70+ Hp Xr650l


83 replies to this topic
  • Maroast

Posted October 10, 2007 - 10:17 AM

#21

really! how do you manage the heat? is it a racer or a street bike? have any pics or anything?



Take a look in his garage


Stepho, your a freakin nut job....that bike is mint!

Looking at that thing just screams "death trap" to me...can I have a ride?

  • Denn10

Posted October 10, 2007 - 10:22 AM

#22

Turbo charged XRL YEAH YEAH put about 6-10 lbs of boost and you can get 70+ for a few mins maybe LOL i wanna see someone turbo a dirtbike!!!

  • Maroast

Posted October 10, 2007 - 10:44 AM

#23

Turbo charged XRL YEAH YEAH put about 6-10 lbs of boost and you can get 70+ for a few mins maybe LOL i wanna see someone turbo a dirtbike!!!



xr650r baby!!!!!! http://www.fourstrok...R650RTurbo.html

  • martinfan30

Posted October 10, 2007 - 11:19 AM

#24

what i'd give for 5 minutes on that!

  • Denn10

Posted October 10, 2007 - 01:36 PM

#25

thats BAD ASS!!!! How much boost does it provide?

  • stepho

Posted October 10, 2007 - 01:57 PM

#26

Never had a cooling problem power stays up all day. Tried an oil cooler on one of the first models and the oil was too cool. Maybe the oil squirter is the key. It is a canyon cutter you can buy one for 36,000. Low CG and aero makes this thing awesome. The braking is just stupid. The only problem is no wheelies. I bought a friends XRL 3 months ago so this winter my engine will be done.

  • martinfan30

Posted October 10, 2007 - 02:03 PM

#27

Never had a cooling problem power stays up all day. Tried an oil cooler on one of the first models and the oil was too cool. Maybe the oil squirter is the key. It is a canyon cutter you can buy one for 36,000. Low CG and aero makes this thing awesome. The braking is just stupid. The only problem is no wheelies. I bought a friends XRL 3 months ago so this winter my engine will be done.


who you work for? oil squirter at base of cylinder ?

  • stepho

Posted October 10, 2007 - 02:12 PM

#28

All American Racers

  • XR680RR

Posted October 10, 2007 - 02:13 PM

#29

Ive seen 67hp from a factory backed XR680 baja race bike,cant remember what magazine it was.


Remember, magazines and factory both use bhp (braking horsepower), this gives the true horsepower of the engine. The rest of us have to use a dyno (This is Rear Wheel Horsepower) and is 24% less then braking horsepower. This is true for both cars and bikes, give or take just a little.

58rwhp 680cc is 72bhp and that would be Borynack's bike.

HRC kit; would be about 52rwhp and that is right close to 64bhp and is what Honda claims the #1 team was running. Stock (uncorked) is 44rwhp and Honda claims 55bhp as you see in the adds and magazines.

So, if we are talking 70+rwhp noway but, 70bhp maybe for a little while, I would say getting 55rwhp out of a "L" is more then possible. but, you would need bigger fins and it would be always moving on a SM track. I don't think the crank will handle it for long. Stock setup is good for about 60bhp like the XR600R engine was. The XR650R engine is said, to be good for 75bhp before you are looking for trouble.

  • stepho

Posted October 10, 2007 - 06:28 PM

#30

I say 680 is pretty accurate with the alligator we are getting 63 rwhp while the engine dyno is in the high 70's. So there is a pretty large difference.

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  • BWB63

Posted October 10, 2007 - 07:09 PM

#31

I agree, I see this all the time. It is talked about on one of the page of my sight. CRF450R and XR650R both put out 55hp! Honda says so! Well that is 55bhp and both bikes do put out right at 44rwhp. Now torque is a whole different story. Honda's #1 team bike was engine dyno'd and the bhp was around 64bhp but, the bike will only give 52hp at the rear wheel. There are Dyno's out there that give a composated horsepower number and that makes it even more confusing. You can mess with the dampning and weighting, giving false numbers. Calibrated dyno's that are some what nuetral enviroment will be within one horsepower so, different dyno's should not give different number but, the operater can make the numbers be what ever you pay for them to be. The other side of the world can come up with real crazy numbers that are for sure not the same as ours. So, when threads like this start it depends on if it's about facts or fiction.

I know for sure you can get 50rwhp out of a XR650L. That would be about 62bhp. Not bad for an air cooled bike. I would want larger fins added like XR680RR said. 55rwhp would really be pushing it and I do not think the crank bearings could handle it.

  • stepho

Posted October 10, 2007 - 07:38 PM

#32

we did see issues with horizontal cracks in our cases running from the crank bearing to the countershaft bearing but we seemed to have cured that by installing a steel ring behind the crank bearing. now it can take a pretty heavy pounding:bonk:

  • Captain Midnight

Posted October 10, 2007 - 10:05 PM

#33

Turbo pics:
http://i125.photobuc...8036/Turbo2.jpg
http://i125.photobuc...8036/Turbo1.jpg
http://i125.photobuc...8036/Turbo4.jpg
http://i125.photobuc...8036/Turbo5.jpg
Fuel injection pics:
http://i125.photobuc...rottlebody3.jpg
http://i125.photobuc...hrottlebody.jpg
http://i125.photobuc...50injector1.jpg
Block temp sensor:
http://i125.photobuc.../Tempsensor.jpg

  • martinfan30

Posted October 11, 2007 - 11:31 AM

#34

very cool stuff! what did the turbo, throttle body come from?

and how did each perform?:confused:

  • crmc33

Posted October 12, 2007 - 03:14 AM

#35

55RWHP is what I have with my XRL based 675cc (previously 49RWHP before more cyl head work and HSR48 carb fitment so dyno is accurate).
I run a Aprilia RSV oil cooler on it and wouldnt like to try without it !...as the Ally beam frame I use still gets very very hot after a decent track session.

Im aiming for 60RWHP and dont see why its not possible with a few more tweaks, mainly in the igntion dept. Even with 55RWHP, lack torque isnt an issue.

I would guess at some point the gearbox will start to struggle with the power. I have a standard NX650 crank in mine with welded big end pin.

Does anyone have any experience of using Hotrod conrods?? I have one to try in my next development (600cc) engine and the small end eyer is notciebaly thinner than the OE Honda part, tho it is bronze bushed on the hotrod part.

  • HeadTrauma

Posted November 30, 2007 - 08:14 PM

#36

we did see issues with horizontal cracks in our cases running from the crank bearing to the countershaft bearing but we seemed to have cured that by installing a steel ring behind the crank bearing. now it can take a pretty heavy pounding:bonk:


Can you elaborate on that steel ring?

  • stepho

Posted November 30, 2007 - 08:51 PM

#37

let me take a picture at work tomorrow and i can explain it better.

  • stepho

Posted November 30, 2007 - 09:01 PM

#38

check out my garage for some dyno test for our xrl 706 RWHP have not set up photobucket yet click on xr 2007 these are 3 different cam set ups.

  • stepho

Posted November 30, 2007 - 09:57 PM

#39

Posted Image
here we go 707 RWHP dyno sheet three different cams and FI. at 8300rpm

  • dmvmechanics

Posted December 11, 2007 - 09:29 PM

#40

i certainly wouldn't mind that turbo set up on my R. anyone know where to get a turbo like that?





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