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Old 01-03-2013, 03:20 PM   #11 (permalink)
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What tool is on the front hub?

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Old 01-03-2013, 03:28 PM   #12 (permalink)
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I found the document, now I'll see if I can find the link to the document. It is from the "Yahoo group"-Insighters back in 12/2002.

Here is the parts list:
CD4040BC (Digital counter)
SPST Relay
DPDT Relay
5V Regulator
4.7k
10k*2
47k
.1uF Ceramic
.01uF Ceramic
10uF Electrolitic
PNP Transistor*2

"This circuit divides the 4000PPM Signal by two. When enabled it sends the ECU a modified VSS signal. It should not be used below 90mph."

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Old 01-03-2013, 03:42 PM   #13 (permalink)
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Quote:
Originally Posted by fuelsipper View Post
What tool is on the front hub?

snip
It looks like they're going to be hooking it up to a dyno. You can see where the fitting fits into a socket on the red machine.

I've never seen one like that before. Odd. Probably more accurate than the "rolling road" type though.
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Last edited by Eli; 01-03-2013 at 03:45 PM.
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Old 01-04-2013, 07:22 AM   #14 (permalink)
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It is called a Dynapak. They are pretty common any more these days. They eliminate the potential for traction issues you would have on a normal roller dynometer. It's not true at the wheel power, but more like at the hub.

If I was to guess, it is probably the one that belongs to Locash Racing, since they are a few doors down from Hasport. I visited both places a few years ago when I bought a CR-X HF in Los Angles, and drove it home to Ohio. I stayed in Phoenix for a few days with my friend who also works at Hasport.
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Old 01-04-2013, 11:40 AM   #15 (permalink)
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You don't need to modify the VSS. Either way you go you'll make it not accurate on the dash. Easiest to pull it and make your run using a GPS to monitor speed. You'll disturb the ABS and EPS system probably, temporary until the issue is corrected though.

Tire speed rating is a strong motivator to stay under considering a blowout over about 85mph would likely be uncontrollable, even for just a straight line to coast down.

3rd gear hits max speed on the track without assist. 4th gear and you need assist to hold max speed. 3rd gear redlines pretty much right at the 112mph max(see where it's at for 3000RPM). So 4th gear with a stock setup would need a good fully charged battery that can handle a long stiff discharge to do such a test.

Don't do it with stock tires, also consider possible issues with the car aerodynamically lifting off. Ground effect and downforce, two different things. Granted it isn't an airplane but high speed is quite powerful. I don't think you'll get much past 120 and if you could hit redline in 4th gear, it wouldn't be long. Maybe 130. Guessing though. Please don't die or destroy an Insight.
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Old 01-05-2013, 04:25 PM   #16 (permalink)
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The speed delimiters are the same as what happens when you import a jap car and need to change it to mph. Typically that applies 5/8 to the VSS pulse and if that's done from the VSS sensor so that it goes to the ECU AND cluster the the limiter simply moves from 112mph (180kph) to 180mph.

Problem with that is the ECU sees the lower speed for revs so will think you are in a Lowe gear than you are, this could have quite an effect on the IMA system in how much it assist and regens aswell as the typical calibration gear fuel/ignition trims. I notice I get more assist in the higher gears?


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Old 01-05-2013, 05:35 PM   #17 (permalink)
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Quote:
Originally Posted by MN Driver View Post
You don't need to modify the VSS. Either way you go you'll make it not accurate on the dash.
You could use a microcontroller to split the signal - have the regular signal go to the dash, and the modified signal to the computer. Unless the computer takes it from the dash instead.

Sorry if I'm completely wrong; is this even possible? I'm not too sure where the computer gets VSS from specifically.
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Old 01-05-2013, 09:03 PM   #18 (permalink)
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here is the diagram showing the VSS going to the speedo and splitting to go to the ECU. Possibly you can just disconnect the wire that goes into the ECU.

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Old 01-06-2013, 05:00 PM   #19 (permalink)
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No speed typically means no VTEC in a Honda.


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