Batch Fire Vs Sequential Injection?
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Elder User
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From: washington
Batch Fire Vs Sequential Injection?
Can anyone explain the difference between the two?? I kinda know the basics of the differences but not the who thing!
Thank you!
1988 Ford F250 4x4, 5.0 liter (soon to be Roller 5.0), Mass Air Conversion, Rebuilt AOD tranny, 2.5 Dual exhaust, Headman Shortyheaders, 33" BFG's Mud Terrain, 4.11 gears.
1980 Ford F100, with 1988 5.0L Roller (carburated), T-5 five speed Borg Warner World Class Transmission, 31 spline 9" 3.73 posi , and a bunch more!! 13.78 quarter mile.
Thank you!
1988 Ford F250 4x4, 5.0 liter (soon to be Roller 5.0), Mass Air Conversion, Rebuilt AOD tranny, 2.5 Dual exhaust, Headman Shortyheaders, 33" BFG's Mud Terrain, 4.11 gears.
1980 Ford F100, with 1988 5.0L Roller (carburated), T-5 five speed Borg Warner World Class Transmission, 31 spline 9" 3.73 posi , and a bunch more!! 13.78 quarter mile.
Posting Guru
Joined: Dec 1999
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From: Copley, OH
Batch Fire Vs Sequential Injection?
[font size="1" color="#FF0000"]LAST EDITED ON 29-Oct-01 AT 05:39 PM (EST)[/font][p]MFI (Multi-port Fuel Injection or batch fire) gangs the injectors into banks, one per cylinder head in the V engines and one for the front half and one for the rear half in inlines. Pulses are timed by engine RPM and air flow but are not timed to the individual cylinders other than using #1 as a starting point for each cycle. SFI (Sequential Fuel Injection, also called SEFI or simply EFI since the demise of MFI) fires only one injector at a time and that pulse is timed to the crankshaft position, so firing order of the injectors must match that of the cylinders they service.
In practical terms, there is very little advantage to SFI over MFI in "normal" use but when you begin to stretch the performance envelope SFI along with it's more flexible mass air (MAF) control system allows greater gains gains. Where SFI does win out is in producing significantly lower emissions, which was the primary reason for it's adoption.
In practical terms, there is very little advantage to SFI over MFI in "normal" use but when you begin to stretch the performance envelope SFI along with it's more flexible mass air (MAF) control system allows greater gains gains. Where SFI does win out is in producing significantly lower emissions, which was the primary reason for it's adoption.
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Elder User
Joined: May 2001
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From: washington
Batch Fire Vs Sequential Injection?
Sorry But I really cant tell you.... I dont have a tachometer (Yet) and I have never measured the cab. I can tell you that I have a stock f250 5.0 (as far as suspension) and It fits the 33's perfectly. The wheels are 10" AR Baja's.
1988 Ford F250 4x4, 5.0 liter (soon to be Roller 5.0), Mass Air Conversion, Rebuilt AOD tranny, 2.5 Dual exhaust, Headman Shortyheaders, 33" BFG's Mud Terrain, 4.11 gears.
1980 Ford F100, with 1988 5.0L Roller (carburated), T-5 five speed Borg Warner World Class Transmission, 31 spline 9" 3.73 posi , and a bunch more!! 13.78 quarter mile.
1988 Ford F250 4x4, 5.0 liter (soon to be Roller 5.0), Mass Air Conversion, Rebuilt AOD tranny, 2.5 Dual exhaust, Headman Shortyheaders, 33" BFG's Mud Terrain, 4.11 gears.
1980 Ford F100, with 1988 5.0L Roller (carburated), T-5 five speed Borg Warner World Class Transmission, 31 spline 9" 3.73 posi , and a bunch more!! 13.78 quarter mile.
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Elder User
Joined: May 2001
Posts: 662
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From: washington
Batch Fire Vs Sequential Injection?
Question,
I Know that my truck was Batch fire before I did the mass air conversion. Now that the mass air is done did that change it to a sequential or is it still a batch fire.
I am trying to find out if I need to change the injector wires along with the distributer wires when I swap from the stock 5.0 to a roller 5.0..
Can anyone help me out PLEASE!!!!!!!1988 Ford F250 4x4, 5.0 liter (soon to be Roller 5.0), Mass Air Conversion, Rebuilt AOD tranny, 2.5 Dual exhaust, Headman Shortyheaders, 33" BFG's Mud Terrain, 4.11 gears.
1980 Ford F100, with 1988 5.0L Roller (carburated), T-5 five speed Borg Warner World Class Transmission, 31 spline 9" 3.73 posi , and a bunch more!! 13.78 quarter mile.
I Know that my truck was Batch fire before I did the mass air conversion. Now that the mass air is done did that change it to a sequential or is it still a batch fire.
I am trying to find out if I need to change the injector wires along with the distributer wires when I swap from the stock 5.0 to a roller 5.0..
Can anyone help me out PLEASE!!!!!!!1988 Ford F250 4x4, 5.0 liter (soon to be Roller 5.0), Mass Air Conversion, Rebuilt AOD tranny, 2.5 Dual exhaust, Headman Shortyheaders, 33" BFG's Mud Terrain, 4.11 gears.
1980 Ford F100, with 1988 5.0L Roller (carburated), T-5 five speed Borg Warner World Class Transmission, 31 spline 9" 3.73 posi , and a bunch more!! 13.78 quarter mile.
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