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Author Topic: Fuel injection conversion (edit) fixed a few things  (Read 84485 times)

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Offline 750essess

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Fuel injection conversion (edit) fixed a few things
« on: February 07, 2008, 08:45:08 am »
I have some photos of the fuel injection conversion progress on my web site orleanscycle.com. Click on projects , then  fuel injection conversion, if your interested. I am considering offering the manifolds to adapt cbr600f4i throttle bodies for sale, it allows you to mount the bodies with no modification except for a throttle cable bracket to a cb750. Please email me if your interested in a set and i'll see if it is worth while. (edit) not offering for sale anymore)
« Last Edit: October 01, 2009, 07:02:58 am by 750essess »
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fuzzybutt

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Re: Fuel injection conversion
« Reply #1 on: February 07, 2008, 09:33:25 am »
looking great so far. any idea what kind of controller you'll use? and i wondered, will the charging system be strong enough for the fuel pump and extra electronics? i'd buy the system in a heartbeat if everything played well together.

Offline UnCrash

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Re: Fuel injection conversion
« Reply #2 on: February 07, 2008, 09:44:02 am »
Funny,

I have the same exact dent in my tank!

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Offline 750essess

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Re: Fuel injection conversion
« Reply #3 on: February 07, 2008, 10:25:29 am »
Fuzy Butt, I am worried too about the charging..its close. I have a permanent magnet rotor and stator coming off a vfr800, maybe I'll get lucky and it will fit. I'm running a microsquirt engine controller, haven't got the ignition to work with it yet though. Uncrash, I have three tanks and they were all dented there also  :D
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Offline KB02

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Re: Fuel injection conversion
« Reply #4 on: February 08, 2008, 04:58:43 am »
For the lazy ones, here's the l;ink:

Fuel Injection Conversion.

Project's looking good so far man.
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Offline 750essess

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Re: Fuel injection conversion
« Reply #5 on: February 08, 2008, 05:13:38 am »
thanks for the link and the compliment :)
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Offline 750essess

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Re: Fuel injection conversion
« Reply #6 on: March 10, 2008, 10:48:06 am »
Added a few more pics of the manifolds to the web site. Got the ignition sorted and tried to fire it up. It sputtered a few times and proceeded to pour fuel on my shoes  :D The throttle body assembly I got cheap from Ebay has a leaky regulator. Got a new one on the way,
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fuzzybutt

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Re: Fuel injection conversion (updated)
« Reply #7 on: March 10, 2008, 12:33:00 pm »
looking great so far

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Re: Fuel injection conversion (updated)
« Reply #8 on: March 11, 2008, 09:21:39 am »
Nice project. Keep us up to date please. Would you anticipate those squirters to be able to handle a mild to very large increase in displacement? ie 836, 900 up to 1080.

I did notice green coils and a Dyna sticker. Have you checked your system's voltage at the different rpm levels with those 3ohm coils without the additional draw? I'm running the same coils. No problem on the road but if I do some serious city stoplight on every other corner with heavy traffic kinda riding the battery is kinda taxed. I have yet to see 14.5V with the coils. 13.5 or so on a good day at rpms. If you find it to be a problem especially with a higher load due to your new stuff perhaps a headlight switch might be a solution on those occasions when the battery starts draining.
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline 750essess

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Re: Fuel injection conversion (updated)
« Reply #9 on: March 11, 2008, 09:41:59 am »
They should be able to handle a 1080 no problem. I am at 836 now. I had no problems with the voltage with the 3 0hm coils before the fuel injection. There is a volt meter on the bike and I would monitor it while riding,I was getting 13.5V too. That seemed ok to me until I put in the halogen headlight.  I doubt if you would ever get 14.5V. I realized I had it wired so the low beam was on all the time and high was switched in, so both where on at the same time. This was too much for the charging system (went to 12v). Have it set up now that its all off until I switch to high beam, then just high beam comes on. I got a few permanent magnet flywheels in, haven't found one that directly fits the crank yet. Got a magna one that is the right taper but it is flipped over the other way. The coils are under the flywheel next to case not in the cover. If anyone knows of a permant mag flywheel that has the same taper as a cb750 besides the weak cb350 one, please let me know. Also any ideas of a slick way to adapt one of a different bore or taper would be great too.
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Offline maksuttt

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Re: Fuel injection conversion (updated)
« Reply #10 on: March 11, 2008, 10:03:48 am »
Nice project 8)
I have a question about molding rubber manifolds. Do you have any information for reference (materials, processes, sources were to buy, etc.)? I will need to make molded rubber parts for my Kawasaki A7 restoration. Thanks for any info!
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Offline 750essess

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Re: Fuel injection conversion (updated)
« Reply #11 on: March 11, 2008, 10:46:41 am »
I used vi-sil v-105 to make the molds. Info here => http://www.sunbeltmaterials.com/condensation.htm
and devcon flexane 94 to make the manifolds available here => http://www.applied.com/
I must warn you I'm not sure how well the devcon will hold up, but it was the only thing I could find that was close to what I needed. The only thing worrying me is its resistance to gasoline. The spec sheet says its not very...will have to do some tests. It isn't immediately affected by gas, but don't know about long term.
here is the completed set
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Offline maksuttt

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Re: Fuel injection conversion (updated)
« Reply #12 on: March 12, 2008, 04:10:45 am »
Thanks for the info!  I will check those websites! Thanks again!
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Offline 750essess

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Re: Fuel injection conversion (updated)
« Reply #13 on: March 13, 2008, 05:27:53 am »
Put a piece of the devcon in a cup of gas, was ok the whole day. When I checked it this morning it was swelled a little. It didnt beak down or anything. I think it will work ok. Also this is available in 2 hardnesses, flexane 80 (softer) flexane 94 (harder). I made a set in each. At first the 80 looked too soft and the 94 was perfect. After about a week though the 80 is about right and the 94 is a little firm. Both work but the 80 is closer to the stock pieces.
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Offline andy750

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Re: Fuel injection conversion (updated)
« Reply #14 on: March 13, 2008, 06:58:26 am »
Wow great project! Im really interested in knowing how this thing runs and performs with the fuel injection setup. Very original and good luck with it!

cheers
Andy

Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico (CB750K4), 2003 - European Tour (CB750K4), 2004 - SOHC Easy Rider Trip (CB750K4), 2008 - Adirondack Tour 2-up (CB750K4) , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild.
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. VStrom DL1000 2003
4. XLR650L 2006

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Re: Fuel injection conversion (updated)
« Reply #15 on: March 13, 2008, 07:44:23 am »
Not trying to be smarter, but... for the ones who doesn't have patience and resources with rubber manifolds, I had great results making them from the car hot water pipes from the cooling system. they come in all kinds of shapes, and you can even find ones with a bend, close to the one you need. They don't cost much, and rubber will withstand the fuel. Just be sure you are dealing with the ply-reinforced hot water ones. plain rubber ones aren't strong enough to withstand sucking power of the carb - guess how do i know that?  ::)

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Offline 750essess

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Re: Fuel injection conversion (updated)
« Reply #16 on: March 13, 2008, 08:13:01 am »
You are correct about radiator hose, if you slice a honda manifold in half it is fiber re-inforced just like a rad hose. I couldn't use them because of the odd shape that is required to mate to the throttle bodies. The flange is offset to one side to alloe for the fuel injector to have a straighter shot down the port...hence why i made some. Wish I could have found something off the shelf to use, was a lot of work to make 'em.
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Offline 750essess

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Re: Fuel injection conversion (updated)
« Reply #17 on: March 13, 2008, 08:15:01 am »
Wow great project! Im really interested in knowing how this thing runs and performs with the fuel injection setup. Very original and good luck with it!

cheers
Andy


I am too LOL. I really would just be happy if it runs the same, but I dont have to mess with carbs all the time. While I looking around for info found this site http://www.cb1100f.net/modules.php?name=Forums a couple guys there have converted to efi. Tried to find a link but they changed their site around and can't search without being a member now.
« Last Edit: March 13, 2008, 08:27:20 am by 750essess »
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Offline James

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Offline 750essess

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Re: Fuel injection conversion (updated)
« Reply #19 on: March 13, 2008, 10:59:08 am »
Yeah thats one of them, there where a couple threads.
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Offline 750essess

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Re: Fuel injection conversion (updated)
« Reply #20 on: March 19, 2008, 05:34:54 am »
Installed the new regulator yesterday, leak is fixed. Couldnt get it to keep running on speed density, for some reason the map sensor isnt working, need to look into that. Switched to alpha- n setup, and it started right up and idled. A/f ratio was at 12.7:1 . Turned on the automatic mixture correction and within a few seconds idle came up and leaned out to 13.5:1 just like it was supposed too!!!  ;D ;D ;D
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Offline Soos

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Re: Fuel injection conversion (updated)
« Reply #21 on: March 19, 2008, 08:21:01 am »
AWESOME!!!


Whats the riding performance like??

Gas milage?
Yeah... takes time to find out, but VERY curious!!!

How much would you charge for a set of those adapters?


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Offline 750essess

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Re: Fuel injection conversion (updated)
« Reply #22 on: March 19, 2008, 09:14:02 am »
I've got more work to do before it can be ridden. Right now it idles and revs up too about 5000 rpms. There are alot of parameters to set still. The tank isnt completed for it yet either. I want to do some more testing on the adapters before I sell any. Need to know how they hold up long term. Would probably be around $100 though when I'm ready.
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Offline .RJ

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Re: Fuel injection conversion (updated)
« Reply #23 on: March 19, 2008, 09:49:57 am »
Are you using the stock ECU or something like megasquirt?  It looks like this is on a 750 - am i right?

Offline 750essess

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Re: Fuel injection conversion (updated)
« Reply #24 on: March 19, 2008, 10:48:33 am »
Its running on a microsquirt ( pretty much same as megasquirt but smaller ) and yes 750.
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