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?

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VSS setup?

Post  Lemming on Thu Jun 09, 2011 8:15 am

Is it absolutely necessary?
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Re: VSS setup?

Post  Dawgz83948 on Thu Jun 09, 2011 9:40 am

Lemming wrote:Is it absolutely necessary?

In california yes, everywhere else no, but you may run into drivability issues. (dieing when stopping at a light and decreased fuel efficiency)
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Re: VSS setup?

Post  Lemming on Thu Jun 09, 2011 11:23 am

Dawgz83948 wrote:
Lemming wrote:Is it absolutely necessary?

In california yes, everywhere else no, but you may run into drivability issues. (dieing when stopping at a light and decreased fuel efficiency)

This is for a dedicated race car, it will never see the street unless I race on a street circuit.
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Re: VSS setup?

Post  Dawgz83948 on Thu Jun 09, 2011 12:34 pm

Lemming wrote:
Dawgz83948 wrote:
Lemming wrote:Is it absolutely necessary?

In california yes, everywhere else no, but you may run into drivability issues. (dieing when stopping at a light and decreased fuel efficiency)

This is for a dedicated race car, it will never see the street unless I race on a street circuit.

Probably not then.
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Re: VSS setup?

Post  DVC on Fri Jun 10, 2011 5:18 pm

Lemming wrote:Is it absolutely necessary?

No, especially with the stock cam.
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Re: VSS setup?

Post  xschop on Fri Jun 10, 2011 6:33 pm

VSS tells your brain that you're doing 80 (or 120 LOL) and cuts your e-fans off.
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Re: VSS setup?

Post  Lemming on Sat Jun 11, 2011 6:57 am

xschop wrote:VSS tells your brain that you're doing 80 (or 120 LOL) and cuts your e-fans off.

My fan is controlled by a toggle switch.
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Re: VSS setup?

Post  xschop on Sat Jun 11, 2011 10:02 am

Before I cut my cam gear and installed it, the engine RPM would also dip and try to die when I came to a fast stop from doing 50mph or so. TPC's VSS kit is very lightweight if you do decide you need one.
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6 speed speedo pickup for VSS

Post  pormgb on Sat Jun 11, 2011 6:37 pm

I have a 6 speed tranny in my conversion and am planning to enable VSS, I use a VDO pickup with an 8 blade slotted wheel for my speedo. Could the PCM be programmed to use this wheel?
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Re: VSS setup?

Post  Porch on Sun Jun 12, 2011 8:26 am

I would install a VSS regardless of the application. The vehicle speed is used to calculate load. It's not a difficult sensor to install and it will probably run better with it.
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Re: VSS setup?

Post  DVC on Sun Jun 12, 2011 8:51 am

Porch wrote:I would install a VSS regardless of the application. The vehicle speed is used to calculate load. It's not a difficult sensor to install and it will probably run better with it.

Can you elaborate on this please? I've been tuning my LS1 PCM for 3 years with HP Tuners and have never heard of load being calculated with the VSS. I've been able to get idle stability when coming to a stop and DFCO, but have seen no perimeters relating to load.

Thanks!
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Re: VSS setup?

Post  Porch on Sun Jun 12, 2011 6:14 pm

A couple of things:

1. I could be wrong. Many cars do--perhaps the LS motors don't.

2. Where would you be expecting to see this calculation in HP Tuners? I have used the program as well.

3. Why on god's green earth would you spend all that time tuning to avoid installing such a simple sensor???? I made my own--it's not as nice as TPC's but it works, and i didn't have to mess with the computer for hours to make it run "almost as good as a vehicle without a VSS"....

4. Just put the VSS on there.
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Re: VSS setup?

Post  DVC on Sun Jun 12, 2011 6:36 pm

Porch-

Porch wrote:
2. Where would you be expecting to see this calculation in HP Tuners? I have used the program as well.

OK, I looked in all of the tune parameters as well as searched the HP forum, and it doesn't effect load with the LS1 PCM. As a track car with a stock cam I don't think he'd see much benefit, but like you said it's easy to add.

P.S. I picked up 2 MPG by adding the VSS and rescaling the DFCO settings much more aggressively.
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Re: VSS setup?

Post  Lemming on Sun Jun 12, 2011 7:10 pm

I'm not against installing it, but if there is no real function from 3500 to redline, then it is of little use to me.
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Re: VSS setup?

Post  Porch on Sun Jun 12, 2011 10:38 pm

DVC wrote:Porch-

OK, I looked in all of the tune parameters as well as searched the HP forum, and it doesn't effect load with the LS1 PCM. As a track car with a stock cam I don't think he'd see much benefit, but like you said it's easy to add.

P.S. I picked up 2 MPG by adding the VSS and rescaling the DFCO settings much more aggressively.

I just meant, in terms of tuning software, that i wouldn't expect to see it be a modifiable variable--more as a multiplier (i.e. more load at 120mph than at 20mph). But anyways, good to know.
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Re: VSS setup?

Post  pormgb on Mon Jun 13, 2011 6:36 am

pormgb wrote:I have a 6 speed tranny in my conversion and am planning to enable VSS, I use a VDO pickup with an 8 blade slotted wheel for my speedo. Could the PCM be programmed to use this wheel?

anyone!!

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Re: VSS setup?

Post  Arthropraxis on Mon Jun 13, 2011 6:44 am

If no one responds contact Brendon who runs Lt1swap.com he is knowledgeable about this sort of programming.
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Re: VSS setup?

Post  pormgb on Mon Jun 13, 2011 10:16 am

Arthropraxis wrote:If no one responds contact Brendon who runs Lt1swap.com he is knowledgeable about this sort of programming.

Thanks !!
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Re: VSS setup?

Post  944-LT1 on Mon Jun 13, 2011 10:19 am

pormgb wrote:
pormgb wrote:I have a 6 speed tranny in my conversion and am planning to enable VSS, I use a VDO pickup with an 8 blade slotted wheel for my speedo. Could the PCM be programmed to use this wheel?

anyone!!


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Re: VSS setup?

Post  pormgb on Tue Jun 21, 2011 8:16 pm

Hi All,

Just wanted to share my success!!

I picked up $9.00 34 teeth Bicycle sprocket and modified it to fit on my right hand drive shaft, this works like a charm and fixed my stalling problem. I'm using EFI Live so it has tools to calculate all the VSS parameters based on the 34 teeth sprocket.

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[You must be registered and logged in to see this link.][url=http://www.servimg.com/image_preview.php?i=4&u=16602502][im
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Re: VSS setup?

Post  Arthropraxis on Tue Jun 21, 2011 9:06 pm

Bicycle sprocket. That is hilarious, I must have a dozen and never thought about using one.
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Re: VSS setup?

Post  pormgb on Tue Jun 21, 2011 10:21 pm

Arthropraxis wrote:Bicycle sprocket. That is hilarious, I must have a dozen and never thought about using one.

Yep, the Bike shop I visited actually had a 40 tooth sprocket but it was aluminum, at $9.00 you can afford to buy a couple in case you make a mistake.

The sprocket I purchased has a a six bar star pattern with a 1" hole in the middle, all I had to do was center a spare drive shaft seal retainer over the sprocket, mark the six bolt holes (lined up with each bar), then cut the middle out leaving enough material for fixing to the drive shaft after drilling.
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Re: VSS setup?

Post  spence on Wed Jun 22, 2011 4:55 am

Genius.... I wish I thought of that before I spent the 175$
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VSS and ABS

Post  B.Rudy on Tue Feb 11, 2014 5:07 pm

I just tapped into my rt rear ABS sensor, right at the ABS computer and used HP Tuners. I havent completely tuned it so it reads approx 10 mph off at 55 mph but you get the idea.
Did I mention free?

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Re: VSS setup?

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