[DeTomaso] powerjection

[Ken Green]

FAST has a very good DVD explaining the operation and tunning of the XFI system:
 
http://cgi.ebay.com/ebaymotors/FAST-XFI-Installation-and-Tuning-DVD-/390293005257
 
There are several ways to tune the system, one is to fill in a VE table.  I think FAST just released new firmware that can use measurements from the O2 sensor to automatically correct the VE table.  That basically amounts to self tuning.
 
I worked with software requirements in aerospace for about 24 years, and my experience is that software very often does not do what you wanted it to do.  The more complicated it is, and the more data it uses, the more likely that it will do something bad.
 
Ken

--- On Wed, 3/23/11, Justin Greisberg <justingreisberg at hotmail.com> wrote:


From: Justin Greisberg <justingreisberg at hotmail.com>
Subject: Re: [DeTomaso] powerjection
To: wdemelo at cogeco.ca, detomaso at realbig.com
Date: Wednesday, March 23, 2011, 9:07 AM



FAST XFI is a ported, sequential fuel injection system i think (8 injectors, one in each intake port).  more complicated for sure.  the FAST EZ EFI and retrotek powerjection 1 and 3 (but not 2) are throttle body injection systems.  a little bit like a computer-controlled carburetor.  (I'm sure you know all of this already).  a ported fuel injection system like XFI requires the intake manifold to be set up to take the injectors, which is more work.  I don't think the XFI has any self-tuning capability, which means you probably need someone who is familiar with tuning EFI as well as a dyno to tune it on.    Because all modern sports cars use a system like this, many people feel this design is better than the older throttle body injectors.  However, i think both can work, the big difference is the tunability of the system, and of course the actual tuning. justin

> From: wdemelo at cogeco.ca
> To: justingreisberg at hotmail.com; detomaso at realbig.com
> Subject: Re: [DeTomaso] powerjection
> Date: Wed, 23 Mar 2011 10:47:27 -0400
> 
> I have the FAST XFI system. The tech reps are good and there are various 
> forums with guys that will help. However, they could not tell me how to use 
> my Mallory distributor for their system. I almost went with Retroteck years 
> ago. Glad I didn't.
> Will
> 
> -----Original Message----- 
> From: Justin Greisberg
> Sent: Wednesday, March 23, 2011 6:29 AM
> To: detomaso at realbig.com
> Subject: [DeTomaso] powerjection
> 
> 
> with the original powerjection system, there was basically one v8 engine 
> program that everyone starts with. it ended up being way too rich for my 
> engine, which surprised me given what this modified cleveland should be 
> doing. they have updated the software, so I cant speak for the current 
> system. the system would just be better if either they had a number of 
> techs you could easily reach on the phone, or if there was an online forum. 
> It was advertised as plug and play, meaning you turn it on and drive it,
> but in my case, not even close. the biggest problem has been with cold 
> starting and idle. i wonder if FAST's EZ EFI is any different? justin
> _______________________________________________
> 
> Detomaso Forum Managed by POCA
> 
> Archive Search Engine Now Available at http://www.realbig.com/detomaso/
> 
> DeTomaso mailing list
> DeTomaso at list.realbig.com
> http://list.realbig.com/mailman/listinfo/detomaso 
> 
                          
_______________________________________________

Detomaso Forum Managed by POCA

Archive Search Engine Now Available at http://www.realbig.com/detomaso/

DeTomaso mailing list
DeTomaso at list.realbig.com
http://list.realbig.com/mailman/listinfo/detomaso