[fiddysix]

i am currently installing a dual quad fast system on my 56 jr stk project i will post the install and results . i went with it because with air cleaners on it will looks stock
wayne

 

[Had a few Tri 5's]

Sorry guys, been away for awhile. I am running a 195 degree thermostat. You have to run a little hotter that the 180 to get the EFI to come out and stay out of the cold run circuit.

I looked online at what the Ford TPS is set to as this is what MassFlo uses. It is however different with their system. I got a hold of someone there, not the owner, and he gave me the proper voltage reading for the TPS at closed throttle. I don't have it here in front of me, but it was something like 4.9 volts. Anyway, it was quite far off, and setting it helped one issue I was having. The issue being when I would hit the throttle, it would take about 12 seconds to return to idle. Here is where another example of the owner comes in....he said I was just exaggerating the 12 seconds and it was normal for it to take 6 - 8 seconds. What normal EFI setup takes 6 - 8 seconds? I actually video taped the tach and emailed it to him. It took 12 and 13 seconds. He never replied. Pretty much everything I learned about the system was after I bought it and it was from other frustrated owners of the system.

This next time I am studying and listening before I buy. What I have been hearing so far, and probably what I am headed toward is a FAST system. They have a good reputation for knowledge and service. They are more than just a high priced ad in the magazines. They have both tunable and self learning, TBI and TPI. Their TBI looks pretty much like a carb, so if you are looking for a system more like a stock look...

I have an Edelbrock Pro Flo II which is pretty hard to beat. It worked from the start with no issues. I have around 10,000 on it now and still no problems.

A friend has a megasquirt system. He too is pretty happy. All I can really say is there is a ton of information out there, do your research. Do not go on one post or Hot Rod article. Get a large base of knowledge, then average it.

 

[henrys57wagon]

Thanks "had" (sorry don't see your name anywhere) for the info. Would you send me a PM of any other tuning info you have? I once did an overbore on a drag Camaro's throttle body so at least I am familiar with setting the TPS. Did you fiddle with the timing, Chris recommends 14* initial in the instructions. The more I read(about an hour last night) the more I feel I am not the only one who Chris thinks is an idiot. My car dies sometimes after a few min's of running when stopping at a corner, it always fires up again. Thanks and good day.

 

[Old Buzzard]

My $.02..

"Production mass air sequential electronic fuel injection computer.

I wonder how he's getting sequential operation without a crank sensor??

Eight high quality fuel injectors, sized to your application. The injectors are sized to allow ample room for large increases in horsepower. These fuel injectors are held to much closer tolerance than typical production injectors.
Ya, right..Likely amounts to a set of flow matched injectors... NOTHING special about them.
All needed sensors. Most of the sensors are mounted right on the injection system for a simple install. No crank sensor to complicate the process!"
He has the MAF in the air cleaner...Great place to expose it to turbulent air flow and screw up it's ability to read consistently.

For that kind of green, it would be a much better deal to get a tuned port for the average engine.

As for this problem:
"The issue being when I would hit the throttle, it would take about 12 seconds to return to idle. Here is where another example of the owner comes in....he said I was just exaggerating the 12 seconds and it was normal for it to take 6 - 8 seconds. What normal EFI setup takes 6 - 8 seconds? "
If there's a throttle cracker/follower adjustment, that issue could be tuned out. [He states it's a production ecm.] Does the sytem have an IAC idle control?

Want a REAL dual quad EFI system?? Here ya go: The engine in my 6T5 Belve/HEMI car. Yep, it's home built.....:sign0020:

 

[finn210]

"Production mass air sequential electronic fuel injection computer.

I wonder how he's getting sequential operation without a crank sensor??

Eight high quality fuel injectors, sized to your application. The injectors are sized to allow ample room for large increases in horsepower. These fuel injectors are held to much closer tolerance than typical production injectors.
Ya, right..Likely amounts to a set of flow matched injectors... NOTHING special about them.
All needed sensors. Most of the sensors are mounted right on the injection system for a simple install. No crank sensor to complicate the process!"
He has the MAF in the air cleaner...Great place to expose it to turbulent air flow and screw up it's ability to read consistently.

For that kind of green, it would be a much better deal to get a tuned port for the average engine.

As for this problem:
"The issue being when I would hit the throttle, it would take about 12 seconds to return to idle. Here is where another example of the owner comes in....he said I was just exaggerating the 12 seconds and it was normal for it to take 6 - 8 seconds. What normal EFI setup takes 6 - 8 seconds? "
If there's a throttle cracker/follower adjustment, that issue could be tuned out. [He states it's a production ecm.] Does the sytem have an IAC idle control?

Want a REAL dual quad EFI system?? Here ya go: The engine in my 6T5 Belve/HEMI car. Yep, it's home built.....:sign0020:

:bawling:....because its not mine.

 

[roger1]

For that kind of green, it would be a much better deal to get a tuned port for the average engine.

That's what I would do. I sure like that one from Affordable Fuel Injection. They even custom program it to your engine and cam for no extra charge.

 

[Had a few Tri 5's]

I believe it does have an IAC. If I remember right, it is at the back of the throttle body. The wiring diagram has an IAC solenoid listed, so I must have remembered right. What would I adjust there? I thought it was just a plug in sensor, no adjustment.

They use a 86-93 era Ford ECM, with some tweaking. I was initially interested in it because of the claim of the self tuning. Now I wish I had some control. At least the Edelbrock has a hand held tuner you can monitor some parameters like TPS, airflow, timing, vacuum at different rpm, fuel mixtures at different rpm/vacuum and so on. All of which you can change. Once you have this MassFlo, you are stuck with whatever it wants to do unless you get an add on to the ECM like quarterhorse or something like that. I tried all different timing, starting at 14, up as high as 18, down to 10. Minor differences were noted. I tried different fuel pressures as well. This was another suggestion the owner had, "bump er up to 45, maybe 50 psi. See how that does it". He did also bring up the turbulence issue on the MAF. He says you have to run a closed top air cleaner to eliminate that problem.

A stock Ford TPS for this year setup shows .98VDC on the green wire coming out of the TPS. MassFlo told me it should be .75 to .90 VDC on the green wire. Supposedly it is a 86-93 Ford TPS.

Once I got into this whole thing a little bit, I realized there are much better ways to do this.

Henry, I have not had the stalling issue you have, but it does not surprise me. You might check the voltage on the TPS when it is warmed up at idle. Perhaps yours is set too low. My problem was the opposite. When I would come to a stop, the engine was still up around 1,500 rpm for awhile, making it a little harder to get it stopped. I messed with the TPS some, but it didn't make much of a difference. It still takes time to return to idle.

Now Old Buzzard....what can I do with the IAC solenoid? Please make my day and tell me there is something to adjust...

I want to say I am not speaking badly about this company, only speaking of my experiences....and my experiences suck with this system.

Oh, and the name's Mark......I should put that somewhere

 

[Guest]

I'm a big believer in the K.I.S.S. principle and it's a h*ll of a lot cheaper to play with a Holley. If I was h*ll bent on efficiency and never played with my engine, then fuel injection would be the way to go.