Bill,
Maybe this will help in your decision making equation. Jacking the pressure
up through the usage of an adjustable pressure regulator alone will shorten
the life of the injectors. What happens is this:
Driving the pressure up on the stock injectors will indeed deliver more fuel
into the cylinder. This additional pressure takes its toll on the internal
components of the injector and will shorten its useful life. Also, the
proportional return on the pressure increase in non-linear. Another words,
if you double the fuel pressure, you will not get double the fuel delivery.
It will be a diminished percentage.
Increasing the size of the injector will give you more fuel delivery without
decreasing its life expectance. But you don't want to large of an injector.
If to large an injector is selected, the fuel will not properly atomize
exiting the nozzle, and your performance will suffer from a poor burn rate.
(Standard formula for this: .5 pounds per hour per horsepower.)
Also, at WOT you will more that likely suffer from fuel starvation if the
fuel pump cannot deliver an adequate supply of fuel to the injectors. In
this case, you will also want to consider a higher pressure fuel pump. Keep
in mind also that over time, the fuel pump delivery rate is going to
decrease over time due to wear. This will further add to the fuel
starvation dilemma.
Increasing one or maybe two injector sizes will probably work fine, but
anymore than this really warrants upgrading of the entire system. I hope
this helps.
Rich - Ashburn, VA
----Original Message-----
From: Bridges, Bruce [mailto:bbridges@alarismed.com]
Sent: Thursday, October 08, 1998 1:46 PM
To: 'dakota-truck@buffnet.net'
Subject: RE: DML: The new guy
Bill,
Dont jump too fast. You only get a lean condition with the 52mm 700+cfm TB,
not the Stage 1s or the home style port and polish units. I dont think you
can increase the FI pressure to get a richer mixture though (I could be
wrong...) We should have some good data for DML review by the end of next
week/ week after if you can wait so you can make a more informed decision.
BKB
-----Original Message-----
From: William Blount Arthur [mailto:m990198@nadn.navy.mil]
Sent: Wednesday, October 07, 1998 9:53 PM
To: dakota-truck@buffnet.net
Subject: Re: DML: The new guy
Yeh, especially if I dont have all that crap in the truck. I am thinking
maybe I want to get some 24 lb injectors. that guy said the Jet leaned it
out too much. Maybe I should just try to get an adjustable pressure
regulator like the 5.0 guys use? Later
Bill
On Wed, 7 Oct 1998 Boog318@aol.com wrote:
> Bill
> I was running in 68deg. with 95 % humidity. Search the archives for
"Boogs
> Racing Times" Yeah you have to run up at Cecil Cty. You will probably
run
> faster.
> Oct 23rd.
> Boog
>
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