750 with 800 pipes


No one said a 750 would beat an 800. I have 2-750s and 2-800s. I did say neck and neck. The reason I feel this way is because of rotating mass in the driveline. Remember, every pound of rotating mass is the equivalent 7 pounds of stationary mass when it comes to racing. In other words, if we had identicle sleds and you stripped 7 pounds of weight off yours and I shaved 1 pound of rotating mass from my driveline, we should still have about the same performance.
 
I NEVER SAID THAT. FASTMAX DID. AND IF HE MADE THAT MUCH OF A PERFORMANCE GAIN ON HIS 750, THAT MAKES MY POINT EVEN MORE. REALLY DON,T KNOW WHAT YOU GUYS DON,T UNDERSTAND. WE ADDED A 800 EXHAUST TO A 94 750 AND WE HAD TO REJET AND RECLUTCH. THATS ALL I NEED TO SEE. THAN WHEN WE FIELD TESTED THEM MY 800 WAS 1/2 SLED AHEAD. LOOK, LET ME UNDERSTAND THIS. YOU CAN BOLT ON QUADS ON A 750 AND ADD 18 EIGHTEEN HORSE, BUT YOU WON,T GAIN 9 BY ADDING 800 TWINS ? OK, !! LIKE I SAID LEARN SOMETHING NEW EVERYDAY AT vmax4.com. lol. 3:16 (yammie tony)
 
Use stock 800 jetting(mains and needles) if you put 800 pipes on a 750. I use a comet primary and a cat secondary on my 750. It is way different clutching than a yamaha setup.
We will see which one is faster when I get my 800 dialed in. Right now my 750 is faster than my 800. (my gut tells me the 800 is gonna win)
 
Just for the sake of conversation.

92/750 - 130hp - .1733 hp/cc

93/750 - 140hp - .1866 hp/cc

95/800 - 150hp - .1875 hp/cc

In the 800, 50cc's equates to about 9.375 hp.

I realize that there are a lot of other factors involved but it does give some idea of hp vs. cc's.
 
Ken said:
Just for the sake of conversation.

92/750 - 130hp - .1733 hp/cc

93/750 - 140hp - .1866 hp/cc

95/800 - 150hp - .1875 hp/cc

In the 800, 50cc's equates to about 9.375 hp.

I realize that there are a lot of other factors involved but it does give some idea of hp vs. cc's.
Click to expand...

This actually proves my point. You have it right here. The difference in hp is 9.3hp. Now if the pumped up pipes on the 800 make 9 extra hp then the extra 50cc's are only responsible for about .375hp. If this holds true then if you were to put pipes from a 750 on an 800 they should have 140.375 hp. Does anyone hear what I'm trying to say? The only other thing I can figure is that the 800 pipes are so perfectly designed for a 750 that they coax out 9 more hp while making no difference to an 800 letting the extra 50cc's make the hp instead. Maybe.

-Kenneth
 
I know the 750s have problems with the crank going out of phase but would adding 800 pipes increase the risk?
 
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