i can use the stock fuel pump with a t2 engine

 

Not for long!

Bosch makes a fuel pump that works well as an internal or external pump, and it flows gobs, that might be the ticket for you.

 

i donot think that there is any way that the stock pump will flow enough.. at worst, i would mount a stock TII pump, but it would probably be better to get some sort of aftermarket one.

 

I assume you are installing the TII engine into the 84 model listed in your sig?

The TII engine uses 4x550cc injectors=2.2L per min.

I have measured the stock gen1 (low pressure) pump and it flows about 2.4L per minute in ideal circumstances, ie short fuel lines, no volt drop and no fuel filter.

When installed in the car sucking through a filter and about a metre of fuel line, this drops to around 1.5L per min.

If your surge tank is 1 litre, and your injectors are on 100% duty cycle, your surge tank will be emptying at 0.7 L per min. Therefore you will run out of fuel after 1.4 minutes under this circumstance.

It really depends on the way you want to use the car, and what mods are done to it. If your engine is largely stock, I don't think it likley that you will be reaching 100% duty cycle for nearly 90 seconds, and so will get away with the stock pump.

Arran

 

....... okay let me see if i understand you aran. if i use the stock fuel pump on a stock t2 engine i can't have it full throttle for one minute...... i buy a aftermarket one.