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#1 |
![]() ![]() Join Date: Aug 2005
Location: Northridge, CA
Posts: 1,457
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On the Corvette Central website I saw an ad for C4 EPROMS/MEMCALS.
I took a look. They said: "* Originally not designed to last over 5 years, as a result Corvettes equiped (sp) with eproms need to be replaced or flashed every 5 years to maintain peek (sp) performance. * Eproms are newly reflashed OEM parts. The software contains the latest upgrades that are available including running changes. Most GM ECMs used until 1995 have an Erasable Programmable Read Only Memory (EPROM) that stores data about the C4 Corvette engine it controls and does not lose its content when the power supply is cut off. EPROMs also contain information specific to the transmission and the car. The EPROM is often referred to as the "chip". The chip is sometimes located in a removable carrier called a MemCal or Calpack. These are rebuilt factory prom chips that include the memcal. Programmed with the most up to date program that was released from GM. An $80.00 core charge is added and will be refunded when the original prom/memcal is returned." I have never heard of replacing EPROMs every 5 years. What say you?
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1995 ZR-1 #106 Blk/ Blk Owned by me since 2000. 93K miles, but not on motor :-) Mods the way I want it, Not afraid to drive it! Last edited by GOLDCYLON; 02-01-2022 at 12:11 AM. |
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#2 |
![]() Join Date: May 2010
Location: Japan
Posts: 3,571
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Ted,
This is the first I am hearing about this 5 year expiration. They can?t be that desperate to try to get people to buy new EPROMs every 5 years? Sent from my iPhone using ZR-1 Net Registry
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Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 ![]() |
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#3 |
![]() Join Date: Jan 2021
Location: Beautiful Bavaria
Posts: 523
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Also for me This is the first time I hear that.
However, a few years ago I had the transmission fluid of one of my Audis changed by the transmission manufacturer. They also said they would erase (or better: reset) the control unit so that the transmission can "learn" all parameters of my driving from the scratch, thereby removing anything that's potentially hindering the overall transmission performance. Long story short: the effect was very well noticeable, shifts were mainly smoother and better timed than before. Maybe there's something similar related to the chip, so that it accumulates more and more information that hamper performance? Just a theory, though... Sent from my SM-G991B using ZR-1 Net Registry mobile app
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ZR-1 #638/1991 |
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#4 | |
![]() Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,153
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![]() Quote:
As for the EPROM needing to be reflashed every 5 years is kind of funny. I would say it is marketing at its finest.
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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#5 |
![]() Join Date: Mar 2018
Location: Misery
Posts: 79
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Yeah this sounds like BS marketing. I know it's not a ZR-1, but I've got an '87 Mazda RX-7 ECU with over 230k miles on it that still works like it was new.
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#6 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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#7 | |
![]() Join Date: Aug 2012
Location: Ellicott City, MD
Posts: 1,671
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Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa |
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#8 |
![]() Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,153
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Please get and post some pictures of the displays for your cars at the show
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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#9 | |
![]() Join Date: Aug 2012
Location: Ellicott City, MD
Posts: 1,671
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They had the new 2023 ZO6 convertible on display as well as many exotics.
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Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa |
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#10 |
![]() ![]() ![]() Join Date: May 2007
Location: Peoria, AZ
Posts: 9,154
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Snake oil... just like the Desert protection package out her in Arizona. You know mop and glo.
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director ![]() 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V |
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