Outer Limits 4x4 Board

After reading some posts on here about fitting a lift pump to a TD42 I contacted a reputable Injection shop and they told me I did not need one.
I am still not convinced and am fairly sure that adding one will help the old girl out as she really slows down around 3 grand. Now what type of pumps are you guys using and does anyone know of a good place to get them?
What kind of flow rate to they need to have and what pressure? I have read on here that a few are using Holley Blues but is anyone using anything different?
Do you need a surge tank?
Thanks in advance Smithy.

No you dont need a surge tank. Any type of low pressure pump would do the job.A pump that feeds a carb would be the best. Not sure but I would of thought cov's or some place like that would stock them.

I was talking to Scott at Denco about this problem. He could not reproduce this problem on the test bench while doing work my modified pump (110% over std).

But he did suggest that the size of the fuel line could be the cause of this, as the line on the test machine is 12mm compared to the 10mm line on the car.

I suggested to him on the fitting of at electric pump to pressurize the fuel line to help in the delivery of fuel to the Inj pump, his answer was as long as the line pressure is not to high, for if it is to high the Inj pump will have problems with maintianing correct Inj settings.

Will endevor to find out what max pressure is and will post again when have the info.

I have been looking into this myself because I plan to fit a bypass type submicron fuel filter inline as my final filter and need to eliminate the drop in flow to the inj pump. I was thinking this also gave me the the added benefit to the inj pump where it did not have to work as hard (less heat) to gather fuel would be a bonus.

One thing to remember if you have a water separator filter like the genuine or a cav unit they are proven to work best under suction not pressure so the pump should really go after the filter.

Just ask at any auto parts store for a replacement electric pump to suit a SWB 85 MQ L28 engine. These pumps are cheap because they suit so many carby cars, they put out less than 5psi and will keep ticking away for 10-15 years. If it works somewhat you could always consider upgrading to a holly with a regualtor to see if you can then fine tune.
The above is my plan ATM hope it suits you also.

cheers fnq

Presuming the car has a turbo fitted, do you have a boost compensator fitted? Mine too feels a little bit of a lag above 3000 RPM, but makes max power at 3500 RPM on the dyno.

What I'm thinking/wondering is, to make a best compromise setup the diesel place will tune the fuel for normal driving revs, therefore it will be lean at high RPM and rich at low RPM. The boost compensator should allow more fuel through as the boost increases and the pump delivers more fuel with more RPM. This leads me to think that they generally run a bit lean at high RPM, which is why they don't rev as freely as they should.

On a very high HP motor (high fuel) it may be necessary to introduce a small pump. The size of the fuel filter should also really be increased to minimise the pressure loss there.

Just thinking out aloud.