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injection pumps
angliamotorsport - 3/7/11 at 06:16 AM

Can anyone tell me which is better, intank standard bike pump or out of tank injection pump and adjustable regulator.
The application is for a hillclimb car.

Last time I used the standard intank pump but felt sometimes at the top end of the revs, particulrly in top gear, the engine was not quite delivering.

Any thoughts.

matt_gsxr - 3/7/11 at 08:58 AM

I am a fan of the intank pumps.

The advantages (as I see them) are that this has been implemented, tested and proven by a series of large multinational companies. The solution is neat and light

The only disadvantages are:
Filters are difficult to clean and check.
Flow rate is limited to the existing pump
You can't implement manifold referenced fuel pressure (so no good with Turbos)


If you could conveniently log the fuel pressure, then you could diagnose whether the in-tank pump is the problem. Fitting an external pump, FPR, new fuel take-off and fuel return and filter is going to cost a fair few quid and be quite a lot of effort.


I have just swapped pumps (turbo install) and it was a shame to take out such a reliable sub-system.

Matt

MikeRJ - 3/7/11 at 02:01 PM

quote:
Originally posted by matt_gsxr
I am a fan of the intank pumps.

The advantages (as I see them) are that this has been implemented, tested and proven by a series of large multinational companies. The solution is neat and light

The only disadvantages are:
Filters are difficult to clean and check.
Flow rate is limited to the existing pump
You can't implement manifold referenced fuel pressure (so no good with Turbos)


The pressure is controlled by the regulator, not the pump and the regulator is usualy reference to manifold pressure. Most if not all modern turbocharged cars will use an in-tank pump.

matt_gsxr - 13/7/11 at 09:08 PM

quote:
Originally posted by MikeRJ
quote:
Originally posted by matt_gsxr
I am a fan of the intank pumps.

The advantages (as I see them) are that this has been implemented, tested and proven by a series of large multinational companies. The solution is neat and light

The only disadvantages are:
Filters are difficult to clean and check.
Flow rate is limited to the existing pump
You can't implement manifold referenced fuel pressure (so no good with Turbos)


The pressure is controlled by the regulator, not the pump and the regulator is usualy reference to manifold pressure. Most if not all modern turbocharged cars will use an in-tank pump.


I am only familiar with motorcycle in-tank pumps (more specifically Suzuki ones). These have the regulator in the tank and are not manifold referenced. Sorry for any confusion.

Matt

FatChapChipChop - 24/9/11 at 03:06 PM

Hi Matt;

I'm looking at what in-tank pumpto use to power bine bodies on a 1.8 Zetec .. Got any piccies of bike injection pumps, as I'm about to get a tank made up, so would be good to know what I need?