Topic: yeah right 9g's anybody

[Gordon]

eats up time while we wait and see if he emails me back lol

I'll be really surprised if he does, considering there's no way he has any real documentation to back up his claims.  He's looking for a buyer with a lot of cash and little knowledge of bikes who will be dazzled by the fancy cafe look of the bike and who won't ask too many questions. 

[77cafe750]

i tend to agree but was worth a shot and ate up a boring sunday afternoon

[Gordon]

I'm keeping my fingers crossed that he emails back a picture of a "Dyno" sheet drawn on construction paper with crayons!

[77cafe750]

that would be freakin priceless lol

[Franken750]

Oh dear. 

You boys are all being so unkind to this honest-sounding gent who is obviously SUCH a 750 enthusiast. 


For my money it looks like the south end of a north bound horse.

 

[Nikkisixx]

And I'm pretty sure the clubmans and checkered racing stripe add about 50hp. 

Snicker 

[Bwatson]

Just came across it on Ebay. http://cgi.ebay.com/ebaymotors/1975-CB-750-Cafe-Racer-/170530865343?pt=US_motorcycles#ht_540wt_1165

[77cafe750]

i just got an email back heere is what was said
but do not have the dyno sheet my buddy has a dyno he lets me use and i dont like to take up his dyno making adjustments there  i was going to make some more adjustment on jetting and timing and valve clearance and take it back for more runs but have not had time goin to try to do that sometime next week or following week but if u dont believe it u cant look hp ratings for 836 kits on internet it 98hp for just the 836 kit and this has way more then that done to it no dyno sheet

[sangyo soichiro]

i just got an email back heere is what was said
but do not have the dyno sheet my buddy has a dyno he lets me use and i dont like to take up his dyno making adjustments there  i was going to make some more adjustment on jetting and timing and valve clearance and take it back for more runs but have not had time goin to try to do that sometime next week or following week but if u dont believe it u cant look hp ratings for 836 kits on internet it 98hp for just the 836 kit and this has way more then that done to it no dyno sheet

Hmmm...
He must be getting that extra hp from those CR unspecials.  

[Nikkisixx]

but if u dont believe it u cant look hp ratings for 836 kits on internet

Um, OK.  Here ya go:

"The most effective (easiest and cheapest) way to raise the 750's performance is to increase its displacement and to improve breathing. The maximum displacement one can get with a simple bore job is 836cc. This is 110cc more than stock and, if the breathing is improved, will just about deliver the maximum reliable horsepower (about 75) of the otherwise unmodified engine."

Quoted from Motorcyclist Magazine right here on SOHC4.net   

[77cafe750]

i dont know what this guy is telling himself but i want some so my old stock displacement bike bike wil lmake 80 lol

[Markcb750]

but if u dont believe it u cant look hp ratings for 836 kits on internet

Um, OK.  Here ya go:

"The most effective (easiest and cheapest) way to raise the 750's performance is to increase its displacement and to improve breathing. The maximum displacement one can get with a simple bore job is 836cc. This is 110cc more than stock and, if the breathing is improved, will just about deliver the maximum reliable horsepower (about 75) of the otherwise unmodified engine."

Quoted from Motorcyclist Magazine right here on SOHC4.net   

So you do not believe I can get my spare motor to spin at 17,000 rpm?


The math works, if the math works it's gotta be good that's what they taught me in engineering school.

HP=Torque*RPM/5252

(2*HP) = Torque * (2*RPM)/5252

[77cafe750]

i never thought that you couldnt but i would want to be near it or on it if somethng in the old motors decides to go boom boom

[Nikkisixx]

So you do not believe I can get my spare motor to spin at 17,000 rpm?


The math works, if the math works it's gotta be good that's what they taught me in engineering school.

HP=Torque*RPM/5252

(2*HP) = Torque * (2*RPM)/5252

 If you say it Mark, it must be true!!!  I support your claims 101 proof percent!  What are you using to make it spin that fast?  Nitromethane?  Mabye a Pratt & Whitney J58 for a little "boost"?     

[xedge4lifex]

wow 130hp at the rear wheel this guy is a genius, i wrench at a shop that is probably one of the best source for stock and 100% built kz900-1000s and 110-120 at the crank is a HUGE deal.

good thing that guy put up the dyno sheet

[Duke McDukiedook]

Methinks there is crack in them pipes!!!

'Cause he smokin' lots of it!!!! 

[mick7504]

That red paint is the secret.
It releases tremendous amounts of HP and makes 'em go real fast. 

[the technological J]

if i was asking even four g's i would have a mirror polish on the side and valve covers and at least duel disks up front....... if it has everything he says... minus the HP.. its worth four g's

[77cafe750]

i dont think he is gonna be knocking 5gs off of this thing anytime soon he seems pretty proud of his bike

[seaweb11]

So you do not believe I can get my spare motor to spin at 17,000 rpm?


The math works, if the math works it's gotta be good that's what they taught me in engineering school.

HP=Torque*RPM/5252

(2*HP) = Torque * (2*RPM)/5252

 If you say it Mark, it must be true!!!  I support your claims 101 proof percent!  What are you using to make it spin that fast?  Nitromethane?  Mabye a Pratt & Whitney J58 for a little "boost"?     

Uh, I've spun my 836 Tracy past 11,000.  What does the math come out on that? 
I missed a lot of math classes in high school

serious question.

[Markcb750]

So you do not believe I can get my spare motor to spin at 17,000 rpm?


The math works, if the math works it's gotta be good that's what they taught me in engineering school.

HP=Torque*RPM/5252

(2*HP) = Torque * (2*RPM)/5252

 If you say it Mark, it must be true!!!  I support your claims 101 proof percent!  What are you using to make it spin that fast?  Nitromethane?  Mabye a Pratt & Whitney J58 for a little "boost"?     

Uh, I've spun my 836 Tracy past 11,000.  What does the math come out on that? 
I missed a lot of math classes in high school

serious question.

The serious answer is 104 HP.

Based on the ASSumption that the torque produced by the increase in displacement is proportional to a stock motor. 

This assumption indicates a torque increases from a stock motors 43 to 44 foot lbs to 49 to 50 ft lbs.
Theoretically.


Pumping & frictional losses will make the actual HP number significantly less.  Unless you spend the time to properly design the airflow into and out of the motor, including altering the angle between the valves, the combustion chamber, and the intake /exhaust ports.

[KeithTurk]

Hmmmm 75hp plus a 75hp Nitrous shot ....  might be 130 at the tire...


( 75hp Nitrous shot is a single cylinder hit on a pro mod car... for the first of 4 stages )

[Nikkisixx]

Here is the rule of thumb for horsepower on a NORMALY ASPIRATED engine I've always used:

1 horse per cube and you are smarter than the average bear - that is a 300 horse 5.0 mustang.  Stock 5 liters made around 200.

2 horse per cube and you're almost good enough to go fast and turn left - a 700 HP 350 CID stock car.  How 'bout that Kyle Busch?

3 horse per cube and you are going NHRA Pro stock 500 CID making 1500 HP.  200 MPH quarters anyone?

4 horses per cube and you should go work for NASA.  Seriously dude, that is badass.

There are about 61 cubic inches in a liter (5.0 is a 302 after all).  An 883 cc engine is .883 X 61 or about 54 cubes.  

[77cafe750]

so are you sayin its somewhere between a stock car and prostock lol and why did you have to say anyhting about cry baby kyle

[Markcb750]

BMW's new 1000RR makes 193 hp from 61 cubic inches.  3.16hp/cubic inch.  A little NO should make it qualify for a moon shot.


And the closed loop F.I. should make it adapt to the additional oxygen without a debate about a 160 or 180 main jet.