Pennock's Fiero Forum
  Technical Discussion & Questions - Archive
  Modify Tach for V8

T H I S   I S   A N   A R C H I V E D   T O P I C
  
Email This Page to Someone! | Printable Version
Modify Tach for V8 by Driver_WT
Started on: 08-22-2012 01:35 PM
Replies: 4
Last post by: Driver_WT on 08-22-2012 03:21 PM
Driver_WT
Member
Posts: 166
From: River John, NS, Canada
Registered: Mar 2012

Feedback score: (2)
Leave feedback

Rate this member
Report this Post08-22-2012 01:35 PM Click Here to See the Profile for Driver_WTSend a Private Message to Driver_WTDirect Link to This Post
How do I modify the GT tach to work with a V8 engine (SBC 355)?

Thanks.

Wade

------------------
1984 Fiero, Black notchback, 355 SBC, 4 speed

IP: Logged
PFF
System Bot
NJD85GT
Member
Posts: 317
From: Houston, TX
Registered: Nov 2005

Feedback score: (4)
Leave feedback

Rate this member
Report this Post08-22-2012 02:31 PM Click Here to See the Profile for NJD85GTSend a Private Message to NJD85GTDirect Link to This Post
You have to either cut a trace and install a new resistor, or put another resistor or potentiometer in parallel with the existing one. You need your new resistance to be 3/4 of your old resistance if you have a V6 tach. A potentiometer allows you to dial it in perfect. Here is how I did mine, about halfway down.

https://www.fiero.nl/forum/Forum1/HTML/089365.html

------------------
1985 GT | 4.9 Allante | M17/MY8 Hybrid 4-Spd Muncie | '88 GT Cradle Swap

IP: Logged
Driver_WT
Member
Posts: 166
From: River John, NS, Canada
Registered: Mar 2012

Feedback score: (2)
Leave feedback

Rate this member
Report this Post08-22-2012 02:44 PM Click Here to See the Profile for Driver_WTSend a Private Message to Driver_WTDirect Link to This Post
 
quote
Originally posted by NJD85GT:

You have to either cut a trace and install a new resistor, or put another resistor or potentiometer in parallel with the existing one. You need your new resistance to be 3/4 of your old resistance if you have a V6 tach. A potentiometer allows you to dial it in perfect. Here is how I did mine, about halfway down.

https://www.fiero.nl/forum/Forum1/HTML/089365.html



Thanks. Any way to make it so that the pics are displayed?

Wade
IP: Logged
NJD85GT
Member
Posts: 317
From: Houston, TX
Registered: Nov 2005

Feedback score: (4)
Leave feedback

Rate this member
Report this Post08-22-2012 02:53 PM Click Here to See the Profile for NJD85GTSend a Private Message to NJD85GTDirect Link to This Post
 
quote
Originally posted by Driver_WT:


Thanks. Any way to make it so that the pics are displayed?

Wade


Hmm, pics show up for me? Must be something on your end.

Nate

------------------
1985 GT | 4.9 Allante | M17/MY8 Hybrid 4-Spd Muncie | '88 GT Cradle Swap

IP: Logged
Driver_WT
Member
Posts: 166
From: River John, NS, Canada
Registered: Mar 2012

Feedback score: (2)
Leave feedback

Rate this member
Report this Post08-22-2012 03:21 PM Click Here to See the Profile for Driver_WTSend a Private Message to Driver_WTDirect Link to This Post
I tried it again and the pics showed up. Thanks.
IP: Logged



All times are ET (US)

T H I S   I S   A N   A R C H I V E D   T O P I C
  

Contact Us | Back To Main Page

Advertizing on PFF | Fiero Parts Vendors
PFF Merchandise | Fiero Gallery
Real-Time Chat | Fiero Related Auctions on eBay



 Copyright (c) 1999, C. Pennock