81 pros and cons
Thread Starter
Pro
Joined: Jun 2004
Posts: 534
Likes: 0
From: Duncan South Carolina
St. Jude Donor '10
81 pros and cons
My question is what are the pros and cons about disconnecting the computer on my 81? If I do disconnect the computer, what will I need to change?
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
There is a Lot that has to be done to dump the computer system: Carb change, dist change, rework the TCC lockup system, etc...
First off, why do you want to do this? You can easily do some regular mods (heads, headers, intake, cam etc) and get 300 ~ 350 out of that car WITH the ECM in place
There is nothing wrong with the stock dist and that is a 650 cfm carb
First off, why do you want to do this? You can easily do some regular mods (heads, headers, intake, cam etc) and get 300 ~ 350 out of that car WITH the ECM in place
There is nothing wrong with the stock dist and that is a 650 cfm carb
Race Director
Joined: Jul 2004
Posts: 12,694
Likes: 329
From: Scottsdale Arizona
There is a Lot that has to be done to dump the computer system: Carb change, dist change, rework the TCC lockup system, etc...
First off, why do you want to do this? You can easily do some regular mods (heads, headers, intake, cam etc) and get 300 ~ 350 out of that car WITH the ECM in place
There is nothing wrong with the stock dist and that is a 650 cfm carb
First off, why do you want to do this? You can easily do some regular mods (heads, headers, intake, cam etc) and get 300 ~ 350 out of that car WITH the ECM in place
There is nothing wrong with the stock dist and that is a 650 cfm carb
AlmostI think that the carb is larger than 650 cfm. If everything is working right, the CCC system performs very well.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
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
Melting Slicks
Joined: Mar 2006
Posts: 2,465
Likes: 0
From: Orange Park Fl
I have it and am not sure it made much difference. UKPaul has one in his and says it made a difference in low end torque with other engine mods he made. Overall, it is probably not that important, but for $120, it doesn't hurt. God bless, Sensei
Safety Car
Joined: May 2001
Posts: 3,758
Likes: 3
From: Surrey
As Sensie said. It gave mine a bit more throttle response & torque at low rpms, couldn't say if it improved performance higher up as I think a dyno would be needed to show it. I'm glad I fitted it but, from reading previous posts on here, it doesn't seem to do a lot if the engine is stock. Whatever you do, DON'T fit a 160 stat if you get a chip (or even if you don't!). This can make the engine run so much cooler that the computer thinks it hasn't warmed up & you'll be chasing all sorts of "problems".
Burning Brakes
Joined: Feb 2005
Posts: 847
Likes: 4
From: Atlanta
I have the Hypertech chip in my stock 82. I've put it in and taken it out a couple of times. They claim it only has an impact at WOT but I'm not sure. Car seems to have less 'soot' for first few minutes of cold startup WITH the chip but nothing major. Biggest diff I notice is WITH the chip I sometimes get a little bit of valve chatter when stepping on the throttle. They say to run Premium Unleaded (well, I believe they say 92 octane or higher.....I've used octane additives as well).
For just normal driving, cruising probably makes no difference but I decided to leave mine in.
M
For just normal driving, cruising probably makes no difference but I decided to leave mine in.
M
Thread Starter
Pro
Joined: Jun 2004
Posts: 534
Likes: 0
From: Duncan South Carolina
St. Jude Donor '10
Thanks everyone! I think I will just leave it stock for now. It's my wife's car and she's just happy that she gets more compliments on her C3 than I do on my C4. Oh well. Thanks again for your input.
Burning Brakes
Joined: Jan 2006
Posts: 1,154
Likes: 1
From: St Augustine FL
I have the Hypertech chip in my stock 82. I've put it in and taken it out a couple of times. They claim it only has an impact at WOT but I'm not sure. Car seems to have less 'soot' for first few minutes of cold startup WITH the chip but nothing major. Biggest diff I notice is WITH the chip I sometimes get a little bit of valve chatter when stepping on the throttle. They say to run Premium Unleaded (well, I believe they say 92 octane or higher.....I've used octane additives as well).
For just normal driving, cruising probably makes no difference but I decided to leave mine in.
M
For just normal driving, cruising probably makes no difference but I decided to leave mine in.
M
I have the hyperchip in my mostly stock 82 and there is very little noticeable differance. The car shifts at higher RPM and shifts stronger and has a bit better throttle response but that is about it.
Advanced
Joined: Oct 2001
Posts: 65
Likes: 0
From: Moerstraten NL
I have the hyperchip in my mostly stock 82 and there is very little noticeable differance. The car shifts at higher RPM and shifts stronger and has a bit better throttle response but that is about it.
Greetings Peter.
Burning Brakes
Joined: Jan 2006
Posts: 1,154
Likes: 1
From: St Augustine FL
Im just saying the differance that I noticed once I change the chip. Thats all. and the car seemed to shift at a higher RPM and bang harder when shifting.
