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Forged bottom end, Cnc ported Edlebrock heads with 2.25" and 1.75" valves, Victor intake, Custom solid roller cam, high 10 something to 1 compression, can't exactly remember right now. 2" primary tube headers. Motor was in a street strip mustang I had. I pretty much had the cam reground to be better suited for the bronco and swapped the tunnel ram for the victor and the Fitech.
I live at 7,000 ft and frequently take trips up to 10,000-11,000 feet. There is a big difference between a carb'd system and an EFI system.
There is also a big difference between a carbureted system and an EFI system in extremely cold temperatures. For example, if you live in an area that gets down to -40 degrees, an EFI system often will not even start, whereas a properly tuned carburetor will. An EFI system needs one or two full revolutions to orient the pip for the computer before it can trigger the ignition system. At those temperatures, you may only get a few revolutions out of the engine before the battery is done. This gives carbureted vehicles a distinct advantage because as soon as the engine starts to turn, the ignition system is firing.
But like your example, that is not an everyday situation, is it?
An EFI system can typically handle elevation changes automatically whereas a carburetor would need a jet change for *optimum* performance. But an EFI system is going to need a LOT more wiring and a bunch of sensors to make that happen. With those extra components comes less reliability - especially if you are dealing with an aftermarket EFI system.
I'm really digging it so far. On install just set your initial timing to 15 deg, lock it down, and let the ECU do the rest. So far haven't had to adjust anything with the timing since I installed it, ran great with default settings.
I appreciate the info and followed your build thread! It's really helpful
Yep, I just heard that all the OEM's are going back to carbs - they are definitely superior in driveability, elevation changes, cold weather changes, cold weather starts, self learning, tuning, and diagnostics for repair and maintenance.
Look for it in the 2020 F150.
Bonus is that due to less wiring and sensors, pricing will come down $800 off the base price.
Right? There is a reason that you don't see carbs coming off the showroom floor for the past several decades. They aren't as good.
Aftermarket things don't really bother me - especially with older vehicles. Chances are, the carb you will slap on to the engine will be aftermarket.
The introduction of more wires/electronics/sensors does increase the number of possible failure points. But, being able to adjust my own maps, visualize and record data easily, and have multiple tables that I can load quickly for different scenarios make it worth it to me. Personally, I have had less trouble with EFI systems than I have with carbs.
And my case isn't that "out of the ordinary". There are plenty of people out west that live at higher elevation and have to frequently drive to a much lower or much higher elevation. Hell, a lot of people commute to where I live at 7500 feet from 4000 feet daily.
I have been running fitech for about 3 years on my '77. I am into it almost $1700 with the fuel system. That is for go EFI 600 in tank pump, AN fuel hose/fittings and a billet fuel filter.
if I was to do it over I would go with MSD Atomic EFI with fuel system which is about $1200. This is the best value and they have been doing it a lot longer.
the fitech software is a bit buggy and overall the system didnt meet my expectations. It is not self tuning, that's BS.
That being said my next build on my '69 will be carb, probably a Holley brawler or quick fuel. It just really wasn't worth the cash outlay.
Yep, I just heard that all the OEM's are going back to carbs - they are definitely superior in driveability, elevation changes, cold weather changes, cold weather starts, self learning, tuning, and diagnostics for repair and maintenance.
Look for it in the 2020 F150.
Bonus is that due to less wiring and sensors, pricing will come down $800 off the base price.
I just finished the Fitech I shall on my 445 a few weeks ago. I can’t say a lot about since I only ran about half tank of gas through it other than right out of the box it runs better. I would’ve run it some more but found I needed to swap t stat to get it to warm up more. Overall though at least as of now I like it more than my Quick Fuel 780.
Yep, I just heard that all the OEM's are going back to carbs - they are definitely superior in driveability, elevation changes, cold weather changes, cold weather starts, self learning, tuning, and diagnostics for repair and maintenance.
I never said carburetors were "superior" in anything over EFI, Chief. What I said was, when they are properly set up and tuned, there is very little difference between a carbureted system and an EFI system. That being said, I will never understand why someone would spend well over $1000(!) to replace their carburetor with an EFI system. ESPECIALLY for an aftermarket throttle-body style EFI system that will have very little support. If you insist on EFI. you would be much better off swapping in a stock EFI from a newer vehicle. And to be clear, I would never replace a stock EFI system for a carburetor, either All things being equal, the end result wouldn't justify the change in either direction.
Originally Posted by 69Bronc
Right? There is a reason that you don't see carbs coming off the showroom floor for the past several decades.
The main reason is because it is easier to get a vehicle with EFI to pass emissions regulations.
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