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Post by Ruppsforever on Dec 15, 2013 20:29:33 GMT -6
Dad's neighbors are about 1/4 mile away. So we don't have problems with that. We did at one time have a stray cat that hung around us in the shop when we were out there. We named him Nitro. I would get him out of the shop before I would make a dyno run on my 340. Otherwise the poor bastard would of been deaf !!! LOL !!! The last time I ran my 340 on the dyno he never returned.  |
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Post by red19lite on Dec 15, 2013 21:25:42 GMT -6
Dad's neighbors are about 1/4 mile away. So we don't have problems with that. We did at one time have a stray cat that hung around us in the shop when we were out there. We named him Nitro. I would get him out of the shop before I would make a dyno run on my 340. Otherwise the poor bastard would of been deaf !!! LOL !!! The last time I ran my 340 on the dyno he never returned. yea those pipes scare all the pussey away |
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Post by snosnake on Dec 15, 2013 21:39:46 GMT -6
The Yamaha Vmax4 and the Xenoah shared nearly identical port configuration. Yamaha added triple exhaust porting to the 800, looks just like Kevin's tidy work. Some racers spun the 800 over 11,000 rpm at the crank. Mark I was just picking on him because it was a 250. I think Kevin knew that. |
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Post by magnesium on Dec 16, 2013 6:57:07 GMT -6
Maybe people bought 250's because they felt sorry for them? Rupp wanted a sled to compete with the Kitty Kat?
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Post by red19lite on Dec 16, 2013 7:26:00 GMT -6
Maybe people bought 250's because they felt sorry for them? Rupp wanted a sled to compete with the Kitty Kat? then they put pipes on them, and scared the kitty kats away |
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Post by kronnikracing on Dec 16, 2013 7:59:46 GMT -6
Well when you find some pipes that work on these dam things let me know. Im in for a set. dam 250's.
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Post by kronnikracing on Dec 18, 2013 14:25:11 GMT -6
Kevin have you found more than say 30 hp out of these yet? Im being serious. And im very interested. We dynoed our 250 probably 40 times and barely broke the 30 hp barrier. In stock form im talking.
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Post by magnesium on Dec 18, 2013 15:35:52 GMT -6
Gotta ask, what's the bore and stroke of the 250?.......OK, found it. I wonder if crankcase compression ratio is high enough.
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Post by red19lite on Dec 19, 2013 0:41:29 GMT -6
Kevin have you found more than say 30 hp out of these yet? Im being serious. And im very interested. We dynoed our 250 probably 40 times and barely broke the 30 hp barrier. In stock form im talking. haven't dyno one yet, got one engine almost together, no time to get it done, 30 don't seem like much does it |
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Post by kronnikracing on Dec 19, 2013 6:55:17 GMT -6
No not at all, we know with pipes that number would jump dramatically but seems even low considering how heavy the liquid 76's were. Hard to believe they would be fun at all on the trails. Magnesium, im pretty sure that josh did some crank case stuffing but i cant remember. Maybe he will chime in and let us know.
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Post by rupptimer on Dec 19, 2013 8:14:03 GMT -6
also working on run in stand What is the point of the pillow block bearings and jackshaft on a run in stand? All you need is a fixed shaft for the dyno support. Also your dyno would work better if you got the dyno positioned so the drain was at the bottom (6 o'clock position). |
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