Wrong... the fuel injectors flow a certain amount at a certain
pressure....increase the pressure, and you increase the amount of fuel going
through the injector... remember, injector flow rate is calculated at a
specified fuel pressure...which should be between 44.2-54.2psi on the
Dakotas (according to the factory service manual)
Most OE systems maintain a fuel pressure of between 36 and 43.5 psi over the
intake manifold pressure. Fuel pressure can be raised to increase the rate
of fuel flow but this should not exceed 60 psi in most cases. It takes 4
times the fuel pressure to double fuel flow. Raising the pressure to extreme
levels is very hard on the pump and can lead to leaks or failures in the
plumbing and injectors themselves.
The biggest problem with going with bigger injectors is not fuel
pressure...the factory fuel pump can handle over 40lb injectors @ 44psi with
no problem....The problem is the PCM adjusting for the larger injectors...
an overly rich idle is fairly common with larger injectors... this is where
the Hyperspeed module comes in.... it adjusts the fuel enrichment...if the
engine is running too lean, it tells the pcm to richen the mixture...it will
also lean out the mixture if it is too rich...
To me the best way to go would be larger injectors and the Hyperspeed
module....rather than a boost-a-pump, or FMU...
But, that's just my opinion...
Later,
Tom "Slick" North
96 Dodge Dakota 5.2L RC
71 Chevelle Malibu 350
71 Porsche 914/2.0L
----- Original Message -----
From: "Andy Levy" <andylevy@yahoo.com>
To: <dakota-truck-moderator@bent.twistedbits.net>
Sent: Friday, January 25, 2002 8:24 PM
Subject: Re: DML: msd fuel pump booster
> No matter how big the pump, the injectors will keep pumping the same
amount
> of fuel into the cylinder. Partly because of their own flow rate, and
partly
> because of the regulator between the pump and injectors.
>
> Chad Evans wrote:
>
> > would the msd fuel pump booster be better than getting bigger injectors
?
> > it is suppposed to be adjustable voltage to your fuel pump.
> > it's on page 90 of the new jegs catalog.
> >
> > hemidak@msn.com
> >
> > _________________________________________________________________
> > Join the world's largest e-mail service with MSN Hotmail.
> > http://www.hotmail.com
>
> --
> -andy
> andylevy@yahoo.com
> Maintainer, DML FAQ - http://www.dakota-truck.net/faq/
> http://home.twcny.rr.com/andylevy/dakota/
> '99 CC 4x4 318 auto
>
>
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