HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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VSS Setup (and tuning)...

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PCD

Post  xschop on Mon Nov 02, 2009 10:28 am

the dimension should read 3.385" (86mm)
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dimensions

Post  Bridar on Mon Nov 02, 2009 11:28 am

That could be true. Since I am running the 01E 6-spd trany, it is likely that the hubs and half-shafts are different as well.
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Re: VSS Setup (and tuning)...

Post  robstah on Mon Nov 02, 2009 1:47 pm

Bridar wrote:I don't think the tooth shape will matter. The sensor is an inductive pick up and it is only looking for a change in inductance which through the circuitry is then changed into a high/low signal. Whether the input waveform is square or sinusoidal does not matter.

I am not so worried about having the signal pick up, but how weak that signal is, especially at high speeds. Another problem you may encounter is with that small of a pickup, if the sensor gets dirty, and it will easily in that location, you may lose your signal completely.

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Re: VSS Setup (and tuning)...

Post  gt1scca on Sun Jan 24, 2010 1:12 am

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This version mounts the sensor at the top-right position on the passenger side of the transaxle case. This protects the sensor, and the clockwise motion of the Reluctor Wheel will provide an occasional "rinse" cycle (in the rain, or otherwise wet road) for the pickup.

The flats and radii closely mimic the 944 cam gear that has been proven to be an effective Reluctor, so loss of signal should not be an issue.

Make 'em there, or buy 'em...Well, you know.

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Wheel 'n' Deal

Post  gt1scca on Fri Jan 29, 2010 4:57 pm

Picked these up yesterday...

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These are .116" thick Stainless Steel, and do not require removal of the axle to install.
Sensor brackets are being cut early next week.
Sensors and pigtails are here now.

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Re: VSS Setup (and tuning)...

Post  968ls1 on Sat Jan 30, 2010 9:17 pm

Got mine reluctor yesterday and it looks great.

Thanks Greg!!

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Re: VSS Setup (and tuning)...

Post  robstah on Sat Jan 30, 2010 9:20 pm

Any clue on what the calculated values should be for the speed sensor in the diff (86 and up)?

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Re: VSS Setup (and tuning)...

Post  cfgioja on Sat Jan 30, 2010 9:24 pm

was wondering why you are hooking up the VSS? what inportance does this serve in this conversion?
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Re: VSS Setup (and tuning)...

Post  968ls1 on Sat Jan 30, 2010 9:28 pm

Better drive-ability with bigger than stock cams.

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Re: VSS Setup (and tuning)...

Post  Admin on Sat Jan 30, 2010 9:33 pm

Also, The vss tells your computer that you stopped and lets it know that it needs to return to an idle. The computer uses it to know if the car is in motion or not. If you don't hook it up you could have the problem of your computer searching for a idle when you come to a stop.

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Re: VSS Setup (and tuning)...

Post  xschop on Sat Jan 30, 2010 9:40 pm

Also affects fan function.
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Re: VSS Setup (and tuning)...

Post  cfgioja on Sat Jan 30, 2010 11:08 pm

Ok I can see what the concerns on the idle part are, I didnt have mine hooked up. I still have the end I cut off so I can figure it out when the time comes.

As far as fans go they are on their own harness.

So all we need to do this is the gear, sensor, and a couple of brackets? Then I go to a shope to get programmed?

And you sell all this?
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Re: VSS Setup (and tuning)...

Post  DVC on Wed Feb 10, 2010 5:47 pm

Greg- Do you have any more VSS kits for sale?

Thanks,
Travis
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Re: VSS Setup (and tuning)...

Post  gt1scca on Wed Feb 10, 2010 6:18 pm

Yes Travis,

But, the water-jet has been delayed on the brackets. I have everything else (i.e. sensor, pigtails, reluctor wheel) in stock. Brackets won't be available for another week. Yeah, they're simple, I know...but my local 'jet-man is very busy.

In other words, yes for MOST of it...
I should have the brackets by next Friday, latest.

Embarassed

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Re: VSS Setup (and tuning)...

Post  DVC on Wed Feb 10, 2010 6:36 pm

Sounds good, I'd like to buy the whole kit.
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Re: VSS Setup (and tuning)...

Post  Modian on Thu Aug 05, 2010 6:19 pm

If these are still available, I'd like to pick one of these up as well, Greg. I sent you an email about it yesterday.

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Specs for vss gear

Post  storch on Tue Dec 28, 2010 11:11 am

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Anyone have the specs for drilling/converting a 944 cam gear for vss use on the driveshaft? All I could find was the pic shown on the first post in this thread. But no dimensions.

Thanks
Storch
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Re: VSS Setup (and tuning)...

Post  Arthropraxis on Tue Dec 28, 2010 12:18 pm

Out of the Wiki
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Re: VSS Setup (and tuning)...

Post  Admin on Tue Dec 28, 2010 12:46 pm

As with most of the drawings Greg published, the wiki picture is incorrect and will not work without modification. Trust me I found out the hard way!

As far as the cam gear conversion. Just measure the CV boot metal ring and have it cut just enough to clear , drill the holes and your done.

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Re: VSS Setup (and tuning)...

Post  xschop on Tue Dec 28, 2010 1:34 pm

Unfortunately the Cam gear has to be step-radiused between the CV bolts or it will not bolt down and seat correctly due to the CV boot bases.

Have you seen these?....Lightweight too

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sorry to resurface on old thread but...

Post  Gutterboy on Tue Aug 06, 2013 12:54 pm

so does TPC's VSS kit with sensor include the bracket to mount the sensor?

and this goes on the transaxle just before the torque tube?

something tells my carved up ls1 wiring harness will be too short to reach this sensor, so i'll probably have to buy a connector and run new wires back to wherever this part of the harness ends....

Thanks for the answers in advance.

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Re: VSS Setup (and tuning)...

Post  Techno Duck on Tue Aug 06, 2013 2:11 pm

The kit comes with the bracket, sensor and the pickup ring. There are two bosses on the transmission that the bracket mounts too, the pickup ring is mounted on the CV joint. Very easy to install!

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Re: VSS Setup (and tuning)...

Post  Rich L. on Tue Aug 06, 2013 3:01 pm

I installed TPC's VSS kit and it made my engine handle idle conditions much better. But now I'm having trouble with that CV joint loosening from the transmission output flange. Twice now I've developed a clicking noise on track and returned to the paddock to find the bolts loose and all the grease flung around under the car.

Originally, I reused the factory stretch bolts and torqued them back down to 30 ft-lbs. When they came loose the first time I switched to grade 12.9 socket cap screws with lock washers and torqued them to that same 30 ft-lbs. But last time out those came loose too. It's always the same driver side inner CV where I put the toothed wheel for the VSS.

Anyone else with the VSS had this trouble? Perhaps I just need to whack them on there tighter. Or maybe the threaded holes in the flange are f-ed up and oval shaped from this coming loose.

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Re: VSS Setup (and tuning)...

Post  87-944S on Tue Aug 06, 2013 9:08 pm

Hey Rich, maybe some of those stage 8 locking rings would help. They work great on my headers, and I will probably use them for the CVs when I put in my chromoly axles.
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Re: VSS Setup (and tuning)...

Post  Rich L. on Mon Aug 12, 2013 4:11 pm

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Well, my car has been missing these "Schnorr" washers on the CV bolts. It seems Porsche quit putting these in after '84 or so and I read lots of horror stories on other forums of axles coming loose. So I have a package of "bellevue" lock washers coming from McMaster-Carr and will install those with new socket cap screws making sure to clean all of the grease from the flange threads. I've also replaced the trans output flange just in case. I hope this ends my troubles.

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