944Hybrids

Fri Dec 03, 2010 8:52 am by Admin

Welcome to our forum.
Please register if you would like, Contribute information if you can.
[You must be registered and logged in to see this image.]
Thanks
Admin

Comments: 0

Similar topics
Latest topics
» Pacific Raceways near Seattle
Today at 7:26 am by Lemming

» HELP . . . Electrical gremlin
Today at 12:01 am by Rich L.

» Rich's LS powered 944 track car
Yesterday at 8:59 pm by Lemming

» First Time Swap 85 Porsche 944 to LS6
Yesterday at 7:03 pm by kjducati

» Oil and steering cooler options
Yesterday at 6:11 pm by docwyte

» selling conversion parts due to new baby
Yesterday at 4:29 pm by zeusrotty

» Strut brace?
Mon May 14, 2012 5:38 pm by fliermike45

» What LS Exhaust Manifolds / Headers
Mon May 14, 2012 1:56 pm by epsylon9mm

» building a 1983 948 on a budget - pointers?
Mon May 14, 2012 7:19 am by Admin

» To " badge or not to badge "
Sun May 13, 2012 5:01 pm by 944-LT1

May 2012
MonTueWedThuFriSatSun
 123456
78910111213
14151617181920
21222324252627
28293031   

Calendar Calendar

Log in

I forgot my password


LS1 Tach mod

944Hybrids: 924/944/968 and 928 V8 Conversions :: Technical Stuff (other than motors) :: The "How To" Section

Page 1 of 2 • 1, 2  Next

View previous topic View next topic Go down

LS1 Tach mod

Post  cfgioja on 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

Posts: 751
Join date: 2009-11-22
Age: 27
Location: Clarksville, AR

Back to top Go down

Re: LS1 Tach mod

Post  Porch on 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

Posts: 770
Join date: 2009-09-02
Age: 30

Back to top Go down

Re: LS1 Tach mod

Post  944-LT1 on 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
Moderator
Moderator

Posts: 1056
Join date: 2009-06-09
Age: 90
Location: NOTRE DAME

Back to top Go down

Re: LS1 Tach mod

Post  cfgioja on 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

Posts: 751
Join date: 2009-11-22
Age: 27
Location: Clarksville, AR

Back to top Go down

Re: LS1 Tach mod

Post  cfgioja on Sun Nov 21, 2010 11:41 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

Posts: 751
Join date: 2009-11-22
Age: 27
Location: Clarksville, AR

Back to top Go down

Re: LS1 Tach mod

Post  cfgioja on Sun Nov 21, 2010 8:36 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

Posts: 751
Join date: 2009-11-22
Age: 27
Location: Clarksville, AR

Back to top Go down

Re: LS1 Tach mod

Post  944convert on Sun Nov 21, 2010 9:59 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: 58
Join date: 2009-10-25

Back to top Go down

85.5 is Easy

Post  xschop on Sun Nov 21, 2010 10:08 pm

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

xschop

Posts: 2073
Join date: 2009-06-09
Location: OKC

Back to top Go down

Re: LS1 Tach mod

Post  cfgioja on Sun Nov 21, 2010 10:15 pm

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

cfgioja

Posts: 751
Join date: 2009-11-22
Age: 27
Location: Clarksville, AR

Back to top Go down

Re: LS1 Tach mod

Post  cfgioja on Mon Nov 22, 2010 1:45 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

Posts: 751
Join date: 2009-11-22
Age: 27
Location: Clarksville, AR

Back to top Go down

Re: LS1 Tach mod

Post  Porch on Mon Nov 22, 2010 11:07 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

Posts: 770
Join date: 2009-09-02
Age: 30

Back to top Go down

Re: LS1 Tach mod

Post  cfgioja on Tue Nov 23, 2010 11:58 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

Posts: 751
Join date: 2009-11-22
Age: 27
Location: Clarksville, AR

Back to top Go down

Re: LS1 Tach mod

Post  cfgioja on Wed Nov 24, 2010 1:42 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

Posts: 751
Join date: 2009-11-22
Age: 27
Location: Clarksville, AR

Back to top Go down

Re: LS1 Tach mod

Post  Porch on Wed Nov 24, 2010 2:29 pm

Egg-zackary!

Porch

Posts: 770
Join date: 2009-09-02
Age: 30

Back to top Go down

Re: LS1 Tach mod

Post  cfgioja on Wed Nov 24, 2010 9:13 pm

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

cfgioja

Posts: 751
Join date: 2009-11-22
Age: 27
Location: Clarksville, AR

Back to top Go down

Page 1 of 2 • 1, 2  Next

View previous topic View next topic Back to top

- Similar topics

944Hybrids: 924/944/968 and 928 V8 Conversions :: Technical Stuff (other than motors) :: The "How To" Section

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