Felpro System (was Street/Race EFI Article) (fwd)

Mark Romans romans at pacbell.net
Thu Mar 26 05:30:03 GMT 1998


Hi Jesse et al....here's a link.
Mark.
 http://userdata.acd.net/lance/sefi8lo.html

-----Original Message-----
From: Jesse R. Ortiz <jr at ij.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Wednesday, March 25, 1998 3:37 PM
Subject: Re: Felpro System (was Street/Race EFI Article) (fwd)


>Just more question on this, Does anyone have a website where you can get
>more info, pricing on this system?
>
>Thanks
>
>
>>DIY Group: The message below is from Jay Carter, a much respected
>>Buick GN tuner, who does GM ecm chips and much fuel inj experience.
>>It outlines very well the new FelPro fuel injection and may be of
>>interest to this group:
>>Regards,
>>
>>frank parker
>>
>>
>>From: Jay Carter <jcarter at gte.net>
>>To: gnttype at gnttype.org
>>Subject: Felpro System (was Street/Race EFI Article)
>>
>>I have setup and programmed several of these units on different vehicles
>>and I have to say that this is the slickest unit I have ever seen. Not
only
>>is it relatively simple to calibrate compared to other units, it's also
>>very user friendly, very fast and has some really trick features. One such
>>feature that is the slickest thing I have ever seen is the ability to
>>record a run and the come back and overlay it on top of your base fuel
>>table and play it back in slow motion. This lets you analyze what happens
>>every step of the run and make changes if necessary.  It even has a
>>simulated engine sound that climbs in tone as the RPMs go up! The closed
>>loop setup also makes calibration a snap. Just plug in the A/F ratios you
>>want to use and the ECM will correct itself back to the commanded A/F
>>ratios as long as your within the (user defined) correction limits. This
>>way, you can play the run back, change the base fuel map as needed and
>>eventualy remove the O2 and have a system that's 100% dialed in. The
timing
>>table is also much more detailed than the DFI and allows much more precise
>>control of the timing. It also has an adjustment that allows you to set
the
>>timing precisely and remove all the guesswork from what your timing REALLY
>>is (Unlike the DFI).
>>
>>While on the surface, this unit may seem like a jazzed up DFI. Well, its
>>not. There is SO much more going on here than meets the eye. This system
>>uses an entirely different approach to delivering fuel to an engine than a
>>DFI. Instead of setting up your fuel table according to base pulse width,
>>the Felpro system works on a volumetric effiecient approach. There are
>>many, many factors used to calculate fuel delivery instead of just
plugging
>>in a base pulse width and going like the DFI does.  Engine size, injector
>>size, etc all play an important role in the fuel delivery algorithm on the
>>Felpro system. Let's say for example your car is running 55lb injectors
and
>>the calibration is perfect but you wanna switch to something different.
>>So.. you go out and buy a set of 83s and install them in the car and
change
>>your injector constant to 83lb/hr. Now.. while this won't get you DEAD on
>>the money, it will get you very, very close so that only small adjustments
>>will need to be made. Pretty slick, huh? This is a TRUE speed density
>>system.. not a lookup table system like the DFI has. Also, because the
>>system is true speed density and uses the VE table, the smallest increment
>>of change is 8 uS (microseconds), while the DFI is 64 uS. This is very
>>important for cars running big injectors.
>>
>>
>>Another great feature of the system is the aforementioned data logging
>>system. It allows recording of a "dashboard" during a run. There are 15
>>"dashboards" that are preset but can be altered by the user. You can pick
>>and chose between which ones you want to record and also how many frames
>>per second you'll be recording. You can also set the sensor that triggers
>>the recording process to start (Most every sensor on the car can be used
as
>>well as RPM, etc) and you can set where the threshold is. Also, all data
>>recording is handled INSIDE the Felpro's PC software (Calcom). You dont
>>have to exit the program and load the data file into a text editor to read
>>it and analyze it. You also get nice graphs that can be stepped through a
>>frame at a time as opposed to a big column on numbers. However, the data
>>can be exported in a text file if you so desire.  The number of frames per
>>second can be adjusted from 1 to 50 frames per second but is somewhat
>>dependent on the speed of the PC you're running Calcom on. 50 frames on a
>>fast 486 is not a problem, tho. The limiting factor is the number of
>>recordable frames per second which is right now at 150. However, with a 10
>>second car, that's still about 13 frames per second.
>>
>>Another great feature of the software is the editing ability to cut and
>>paste, manipulate blocks of data and interprolate.  You can cut blocks of
>>data  from an offline calibration and paste in into your existing cal
file,
>>change values in blocks of data without having to change EVERY valve (like
>>DFI made you do) and you can even interprolate data by highlighting four
>>corners of your map and telling the software to interprolate between the
4.
>>Very slick.. similar to working with a spreadsheet. Constructing a base
>>calibration is a snap. You can set every valve in the VE table to 60-70
and
>>the car will most likely start and run because the wideband O2 will bail
>>you out of trouble.
>>
>>
>>Sorry to be long winded but hopefully this will help answer some of the
>>questions that people have concerning this system.
>>
>>Jay
>>
>>Jay Carter
>>10.92 @ 123 through the muffler
>>
>>Mail To : JCarter at GTE..NET
>>
>>
>>
>




More information about the Diy_efi mailing list