Looking for a carburettor accelerator pump or something like
Discussion
I'm looking for a carburettor accelerator pump thats not attached to the carburettor, or can be cut off.
Or something I can turn into one that won't melt in petrol.
I want to play around with a pump and jets in my old fords carburettor, see if i can improve it a little. But I really want to keep it in date (ish) so that means modifying my current WWI aeroplane carburettor and not sticking on a webber.
Anyone have any ideas?
Or something I can turn into one that won't melt in petrol.
I want to play around with a pump and jets in my old fords carburettor, see if i can improve it a little. But I really want to keep it in date (ish) so that means modifying my current WWI aeroplane carburettor and not sticking on a webber.
Anyone have any ideas?
Aircraft engines do not need accelerator pumps as the mixture is able to be altered(optimised) to allow for the effects of altitude .
If the throttle setting is altered it is SOP to change the mixture to the optimum,this is determined by the EGT gauge.
Throttle settings are effectively a series of fixed speeds,and are not changed very often in normal flight, unlike those of a car.
If the throttle setting is altered it is SOP to change the mixture to the optimum,this is determined by the EGT gauge.
Throttle settings are effectively a series of fixed speeds,and are not changed very often in normal flight, unlike those of a car.
Edited by Auntieroll on Saturday 16th January 18:38
Aircraft engines do not need accelerator pumps as the mixture is able to be altered(optimised) to allow for the effects of altitude .
If the throttle setting is altered it is SOP to change the mixture to the optimum,this is determined by the EGT gauge.
Throttle settings are effectively a series of fixed speeds,and are not changed very often in normal flight, unlike those of a car.
If the throttle setting is altered it is SOP to change the mixture to the optimum,this is determined by the EGT gauge.
Throttle settings are effectively a series of fixed speeds,and are not changed very often in normal flight, unlike those of a car.
Edited by Auntieroll on Saturday 16th January 18:39
Boosted LS1 said:
Holley carbs have a plastic cam that activates the accellerator pumps. You can buy different cam profiles as well as different pump nozzles. You could also remove the cam or blank the nozzles. Most carbs are 4 barrel but 2 barrel are available. It could look 'the part'?
Actual pump mech is still integral to the carb thoughWithout knowing what the OP is actually using/doing etc...it's a difficult/strange one to help with.
stevieturbo said:
Actual pump mech is still integral to the carb though
Without knowing what the OP is actually using/doing etc...it's a difficult/strange one to help with.
I sort of know what you mean in that it's 'a part of the carb' but being external it's easy to disconnect. Agreed about the OP's post though so it may not be suitable.Without knowing what the OP is actually using/doing etc...it's a difficult/strange one to help with.
I'd suggest trying to find a small lever type fuel pump, like this:
As it's designed for fuel, has the necessary one way valves etc.
You'll have to experiment with the lever actuation ratio, from a cam on the throttle shaft in order to deliver a suitable quantity of fuel to a suitable nozzle.
As it's designed for fuel, has the necessary one way valves etc.
You'll have to experiment with the lever actuation ratio, from a cam on the throttle shaft in order to deliver a suitable quantity of fuel to a suitable nozzle.
Max_Torque said:
I'd suggest trying to find a small lever type fuel pump, like this:
As it's designed for fuel, has the necessary one way valves etc.
You'll have to experiment with the lever actuation ratio, from a cam on the throttle shaft in order to deliver a suitable quantity of fuel to a suitable nozzle.
That would be perfect! As it's designed for fuel, has the necessary one way valves etc.
You'll have to experiment with the lever actuation ratio, from a cam on the throttle shaft in order to deliver a suitable quantity of fuel to a suitable nozzle.
What is it?
kev b said:
I might be way off course but could you adapt a girling brake or clutch master cylinder as fitted to minis and other classics?
What cc and horsepower is your engine? Some aero engined cars I have seen could use a watering can as an accelerator pump!
Its going to be too big for me, its only a 3.2 four pot. What cc and horsepower is your engine? Some aero engined cars I have seen could use a watering can as an accelerator pump!
Major Fallout said:
Max_Torque said:
I'd suggest trying to find a small lever type fuel pump, like this:
As it's designed for fuel, has the necessary one way valves etc.
You'll have to experiment with the lever actuation ratio, from a cam on the throttle shaft in order to deliver a suitable quantity of fuel to a suitable nozzle.
That would be perfect! As it's designed for fuel, has the necessary one way valves etc.
You'll have to experiment with the lever actuation ratio, from a cam on the throttle shaft in order to deliver a suitable quantity of fuel to a suitable nozzle.
What is it?
Back in the day, when cars used mechanical fuel lift pumps to fill up the float bowls on their carbs, these fuel pumps sat, bolted to the side of the block or head, and a crank or cam driven excentric shaft pushed the lever down to pump fuel from the tank into the carb.
googling "mechanical" or "lever" fuel pumpp should get you loads of links
You may need to fit a weaker spring to a mechanical fuel pump if you are going to operate it via a throttle linkage, I suspect it could be too strong otherwise. Also note that its the spring that does the pumping, i.e. pushing the lever down against the spring draws fuel into the diaphragm and the spring pushes the fuel out when you release the lever, so the spring controls the maximum pressure available.
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