ngk tr6 or autolite AR103...std copper core..which is the better for boost?
03-12-2012, 02:19 PM
#1
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Join Date: Mar 2009
Posts: 125
ngk tr6 or autolite AR103...std copper core..which is the better for boost?
Question 1.
Which is the better plug for forced induction applications?
p600b blower 10 psi max boost, meth/water inj, 9.7:1 compression, lloyd elliot 224/236 114 LSA cam. 1 3/4" long tubes; stock bottom end.
these would be on afr 195 eliminator comp port heads that I am installing.
thanks.
Question 2.
I also see they make an AR94 - which im assuming is a cooler plug.
However, I dont know if I need that one. I guess the car ran fine (old ported heads, and hotcam, w/ 11psi boost on the p600b, stock 10.5:1 compression w/ meth/water injection) on the TR6's.
Though I am putting in Lloyd Elliot cam and putting way better heads on....prob an extra 75 rwhp. Up to 545 rwhp-ish is my guess.
Would you go a heat range cooler than what worked before (NGK TR6)?
Which is the better plug for forced induction applications?
p600b blower 10 psi max boost, meth/water inj, 9.7:1 compression, lloyd elliot 224/236 114 LSA cam. 1 3/4" long tubes; stock bottom end.
these would be on afr 195 eliminator comp port heads that I am installing.
thanks.
Question 2.
I also see they make an AR94 - which im assuming is a cooler plug.
However, I dont know if I need that one. I guess the car ran fine (old ported heads, and hotcam, w/ 11psi boost on the p600b, stock 10.5:1 compression w/ meth/water injection) on the TR6's.
Though I am putting in Lloyd Elliot cam and putting way better heads on....prob an extra 75 rwhp. Up to 545 rwhp-ish is my guess.
Would you go a heat range cooler than what worked before (NGK TR6)?
Last edited by dizwiz24; 03-12-2012 at 02:32 PM.
03-12-2012, 08:56 PM
#3
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Join Date: Mar 2009
Posts: 125
03-13-2012, 10:25 AM
#5
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Join Date: Oct 2000
Posts: 219
Re: ngk tr6 or autolite AR103...std copper core..which is the better for boost?
99.99% sure AFR, Trickflow, etc use a gasketed plug as opposed to a tapered plug la TR6.
Something like:
Autolite AR3923 - Autolite Racing Spark Plugs - Overview - SummitRacing.com
or
NGK Spark Plugs 6962 - NGK V-Power Spark Plugs - Overview - SummitRacing.com
Stock heads use the tapered plug.
I run a gasket plug, .75 reach in my Trickflows. A cold range 6 sounds fine.
Do a search on your heads and plugs.
Something like:
Autolite AR3923 - Autolite Racing Spark Plugs - Overview - SummitRacing.com
or
NGK Spark Plugs 6962 - NGK V-Power Spark Plugs - Overview - SummitRacing.com
Stock heads use the tapered plug.
I run a gasket plug, .75 reach in my Trickflows. A cold range 6 sounds fine.
Do a search on your heads and plugs.
03-13-2012, 09:51 PM
#6
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Join Date: Dec 1999
Location: Upstate New York,USA
Posts: 1,791
Re: ngk tr6 or autolite AR103...std copper core..which is the better for boost?
The non-standardization of terms and enumerating heat ranges is maddening. I have rare Canfield LT1 heads on my car now and some TFS 23 LT1's that are about to go on. I asked around and found most references pointed to a AR3910 Gasket plug with .750 (aka 3/4" reach) length, 14mm thread. These plugs were $3.50 EACH and fouled in no time. After lots of reading, I found the Autolite 65's are the perfect plug for my turbocharged street car. It's a cheap plug(about $1.22 each), the color on them after 6 months is still a light tan.
03-14-2012, 09:06 AM
#7
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Join Date: Oct 2000
Posts: 219
Re: ngk tr6 or autolite AR103...std copper core..which is the better for boost?
The non-standardization of terms and enumerating heat ranges is maddening. I have rare Canfield LT1 heads on my car now and some TFS 23 LT1's that are about to go on. I asked around and found most references pointed to a AR3910 Gasket plug with .750 (aka 3/4" reach) length, 14mm thread. These plugs were $3.50 EACH and fouled in no time. After lots of reading, I found the Autolite 65's are the perfect plug for my turbocharged street car. It's a cheap plug(about $1.22 each), the color on them after 6 months is still a light tan.
03-14-2012, 07:21 PM
#8
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Join Date: Dec 1999
Location: Upstate New York,USA
Posts: 1,791
Re: ngk tr6 or autolite AR103...std copper core..which is the better for boost?
I pull my plugs for a visual inspection periodically and the color is a light tan. When I was using the colder plugs, they fouled fairly quickly. Black, sooty and it causes misfires. Now it's perfect.
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