Modifying 1989 programming
Thread Starter
Le Mans Master
Joined: Jul 1999
Posts: 5,005
Likes: 38
From: jackson nj
Modifying 1989 programming
I'd like to have some programming changes made to my 89 Vette to enhance it's drag racing performance. In the past what I've always done is buy a spare PCM/ECM and had that done, but with this year using the replaceable PROM can I just buy a spare PROM and if so, where can I get one?
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
instead of using stock OEM memcals I use the gp-1 adapter w/zif socket and the '512' chips from here:
http://www.moates.net/index.php?cPath=26
Most tuners are familiar w/these parts and can accomodate using them, and have advantages when tuning, using emulaters etc.
http://www.moates.net/index.php?cPath=26
Most tuners are familiar w/these parts and can accomodate using them, and have advantages when tuning, using emulaters etc.
Advanced
Joined: Feb 2009
Posts: 74
Likes: 0
From: Acworth Georgia
MSEVEN
Can these things be used on stock 89 for street use? I need to adjust fuel delivery. I've changed every sensor and installed new Bosch IIIs from FIC and still have rich condition. Car smells like an old truck with the choke stuck. Even has soot on the rear valance. Only getting around 13 mpg.
Can these things be used on stock 89 for street use? I need to adjust fuel delivery. I've changed every sensor and installed new Bosch IIIs from FIC and still have rich condition. Car smells like an old truck with the choke stuck. Even has soot on the rear valance. Only getting around 13 mpg.
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
MSEVEN
Can these things be used on stock 89 for street use? I need to adjust fuel delivery. I've changed every sensor and installed new Bosch IIIs from FIC and still have rich condition. Car smells like an old truck with the choke stuck. Even has soot on the rear valance. Only getting around 13 mpg.
Can these things be used on stock 89 for street use? I need to adjust fuel delivery. I've changed every sensor and installed new Bosch IIIs from FIC and still have rich condition. Car smells like an old truck with the choke stuck. Even has soot on the rear valance. Only getting around 13 mpg.
Moates does sell all the needed cables, hardware and software packages to allow for actually tuning it yourself (less a laptop/comp.). And yes, "bin stacking" and switching is also available.
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
Bin stacking is neat for trying out different pre-guessed calibrations at the track.
I don't know if I'd bother with a 'street' vs 'race' tune. Since I shoot for stoich everywhere, it shouldn't matter. My WOT AFR will be the same regardless if I'm merging on the highway or trying to beat the the guy in the next lane at the local track.
I can't really think of anything I'd make different on the street vs the track in regards to the tune ??
-- Joe
I don't know if I'd bother with a 'street' vs 'race' tune. Since I shoot for stoich everywhere, it shouldn't matter. My WOT AFR will be the same regardless if I'm merging on the highway or trying to beat the the guy in the next lane at the local track.
I can't really think of anything I'd make different on the street vs the track in regards to the tune ??
-- Joe
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Joe, I agree w/you, and for the most part my logic is the same.
I think if I were real serious w/it as a track car I can see taking a little off it, or possibly adding depending on bite/launch to help wheel spin, or because of really hooking good after heating the tire . In general maybe just working the launch rpm area more, and possibly changes for the big end as well. I personaly never get the chance to do that on the street.
Mick
I think if I were real serious w/it as a track car I can see taking a little off it, or possibly adding depending on bite/launch to help wheel spin, or because of really hooking good after heating the tire . In general maybe just working the launch rpm area more, and possibly changes for the big end as well. I personaly never get the chance to do that on the street.
Mick
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
Joe, I agree w/you, and for the most part my logic is the same.
I think if I were real serious w/it as a track car I can see taking a little off it, or possibly adding depending on bite/launch to help wheel spin, or because of really hooking good after heating the tire . In general maybe just working the launch rpm area more, and possibly changes for the big end as well. I personaly never get the chance to do that on the street.
Mick
I think if I were real serious w/it as a track car I can see taking a little off it, or possibly adding depending on bite/launch to help wheel spin, or because of really hooking good after heating the tire . In general maybe just working the launch rpm area more, and possibly changes for the big end as well. I personaly never get the chance to do that on the street.
Mick
I've got a little rich tip in stumble right now that aides traction leaving a light. I need to fix that soon before I ruin the clutch feathering around it.
-- Joe
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Safety Car
Joined: Sep 2001
Posts: 4,137
Likes: 531
From: Glenbeulah Wi
Bin stacking is neat for trying out different pre-guessed calibrations at the track.
I don't know if I'd bother with a 'street' vs 'race' tune. Since I shoot for stoich everywhere, it shouldn't matter. My WOT AFR will be the same regardless if I'm merging on the highway or trying to beat the the guy in the next lane at the local track.
I can't really think of anything I'd make different on the street vs the track in regards to the tune ??
-- Joe
I don't know if I'd bother with a 'street' vs 'race' tune. Since I shoot for stoich everywhere, it shouldn't matter. My WOT AFR will be the same regardless if I'm merging on the highway or trying to beat the the guy in the next lane at the local track.
I can't really think of anything I'd make different on the street vs the track in regards to the tune ??
-- Joe
If you have a high compression engine and you run 93 octane fuel you may have to be a little conservitive on the timing to stay out of detonation. If you go to the track and decide to run 100 octane unleaded you can have a more aggressive timing curve that may pull harder. If the engine does not have an detonation on 93 fuel with aggressive timing then you would not need two tunes.
On my car I have 16 different tunes in one chip so I can run tunes from 93 octane fuel to E85 and anywhere in between. I use my WB O2 sensor to determine what tune to use when i am playing with E85 or some combination of E85 and 93 octane fuel.
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
Joe,
If you have a high compression engine and you run 93 octane fuel you may have to be a little conservitive on the timing to stay out of detonation. If you go to the track and decide to run 100 octane unleaded you can have a more aggressive timing curve that may pull harder. If the engine does not have an detonation on 93 fuel with aggressive timing then you would not need two tunes.
On my car I have 16 different tunes in one chip so I can run tunes from 93 octane fuel to E85 and anywhere in between. I use my WB O2 sensor to determine what tune to use when i am playing with E85 or some combination of E85 and 93 octane fuel.
If you have a high compression engine and you run 93 octane fuel you may have to be a little conservitive on the timing to stay out of detonation. If you go to the track and decide to run 100 octane unleaded you can have a more aggressive timing curve that may pull harder. If the engine does not have an detonation on 93 fuel with aggressive timing then you would not need two tunes.
On my car I have 16 different tunes in one chip so I can run tunes from 93 octane fuel to E85 and anywhere in between. I use my WB O2 sensor to determine what tune to use when i am playing with E85 or some combination of E85 and 93 octane fuel.
I used to do that. Years ago, I'd run up to the track with like a 1/4 tank and fill with 103. Problem was it wasn't really consistent. While yeah, I run a little more advance with the higher octane blend
I like tuning, but when I get to the track I'd rather just run the car. Nice for experimenting but I've found it easier to just tune for street fuel.
If E85 comes to this area however, I'll retune for E85 exclusively.
Alky is interesting stuff though. Talking to my long time machinest, he did a lot of experimenting with alky cars in the 70s. He found that while alky has some wonderful anti detonation properties and runs very cool, adding more advance doesn't seem to make the car run any faster. Although, the alky will allow a lot more boost and or higher compression ratio..
-- Joe
