GIRTHQUAKE said:
NOHOME said:
By the way, Mustang is a huge fan of Fitech EFI He believes every classic car in the world should have one.
Quoted and upvoted for truth. Once installed and properly setup, you no longer have cold start issues, better mileage, no worries about vapor lock... I totally understand running a carb for the "spirit" of a build, but fuel injection is just flat-out better.
Actually, I need to apologize.... I posted that Mustang likes the Fitech knowing that he reads this thread ( but forgot his logon stuff) and expected a rebutal. Or a beer can to the head. He detest the Fitech. With a passion. I on the other hand, had spent all my $$$ on the Fitech and any other solution was also going to be $$$ so had to make it work.
The Fitech led us a merry chase to where we got it running ok. Mustang actually gave up, and he knows quite a bit about fuel injection. It was partly Fitechs terminology not jiving with industry standards that drove him nuts. It turned out we had a fault with the front rear throttle plate synchronization that we had to become aware of before we could even begin to tune the thing.
I will say this about the Fitech. IF your engine is built properly with matching components and has no issues and you install the Fitech and the supporting fuel system without making any mistakes and know how to tune a carburator, and are conversant with EFI terminology, it will work. Eventually.
The above is assuming you replaced the supplied temp sensor ( 100% faulty if you believe what you read) and did not receive a faulty Fitech unit in the first place.
I suspect a majority of the Fitechs installed are tuned to " good enough" because you eventually stumble on a random setting of parameters that allow you to drive the car. I bet that out of ten parameters that you mess with, 5 are wrong and the other five are trying to compensate for your other five.
Tuning fatigue takes over and you just leave the thing alone and live with it. This is where I am at. No berkeleying way of knowing if it is tuned to potential. It starts well and you can drive away right away, When you stomp on the pedal you go forward in a huge hurry. But I think there is a lot left in the tune to make it a better car. It kinda acts like it wants to die when returning to idle, but then at the last second compensates with revving on its own to 1500 rpm andthen stabilizes to the desired idle, Not sure about fuel economy but it seems thirsty. Might be my enthusiasm on the gas pedal. It pops like crazy on overrun. AFR jumps to over 21/1 when you let off the pedal it and sounds like a war zone. Do I try to tune it out and risk making things worse? Or do I learn to live with it? One more study item: is it possible to save the current fitech tune so that when I berkeley it up trying to improve, so I can go back to a known good enough tune?
Installing Fitechs for customers would be a nightmare. You would instantly become liable for any dump stuff done during the drivetrain build and install.
For $1000 more you can get port EFI and much better tunning support from both the system and the manufactureres, so if starting over again, that would be the way to go. Or a Holley Street avenger for $400.