stock tach

noney16 · 04-02-2002, 11:44 AM

i have an 89 lx, and i was wondering how far the tach is off when i rev up to about 5000 rpm, and if it is off about how much and in which direction

89 Cobra LX · 04-02-2002, 11:51 AM

When I went to the dyno my tack was off by about 800 RPMs. When my tack read 6300 RPMs I was actually at 5,500 RPMs.

drudis · 04-02-2002, 03:00 PM

Its not so much that they are off xxx-rpm... Its more like that they arent as responsive as say my Autometer.
THey move radically different, imagine telling two drivers to rev their motors... "ok, now..." not even close!
I was tired of watching the two move so differently, that I disconnected the stock one cause it was anoying!

89 Cobra LX · 04-02-2002, 03:19 PM

Furthermore, at idle, my tach was off by about 200 RPMs.

04-02-2002, 11:44 AM	#1
noney16 Registered Member Join Date: Apr 2000 Location: Lancaster,NY,US Posts: 8	stock tach i have an 89 lx, and i was wondering how far the tach is off when i rev up to about 5000 rpm, and if it is off about how much and in which direction

04-02-2002, 11:51 AM	#2
89 Cobra LX Don Corlione Join Date: Jun 2001 Location: Omaha NE USA Posts: 491	When I went to the dyno my tack was off by about 800 RPMs. When my tack read 6300 RPMs I was actually at 5,500 RPMs. __________________ Eric - 89 Mustang LX coupe 5 speed 302-Cobra Intake-GT40p heads-TFS stage 1 cam-FRPP 1.6 roller rockers-3:73 gears-KYB shocks and struts-Eibach Pro-kit-HPM Mega-bite upper and lower control arms-FRPP aluminum driveshaft-16x8 Chrome Cobra Rs R.H.C. #14

04-02-2002, 03:00 PM	#3
drudis Moderator Join Date: Dec 1999 Location: Livonia, MI, USA Posts: 1,194	Its not so much that they are off xxx-rpm... Its more like that they arent as responsive as say my Autometer. THey move radically different, imagine telling two drivers to rev their motors... "ok, now..." not even close! I was tired of watching the two move so differently, that I disconnected the stock one cause it was anoying! __________________ Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com

04-02-2002, 03:19 PM	#4
89 Cobra LX Don Corlione Join Date: Jun 2001 Location: Omaha NE USA Posts: 491	Furthermore, at idle, my tach was off by about 200 RPMs. __________________ Eric - 89 Mustang LX coupe 5 speed 302-Cobra Intake-GT40p heads-TFS stage 1 cam-FRPP 1.6 roller rockers-3:73 gears-KYB shocks and struts-Eibach Pro-kit-HPM Mega-bite upper and lower control arms-FRPP aluminum driveshaft-16x8 Chrome Cobra Rs R.H.C. #14

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