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Force-V4 Forum Index » RC45 Discussion » Yoshi system + power commander = 121hp and 56.5 ft.lbs

 
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hollo



Joined: 01 Nov 2009
Posts: 17
Location: Berkshire , UK

  

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PostPosted: Sat Nov 25, 2017 5:15 pm    Post subject: Yoshi system + power commander = 121hp and 56.5 ft.lbs  


Hello , I've not had my RC45 too long and I've never heard of anyone having a power commander fitted. So here are my findings......
When I went to the bike/dyno shop to get the idle balanced when I first got the bike in August , the owner thought that it would not be too hard to fit a power commander .
As ever I seem to spend all my money on a new bike , and then even more once I've got it . So after seeing a full Yoshi twin stack system on E-bay , I thought I've get it and try it with a power commander.
I asked the dyno shop to dyno it in stages , so,
1 / With an end can and std system - 113.7hp and running lean at the bottom end , but getting better with more revs.
2 /With a full Yoshi twin stack system , 114.1hp, but running very lean throughout the rev range, so yes it flows better than the std system , but the bike cannot get enough fuel to burn to make any more power
3 / Also with a Power commander III fitted and tweeked , now it can be altered to burn more fuel , it gave 121.2hp and 56.5ft.lbs of torque . From the dyno graph , it just gives a clear 6 or 7hp more power all the way from 6000 rpm and above , so you don't loose any of the wonderful V4 seemless torque feel of the bike.

I'm now a very happy bunny , but I've only ridden it once since I've got it back , as the weather has turned too cold , and as soon as any salt it put on the roads I always then call it quits for the year . From my brief ride , all I can say is WOW. I don't think this has been done before , as the power commander ahs been hard wired in, so not plugged in , so it's a semi permanent mod , but obviously could be reversed but not a easy a unplugging it . Personally I'm more than happy to do this , and I'm very happy with the results.
Mike .
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Busy Little Shop
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Joined: 26 Nov 2009
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Location: California USA

  

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PostPosted: Sat Nov 25, 2017 11:08 pm    Post subject:  


Congratulations Mike... you succeeded where all of us have failed at self
mapping...

I failed to persuade Power Commander to cut and splice a PC 3 into a
existing RC45 harness even though they are headquarters in my home
state of California (OK I begged) Undaunted I dug into the possibilities... I
ordered a VFR800 PC 3 and Ebayed a VFR800 separate plug in fuel
injection wiring harness... this Honda VFR feature allows plug and
play whereas the RC45's injectors are hard wired into a difficult to
access all in one main harness... without easy plug and play the only
path for success was cutting and splicing but enthusiasm dropped
because cutting and splicing is not popular with owners... Then I met
Ammar Bazzaz at MotoGp round at Laguna Seca... he agreed to help with
self mapping our prized RC45s if only 25 firm pledges signed up... For
$380 a Z-Fi plug and play unit would piggy-back onto the stock ECU.
Each unit comes with a specific harness for each bike that utilizes
OEM connectors for simple installation... However only 7 pledged...

1)Busy Little Shop
2)neilzakleigh
3)Jamiec_c
4)Pask
5)G_M_Cronin
6)Loyd (Yahoo RC45)
7)JC120

Thread http://force-v4.co.uk/forum/viewtopic.php?t=427


I would love too see your Dyno chart because what is important is not
so much the high number but rate of increase mapping promises...
all Dynos give con flicking numbers depending on a host of variables
but a clear sign at the rate of increase gives us hope... like my RC45
showed 112RWHP 52.9 ft pds on a Power Commander Dyno would I see a
7hp increase to 119 RWHP??? tantalizing to say the least...

I would also love to see a wiring diagram on the work done for possible
replication if owners were so inclined to follow your lead...

Update Nov29... My RC45 actually showed 112RWHP 52.9 Torque with stock pipes but with a straight through end can and home made K&N filter...


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Larry L
94 RC45 #2 / RC30 #44
https://www.youtube.com/user/BusyLittleShop/feed
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Last edited by Busy Little Shop on Thu Nov 30, 2017 5:53 am; edited 3 times in total
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hollo



Joined: 01 Nov 2009
Posts: 17
Location: Berkshire , UK

  

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PostPosted: Sun Nov 26, 2017 12:12 am    Post subject:  


Hello Larry , if you send me your mail address I can mail you a print out of the dyno graph I've got . I do not know how the power commander was wired in , but it was done by Dave Wood at a company called Dave Wood Racing in Aylesbury here in the UK . He is a very decent honest person to deal with , I'm sure he'll be able to help you out if you want more details of how he wired it in, and got it to work.

Mike .
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JC120
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PostPosted: Sun Nov 26, 2017 1:00 am    Post subject:  


Nice to hear you made some gains. I’d gladly hack into my harness for 121rwhp..
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MarkJHarris
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PostPosted: Sun Nov 26, 2017 5:31 pm    Post subject:  


I looked into this years ago too. The Plugs that go onto the ECU are the same as the CDI plugs on mid '90s Hondas, but there was never the other half to this plug made and none of them were ever available to buy.

The closest I thought was to try to get a plug with 8 connectors that utilised the same inner brass connector type and open up (the easy bit) the O.E. plugs to fit new wires and therefore make a breakout point to wire a PC3 onto.

Mine ran terribly rich at the top end with O.E. pipe and end can, and would probably be a lot better with just a can fitted.

Now it's in the Museum, I'm not in too much of a hurry to carry it through but never say never.....
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MarkJHarris
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PostPosted: Sun Nov 26, 2017 5:33 pm    Post subject:  


As to how it works, it's easy. YOU need the single live feed to the injectors, and the four earth wires, plus the throttle position signal and RPM.

The PC3 has wires to take all of these signals in and out. It's powered by the live feed to the injectors and works by retiming the earth connection from it's map of throttle and rpm.

Best of luck.
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Dave45
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PostPosted: Sun Nov 26, 2017 6:16 pm    Post subject:  


I found myself a little frustrated with my first stock 45 regarding the limits on it’s tuning options. A kitted bike was the only way forward for me, more power less weight. 👍
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StephenRC45
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PostPosted: Sun Nov 26, 2017 10:54 pm    Post subject:  


We never found the need to adjust the stock PGM on a road engine, with a full system, modified air box and bell mouth we used to see 124-128hp on the stock PGM. If you wanted to run the pressurized air box we used to relocate the atmo sensor but that was all.

The adjustable HRC PGM was pretty good but had to be used on the race kit bikes because of the increased fuel rail pressure and the reduced inlet manifold pressure caused by the kit cams.
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