Do I need different spark plugs?

YNOT · June 5th, 2007, 02:27 AM

this is my set-up i'm bolting together, do i need different spark plugs? it will be dyno tuned for 91 octane.

stock 1989 5.0 ho (not cobra)
stock heads
stock cam to my knowledge
trick flow street upper and lower manifold
bbk 65mm throttle body and spacer
bbk adjustable fuel pressure regulator with gauge
bbk cold air intake
stock maf
stock injectors to my knowledge (unless everyone really thinks i need bigger)
bbk 255lph fuel pump
new fuel filter
mac shorty headers
no cat h-pipe
2.5" flowmaster original 40's
180* thermostat

yes i know i will be under using the manifold, but i'm not going to do a cam and heads right now. anything else little i'm over looking?

thanks.

YNOT · June 5th, 2007, 02:05 PM

Do you guys think it is worth the gas money to tune it for 89 or 91 octane?

5mustang0 · June 5th, 2007, 02:17 PM

are you asking if u need new one's like hotter or colder ones or if u just need to replace them

YNOT · June 5th, 2007, 02:19 PM

Yeah hotter or colder ones.

89LX347 · June 5th, 2007, 03:04 PM

no you wont need to get hotter or colder plugs...but i would for sure get the 91 octane tune you will be glad you did

IcantDo55 · June 5th, 2007, 06:31 PM

Originally Posted by YNOT

Yeah hotter or colder ones.

Sometimes colder plugs let you run a little more timing and in turn more power.

June 5th, 2007, 02:27 AM	#1
YNOT Regular 1989 GT Hatch Join Date: Mar 2007 Posts: 227 iTrader: 0 reviews	Do I need different spark plugs? this is my set-up i'm bolting together, do i need different spark plugs? it will be dyno tuned for 91 octane. stock 1989 5.0 ho (not cobra) stock heads stock cam to my knowledge trick flow street upper and lower manifold bbk 65mm throttle body and spacer bbk adjustable fuel pressure regulator with gauge bbk cold air intake stock maf stock injectors to my knowledge (unless everyone really thinks i need bigger) bbk 255lph fuel pump new fuel filter mac shorty headers no cat h-pipe 2.5" flowmaster original 40's 180* thermostat yes i know i will be under using the manifold, but i'm not going to do a cam and heads right now. anything else little i'm over looking? thanks.

June 5th, 2007, 03:04 PM	#5
89LX347 Hardcore Enthusiast Join Date: Apr 2007 Posts: 1,304 iTrader: 0 reviews	no you wont need to get hotter or colder plugs...but i would for sure get the 91 octane tune you will be glad you did __________________ I believe in art when it is not seen. I believe in music when it is not audible. I believe in God when He is silent.

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June 5th, 2007, 02:05 PM	#2
YNOT Regular 1989 GT Hatch Join Date: Mar 2007 Posts: 227 iTrader: 0 reviews	Do you guys think it is worth the gas money to tune it for 89 or 91 octane?

June 5th, 2007, 02:17 PM	#3
5mustang0 Regular Join Date: May 2007 Location: Ohio Posts: 253 iTrader: 0 reviews	are you asking if u need new one's like hotter or colder ones or if u just need to replace them

June 5th, 2007, 02:19 PM	#4
YNOT Regular 1989 GT Hatch Join Date: Mar 2007 Posts: 227 iTrader: 0 reviews	Yeah hotter or colder ones.

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