| Author |
Message |
|
|
|
|
Post subject: YPVS Dyno results
|
|
|
|
sprint Got the Powerband! Joined: 29 Oct 2004 Total posts: 9 Location: Plymouth |
This is from my dyno test run from today. Was hoping for a bit more but at least i know there`s plenty left to come.
All thats been done to the motor so far is the lomas pipes, removed the silencer in the airbox with drilled lid and squish at 1mm. Its got f2 carbs with std jetting.
Let me know what you guy`s think and where i should be looking to improve on next.
http://i145.photobucket.com/albums/r210/whitaker1579/005.jpg
|
|
|
|
Posted: Sat Jul 05, 2008 6:34 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
Trig One-handed Stoppie! Joined: 04 Aug 2003 Total posts: 2390 Location: On Cloud 9 |
Looks a bit low to me.
Mine with pipes, airbox silencer missing, squish at 2.3mm, std porting runs at 56.5 on Stinkwheels dyno
|
|
|
|
|
Posted: Sat Jul 05, 2008 7:51 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
gavin RD/RZ Jedi Master Joined: 03 Aug 2003 Total posts: 6208 Location: cheshunt, herts, uk |
thats about par. stock pipes are probably giving about 30bhp at 6k peaking at 35 @ just over 7. dont believe all the guff about 60bhp from the factory 
|
|
|
|
|
Posted: Sat Jul 05, 2008 7:53 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
jamietzr250r Daily Burner Joined: 01 Jan 2007 Total posts: 194 Location: gosport hampshire |
and there's me worrying that my tzr250r (3xv) is only knocking out 45hp.........
|
|
|
|
|
Posted: Sat Jul 05, 2008 8:00 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
gavinRD/RZ Jedi Master Joined: 03 Aug 2003 Total posts: 6208 Location: cheshunt, herts, uk |
look at where its going...... the ignition is killing it at 8.5k....if you imagine it following the curve its on before that it would be doing around 55 at 10k....get a zeeltronic on it
|
|
|
|
|
Posted: Sat Jul 05, 2008 8:04 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
| sprint Got the Powerband! Joined: 29 Oct 2004 Total posts: 9 Location: Plymouth |
Looking at the torque curve im wondering if i have pv opening issues.
http://i145.photobucket.com/albums/r210/whitaker1579/DSC01378.jpg
|
|
|
|
|
Posted: Sat Jul 05, 2008 8:26 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
| IanG1 Joined: 03 Aug 2003 Total posts: 1264 |
| gavin wrote: |
| look at where its going...... the ignition is killing it at 8.5k....if you imagine it following the curve its on before that it would be doing around 55 at 10k....get a zeeltronic on it |
What CDI are you running, a swap to a 29K 50 or a 52Y 50 could loosen up them top end ponies 
My tired LC2 on standard jets with a set of swarbicks and mild tuning (ahem) did 55 on stinkwheels dyno (using a 52y 50 cdi)
It's now on 220 mains, had new rings and feels better than ever, just waiting on a new set of needles to clean it up as the originals are fooked
|
|
|
|
|
Posted: Sat Jul 05, 2008 8:32 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
greengoatchokerDaily Burner Joined: 03 Sep 2007 Total posts: 147 |
i agree looks like the ignition is killing it up top . isn't the f2 renowned for that . cheaper solution to the zeetronic is to buy and earlier cdi , a f or n or even a pre power valve lc one will do .
|
|
|
|
|
Posted: Sat Jul 05, 2008 8:45 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
gavinRD/RZ Jedi Master Joined: 03 Aug 2003 Total posts: 6208 Location: cheshunt, herts, uk |
| sprint wrote: |
Looking at the torque curve im wondering if i have pv opening issues.
|
no thats just how the lomas' are, on stock timings at least. you might well fill that hole by playing with the PV timings....zeeltronic again.
interestingly, although the ignition on the f2 stops it at around 8.5k......the PV's arent fully open till 10k.....i made an argument quite some time ago now on here that the f2's ignition and PV timings were more to do with noise and emissions than performance, the zeeltronic kit gives you the opportunity to explore that avenue.
|
|
|
|
|
Posted: Sat Jul 05, 2008 9:07 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
| sprint Got the Powerband! Joined: 29 Oct 2004 Total posts: 9 Location: Plymouth |
It on a 52Y cdi I think as the sticker was missing when i got the bike (in lots of bits). The stator matches the 52Y cdi on Norbo`s site so i`m guessing thats what it is. It`s a 31k engine in a LC by the way.
Zeeltronic is on the wish list.
It feels ok when riding but as you can see hits a brick wall earlier than I`d like.
|
|
|
|
|
Posted: Sat Jul 05, 2008 9:17 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
Twosted Regular Racer Joined: 19 May 2004 Total posts: 254 Location: Leicestershire |
Looks like your fueling is allll wrong, too rich at the top and too lean though the mid range. 
LC's and valves run better with a standard air box. Yamaha didn't spend millions of Yen developing a bad airbox.
Drilling the lid and removing the inlet trumpet will lose all the air pressure through the carbs and upset the fueling.  
I would replace the standard airbox lid and inlet trumpet and go down two sizes of main jet and lift the needles a notch to richen the midrange.
...........But thats only my opinion.  I'm sure someone else will be along soon with their thoughts. 
Good luck. 
p.s. My N1 made 59 hp with a road tune and some fantastic pipes..........and a totally standard airbox and ignition. 
|
|
|
|
|
Posted: Sat Jul 05, 2008 9:57 pm
|
|
|
|
|
|
Post subject:
|
|
|
|
hybrid Rear-wheel Steering! Joined: 07 Aug 2003 Total posts: 2543 |
Don't worry about the number that the dyno reads.
Use it to measure your improvements and that's all.
You could very well put your bike on one of the other guys dynos and get 55hp too.
|
|
|
|
|
Posted: Sat Jul 05, 2008 11:52 pm
|
|
|
|
Options and Permissions
|
|
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
|
| Page 1 of 5 .:. Goto page 1, 2, 3, 4, 5 Next |
|
Powered by phpBB. copyright © 2002 phpBB Group. Template design - Vereor.
