Deck / Head Milling HELP !

[Steviebee]

I tried the busa motor but couldnt get enough rear grip to pass you.

Now im looking for a 1000.

[Clarkie49]

As to being dissapointed w/ 112 hp, it's a matter of efficiency.  I am very meticulous in preparing a bike so I expect great things... 112 should be attainable out of the box with a slip on and no power commander.  More power is always good and I certainly spend plenty of time on setup and suspension to get it to the pavement.  I look at the Ten Kate bike and that beast has a claimed 135hp... from a super sport 600!  Now even taking off for some fudging it probably still makes 128-130.  I think 120 hp on pump gas (or 123 on MR-9) is a very reasonable goal.  It certainly helps in the unlimited GP !

Larry - Ten Kate always claims hp at the crank, but i have heard they are getting around 130hp at the rear wheel, they cannot use the oxygenated fuels over here like U4, MR1 etc. (MR1 makes more power than MR9 and MR1 and U4 make the same power except U4 isnt AMA legal....but then neither is my bike :) )

i have built my 600RR to the HRC specs and it started out making 108hp on pump gas with a Two Bros slip-on and now it is making 117hp on pump gas with the same slip-on ( i have an Arrow race system on the way)

the bike has had the head decked, radius valve job, ported heads, HRC velocity stacks/filter, stock degreed cams, and a few other little mods here and there.  I am confident it will make 120hp on pump gas and the MR1 is worth 4-5% which should take it up to around 125hp.  i could squeeze the head a little tighter and with the HRC cams it should make close to 130hp on good juice  8)

all the runs are done on our eddy current dyno with the numbers converted to 'dynojet hp'

[cardzilla]

Did you do all the work yourself?  I'm curious to see the squish zone calculations and corresponding amounts to mill the head/deck.  I haven't done the measurements on mine, but I'm sure degreeing (?) the cams is an absolute necessity.  Anyway, keep me up to date, it is good to have a number to shoot for... even though my bike has to stay supersport legal.
PS - email me on what is happening with our cement mailing friend... hopefully, he's locked down  ;)

[Clarkie49]

an investigation is in progress  ;)

yeah i have done everything myself, my head measured up with 0.033" piston-head which is huge, you can run down to 0.025" in a 600 pretty easily.  the HRC specs say to mill 0.10" off the head and you can either take another 0.008" off the top of the cylinder as well (for AMA rules) or slipit the 3 piece head gasket (0.007" per layer).

the HRC manual wants the piston to valve clearance to be 0.040" whish is quite big as well but what ever it takes to not bounce an exhaust valve  :)

the stock cam timing is 100.5' int/107.5' exh and the HRC specs take you to 104.5/107.5 but the HRC cams have 10' more duration as well which is why the intake cam is a little retarded.

one thing i did find is that my crank was out 20 grams at each end before i had it balanced, might be an idea if you are going to get your motor done, it wont make more power but it will definitely be easier on the engine.

once i have finished building this motor and i come up with a final hp# i think i might put the stock stacks back in and get another stock head and see what i can get from an 'AMA legal' motor.  this motor is more just to see what i can get from it, something to do  ;D

as for staying supersport legal...............................come on now, you would be the only one  ;)

[mdr14]

Horsepower #'s are great if you are measuring penis size.

Bottom line, did your bike accelerate out of the corner better and get to the end of the straight faster than your competition.

It is a fact that a bike dynoed in the midwest during the middle of the summer will read less horsepower than the same bike trailered down to florida sea level. Or even during the middle of the winter in the midwest.

I have built motors and had them dynoed  on Our Dynojet model 250 dyno at the shop before Race of Champions. It was common to see those same bikes at Daytona pick up several horsepower.

My point there is that you can't race a dyno. It is good for tuning, & troubleshooting.

You can't realisticly compare Horsepower #'s from other brands of dynos or dynos from other parts of the country.

Find someone that you know and trust and work with them. You will see your results on the track.
But guess what? Everyone is subject to the same conditions when you race.

I do know this, at the AMA National at ROAD AMERICA, Dan Ortega posted the 6th fastest trap speed in the 600 Supersport race. And guess what? his www.mdracingstp.com built motor wasn't close to 120 hp.

[Clarkie49]

i totally agree, everything i do consists of a before and after graph so the customer and i can actually see the gains from everything done to the bike (even just doing a custom map).

rather than focus on the final number i get my customers to focus on the percentage of hp gains, but you can also just change the correction factor to '1' to see what the bike is really putting out.  Dynos have this clever things called a correction factor and although the bike may actually gain 5hp down at Daytona the bike should 'read' the same hp, well it does on an addy current dyno

i have also raced at RA and i know that the draft is just as important as HP at that track  :)

[Bruce_S]

If you're looking for good work close to Florida, call Jeff Walker at Cooper Performance.  They're in Unadilla, Ga., about 30 mins north of Tifton.  Heads are thier specialty, they do alot of drag work and can really make the power.  Jeff's number is 478-627-9393.

If you are familiar with Star Racing, then you know the work.

[cardzilla]

Thanks, Bruce.  I will check him out.  I have decided to do all the theoretical stuff myself (measurements / cams, etc. ) and just have someone else do the actual machining to my specs.  

[WebCrush]

I have KWS Hi-Comp pistons and a lot of milling off my block. Coupled with cam changes, falicon crank and carillo rods Pat at New England Perf was able to squeeze 135hp out of my 600.

Nothing like going to Daytona and having a top guy like Jeff Wood who is 6-7 seconds faster than me tell me that my bike's got motor and that I'd pull away from him on the banking. :D :D

[eh427]

I have a Honda 600rr and am looking to get some motor work done. Cams, head milled. What kind of costs would I be looking at roughly and is there someone good in the northeast area to do that?

[WebCrush]

I have a Honda 600rr and am looking to get some motor work done. Cams, head milled. What kind of costs would I be looking at roughly and is there someone good in the northeast area to do that?

where in the northeast are you located?

[eh427]

I am located in New Jersey.