Felpro EFI review

[David Piper]

Any truth to the rumor that Felpro gave up on their system amidst lawsuit
threats?

TurboDave

At 11:15 PM 6/25/98 -0400, you wrote:
>
>
>here is some info on the Felpro unit
>came from the Fordnatics list (forwarded with permission)
>
>Clive 
>
>>>Visited the URL, saw the car, bought the coffee mug.
>>>Hey, did you notice the "sheetmetal intake manifold modified for
>>>Fel-Pro's new port fuel injection system".
>>>All I can say is huh? since when? anyone know anything more about
>>>Fel-Pro's new PFIS?
>>
>
>This is a repost of a message I posted to the Buick mailing list a while
>back. Hopefully it will help you in answering any of your questions
>concerning the Felpro SEFI8LO. I have some experience with these systems on
>the Ford's as well as I have helped out the Keen brothers some with their
>unit. I also calibrated the Scranton brother's car for the Spring Break
>Shootout earlier this year. If anyone has any specific questions or wants
>further information, please feel free to email me.
>
>>Hello list,
>>
>> Check out the
>article in the May '98 issue of Chevy High Performance
>>on the FP
>Performance's new EFI system. It makes the Accel DFI look
>>rather old. It
>has 8 low inpedance injector drivers so you can taylor
>>each injector pulse
>width to meet your needs. It also has the ability to
>>control the timing of
>each individual cylinder independently of the
>>other cylinders. It can use
>a 5-wire wide band O2 sensor capable of
>>accurate A/F ratios from 9.5:1 to
>16:1! Check it out, it's pretty neat.
>>
>
>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
>JCarter at Tampabay.RR.Com
>10.92 @ 123 through the mufflers
>
>