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?
+6
Porch
pormgb
xschop
DVC
Dawgz83948
Lemming
10 posters
944Hybrids: 924/944/968 and 928 V8 Conversions :: Technical Stuff (other than motors) :: General Mechanical
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Re: VSS setup?
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)
Dawgz83948- Posts : 603
Join date : 2009-06-08
Location : Ca.
Re: VSS setup?
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.
Lemming- Posts : 855
Join date : 2011-05-30
Location : B'ham
Re: VSS setup?
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.
Dawgz83948- Posts : 603
Join date : 2009-06-08
Location : Ca.
Re: VSS setup?
Lemming wrote:Is it absolutely necessary?
No, especially with the stock cam.
DVC- Posts : 56
Join date : 2009-07-02
Location : AL
Re: VSS setup?
VSS tells your brain that you're doing 80 (or 120 LOL) and cuts your e-fans off.
xschop- Posts : 2711
Join date : 2009-06-09
Location : OKC
Re: VSS setup?
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.
Lemming- Posts : 855
Join date : 2011-05-30
Location : B'ham
Re: VSS setup?
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.
xschop- Posts : 2711
Join date : 2009-06-09
Location : OKC
6 speed speedo pickup for VSS
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?
pormgb- Posts : 186
Join date : 2010-09-09
Location : San Diego
Re: VSS setup?
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.
Porch- Posts : 851
Join date : 2009-09-02
Age : 42
Re: VSS setup?
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!
DVC- Posts : 56
Join date : 2009-07-02
Location : AL
Re: VSS setup?
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.
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.
Porch- Posts : 851
Join date : 2009-09-02
Age : 42
Re: VSS setup?
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.
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.
DVC- Posts : 56
Join date : 2009-07-02
Location : AL
Re: VSS setup?
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.
Lemming- Posts : 855
Join date : 2011-05-30
Location : B'ham
Re: VSS setup?
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.
Porch- Posts : 851
Join date : 2009-09-02
Age : 42
Re: VSS setup?
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!!
pormgb- Posts : 186
Join date : 2010-09-09
Location : San Diego
Re: VSS setup?
If no one responds contact Brendon who runs Lt1swap.com he is knowledgeable about this sort of programming.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: VSS setup?
Arthropraxis wrote:If no one responds contact Brendon who runs Lt1swap.com he is knowledgeable about this sort of programming.
Thanks !!
pormgb- Posts : 186
Join date : 2010-09-09
Location : San Diego
Re: VSS setup?
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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- Posts : 1265
Join date : 2009-06-09
Age : 102
Location : NOTRE DAME
Re: VSS setup?
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.
[You must be registered and logged in to see this image.][url=https://servimg.com/view/16602502/4][im
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.
[You must be registered and logged in to see this image.][url=https://servimg.com/view/16602502/4][im
pormgb- Posts : 186
Join date : 2010-09-09
Location : San Diego
Re: VSS setup?
Bicycle sprocket. That is hilarious, I must have a dozen and never thought about using one.
Arthropraxis- Posts : 1103
Join date : 2009-09-02
Re: VSS setup?
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 $9.00 you can afford to buy a couple in case you make a mistake.
The sprocket I purchased has a a six bar star pattern with a 1" hole in the middle, all I had to do was center a spare drive shaft seal retainer over the sprocket, mark the six bolt holes (lined up with each bar), then cut the middle out leaving enough material for fixing to the drive shaft after drilling.
pormgb- Posts : 186
Join date : 2010-09-09
Location : San Diego
Re: VSS setup?
Genius.... I wish I thought of that before I spent the 175$
spence- Posts : 684
Join date : 2009-07-21
Age : 41
Location : St.Catharines, Ontario, Canada
VSS and ABS
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?
Did I mention free?
B.Rudy- Posts : 40
Join date : 2009-08-21
Location : Raleigh, NC.
944Hybrids: 924/944/968 and 928 V8 Conversions :: Technical Stuff (other than motors) :: General Mechanical
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