ABS on 308? - Ferrari Life
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post #1 of 46 Old 09-19-2013, 12:09 PM Thread Starter
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ABS on 308?

I've been kicking around putting an ABS system on the 208 turbo, has anyone done this yet? Seems like it would be pretty straight forward, 4 sensors and a control ECU and pump. Sure would make tract days fun and a great safety feature.

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post #2 of 46 Old 09-19-2013, 12:41 PM
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Jack, whats going on? You bored and got nothing else to do?


What about your garden?? That needs love too you know.

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post #3 of 46 Old 09-19-2013, 12:43 PM
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Jack- You probably could adapt the system from the late 328, but there is probably a simpler way to do it. You also need a missing tooth wheel or something similar for the sensor. On the later cars, that wheel is in the hub/wheel bearing.

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post #4 of 46 Old 09-19-2013, 01:36 PM Thread Starter
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No Chris I'm servicing all our cars (daily drivers) and while under the car see systems that I think would be great on old cars like we have. You haven't figured out yet I like to make things.

Taz your right about the late model 328s would be a shoe in but the systems on late model cars (any cars not just Ferrari) are smaller and better. Mounting the trigger wheels would be the challenge but making them is right up my alley, I have a waterjet. If we could figure out how to do "fly by wire" then we could have traction control too.

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post #5 of 46 Old 09-19-2013, 09:29 PM
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Jack- You do not need a digital throttle for ASR. The ABS signals can be used for that, like they do on the 550. Admittedly it is smoother with a digital throttle, but still works with analog. But then you need an ABS/ASR ECU to integrate throttle modulation and braking. Harder to do with carbs.

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post #6 of 46 Old 09-20-2013, 03:24 AM Thread Starter
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Taz I am amazed how inexpensive the ASR ABS computers are used. $100 or less on ebay. I even found a motor that would work with my individual throttle bodies. My head is buzzing with ideas.

Mercedes R129 SL 500SL ASR Drive 0005401417 | eBay

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post #7 of 46 Old 09-20-2013, 04:58 AM
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Quote:
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If we could figure out how to do "fly by wire" then we could have traction control too.
you've come to the right place then
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post #8 of 46 Old 09-20-2013, 11:24 AM
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The only value ABS gives you on a track is a warning shot that you're at the threshold, you won't ever actually USE ABS. The problem then become that you're longer feeling the car it's self, but relying on that system to tell you what is going on. In my opinion, boost limiting traction control could be of more value, depending on how well your car hooks up around the corners.


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post #9 of 46 Old 09-20-2013, 11:49 AM
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You may also want to be mindful of the fact that car which do come with ABS for track use, run different programming than street cars. If you put a street system in a track car with slicks, you probably won't be pleased with the response. You'll also need to make sure that your rolling diameters for the tires are compatible with the ABS programming. On newer cars with giant, mismatched wheels, the ABS system freaks out thinking there is constantly a problem.


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post #10 of 46 Old 09-20-2013, 12:13 PM Thread Starter
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You may also want to be mindful of the fact that car which do come with ABS for track use, run different programming than street cars. If you put a street system in a track car with slicks, you probably won't be pleased with the response. You'll also need to make sure that your rolling diameters for the tires are compatible with the ABS programming. On newer cars with giant, mismatched wheels, the ABS system freaks out thinking there is constantly a problem.

Great advice! I totally forgot about the different diameter of the tires, this is a major issue as tooth count must match the rotational speed. I had put a slightly smaller rear tire on my NSX once and it the ABS and traction control wouldn't function till the correct size tire was put on. I wouldn't be putting slicks on this car but thats also something to consider.

Thanks!

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post #11 of 46 Old 09-20-2013, 12:36 PM
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Jack, Josh- The ABS does not really care about the diameter of the tires as much as it does the differential front to rear compared to what it was originally programmed to handle. On street Ferraris, at least, that critical point seems to come around 4-5% difference from OEM differential front to rear. As long as the F to R differential is maintained, ABS is happy.

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post #12 of 46 Old 09-20-2013, 03:11 PM
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Thanks Terry, I suppose my comment was a bit too general in wording.


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post #13 of 46 Old 09-20-2013, 03:13 PM
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Josh- I figured you already knew that, but you know how pedantic I am.

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post #14 of 46 Old 09-20-2013, 10:26 PM
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There is great value in that Terry, not much use in spreading additional cryptic or plain mis-information.


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post #15 of 46 Old 11-30-2013, 03:21 AM
 
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Originally Posted by ECSofVirginia View Post
The only value ABS gives you on a track is a warning shot that you're at the threshold, you won't ever actually USE ABS. The problem then become that you're longer feeling the car it's self, but relying on that system to tell you what is going on. In my opinion, boost limiting traction control could be of more value, depending on how well your car hooks up around the corners.
a modern ABS system gives you a ginormous benefits... you can trail break much deeper in the corners especially helpful in a rear weight bias platform.
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post #16 of 46 Old 03-01-2014, 09:03 AM
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Personally I think ABS is a vastly overrated PITA. Fussy, and requires maintenance (and time & $$$). Better to learn how to brake correctly, IMO. Do you have any track time, or time on a skidpad? If not give it some thought; in the long run would probably serve you better than a garage-built ABS system which may or may not work correctly (if at all) and would certainly cost a fair amount, by the time it's fitted and adjusted. Do you really want to be a test driver, taking the chances with your own car at speed, where the ABS might be of use...if it really works? And if it fails when truly needed....?


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Last edited by Rich S; 03-01-2014 at 09:04 AM. Reason: typo
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post #17 of 46 Old 03-01-2014, 10:53 AM
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I would think twice about it, respectfully.

A 308 is pure and precise, it would be a little like buying a piano and turn it into a Hammond.

Perhaps if you get one more 308 and have one to experiment on and another to keep pure?

Or get a late 328 which has ABS as stock?

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post #18 of 46 Old 03-01-2014, 02:38 PM Thread Starter
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I would think twice about it, respectfully.

A 308 is pure and precise, it would be a little like buying a piano and turn it into a Hammond.

Perhaps if you get one more 308 and have one to experiment on and another to keep pure?

Or get a late 328 which has ABS as stock?
I have 4 now, how many do you need?

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post #19 of 46 Old 03-01-2014, 03:01 PM
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I have 4 now, how many do you need?
Haha

Then I guess you should go wild!

I'd love to own four 308s! I own one and that's a start...

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post #20 of 46 Old 03-01-2014, 10:22 PM
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Rich- Every F1 car used ABS right up until they banned it. It helped even the best drivers in the world.

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