hi guys. i've been looking for suitable fuel pumps. the one i'd hoped would work ended up drawing 4 amps at 43 psi ! the ltr 450 pumps don't seem to pop up much. does anyone know how much a cbr600 pump will draw ? they're cheap on ebay.
Fuel Injection questions, ask away.
Started by
Captain Midnight
, Dec 17 2009 05:21 PM
248 replies to this topic
Posted 18 July 2012 - 05:05 AM
Contact the seller and see if you can get one to OHM the pump wires, then you can figure it out with ohm's law.
Posted 19 July 2012 - 03:32 PM
i emailed the seller and he said 2.7 ohms. which works out to be 4.4 amps at 12v. just for shits and giggles, i whacked my multimeter on the pump which drew 4 amps and it has 1.2 ohms. which works out to a potential of 10 amps at 12v. the cbr one is cheap enough. i'll buy one of them i reckon. will let you know how the current draw tests go when it comes.
Posted 20 July 2012 - 04:47 AM
&%$#@! would you bother fuel injecting a xr650l???
do you like fuel in your oil?
or is a carby just too reliable?
do you like fuel in your oil?
or is a carby just too reliable?
Posted 21 July 2012 - 03:29 PM
EFI fuel pumps can be a problem.
I made an electronic fuel pump controller for my EFI conversion.
It draws about 2.5 Amps and doesn't require a return line.
I made an electronic fuel pump controller for my EFI conversion.
It draws about 2.5 Amps and doesn't require a return line.
Posted 03 August 2012 - 05:56 PM
so i tested the cbr one with the exact same setup as the last one and it draws 4 amps too. dammit !
Posted 07 September 2012 - 05:00 PM
wiggywildwildwest, on 03 August 2012 - 05:56 PM, said:
so i tested the cbr one with the exact same setup as the last one and it draws 4 amps too. dammit !
EFI fuel pumps can be a problem.
I made an electronic fuel pump controller for my EFI conversion.
It draws about 2.5 Amps and doesn't require a return line.
Posted 24 September 2012 - 06:50 PM
I have a 1960's era John Deere 3020 gasoline tractor. It has the POS updraft carb. I want to fuel inject it. Where can I get the parts and do you think this is possible.
thanks
thanks
Posted 25 September 2012 - 10:17 AM
Yes, no problem. Go to the Megasquirt site. Everything you need is there. Any questions you can ask here.
Posted 25 September 2012 - 10:28 AM
Captain Midnight, on 25 September 2012 - 10:17 AM, said:
Yes, no problem. Go to the Megasquirt site. Everything you need is there. Any questions you can ask here.
Posted 07 January 2013 - 02:05 AM
Hi new to Tt but I have seen some of the FI builds here and have a project going myself and need some fresh input:( the bike is a wr426 supermoto efi/turbo conversion its running a microtech lt4 ecu to handle fueling and a vortex cdi and a reworked stater for more batery power the problem is geting a good TACK SIGNAL. Atm I am useing a hall sencer running off a pickup on the fywheel but it not perfect its geting electrical noise or something and reading twice the rpm,s sometimes more makeing it inposerble to set my fuel maps corect it runs but not well any advice would be much aprecated.
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Posted 07 January 2013 - 05:35 AM
Azwood80, on 07 January 2013 - 02:05 AM, said:
Hi new to Tt but I have seen some of the FI builds here and have a project going myself and need some fresh input:( the bike is a wr426 supermoto efi/turbo conversion its running a microtech lt4 ecu to handle fueling and a vortex cdi and a reworked stater for more batery power the problem is geting a good TACK SIGNAL. Atm I am useing a hall sencer running off a pickup on the fywheel but it not perfect its geting electrical noise or something and reading twice the rpm,s sometimes more makeing it inposerble to set my fuel maps corect it runs but not well any advice would be much aprecated.
As for RF noise in the signal causing erratic reading , make sure you use a resistor type plug or resistive suppressor type plug cap. I've had this in the past whilst turboing a mini with megajolt ignition, the RPM reading jumped all over the place because I was using a non resistor type plug, and this was sending RF noise into the cars 12v supply. Tricky to find out why because Rf doesnt show up on your normal oscilloscope, but the ECU will see it as a pulse to trigger from.
Hope this helps, let me know how you get on!
Posted 07 January 2013 - 09:35 AM
Another source of RF that will upset tach signals is a poor voltage regulation in the DC power. The DC regulator needs voltage filtering and a good battery of adequate size will suffice, or a capacitor of at least 2400 uf. A bad ground in the system can also cause problems, all equipment grounds should join together at a common point. On one bike I had to add a grounding wire from the engine cylinder head to the common ground point on the frame to stop erratic tach readings.
Posted 07 January 2013 - 11:39 AM
Non-resistor spark plugs are another source of RFI. Depending on the location and nature of the ECU, RFI from a spark plug can cause all kinds of problems.
Posted 07 January 2013 - 11:44 AM
Thanks for the help I will go and check over my wireing tonight and see what I find the earth point makes sence. I also thort I may be the fact that the flywheel rotateions on a single are so uneven at idal that it is fooling the ecu that may explane the rpm going up and down like crazy.
Posted 07 January 2013 - 02:31 PM
The crank trigger is just a flat plate bolted to the flywheel with a single pick up and a hall sencer and a pull up resister so it just gets one pulse per turn I have thort of puting it on the inlet cam
Posted 07 January 2013 - 10:32 PM
naw the hall sencer isent working at all it may have died.i will get a new one what do you guys think is the best hall style sencer to use it would be nice to just trigger off a lug on the flywheel like the cdi does what do you guys think
Edited by Azwood80, 08 January 2013 - 12:06 AM.
