Malpassi Fuel Reg Setup

[mantaboy89]

Has anyone fitted and set up a malpassi fuel pump on a gte? Need to fit one to mine but unsure of how to set it up,

[monzta]

Arent those low pressure pumps for cab setups ? I have used their filterking filter with very good results. Everyone here in historic racing uses them and they are top notch quality

[mantasrme]

It came off a manta GT/e that was running ok so i would just fit it and see how she goes.

The only way to get it setup properly is to get it tweeked on a rolling road where they can adjust it and check the fueling across the full rev range

[monzta]

That is never a issue on the GT/E manta´s as there´s a fuel regulator controlling the amount of pressure in the fuel line. Increasing the fuel pressure can easily be done by adjusting the regulator, but that wouldn´t have any effect as effect is a result of more air and fuel. Only adding more fuel will not make it run better, actually you will propably end up with a gas guzzling car with fewer hp

[mantaboy89]

Just going through it n seen I put fuel pump not regulator,my bad

[monzta]

Still if you put more fuel in you will need more air as well

[mantasrme]

Still if you put more fuel in you will need more air as well

Unless your mixture is weak, then a bit more fuel will help.

But unless you have a lambda sensor and gauge fitted to your car then a rolling road setup is your best place to find out.

[monzta]

Unless your mixture is weak, then a bit more fuel will help.

But unless you have a lambda sensor and gauge fitted to your car then a rolling road setup is your best place to find out.

You are absolutely right but your´e down into real small details, where some really good ignition wires also can bring 1-2 hp to the game, some really good plugs, high voltage coil, new jets etc.

Think of it this way. Your´e injectors are propably 25-30 something years old the odds that you can get more out of new injectors are propably better than fiddling with the fuel regulator. So you are really messing around with low priority details here.. Also getting the CO measured from the exhaust at any garage should be suffecient to get a good reading wether or not its running lean or rich.

As said normally you really don´t need to do anything with it.. And the money spent on a new regulator could be spent elsewhere.. You could buy a megasquirt system for it instead that is fully programmable. Those old analog injection systems really only now one way to work..

Your´e choice sure, but i would really consider doing something else with it

Edited November 5, 2011 by monzta