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Traction Control for my 81 EFI

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Old Aug 7, 2019 | 04:02 PM
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Default Traction Control for my 81 EFI

Now that my daily driver 81 is injected I am thinking about adding some power to it but it is a daily all weather driver. Has anybody managed to adapt or add a traction control system to their c3 / c4 aftermarket or other wise? I am thinking of doing an L98 build which makes a lot of torque, turning left and it is wet out and oops is something I would like to avoid, currently not a problem with my 150hp L81 with 400k on it. Racelogic sold a system that cut the injectors but that have discontinued that for some reason.
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Old Aug 7, 2019 | 05:19 PM
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Wow. I just ease my foot off the accelerator. I also do not stab the gas when it's wet. In fact, I rarely drive my Corvette when it's raining or wet...
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Old Aug 7, 2019 | 05:27 PM
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Traction control starts with abs and gets waay more involved from there. Anything can be done, but putting a C3 body on a C5 wouldn't be a hell of a lot more work...
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Old Aug 7, 2019 | 06:18 PM
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I installed the following in my head;

Incipient oversteer
Trailing throttle braking
Understanding of polar moment of inertia
Anti- squat and anti dive knowledge
Heel and toe
ABS...a big shoe.
Contact patch management

I HATE NANNIES.

unkahal
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Old Aug 7, 2019 | 06:36 PM
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https://moretraction.com/product/efi-tc2/

If you update to a Holley Dominator EFI ecu then this can work.
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Old Aug 7, 2019 | 07:42 PM
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Nelson Crozier used to "assist" with traction control ...
... suggest having your ducks in a row before you have a conversation

http://www.nelsonspecialties.com/
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Old Aug 7, 2019 | 10:42 PM
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One of the reasons I drive a C3 is that it doesn't have traction control, anti-lock brakes or any of that other crap that they put on cars for people who don't know how to drive.
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Old Aug 7, 2019 | 11:49 PM
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The best traction control in the whole world is tires.

You need to install 18 inch wheels with the best all weather maximum performance tires.

Then until you exceed 600 hp you will hardly ever need to slow down even in pouring down rain.

Cheap old heat cycled 15 inch tires is easy to loop
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Old Aug 8, 2019 | 09:17 AM
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Good tires are a far cheaper alternative, in my opinion. I alternate between my '80 C3 and an '02 BMW Z3M Coupe, and the modern summer tires (Michelin Pilot Super Sports) on my Z3M have amazing grip rain or shine. First thing I do every time I get in that car is turn off traction control, no matter what. It takes a lot of beans to spin those tires even in the wet, so my casual driving habits don't really change when driving that car dry or wet. My C3, on the other hand, is still running Mickey Thompson Sportsman S/Ts which are okay on dry pavement, but holy hell are they bad in the rain. I pay waaaay more attention to my throttle and brake inputs with that car in the wet. It's terrifyingly fun, but it really shows how good modern performance rubber is compared to the typical hard, cheap, crap rubber available for 15" wheels.
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Old Aug 8, 2019 | 09:31 AM
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Originally Posted by gkull
The best traction control in the whole world is tires.

You need to install 18 inch wheels with the best all weather maximum performance tires.

Then until you exceed 600 hp you will hardly ever need to slow down even in pouring down rain.

Cheap old heat cycled 15 inch tires is easy to loop
I agree...

I put my '85, non-nannie equipped, 8,000 mile, 4+3, Corvette in storage for 9 years back in the early 90's. When I finally put it back on the road I only needed to replace the battery, the fuel pump, and rebuild the clutch slave cylinder. I also discovered that the 8,000 mile, original Gatorbacks had plenty of tread and pretty good grip... on a dry road!. With the least bit of moisture on the road (early morning dew was enough) the car would lose traction quickly and easily if I wasn't very careful when applying power.

I decided to replace the tires and purchased new Goodyear GS-D3's (never understood why Goodyear gave up on them) and the car was once again a pleasure to drive and the only way to lose traction was to take deliberate action. All it took was a new set of excellent tires to restore its outstanding handling characteristics.

Good luck, and never cheap out on tires...

GUSTO
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Old Aug 8, 2019 | 03:25 PM
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Seriously, you want to equip a C3 with computer controlled 4 wheel traction control...so you can drive it hard IN THE RAIN?????? really?
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Old Aug 8, 2019 | 03:40 PM
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THANKS FOR YOUR REPLIES, I AM GOING TO SEE IF I CAN FIND A RACELOGIC Traction Control SYSTEM USED SO I CAN HAVE L98 low end torque and still drive in the rain.
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Old Aug 8, 2019 | 04:06 PM
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mystingray1:

Traction and stability controls are essentially "extensions" of anti-lock brakes. The key to anti-lock brakes are the extremely accurate and exceptionally reliable wheel rotation sensors that to my knowledge are always integral to hub/bearing assemblies.

Your incredible difficulty will be getting rotation sensors for the trailing arm mounted rear wheel bearings.
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Old Aug 8, 2019 | 05:44 PM
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Perhaps most of serial production OE traction control do utilize vehicle brake system (I have several vehicles which do) ... but ...
... there are Many stand-alone aftermarket TC systems which do Not ... primarily for real race cars ...
... driven by real race car drivers ... both asphalt & dirt ... drag, oval, roadrace.

FWIW ... Some race TC are hidden within tachometer or CD box etc where series rules prohibit TC.
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Old Aug 8, 2019 | 06:29 PM
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Dude- traction control is in your feet. Take a skdschool/driving course instead.

My C3 is going the other way. Manual brakes, manual steering, non-hydraulic clutch.

(Manual windows too, for that matter).
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Old Aug 8, 2019 | 07:33 PM
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You can buy aftermarket traction control units, but they're pretty spendy. I'd suggest some driver training on a wet skidpan and some good modern tyres as suggested by others. I have 500+hp and drive mine daily. If you have decent power then you can break the tyres loose in the dry too... Better to learn how to handle it, and to fit tyres that allow enough traction that it's not a problem unless you're driving the car hard anyway.
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Old Aug 8, 2019 | 07:40 PM
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You are chasing a pipe dream in a C3. And YES, traction control is your foot on a C3 with high torque and a positrack rear end! It's freaking SCARY when you first spin out typically when making a fast turn into traffic from a standstill with a touch of rain on the road after a long dry spell.

Here's one of the so-called "traction control systems" that you are probably referring to: http://www.racelogic.co.uk/index.php...action-control

Notice that it BEGINS with speed sensors on ALL FOUR WHEELS! Again an ACCURATE and RELIABLE wheel speed sensor for the driven (rear) wheels with the C3 trailing arm suspension will be extraordinarily difficult. Forget the fact that it's been discontinued (due to being useless?). Also it is NOT the sort of traction control that's been available on production cars for nearly two decades now! All it does is cut engine power by turning off injectors when it senses a slip. Can you say, "Ease up on the gas pedal?"

Do you have a fuel injector for EACH cylinder? If not the idea of traction control via the above is utterly useless. This is beyond what I believe is an extremely poor traction control system that does not integrate with the braking system.

I'm sure there are traction control systems that can independently vary torque to the driving wheels (even if all four can be driven) but that will NEVER happen with the C3 drivetrain! Even then I can utterly guarantee that sort of system HINGES on an accurate and extremely reliable wheel speed sensors!
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Old Aug 9, 2019 | 12:04 AM
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Hey! Drive a C3 in snow and ICE for a while. You'll get the hang of it.
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Old Aug 12, 2019 | 03:07 PM
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thanks for the input
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