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Author Topic:   Spark Plugs
Dirt Maniac

Total posts: 127
posted October 31, 2004 09:49 PM  
ngk -bosch-splitfire and so on any body try them and have any good luck with them

I tried the ngk and didnt notice any extra H/P or cleaner burn

I run a Pure Stock chebby 350 rebuilt to 355 quad jet

racing is way too cool gave up golf for it

rico 08
Dirt Forum Champ
Total posts: 1139
posted November 01, 2004 07:18 AM  
I always run AC plugs,especially in a pure stock,that's what came in 'em and in my opinion seems to work the best.I use R44T for tapered seat heads and R44 for gasketed type heads.

Dirt Freak

Total posts: 217
posted November 03, 2004 10:54 AM  
AC GM , Champion dodge , autolite ford, bosch platinum trash can.

[This message has been edited by akadirtracer7 (edited November 03, 2004).]

Dirt Forum Champ
Total posts: 640
posted November 03, 2004 04:50 PM  
the last post is politicaly CORRECT

if every thing is under control your not fast enough

Dirt Roller

Total posts: 10
posted November 03, 2004 09:08 PM  
Has anyone ever ran autolite racing plugs in your SBC motor? I know a lot of people use them in San Antonio but that is asphalt.


Dirt Full Roller

Total posts: 52
posted November 04, 2004 03:19 PM  
autolite 25's never had a problem

Dirt Forum Racer

Total posts: 81
posted November 08, 2004 07:27 PM  
autolites and ngks seem to work the best for us

Dirt Forum Champ
Total posts: 753
posted November 09, 2004 04:52 PM  
I never had any luck with autolites. akadirtracer7 you are absolutely CORRECT!!! I run AC's. Even in my Ford Mustang. I have always ran AC's and never had any problems. I run IMCA mods and I use AC rapidfires, they work good for me.

Dirt Roller

Total posts: 6
posted November 11, 2004 06:53 PM  
we did a lot runs on the drag strip with ngk
they were worth a 10th of a second on a 10.50 car but if you gas fouled it 1 time we lost a lot of et, a good old ac plug does very well depending on your comp. you can go from 45's down to 42's , higher comp. lower # on ac plug hope this helps you

redneck racing
Dirt Forum Champ
Total posts: 860
posted November 19, 2004 04:44 PM  
Im not a fan of Champion plugs but I ran a set of the truck plugs and really liked them you just need to find the heat range for the fuel. Eddie

Dirt Roller

Total posts: 15
posted December 21, 2004 02:55 PM  
Originally posted by thomas66:
the plug you run depends on the octane of fule u run. i a ar 135 because i run 118 octane, a colder plug for higher octane a hotter plug for lower octane

Not sure I understand that post... but I run Autolite Racing AR 133 or 134s in mine. 10 to 11:1 CR. I've also run Accel 262 and 263s with decent results.

Running a hot plug with high octane fuel to keep it from fouling means your CR isn't high enough to need the high octane fuel or it's running rich. Actually, if the CR is high enough to need 118, a very cold plug would be needed (118 would only be required for like 14 to 16:1 CR)

Dirt Full Roller

Total posts: 70
posted December 22, 2004 10:00 AM  
I have ran the Autolite racing plugs for a couple of years now in a hobby stock class 9.5 to 1 motor. Been very happy but like Raz said, make sure you get the right heat range.

Dirt Roller

Total posts: 15
posted December 22, 2004 11:39 AM  
With Camel humps I run Autolite AR 73 withwith methanol or Autolite 72 with gas.

Dirt Freak

Total posts: 446
posted December 28, 2004 04:41 PM  
AR133=cold,AR134=med,AR135=warm tapered seat.

353=cold,303=hotter gasket seat

Dirt Maniac

Total posts: 120
posted January 04, 2005 08:57 AM  
autolite ar472 are working well for us with vortecs

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