944Hybrids: 924/944/968 and 928 V8 Conversions
Would you like to react to this message? Create an account in a few clicks or log in to continue.
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 …

Comments: 0

Similar topics
    Latest topics
    » ECU Wiring
    LS1 Tach mod EmptyTue Jun 15, 2021 9:47 am by Hotrodz of Dallas

    » bellhousing pressure plate interference
    LS1 Tach mod EmptyMon Jun 14, 2021 9:07 pm by rjarvis

    » LS Overheating Issue
    LS1 Tach mod EmptyMon Jun 14, 2021 8:54 pm by rjarvis

    » wtb: 16" early offset wheels
    LS1 Tach mod EmptySun Jun 13, 2021 1:17 am by sharkey

    » WTB 951 or S2 Trans
    LS1 Tach mod EmptyFri Jun 11, 2021 4:13 pm by Rikstone

    » Drive shaft too short to reach pilot bearning
    LS1 Tach mod EmptyWed Jun 09, 2021 3:00 am by spence

    » TPC Throttle Cable Questions
    LS1 Tach mod EmptyFri Jun 04, 2021 12:54 pm by CyCloNe!

    » 944 LT1 engine mounts and dash lights
    LS1 Tach mod EmptyFri Jun 04, 2021 8:47 am by quarterflash

    » Modified Hooker 2312 Headers for sale
    LS1 Tach mod EmptyFri Jun 04, 2021 7:29 am by gwistrup

    » Ray's 1987 944 LS1 Build & Swap
    LS1 Tach mod EmptyThu Jun 03, 2021 9:50 pm by Raymond-P

    June 2021
    MonTueWedThuFriSatSun
     123456
    78910111213
    14151617181920
    21222324252627
    282930    

    Calendar Calendar

    Log in

    I forgot my password

    LS1 Tach mod

    Go down

    LS1 Tach mod Empty LS1 Tach mod

    Post  cfgioja Thu Sep 09, 2010 1:59 pm

    Curious, People have figured out the LT1 tach mod.

    Does anyone have a way of modifying a Tach for a LS1/LS6 motor?



    cfgioja
    cfgioja

    Posts : 804
    Join date : 2009-11-22
    Age : 37
    Location : Clarksville, AR

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  Porch Thu Sep 09, 2010 4:57 pm

    Step 1: Strip 944 tach wire
    Step 2: Twist wire together with LS computer tach output
    Step 3: Cover with electrical tape
    Step 4: Drive.
    Porch
    Porch

    Posts : 851
    Join date : 2009-09-02
    Age : 39

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  944-LT1 Thu Sep 09, 2010 5:41 pm

    Laughing Laughing Laughing

    Solder too maybe? Laughing

    _________________
    [You must be registered and logged in to see this image.]

    [You must be registered and logged in to see this link.]
    944-LT1
    944-LT1
    Moderator
    Moderator

    Posts : 1263
    Join date : 2009-06-09
    Age : 99
    Location : NOTRE DAME

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  cfgioja Thu Sep 09, 2010 7:22 pm

    there is nothing else to it? I was under the impression the tach need modifying too for an ls1. Guess I need to keep up with you guys alittle more.
    cfgioja
    cfgioja

    Posts : 804
    Join date : 2009-11-22
    Age : 37
    Location : Clarksville, AR

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  cfgioja Sun Nov 21, 2010 10:41 am

    Back on this subject as I will be putting my dash back together. Which wire on the cluster is the tach wire? I have a wire from my PCM that says tach, I just need to hook it to the right wire on the car now.
    cfgioja
    cfgioja

    Posts : 804
    Join date : 2009-11-22
    Age : 37
    Location : Clarksville, AR

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  cfgioja Sun Nov 21, 2010 7:36 pm

    Anybody know what wire to splice into for the tach. I have the cluster out and am looking through the chilton, any help would be nice.
    cfgioja
    cfgioja

    Posts : 804
    Join date : 2009-11-22
    Age : 37
    Location : Clarksville, AR

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  944convert Sun Nov 21, 2010 8:59 pm

    for the late dash cluster, looks like plug "B" pin 3 GN/BK...is the tach input.

    it comes from an 8 pin connector by the original DME (with 3 pins wired/used) pin # 2

    at least per the schematics.

    probably just a pulsing ‘ground’

    surprised nobody with better knowledge has jumped in yet.

    944convert

    Posts : 253
    Join date : 2009-10-25

    Back to top Go down

    LS1 Tach mod Empty 85.5 is Easy

    Post  xschop Sun Nov 21, 2010 9:08 pm

    [You must be registered and logged in to see this link.]
    xschop
    xschop

    Posts : 2710
    Join date : 2009-06-09
    Location : OKC

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  cfgioja Sun Nov 21, 2010 9:15 pm

    I know there was a post out there some where but it didnt pull up when searching for it, thanks guys.
    cfgioja
    cfgioja

    Posts : 804
    Join date : 2009-11-22
    Age : 37
    Location : Clarksville, AR

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  cfgioja Mon Nov 22, 2010 12:45 am

    I hooked up the wire and my tach works but I wonder about the accuracy of it. At idle like a chopper bike it says it is running a 2k. I doubt that very much But it revs up as I hit the gas and when I put it in first the speedo started kicking up alittle. Since it is still on stands I didnt want to go crazy with it.
    cfgioja
    cfgioja

    Posts : 804
    Join date : 2009-11-22
    Age : 37
    Location : Clarksville, AR

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  Porch Mon Nov 22, 2010 10:07 am

    Has your computer been monkeyed with? Stock, the computer outputs a 4-cylinder tach signal. If someone has modified the computer, they might have set it to output an 8-cylinder tach signal. That's what happened to xschop...

    Glad it's running though!
    Porch
    Porch

    Posts : 851
    Join date : 2009-09-02
    Age : 39

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  cfgioja Tue Nov 23, 2010 10:58 pm

    It has been modified, I will ask John at speartech if that is what he did. Thanks for the info.

    Thanks for the support too.
    cfgioja
    cfgioja

    Posts : 804
    Join date : 2009-11-22
    Age : 37
    Location : Clarksville, AR

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  cfgioja Wed Nov 24, 2010 12:42 pm

    John Spears got back with me:

    Collin,

    1) 202 on, 197 off. (temp for primary fan)

    2) Yes, Tach set to 8 cyl output.

    3) No cam changes made to your PCM program. No cam specs provided. (figuring out if it needs a tune to match my new cam)

    Thanks,

    John
    Speartech Fuel Injection Systems, Inc.

    so when I go to get a dyno and tune run I can reset the tach signal right?
    cfgioja
    cfgioja

    Posts : 804
    Join date : 2009-11-22
    Age : 37
    Location : Clarksville, AR

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  Porch Wed Nov 24, 2010 1:29 pm

    Egg-zackary!
    Porch
    Porch

    Posts : 851
    Join date : 2009-09-02
    Age : 39

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  cfgioja Wed Nov 24, 2010 8:13 pm

    now I have to keep it under 3500 rpm so I dont break the Tach at 7k. lol
    cfgioja
    cfgioja

    Posts : 804
    Join date : 2009-11-22
    Age : 37
    Location : Clarksville, AR

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  the951racer Tue Jan 24, 2012 10:44 am

    So what is the best way to set up the tach on a 88 951?

    the951racer

    Posts : 135
    Join date : 2012-01-11
    Age : 37
    Location : Madison, MS

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  the951racer Tue Jan 24, 2012 10:50 am

    Disregard the above ^....I found that the LS1 runs on the 4cyl. tach. signal just took me a minute to find it.

    the951racer

    Posts : 135
    Join date : 2012-01-11
    Age : 37
    Location : Madison, MS

    Back to top Go down

    LS1 Tach mod Empty Tach

    Post  fliermike45 Tue Jan 24, 2012 10:56 am

    On my 88 NA I connected the PCM tach output to the green/black wire on pin 2 of the 8 pin connector under the passenger side of the dash. This connector originally went to the Porsche computer.
    Porsche Tach works fine.

    To confirm this, Page 8 of the 88 turbo wiring schematic shows the same hook up.

    fliermike45

    Posts : 778
    Join date : 2009-09-19

    Back to top Go down

    LS1 Tach mod Empty Re: LS1 Tach mod

    Post  the951racer Tue Jan 24, 2012 11:57 am

    fliermike45 wrote:On my 88 NA I connected the PCM tach output to the green/black wire on pin 2 of the 8 pin connector under the passenger side of the dash. This connector originally went to the Porsche computer.
    Porsche Tach works fine.

    Thanks for the info. Although I'm not ready for wiring quite yet, I'm gathering all the info I can.

    the951racer

    Posts : 135
    Join date : 2012-01-11
    Age : 37
    Location : Madison, MS

    Back to top Go down

    Back to top

    - Similar topics

     
    Permissions in this forum:
    You cannot reply to topics in this forum