90 vs. 91 FSM? - ZR-1 Net Registry Forums

Paul Workman · 10-22-2014

Ami's new toy is a 91 Z, and mine is a 90. Do ya think there's difference enough between them to warrant a separate FSM, or can I get by with the 90 FSM - more or less? (I'd be interested in a 91 FSM if anyone has one gathering dust somewhere

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-=Jeff=- · 10-22-2014

yes, mainly the electrical.. there are quite a few changes from 90 to 91, especially the forward engine harness for sure, plus changes to the dash wiring to allow for the Delayed Accessory Bus (keeps radio and windows powered for an extra 10 min or until a door opens)

that said, for most things, no it is not needed, but for other stuff I would recommend it.

Paul Workman · 10-27-2014

Thanks, Jeff. I (and Santa) will keep an eye out for a set! Hers has a few user mods already; secondary delete, coil-overs, radio (kaput - have replacement = why I ask about the FSM).

Paul.

10-22-2014	#1
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	90 vs. 91 FSM? Ami's new toy is a 91 Z, and mine is a 90. Do ya think there's difference enough between them to warrant a separate FSM, or can I get by with the 90 FSM - more or less? (I'd be interested in a 91 FSM if anyone has one gathering dust somewhere)

10-22-2014	#2
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,155	Re: 90 vs. 91 FSM? yes, mainly the electrical.. there are quite a few changes from 90 to 91, especially the forward engine harness for sure, plus changes to the dash wiring to allow for the Delayed Accessory Bus (keeps radio and windows powered for an extra 10 min or until a door opens) that said, for most things, no it is not needed, but for other stuff I would recommend it. __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978

10-27-2014	#3
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: 90 vs. 91 FSM? Thanks, Jeff. I (and Santa) will keep an eye out for a set! Hers has a few user mods already; secondary delete, coil-overs, radio (kaput - have replacement = why I ask about the FSM). Paul.