So, for the last four days, I have been working to hopefully cure some nagging issues that my 5.0 EFI had since I first fired it up. Since it was a modified engine, I had to chip it. Unfortunately, I was new to the EFI world and bought a chip from SCT that I thought was good. It wasn't and neither was the idiot I paid to have tune it. So, after a year (long story), I finally got a chance to make some changes. I wanted to share them for any of the other EFI Mavericks/Comets. A post explaining some of the issues can be seen here: http://mmb.maverick.to/threads/speedometer-cable-for-fuel-injection-conversions.105855/#post-1073956 So, these last four days. I have: 1. Replaced the speedometer cable and added the VSS (Vehicle Speed Sensor) 2. Wired the VSS to the computer. 3. Wired the neutral/park switch to the computer. 4. Added a wideband AF sensor. 5. Wired the wideband output to pin 27 (EGR) to monitor the AF on the data logging software, Binary Editor. 6. Replaced the POS SCT chip with a Moates Quarterhorse chip. 7. Replaced the SCT BA 2600 MAF with Ford Lightning MAF. 8. Started data logging. (Took me a while to figure this out) At this site, under the services tab, is a description of the different steps to get the data: http://www.efidynotuning.com/ I loaded three different tunes today. I finally have a car that idles without stalling or dies as soon as I put it in drive. I have step four to go. I think I'm finally on track for having a car that runs like it should. I had a speedometer cable made, guessed to short. I needed a custom one to allow a silicone heat shield for the headers and to protect the VSS wires. Wasted $75 on that. Attached is a data log if anyone is interested in seeing what is downloaded. Chip: http://support.moates.net/quarterhorse/ Data logging software: http://eecanalyzer.net/be Wide band 02: http://www.zeitronix.com/Products/zt2/zt2.shtml Car details: http://mmb.maverick.to/resources/my-1971-maverick.221/ So, if anyone is contemplating a modified 5.0 EFI, I suggest looking at these sites and having all the necessary sensors installed to get one of these engines working properly. I hope this saves you some frustration and money. Micah
Appreciate the info, I plan on EFI and have most of the pieces. I have considered using an all in one throttle body over factory but haven't decided yet.
RMiller, There is going to be a lot of different opinions on that. If you are wondering, I suggest you post a new thread. Micah
I was simply thanking the OP for the info and making a statement of my intent, not trying to debate one over the other.
Actually, I thought it might be a good debate to throw out there. Maybe, it helps you make your decision. Micah
It probably would be! My decision will be made soon. I'm going to be installing the Fitech setup on my wife's 67 Firebird this summer and that will be the point where I will know which way I go. I want so bad to do the factory pieces for the challenge but there's another side of me that thinks it's not worth it when the other is self learning etc etc. This car guy disease is hell!
Toughest on the wallet. The Ford unit also learns and stores it via the keep alive memory. You do need to tune with a chip if the engine is modified. I assume you have to do some pre-programing with the aftermarket set up. I'm not very familiar with it. The only thing I will say is the stock set up does require some engineering to get it to into the car. The main issues are fuel delivery and computer location. Also, no new manufacturer is using a throttle body/wet intake set up. Does the aftermarket unit allow you to data log? Micah
I have the same gear you have for your EFI 5.0, and often reference efidynotuning. There is a lot to learn when tuning, it's certainly more complex than a carb, but the results are also more precise, and efficient! If you have any questions as you go about tuning, please don't hesitate to ask. Decipha knows his stuff, but sometimes the way he explains it is a little confusing.
Phil, I do not have the time or desire to learn all the ins and outs of this. Far too complex for me to deal with right now. I paid him to do my tunes. He has sent me six tunes so far. I was hoping to get one more today. He must have gotten busy. I think we are real close. I'm thinking about taking a spin and logging MPG out or curiosity. Mic ah
That's the best way to go, you really need to dedicate a lot of time to learn how to tune, and for most people it really isn't worth it. Your car is built far more than mine, but the one in my signature consistently gets 25-26MPG on the highway going 70-75mph, if that helps you at all. I would think with a 347 and AOD you could knock down 22-24 if it's well tuned, others do it!
On Fuel Mileage: My Comet has a 408 stroker ( built by Dr.Bill) in my 74 COMET and I'm running a 91'Mustang based EFI tuned with a MOATES chip on a dyno by a professional tuner ( Tony Ganyon) here in Florida. On the last Hot Rod POWER TOUR which was 4415 miles from Florida to End of Run the car averaged between 20 and 21 MPG . This is not too ' shabby ' for a 408 stroker. Just a further thought .. Unless someone plans to go in the 'business' of " tuning" these cars, it's probably a good idea to seek a professional which would result in a GOOD tune in a matter of hours. JOO Cometized (Chip)
