Terratrip probes

[Whitey]

Terratrip Probe.
The Terratrip probe is mounted inside the rear brake drum using the forward lower backing plate bolt. The probe senses the heads of the four wheel studs. The angled bracket should mount the probe 45mm from the backing plate. The cable is run thru a hole drilled in the backing plate and can be protected by 6mm PVC hose. The spring for the brake adjuster travels between the probe and the mounting bracket (as shown in the picture)

[ae86trueno]

Shouldnt the probe hole be 12mm ;)
just made ours up, not much to go now.

Ben.

[Crazy Dave]

depends on your probe. Most are 10mm but some are other sizes.

[ae86trueno]

hadnt thought of that , our terratrip probe requred a 12 mm ??

Ben.

[Dave Scott]

Hi all, thanks for the post

I'm about to do this to my car, just before I do where there any problems from heat or anything else.

The lead to my probe will probably be too short, will I create any problems extending the wires ?

Thanks again
Dave

[fro]

Dave, have a look at gearbox probes... I've had one and it's always been bang on, and less hassles to fit than a wheel probe.

[Grumblebum]

+ 2 for Fro's comment I've had wheel probes eaten but the gear box probe is easier to fit /replace--make sure its as tight as possible--and with the Brantz was spot on:)
Regards Grumbo

[Dave Scott]

Thanks guys

Is this the one that you cut the speedo cable and fit a "T" or do you remove the speedo ?

like the T006 in the picture here - http://www.terratrip.com/probes.htm

Dave

[fro]

Dave,

No need to cut the speedo cable, just use the Japanese probe (T007), and it bolts between the gearbox and the existing speedo cable. Easy, and no cutting required.

[Dave Scott]

Ahhhh...

That's the go, getting cheaper and easer all the time.

Thanks for the help, got one on order now.

Dave

[Dave Scott]

It arrived today, big thanks to Luke from Revolution Racegear at Springwood for fantastic service.

Looks nice and easy to fit, thanks for the tip.

Dave

[Mooa42]

It arrived today, big thanks to Luke from Revolution Racegear at Springwood for fantastic service.

Looks nice and easy to fit, thanks for the tip.

Dave

Any chance you could take a pic and upload it for future reference for others?

[ernysxl]

Revolution are great on price they seem to be the first that has brought the prices down significantly in line with the stronger Aussie dollar. Their probes are cheaper landed that from Rally Nuts first time in two years:clap:.

[Dave Scott]

Hi all

I finished of the wiring to the terra trip and it works. Not sure I will have time to calibrate it before tomorrow. It's going on the trailer first thing.

Does anyone know the magic number to put in to calibrate it.

Thanks
Dave

PS I'll post some pics next week.

[Redwarf]

Gday Dave.

There will be a Terratrip calibration run set up.

Get one of the regular navies to go out with you and you should have it done in two passes or so.

In a nutshell, set CAL to 0100 (or it could be 1000, I can never remember which), go for the cal run set up by organizers (should be 5kms), get the figure at the end, divide by 5, and that is your new calibration number. Now bang that number in as the new CAL number on the terratrip, Check on return run, and 5km should be accurate to within 10-20m.

Cheers

R

[rob323]

The number is 0100.

Dave, if you are ever near Joyner, I can show you a piece of road with a dead accurate 1km long stretch marked out (at 100m intervals).

[Dave Scott]

Thanks guys

I had a chance to calibrate the terra trip Saturday morning at Gallangowan on the 5k speedo check.

The numer I used was 1235 for the calibration number and it was within a couple of metres. I don't know if that means it will work for others but if your stuck it might get you out of trouble.

Dave

[rob323]

Dave, typically that number will vary for every event as each odometer check will be set by someone different. But that odometer check at Gallangowan was very accurate as I was only out by 200m over 12 km after calibrating mine with the marked out 1km up the road from me, so write that number down in the glovebox or somewhere handy as it will give you a good starting point for future events.

And bare in mind it will change if you run a different tyre.

Some very nice times you set up there as well and welcome to the ass end of the field where all the fun people are!:clap:

[wagonist]

Something I've always been curious about, how much does wheel spin/handbrake lockup effect the use? Both of these will supply an incorrect reading due to too much/no wheel spin.
Or is it insignificant over a rally stage length?

[Dave Scott]

Mine runs from the gearbox so it has the greatest potential for error. My plan was to get the accumulated distance and compare it to the road book then calculate it as a % and change the magic number to compensate but we were so far off our notes (1st time with a road book) that I didn't need any extra to worry about. Next time maybe.

Not sure if it is the same with all rallys but most distances in the book at Gallangowan were under 1.2k's and when we were on the notes the corners or crests etc.. were where I expected them to be so I think it would have been probably less than 30m out ?

[Grumblebum]

Dave with the set up I used-- gear box probe with a Brantz tripmeter we found that it was bloody near spot on--Now I'm slow but I prefer to do navigational events which require a high degree of accuracy and faith in the trip meter which we achieved. during the #10 trial last year the roads were extremely slippy with lots of mud and wheelspin-still the readings were good.
I also believe imho that the Brantz is a better tool than the Terratrip.
Regards Pete
PS if you ever do Navigational events a DIGITAL Compass is a must:)

[raynman]

Follow up to this thread - is it worth doing the wheel probes or for simplicity sake going with the speedo cable

I know you can get a little wheelspin, but is it enough to warrant having the probes in the rear wheel? (particularly if you need to change hubs on event or does that never happen)?

Only ever used the gearbox probes on 4wds (leone and a legacy) so not massive wheel spin issues there)

[ernysxl]

I run two probes one on the back same setup as Whitey and the other a jap sender of the speedo drive, comparisons on long stages showed 10 meters more distance over 36 km on the speedo drive than the rear wheel probe. I guess it is swings and roundabouts locking the rear wheel with the hand brake and the probe won't register either.

[HMCA]

Follow up to this thread - is it worth doing the wheel probes or for simplicity sake going with the speedo cable

I know you can get a little wheelspin, but is it enough to warrant having the probes in the rear wheel? (particularly if you need to change hubs on event or does that never happen)?

Only ever used the gearbox probes on 4wds (leone and a legacy) so not massive wheel spin issues there)

You'll find that you won't get massive wheel spin issues with an Excel either in most conditions.

No HP=not much spin :attack: