I’m not a naysayer of ABS being a possibility. The problem with the Cobalt and newer systems is the addition of the traction control in its many forms. These newer systems utilize accelerometers to detect changes in yaw axis, braking and acceleration and they are calibrated specifically down to wheel size. They work phenomenal; if you have ever driven on snow or ice and seen it in action then you can relate.
A very basic, primitive ABS system that simply detects wheel lockup and then begins modulating to avoid skid could be ideal; even if its just for the rear wheels. May even save you on a late braking incident going into a corner.
I’m not too motivated to persue any of this, as I’ll be happy just to see the day I get my frame powdercoated at this point.
Saw that one Jaret, as pointed out by Brad earlier - my comment about big $$$.
ABS would be a great addition to the Goblin, but the info from Lonnie appears to rule out trying to use it based on the interaction with the throttle control. Agree with Brian that even having rear wheel ABS, as found in many pickup trucks from the late 1980s, would be great - just not sure how this could be accomplished.
Pick up trucks from the late 80’s was exactly what I was thinking about in that example, lol. Would need rear wheel speed sensors and programming that would communicate to an ABS actuator based on wheel speed sensor frequency threshold value.
If I remember correctly, the ABS controller was a separate module on these trucks (GM) - I had a couple trucks back then and recall having a faulty controller replaced. A quick look at eBay for truck rear ABS controller comes up with several. This may need to have some further research to determine if it can be a stand alone and what sensor inputs are needed to make it work.
The thing you have to realize (I know you’re an engineer) is do not over engineer this car, yet. The horesepower/torque to weight ratio already puts it at a HUGE advantage at the track... Literally on par with Ferarri. There are guys out there destroying other cars at the track with Goblins in stock form. That alone makes much of the other issues rather moot.
You have a great start. New engine & trans. Once you get into the actual build, you are going to find unmeasurable processes and speedbumps to get it built (especially if you are a perfectionist like me). I’ve been in this for nearly 2 years. I have a solid plan as of now. I could go further into the plan, but I am at the point where, at the same time I want to enjoy the car I envisioned. If I keep brainstorming ideas, it is only the longer I’ll be away from finishing the build & drving the car and coming up with even better ideas later that will evolve from actually drving the car and really seeing what improvements will work for me.
I agree withh Brian. Until you have the car built, you won't really know what you will want improve upon and make better. Locking up the brakes on this car not is not major problem. These things tend to stop on a dime! I remember one of the others members talking about how other drivers would darn near rear end the Golbin on the track because he would stop so fast going into a turn.
The cars are also very easy to work on and modify if you do decide you need to change things. Sure, customize along the way, but I would at least experience the car before re-engineering it.
Brian and Chad, thanks for your advice and a dose of reality. Sometimes chasing an idea down the rabbit hole is a healthy mental exercise, but as you point out, may not have much relevance in the real world application.
Having rode in Rich's (RichRich) purple Goblin I experienced first hand the brutally quick stopping ability of the car with the 'stock' brakes. I did notice that during hard braking with maneuvering a wheel would tend to lock up - not dangerously as it was only a single wheel. The engineer in me asked how it could be made better and I started looking at the forum for ABS threads.
Since I have some time before I will be getting a full blown build, I will continue to look into this and post any new findings that may be relevant to the ABS thread. Appreciate your candid input and I'm fairly certain some new ideas may be forthcoming. It's all good stuff.