how do you set the psi base pressure? do you have to have a fpr?

 

so your telling me I have potential to hit 650RWHP with Kenne Bells Boost-A-Pump and meth.....badass

 

I just finished reading through this walkthrough of the BAP: http://www.kennebell.net/techinfo/general-...uelpumptech.pdf I recommend everyone take a look.

Very interesting to note the differences between flow vs volume and how voltage plays into the equation. Also of note the basic breakdown of delta pressure at the injector vs the fuel line...has be questioning whether some of the high HP setups actually have a need to upgrade their fuel lines for modest power goals (500-600whp). If anything, this just made me more aware that I need a way to monitor my fuel pressure. Most people's consensus is that if the AFR is good, then their pump must be doing alright. While this may be the case, I'd like to have the actual insurance of knowing exactly whats going on when it comes time to push things to the limit.

Evans, can you comment on this line from the BAP doc:

"Air fuel ration also affects pump flow. Example: Richening AF ration 10% from 12.5 to 11.5 increases pump flow 10%"

Seems like it was decrease not increase the flow if you're asking it to supply more fuel to create a richer AF.

 

So with all this being said, for under 700whp, this is the most cost effective way of adding enough fuel to make a reliable 650whp or so setup for my car..... Is this something my tuner should be fimilar with? im sure there is a right and a wrong way to activate the BAP at a desired moment.....

 

According to their docs, it is designed to activate only above atmomospheric pressure. So out of boost, it isn't in use.

 

Wouldn't touch a Walbro, noisy and unreliable. There are far better pumps available for around the same price. For and external pump setup you would do better with a Bosch 044 (300lph) or something like Pierburg E3L (up to 360lph depending on model no). Both of these pumps are the choice for the majority of topflight motor-sport teams in Europe and Asia and the Pierburg being used as original equipment by a large number of high performance/supercar manufacturers due to their high flow rates and low noise. They achieve this by using a screw pump design.
We recently fitted with great success several Fuelab Prodigy Fuel Pumps and have found them to be first rate so you may also want to consider those as they offer a large range of fuel flows from 105 GPH up to 190 GHP. The Weldon 600-A is another great pump which has proven reliability and Weldon from personal experience are a very good company to deal with. It is a very quiet pump with it's only draw back being that is it's not compatible with Alcohol where as the Fuelab is.
If you wish to keep it all intank then you may struggle with you're only option being using a Boost-A-Pump but again I would avoid the Walbro and go for a Bosch 040. The 040 flows roughly the same as an 044 at around 300lph.
Personal recommendation for your setup would be an external solution using a Fuelab Prodigy Pump.

 

This is true. They come with a switch that turns it on at 3psig I believe ... some people do not connect it and therefore it stays on all the time.

I have been using one with now problems.

J

 

what kind of power are you making?

 

Good recommendation from Atomic on the FueLab,
Their only drawback is that they're external pumps, so you would need to re-plumb your fuel delivery setup (re-tap OEM tank or run a surge tank)
I'm running one in my Subaru STI and it's an excellent pump. Way quieter than Aeromotive A1000's and has an integrated speed controller. I use my standalone ECU to speed up the pump at engine=4000rpm and boost =3psi. The ECU sends a signal to the pump and switches it to high speed. It works awesome!

The Bosch 044 is also a very good pump, but it's darn LOUD! On the S2000 it would most likely be extremely annoyingly LOUD since the tank is just behind the seats.

I think switching a pump by using a Hobbs-type pressure switch is a little risky as those switches my eventually fail. You will then be left with a lean-prone fuel system.

here's my write up on the FueLab for my Subaru.

http://forums.nasioc.com/forums/show....php?t=1742830
Different application but you can get an idea. This would be for a high-demanding fuel system. It all depends how much fuel you will need. Your power goals may just require an internal Walbro, Denso, or Bosch + KB BAP. That may be all you need and it is a very simple setup. These external pumps require lots of new hoses, fittings, and wiring.

 

Nowhere near your power goals, but on my '06 it was the easiest way to do it when I did. I am at about 400 to the wheels ... and the boost a pump was the only way to get there with the stock pump.

J