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05-24-2021
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#11 |
 
Join Date: Sep 2016
Location: Ocala, FL
Posts: 896
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Re: Newbie Question on Power
Hmm. If the car has Marcs chip why is the OP messing with the key? Chip keeps it on full power mode all the time. BTW I know where there is an NOS power switch if needed.
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Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much. |
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05-25-2021
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#12 |
 Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,542
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Re: Newbie Question on Power
Key override is an option with Marc's programming, it's not a given.
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05-25-2021
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#13 |
Join Date: Jan 2009
Location: New jersey
Posts: 153
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Re: Newbie Question on Power
I second that. there is a code/number Marc puts on his chips, if you call and tell him what it is, he can tell you exactly what he programed into it....
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05-25-2021
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#14 | |
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Join Date: Jul 2020
Location: Oswego, IL
Posts: 85
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Re: Newbie Question on Power
Quote:
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05-25-2021
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#15 |
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Join Date: Sep 2016
Location: Ocala, FL
Posts: 896
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Re: Newbie Question on Power
My 91 Marc chip is default power on so that is my reference. I was unaware of the different 90 configuration.
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Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much. |
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05-26-2021
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#16 |
 
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,466
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Re: Newbie Question on Power
After removing my SPT throttle plates and Marc reprogrammed my 90 to run on the secondaries full time, he warned me of the fact those 1990 FULL POWER switches were known to become intermittent and if it opens unexpectedly (or intentionally for that matter) half of the fueling (the secondary injectors) would shut off* resulting in a serious lean condition which could result in knock in the least, or worse (as I was to find out later!).
*in secondaries ON mode, the fueling (injector dwell time) is split between the primary and secondary injectors. With the full time modification, if the FULL POWER mode is not working, the result is to shut the secondary injectors OFF - running on the primary injectors only - BUT w/o increasing the dwell to replace the fuel from the secondaries. That is a BAD thing! And, as it happened, I noticed my "FULL ENGINE POWER" light was intermittent due to the funky POWER switch, and later what seemed like a miss on one cylinder. A compression check showed a serious lack of compression on one cylinder which ended up the result of a burnt valve (after pulling the engine - and all of the ramifications that entailed - to get to the valve). Never wanting to have an issue with that switch again, I hardwired the wires together which assures the FULL POWER mode is always on - far as the switch is concerned (at least). Pete Polatsidis (co-member of the "FBI" (Fast Boyz of Illinoiz - Chicagoland ZR-1 group) replaced the valve after I took the opportunity to finish my porting project and port the heads (that after also fashioning a metal sleeve to insert inside that accordion hose (between the air filter and the intake horn). That was back in 2011-12 and the results transformed the Z into a different beast and runs making 432 HP at the wheels before the last bit of porting. That's over 100hp increase on stock cams and NO difference in idle or low speed manners! I highly recommend Marc's "510" package!! |
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Linear Mode
