11-1-11 OGTA meeting pics and video
11-04-11, 10:51 AM
#27
You would think so. But what I've noticed over the years is that on all four of my 84/85 GSLs, the X wheels were almost always in perfect alignment, on both sides!
So I did a little research and I discovered that the Mazda engineers had installed a seldom heard of option in 84/85 on the GSLs, which they called the "Oscillating Compensatory Deregulator", or OCD.
The OCD is a device that reads the rotational positions of the X wheels (the Oscillator) and couples this data to an onboard computer that processes the information for all four wheels simultaneously (the Compensator) and feeds signals to the brake calipers (the Deregulator) to gently and occasionally provide just enough braking to each individual X wheel to keep it in line with the others. The effect is so subtle that you can't notice it when you're driving, but it works pretty well. Unless you've hit a pot hole or done some really aggressive driving lately, the wheels will be lined up each time you park the car.
I have dozens of photos to prove the point and it's not hard to observe on other 84/85 GSLs once you start to notice.
Pretty clever, eh?
So I did a little research and I discovered that the Mazda engineers had installed a seldom heard of option in 84/85 on the GSLs, which they called the "Oscillating Compensatory Deregulator", or OCD.
The OCD is a device that reads the rotational positions of the X wheels (the Oscillator) and couples this data to an onboard computer that processes the information for all four wheels simultaneously (the Compensator) and feeds signals to the brake calipers (the Deregulator) to gently and occasionally provide just enough braking to each individual X wheel to keep it in line with the others. The effect is so subtle that you can't notice it when you're driving, but it works pretty well. Unless you've hit a pot hole or done some really aggressive driving lately, the wheels will be lined up each time you park the car.
I have dozens of photos to prove the point and it's not hard to observe on other 84/85 GSLs once you start to notice.
Pretty clever, eh?
11-04-11, 03:23 PM
#28
Well put DF, well put.
Yep those two SA's are unbelievable, the photos don't do them justice. Both are built by guys who not only are top notch mechanics, they know and love rotaries, especially SA's.
I think both the white one and the blue one have dual webers, but I'm a Nikki guy, I wouldn't know a weber from a del Horto.
Robert, the owner of the white one, bought his new in 1979, when "his hair was down to his shoulders" as he put it.
He builds his own motors and does his own paint jobs and there isn't a detail on that car that hasn't received his loving attention.
I didn't take a ride, but you know that bridgeported custom 13B he's got in there underneath the dual webers is a rocket.
And Gene, the guy on the right, just keeps pumping out one incredible project after another. The blue SA just rolled out of the garage last month.
Gene also builds his own motors and paints his own cars. Here's another one of his toys. Gene is all about acceleration:
And here's his new project, just picked up a couple weeks ago:
We'll keep you posted on his progress.
Yep those two SA's are unbelievable, the photos don't do them justice. Both are built by guys who not only are top notch mechanics, they know and love rotaries, especially SA's.
I think both the white one and the blue one have dual webers, but I'm a Nikki guy, I wouldn't know a weber from a del Horto.
Robert, the owner of the white one, bought his new in 1979, when "his hair was down to his shoulders" as he put it.
He builds his own motors and does his own paint jobs and there isn't a detail on that car that hasn't received his loving attention.
I didn't take a ride, but you know that bridgeported custom 13B he's got in there underneath the dual webers is a rocket.
And Gene, the guy on the right, just keeps pumping out one incredible project after another. The blue SA just rolled out of the garage last month.
Gene also builds his own motors and paints his own cars. Here's another one of his toys. Gene is all about acceleration:
And here's his new project, just picked up a couple weeks ago:
We'll keep you posted on his progress.
11-05-11, 03:40 PM
#31
That's right DD. Because by the time the light from the clock reaches your eye, that image of the clock is already a little bit behind time - it's wrong.
I think DF is thinking in conventional terms. But conventional terms fail to explain why the X wheels on 84/85 GSLs are almost always in perfect alignment. I tell you, it's the OCD.
That pcv valve on the oil cap? Just another example of how us OGTA's think outside the box.
I think DF is thinking in conventional terms. But conventional terms fail to explain why the X wheels on 84/85 GSLs are almost always in perfect alignment. I tell you, it's the OCD.
That pcv valve on the oil cap? Just another example of how us OGTA's think outside the box.
11-05-11, 07:40 PM
#33
DF, check this out. I'm out jumping the Jeep this evening because I need the Jeep to put my 24' ladder on the rear deck to reach the 30' part of the house that needs siding.
I take a look at the X wheels on the Silver One, which has just spent a week out on I85 doing the commute. Hard to believe, but they're all lined up.
So I get out the camera. Here's the random X wheel alignment on the Silver One this evening. I'm telling you, it's the OCD:
http://youtu.be/tOvCXgLbxwc
I take a look at the X wheels on the Silver One, which has just spent a week out on I85 doing the commute. Hard to believe, but they're all lined up.
So I get out the camera. Here's the random X wheel alignment on the Silver One this evening. I'm telling you, it's the OCD:
http://youtu.be/tOvCXgLbxwc
11-06-11, 05:11 PM
#35
That Oscillator does give me problems sometimes. When it's wet out, sometimes it screeches like crazy and I have to unplug it.
But the oscillator in the Silver One has been working pretty well, I don't think that's the problem.
More likely it's my gravel driveway.
That degree or two you see away from perfect synchrony is because if you move the car around very much on the gravel (like when I did when I jumped the Jeep) the wheels get a little out sync.
But even on the gravel they start to even out, here's a photo I just took this evening after moving the car back to it's usual parking spot:
But the oscillator in the Silver One has been working pretty well, I don't think that's the problem.
More likely it's my gravel driveway.
That degree or two you see away from perfect synchrony is because if you move the car around very much on the gravel (like when I did when I jumped the Jeep) the wheels get a little out sync.
But even on the gravel they start to even out, here's a photo I just took this evening after moving the car back to it's usual parking spot:
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