NSR250.net Forums Logo: Honda NSR 250 Forums, Classifieds and Service Manual in English. Covering All Honda NSR 250 MC16, MC18, MC21 and MC28 models
NSR250.net Forums

#
 
#
 
Performance Engineering

  • NSR250 Forums Index ‹ NSR250R Discussion
  • Members Content
  • Members Garage
  • Subscription
  • Transactions
  • FAQ
  • Search
  • Register
  • Log in

Dyno results!!


Reply to topic   printer-friendly view
Page 1 of 1   Download Topic





invigiator

 
Posts: 295
Joined: 25 Aug 2004

Location: Tokyo, Japan
    Send private message View user's profile
    Reply with quote  

Dyno results!!

Sat May 21, 2005 5:38 am » Post: #1 » Download Post

So what do all you experts and and clueless individuals (like myself) recommend? I am interested in two aspects:

POWER
I want to keep the oil injector, don't want to change the carb.s except for slow and main jets, want an airbox. I am after reliability and not having to rejet much, but it would be nice to get a little more power. 59-60RWHP would be just about right, and it should be achievable within the constraints of reliability I stated above.

JETTING
I dynoed at two main jet settings, 155 and 160. I rode it at 165 (and seized it at 145) and I think it didn't feel so good. So is it likely that the 160 main jet is going to be safe on the long back straight at Motegi? Also what kind of temperature swing is it going to take before I need to rejet?


SETUP:
MC21
HRC black box PGM deriestrictor
Dry air filter (Daytona)
Tyga high-flo reed set
Carbs stock with 40 SJ and 160 MJs
The bottles under the carbs have been romved and holes blocked off
JHA chambers and endcans; it all looks pretty old, and there is a dent in one chamber at the widest point, and the other one has a slight bend at the narrowest point where it is reinforced and goes from wide to narrow. Endcans look old-ish.
Airbox has had the back chopped off it and the divider inside removed
The front cylinder has the HRC head conversion with 0.6mm gasket
The front cylinder has had the outside of the exhaust ports widened.
Rear cylinder is an A, front is a B, both have new pistons and rings.
Oil injector is adjusted to maximum.

http://invigiator.com/crap/dyno_155_160.jpg

http://invigiator.com/crap/dyno_155.gif

http://invigiator.com/crap/dyno_160.gif

Image properties edited by Admin
_________________
MC28 SE -sold-
MC21 with RS250 engine -for sale-
MC21 race bike -soon for sale-



Last edited by invigiator on Sat May 21, 2005 7:49 am; edited 3 times in total
Back to top


nsrmonkey

 
Posts: 1832
Joined: 17 Feb 2004

Location: nottingham uk
1991 Honda nsr 250 mc21 sp
    Send private message View user's profile
    Reply with quote  

Sat May 21, 2005 7:22 am » Post: #2 » Download Post

nice......can you not reduce the size of the pics Question Question Question
_________________
MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold
Back to top


Binka

 
Posts: 339
Joined: 03 Dec 2004

Location: Devon - SW
    Send private message View user's profile
    Reply with quote  

Sat May 21, 2005 5:41 pm » Post: #3 » Download Post

Power, power !
We need more power......

http://www.cs.swarthmore.edu/~rider/glab4/orbit.gif
_________________
These aren't the droids you're looking for.
Back to top


invigiator

 
Posts: 295
Joined: 25 Aug 2004

Location: Tokyo, Japan
    Send private message View user's profile
    Reply with quote  

Sun May 22, 2005 12:42 am » Post: #4 » Download Post

Thanks for all the input from the image police, it really helped me understand my dyno results, and now I can view the post on my pocket calculator without hitting the scroll button Rolling Eyes
_________________
MC28 SE -sold-
MC21 with RS250 engine -for sale-
MC21 race bike -soon for sale-

Back to top


Andy
Site Admin
 
Posts: 11950
Joined: 19 Jan 2004

Location: Devon, UK
1991 Honda NSR250 MC21
    Send private message View user's profile
    Reply with quote  

Sun May 22, 2005 1:35 am » Post: #5 » Download Post

Sorry invigiator, but your post in its' original form was over 1/2Mb to download. Please bear in mind that the majority of the planet still use dial-up modems to access the internet so therefore could've spent ages waiting for the images to download.

If you notice, on many an occasion I will actually delete the original images in posts, upload optimised versions, then add thumbnails and/or links for those who wish to download the full-size image. Sometimes I don't however, as believe it or not I do have a life outside NSR-WORLD.COM!

Rather than make up a "rule" about posting images, I have instead mentioned this several times, hoping that it doesn't fall on deaf ears.

Anyone wishing to analyze your dyno results are quite capable to do so by clicking on the links.

Remember it's a Saturday, so the forum is always less active at this time of the week. Many owners with the technical ability to analyze the graphs are probably racing, watching racing, or simply out enjoying themselves. I doubt removing the images and leaving links is the reason you have yet to see a reply.

I think the Forum Members are sometimes their own worst enemies. Technical posts are often answered within an hour or two, usually by more than one knowledgable contributee, and consequently it becomes expected to receive an answer to all posts virtually instantly!

Regards,
_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.


Check us out on Facebook! Please "like" our page!
Back to top


invigiator

 
Posts: 295
Joined: 25 Aug 2004

Location: Tokyo, Japan
    Send private message View user's profile
    Reply with quote  

Sun May 22, 2005 4:34 am » Post: #6 » Download Post

Hey! Sorry Andy, didn't mean to get your back up about it and certainly didn't mean to make such a big deal out of it with my little jibe; didn't realise the bandwidth was the problem not the physical size.

Anyway I don't expect you or anybody else to waste your time moderating and editing pictures, and I certainly don't expect a 'service' from random members of the board with regard to technical questions. Over any time scale.

So please accept my apology for offending you, monkey, and anybody else with my picture-posting. After I was asked the first time I went to the effort of re-sizing them all smaller, and putting links to the full-size ones, but clearly it wasn't enough.
_________________
MC28 SE -sold-
MC21 with RS250 engine -for sale-
MC21 race bike -soon for sale-

Back to top


Andy
Site Admin
 
Posts: 11950
Joined: 19 Jan 2004

Location: Devon, UK
1991 Honda NSR250 MC21
    Send private message View user's profile
    Reply with quote  

Sun May 22, 2005 12:10 pm » Post: #7 » Download Post

No apologies please... you'll just have to accept that I'm a grumpy bugger sometimes! I do like to keep the pages fast-loading though, for reasons I mentioned earlier.

Let's try again shall we? Smile







Click on the images for a larger view.

(Obviously I don't have a life outside NSR-WORLD.COM!!) Wink
_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.


Check us out on Facebook! Please "like" our page!
Back to top


invigiator

 
Posts: 295
Joined: 25 Aug 2004

Location: Tokyo, Japan
    Send private message View user's profile
    Reply with quote  

Sun May 22, 2005 1:17 pm » Post: #8 » Download Post

Oh! NOW I feel guilty!! Sad


Thanks Andy, appreciate the help. Very Happy
_________________
MC28 SE -sold-
MC21 with RS250 engine -for sale-
MC21 race bike -soon for sale-

Back to top


nsrmonkey

 
Posts: 1832
Joined: 17 Feb 2004

Location: nottingham uk
1991 Honda nsr 250 mc21 sp
    Send private message View user's profile
    Reply with quote  

Sun May 22, 2005 1:30 pm » Post: #9 » Download Post

invigiator wrote:
So please accept my apology for offending you, monkey, .


none was taken at all Smile .
like andy said it paupers like me only have dial up Very Happy
_________________
MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold
Back to top


Reply to topic   printer-friendly view
Page 1 of 1   Download Topic

NSR250R Discussion

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

  • NSR250 Forums Index
  • All times are GMT
Powered by phpBB © 2001, 2005 phpBB Group


Hosted by NSR250dotNET © 2008 NSR250dotNET