ECU tuning: was; The whole 1.8T puny injector debacle

[amalventano1@comcast.net (Allyn)]

eagle talon tsi as well as alot of audi models come with rising rate fpr's (where do you think us
cheapasses get em from?). yes, some factory turbo cars come with rising rate fpr's (i doubt they are
taking any kind of 'cheap route' there..
i misspoke there on taking map out of the equation, it doesnt do that, but it does let you get more
boost ran on lower flow injectors. a rising rate fpr compensates for change in manifold pressure,
thus keeping a constant d/p across the injectors in all conditions (normally the d/p drops as boost
rises, effectively lowering the flow rate of your injectors). this compensation makes tuning easier
as it turns one of the variables into a constant. it also makes the range of the fuel map smaller in
the end (doesnt have to go way up to compensate for increassed manifold pressure).
Al

----- Original Message -----
From: "Joe Doty" <rocco2nr@hotmail.com>
To: <amalventano1@comcast.net>
Cc: <scirocco-l@scirocco.org>
Sent: Saturday, June 15, 2002 9:23 PM
Subject: Re: ECU tuning: was; The whole 1.8T puny injector debacle


> I would disagree with you there.  A rising rate FPR a cheap way to get more
> fuel without touching the fuel injectors or fuel maps.  Most kits that use
> rising rate FPRs max out at 8-9 psi.  It's an enrichment device.
>
> I believe the best way would be an adjustable FPR.  If you are able to
> adjust the mappings via a chip or standalone management, tuning it properly
> there would be the best idea.
>
> >yea, rising rate fpr is a good move on turbo cars. it takes manifold
> >pressure changes out of the
> >equation
>
> Most fuel maps ARE based on manifold pressure changes.  It's probably better
> to tune the car there rather than futzing with the fuel pressure.
>
> Joe
>
>
>
>
> _________________________________________________________________
> Join the world's largest e-mail service with MSN Hotmail.
> http://www.hotmail.com
>