Sneaking up on 200hp at the rear wheel.

All the best of luck to you on your dyno runs,do you notice an increase in vibration with your balancer removed,some people have said that you should balance the crank if you're going to do this,how is it running?
 
Your already moving at a rapid pace with the additions you've made.
Next I would recommend the yosh drop ins for 10 to 12 more hp for 700.00 plus labor.
Thats the next most effective bang for the buck item on the agenda.
Seems like your after the same type of bike as me.
If so you'll be keeping it stock bore.
 
Rick- Do it. You wouldn't know it was missing unless I told you. Just makes it feel a little more "serious" if that makes any sense. The one thing that I love that no one has mentioned is that it is way easier to rev-match my downshifts with the balancer gone. I think that it was geared at 2:1 to the crank, so it had a substantial "flywheel" effect. You can feel 5lbs of weight when you are riding. The additional horsepressure is appreciated. The cost was zip. I must restate: Do it. I don't know your mechanical ability, but if are uncomfortable working inside your motor, remove your bodywork and exhaust and I'll do it for you. e-mail me your phone number to kirkcpyland@integrityonline.com
 
OMEGA- The Yosh drop-ins are too expensive and too wimpy for me. Web Cams makes a drop-in grind that the nice lady on the phone promised me would put me over 200hp at the rear wheel with my combo. It is called the 536/577 and it is significantly badder than the stage 1 Yosh cams. It requires different springs, but the valve guides to not need to be cut down for clearance. That will be my winter project along with throttle body stuff. I am not lifting the head unless it blows up, even though it has a really conservative compression ratio. Oh yeah; the Web 536/577 cams are $580.00.
 
I run the 395 lift Web cams and you don't have to do any valve guide work them either.

Omega, I think I would go with the stock bore JE pistons before I would the cams.

Who do you know that has gotten 10 to 12hp from Yosh drop in cams?
 
Web cams
Wiesco stock bore pistons
Adj. cam sprockets.
Head work by KWS motorsports in Charleston SC
Yoshi pipe and PC2
Brock Clutch mod
KWS valve springs Don Smith 186.8

This is an example
 
I'll have it on the dyno next week at NW Cycle. Want to stop by? I may be all wet here, but MH says Muzzy ti, airbox mod, PCII, remove PAIR, remove counterbalancer= 22hp. If I start with 163 (a number pulled out of thin air) that makes 185. either way, this thing is a monster, and I don't mean like the one that Ducati makes. Your list of mods indicates balancer not removed, airbox mod not done, Yosh pipe. All of these things will hurt you. I'm not suprised that it took head work to get to 186hp.
 
Kirk,

FWIW, I would set your sights on anything over 170hp. I have seen too many people disappointed with their dyno results. I am NOT saying that you won't attain that "185", but I would be real surprised to see it.

Remember MOTOR's dyno'd @ about 168hp I believe. And Frank is "only" @ 191 with his mods. And we all know he has done a lot of homework.

The average Busa's I have dyno'd are about 155 hp stock. If you gained 20hp on that I would be more than satisfied. Average pipe/remap/box mod gains 10-14hp. I can't see loosing the balancer gaining more than 6-8hp...but I have NOT proven this yet.

Best of luck, dynos do not lie....

Dave
 
Thats 194.1hp.

We think it's more than that because I found the airbox only attached to one of the throttle bodies when I got home.

When We tried to run without an airbox I lost 4hp.

If thats the case it could be closer to 200hp.

But since I have a sheet that says 194.1 thats what I'll stay with untill I see otherwise.

(It feels like 200hp though)

[This message has been edited by frank adams (edited 04 August 2000).]
 
Have gasflowed head , hindle exhaust and are getting 188 HP . The zx12 with acro exhaust has gotten 183 with no other changes

Post e mail adress to see dynos if you are interested
 
you guys make me laugh.

200hp wow !!! not

billet camshafts (stage one)
12.5 pistons
lightened and bal. crackshaft (no balancer)
yosh. exhaust
normal head work (i.e. porting)
2nd generation fuel mapping (2stage)
custom air box with inlarged ram ducks

221.7hp @10750r.p.m.
109.2lbs @8050
busa is not for dragracing anymore
getting the hp out of the motor in not the hard part its getting it to take the turns faster.
i just have to keep the front end from going away like at mid ohio race.
 
Those mods were an example. My mods are;
Motorhead airbox
muzzy fan
pair removal
akrapovic pipe
PC-2
I can't believe motorhead would say that you could get 185H.P. with your mods,he knows better than that!
 
Hangman, what interests me most is the 2 stage 2nd generation mapping and the custom box.
Everything else you mention is next on my bike. I'm trying to create an R1 crusher not a dragbike.
Would you mind filling me in on those 2 things?
omegaltd@gateway.net
 
Kirk, putting that grind in an otherwize stock motor is insane. Go with frank's grind its used 5 times as much as the grind you mention. Also forget about the twisties you love, that grind is strictly for dragbikes. Peak numbers will go way north on the rpm range.
Frank, pete got a 15rwhp increase from the stage 1 cams. I attribute a great deal of that to the box, the rest to the map.
For me the yosh's are perfect and can be built on with the 12.5:1 pistons and the head and valve work. The balancer is going also but I'm gonna send the crank out to falicon or ape for the treatment.
 
Kirk,
I am also using the Web Cams 395/378. In my case these cams would not clear the guides. So before you just drop them in, you need to check this or you may have problems.
 
That has to make you think Kirk.

One guy takes the 395 lift cams and does absolutely no machine work to the for them to work.

The other guy has the same type of cams and can't get them to work without doing machine work first.

These two Busa's must have came off the assembly line on different days?

What do you think you might be gaining by not useing a lid on your airbox?

I think what needs to be done is not to worry about modding the airbox's any further than what they all ready are but to start looking into a way to simulate ram air.

Without being able to pump the right amount of air into it on the dyno theres noway of really knowing if your mods working or not.

How can you really tune a pc2 when theres noway to how much more or less fuel you may need, like it would be when the bike is running down the road?

When the box is pressurised you don't think the fuel curve will need to be changed,..I do!


Heres an experiment for the back yard guy:

The craftsman shop vac says if you attach their cone nozzle it blows 150mph of air.

Take two of these shop vacs, each one blowing into each side of the air inlet tubes on the front of the bike, and try this on the dyno.

Since we have heard that the box fully pressurises at 141mph this experiment should pressurise the box, and then we may have some better idea what works and what don't??

(just a back yard thought)
 
Frank- No kidding. Is that the one that is one step bigger than the 536/577 grind? Anything worth doing is worth doing to excess, I guess that's why we own the fastest bike on the planet to start with. What kind of numbers are you able to put up with that grind?
 
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