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+--- Thread: Limiting fuel on Superpump? (/showthread.php?tid=6651)
Limiting fuel on Superpump? - Matej - 07-25-2015
Hello,
While this may go against the ideology of buying a Superpump and making as much power as possible, are there any methods of limiting fuel for safe power gains?
There are no good 6.5 or 7mm elements available, which makes the 7.5mm pump the next step up. But that is when drivetrain components start breaking, and I do not wish to deal with that yet.
What can be done to safely limit the fuel to approximately the equivalent of a 6.5-7mm element pump?
Thanks for any ideas.
RE: Limiting fuel on Superpump? - baldur - 07-25-2015
You do that by adjusting the governor, best done on a test bench. Whoever builds the pump for you should be able to set it up to deliver the amount of fuel you need for the power you want to produce, no more and no less.
If you need it field adjustable, on the M pump the shut off lever can be exploited to limit rack travel. This has been done by Dieselmeken and others for external ALDA implementation.
RE: Limiting fuel on Superpump? - Matej - 07-25-2015
(07-25-2015, 06:00 PM)baldur If you need it field adjustable, on the M pump the shut off lever can be exploited to limit rack travel.Interesting. Wonder if it would be possible to use some sort of a spacer on the shutoff valve to use it as a constant limiter. But does it not damage the pump to have the valve semi-engaged for prolonged periods of time?
I was hoping for a method that I could implement by myself at home. That way I could play around with different power levels or take full advantage of the big elements if I ever want to, without having to send the pump to someone each time for costly adjustments with long wait times.
But if that is not possible, I will have to live with it.
RE: Limiting fuel on Superpump? - barrote - 07-28-2015
hehe,
yes u can have baldur idea . but u have to remove the governor out to fit that limitation.
however a 110cc 7.5 mm pump wont break anything apart, barelly slip the stock clutch everynow and then and only if u have a pretty decente engine set up!!! things start to break after 120cc.
there´s another method to field limit the pump. for instantce u ask your elemento is«nstaller to limit rack travel by the outsider throtle stop. use diff diameter washers and record the output . so u can change the fueling by changing the washers......
one of a lot of ways , the most common is the foot....
RE: Limiting fuel on Superpump? - Hario' - 07-29-2015
That is what the ALDA end screw is for. To limit max fuel lever position, hence being called 'max fuel lever screw'.
RE: Limiting fuel on Superpump? - barrote - 07-29-2015
come on , i belive u are a bit offset here.
the screws in the alda is for calibration of the job the alda is suposed to do, increase fueling by 10cc or 8cc in a stock pump, shims can be added to move the alda rod to the right height. usually a stock alda is able to increase fuel by 25cc in a 7.5mm pump and 12/15cc in a 6mm.
the stop lever bolt is something u can remove or use a bigger head bolt , that will increase or decrease rack. at a certain point. and thats all u have in the outsider.
of course if u screw the alda screw all the way in , u actually are not cutting fuel but limiting the alda function to zero increase, but that will do no good in a 150cc pump for instance, maybe u cut it to 125cc.
using the throtle stop limit, u can have the alda full operation and the desired reduction by throtle limit. it wont prevent smoking but will restrict max fueling.
RE: Limiting fuel on Superpump? - Petar - 07-29-2015
External ALDA fitted to dieselmeken superpumps has that function. There is a screw for off boost fuel and a max fuel screw on it.
RE: Limiting fuel on Superpump? - whipplem104 - 07-29-2015
Just regulate boost pressure.
RE: Limiting fuel on Superpump? - Matej - 07-29-2015
The car will also be used at drift events, so I should have mentioned that I do not want to do anything that would limit throttle response or max rpm's.
Honestly, the main thing I am worried about is not the engine but breaking transmissions.
But I still have a while to decide which route to go with the build, so I will see where it takes me.
RE: Limiting fuel on Superpump? - NZScott - 07-31-2015
If you watch videos of dieselmeken has has some of adjusting the ALDA which has on and off boost fuel levels.
RE: Limiting fuel on Superpump? - m1tch - 08-01-2015
Could you perhaps use a manual boost controller bleed valve on the vac/boost line going to the MAP sensor? The MAP sensor would 'see' less boost and therefore fuel less.