Question on Spark plugs 98 mustang GT

sungho · 07-28-2003, 10:55 AM

Two questions

1.) what spark plugs are recommeded?

2.) Do they give any increase in performance?

Snakeman · 07-28-2003, 02:23 PM

NGK tr-5 is the stock heat range, i believe.
copper plugs deliver more power potential than platinum plugs though they will need replacing more often.

with boosted or nitrous applications, a cooler heat range is desireable.

typically, in a stock application spark plugs will give no significant performance enhancement unless the old plugs are fouled/old/etc.

91LX2Bfast · 07-28-2003, 03:26 PM

Give this a read: Spark Plugs 101
It was written by a fellow Tbird owner with a supercharged 4.6L, so the info holds true for most modular Mustang owners also.

Badass_yellowGT · 07-28-2003, 10:19 PM

if you ever do the head swap you willo need a colder plugs as i just found out the stock autolight 763 are pretty good for stock but head swappeds def need 103 for plugs

GaryDawg · 07-29-2003, 11:26 AM

Motorcraft AWSFA-32-C

Ryan94GT · 08-01-2003, 12:42 PM

Here's what I just installed into my 1998 GT.
NGK Iridium IX - Part No. TR55IX-7164

Note these are threaded all the way.
They work great. My gas mileage increased about 1-2 mpg.
Didn't really feel a power increase but it does seem to rev a little better after 4500rpm.

I got mine at -
http://www.clubplug.net
Ask for Frank (1-866-772-7584)

Good luck.
Ryan

96_4.6 · 08-01-2003, 12:55 PM

7.12 a plug eh, how about them autolite, DW does the commerical

07-28-2003, 10:55 AM	#1
sungho Registered Member Join Date: Jul 2003 Location: Dallas Posts: 8	Question on Spark plugs 98 mustang GT Two questions 1.) what spark plugs are recommeded? 2.) Do they give any increase in performance?

07-28-2003, 02:23 PM	#2
Snakeman Registered Member Join Date: Apr 1999 Location: Grass Valley, CA, USA Posts: 1,389	NGK tr-5 is the stock heat range, i believe. copper plugs deliver more power potential than platinum plugs though they will need replacing more often. with boosted or nitrous applications, a cooler heat range is desireable. typically, in a stock application spark plugs will give no significant performance enhancement unless the old plugs are fouled/old/etc. __________________ LX ~vs~ Camaro

07-28-2003, 03:26 PM	#3
91LX2Bfast Registered Member Join Date: Dec 1999 Location: Warrington, PA Posts: 694	Give this a read: Spark Plugs 101 It was written by a fellow Tbird owner with a supercharged 4.6L, so the info holds true for most modular Mustang owners also. __________________ '97 T-bird LX 4.6L 2V, auto SVO heads/intake, Vortech T-trim, front mounted intercooler, blower cams, Cobra crank, Manley H-beam rods, JE pistons, Aeromotive fuel system w/ 42# injectors, and much more No times yet

07-28-2003, 10:19 PM	#4
Badass_yellowGT Registered Member Join Date: Jun 2002 Location: Western,MA Posts: 254	if you ever do the head swap you willo need a colder plugs as i just found out the stock autolight 763 are pretty good for stock but head swappeds def need 103 for plugs __________________ Rice Haters Club Member #55 For My car Specs Click the Home page link http://www.badassyellowgt.50g.com/

07-29-2003, 11:26 AM	#5
GaryDawg Registered Member Join Date: Aug 1999 Location: Las Vegas, NV Posts: 202	Motorcraft AWSFA-32-C __________________ '98 Rio Red Mustang GT 'vert (clicky) See my "User Ride"...

08-01-2003, 12:42 PM	#6
Ryan94GT Registered Member Join Date: Aug 2002 Posts: 6	Here's what I just installed into my 1998 GT. NGK Iridium IX - Part No. TR55IX-7164 Note these are threaded all the way. They work great. My gas mileage increased about 1-2 mpg. Didn't really feel a power increase but it does seem to rev a little better after 4500rpm. I got mine at - http://www.clubplug.net Ask for Frank (1-866-772-7584) Good luck. Ryan

08-01-2003, 12:55 PM	#7
96_4.6 Registered Member Join Date: Jul 2002 Location: Michigan Posts: 417	7.12 a plug eh, how about them autolite, DW does the commerical __________________ 1996 Mustang GT, AODE -Trickflow Upper Plenum -BBK 70mm Throttlebody -02 PI Lower Intake -March Pulleys -BBK H-Pipe -2 Chamber Flowmaster mufflers -3000 RPM Stall -JLT CAI with special K&N -MSD Supercondutor wires -180 stat -FRPP 4:10's *FOR SALE C&L TRUE FLOW INLET PIPE WITH K&N* My Stang

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