Fuel Injection Question

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Sep 18, 2011 | 10:14 AM

currin20fan

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Stage I

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From: Beaufort, SC

Fuel Injection Question

Does anyone know what year the Harleys started with fuel injection? Just curious.

Sep 18, 2011 | 10:15 AM

soft 02

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From: TOAK western branch

I think it was first an option in 99 and no choice in 07.

Sep 18, 2011 | 10:43 AM

larsfum

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From: On a Lake, not far from the Gulf

I believe that the first year of Fuel Injection was an option on the 1996 touring bikes. I have a 1998 and it is injected.

Sep 18, 2011 | 10:46 AM

the blob

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i was thinking in1994 when the first roadkings came out.

Sep 18, 2011 | 10:57 AM

ChromeJunkie

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From: West Texas Sandhills

Two weeks ago last friday. Seriously, I think larsfum hit it with the touring models, and most everything else, except Sportsters in 99.

Sep 18, 2011 | 11:03 AM

schumacher

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From: Springfield, Ohio

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Sep 18, 2011 | 11:43 AM

jmorganroadglide

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From: texas panhandle

Why throttle body in lieu of MPI? Is MPI doable on a harley? Any advantage?

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Sep 18, 2011 | 12:24 PM

Bluehighways

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From: Southern California

Quote:

Originally Posted by jmorganroadglide

Why throttle body in lieu of MPI? Is MPI doable on a harley? Any advantage?

The Delphi System is a Speed/Density Port Fuel Injected (PFI) system. Even more to the point it is a sequential PFI System. FYI: MPI, SFI, MPFI, CFI, etc. are essentialy marketing terms. TBI is the correct acronym for Throttle Body Fuel Injection. Throttle Body Fuel Injection is usually less expensive to manufacture; but in the dynamics of the engine, one cylinder can have a tendency to rob another cylinders fuel. As a result, different cylinders can get slightly different mixtures. Since the designer has to be concerned with a worst case scenario, with respect to performance, emissions and economy; the trade offs with TBI usually result is a loss of power when compared to a PFI system and even slightly more with a sequential PFI system.

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Sep 18, 2011 | 12:34 PM

TennesseeMustangPerf

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Optional in 1996 on some models, optional in 1999 for others, standard in 2007 thanks to the EPA.
Sportsters did not have the option, all 2007+ were EFI, all 2006 and earlier models were carbed.