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Author Topic:   Plugs
eighty
Member
posted June 14, 2003 01:44 AM
Just finished my new 355, forged flat-tops,
6" rods, 041 heads with 2.02-1.60 valves.
What plugs should i use. I ran Autolite 303 in my last motor.Is this a good plug range?
Are other plugs better? ok motor guru's let hear some opinions
Thank #80


jhon hollomon
Member
posted June 14, 2003 02:14 AM
Are you running gas or alcohol?


ctfarm
Member
posted June 14, 2003 12:08 PM
I've always had good luck running Champion J6C on gas and J4C On alcohol with this same engine combination.



eighty
Member
posted June 15, 2003 02:20 AM
Im Sorry all, I run racing fuel gas


racer17j
Member
posted June 15, 2003 02:59 AM
ac r45ts


budman14
Member
posted June 15, 2003 10:11 AM
a/c delco r45ts 5/8 plug an r45s for 13/16 plugs


dirtracer7
Member
posted June 15, 2003 07:10 PM
Watch those champion plugs I have seen alot of the porcelin on the center electrode fall apart on grocery getters ,it problably wouldn't do a motor @ 6500 rpms much good.


eighty
Member
posted June 18, 2003 08:10 PM
So nobody likes the Autolites?
I always heard AC plugs foul out to easy? Is this a myth? Anybody Else???
Thanks
80


Pickel
Member
posted June 18, 2003 08:15 PM
I use to run autolites and loved them. I always ran the big plug. Over the years I've tried all the plugs but this year I am going back to running the autolites. I just need to figure out which ones I need to run in a sportsman 2 heads.


jay116
Member
posted June 18, 2003 09:25 PM
I like AC plugs
I even run them in my MOPAR.

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Jason Boivin
http://www.rcracing-team.com


outlawstock17
Member
posted June 18, 2003 09:44 PM
i've used the autolite racing plugs for years. never had a problem with them.


DMA Racing
Member
posted June 18, 2003 09:45 PM
i have always used the 303's. i have went to the pro action head and i'm using an NGK plug r56748 or r567489 haven't raced the motor yet, sounds good in the shop,try it out this weekend.


Speed Racer X
Member
posted June 18, 2003 10:19 PM
Autolite 135 here


ctfarm
Member
posted June 18, 2003 11:21 PM
Been running Champion plugs for more than 20 years,never had a problem,we run the same set all season.



eighty
Member
posted June 19, 2003 03:07 PM
Thanks All,
I guess I will use the autolites
they worked good for me last year
Again thanks to all for your input!!!
80


rico 08
Member
posted June 19, 2003 09:39 PM
45 is a little too hot for racing i'd go with a 44.IMHO


BayouGent
Member
posted June 20, 2003 12:29 AM
I agree with rico on the 45's being a little too hot. Chevrolet used to recommend 43's on the old 11:1 motors, and you're not too far off from that compression ratio with your setup. I will buy autolites when Delco's aren't available.


waltonjr1
Member
posted June 23, 2003 07:24 PM
Whats up murray,ive always ran autolite 25 or 26 and they work very well.

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DEANJR#22


Dirt-Tracker
Member
posted June 23, 2003 10:34 PM
Autolite 134-------won my first feature last sat. night!!!!

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"Somedays your the dog, and somedays your the fire hydrant!!!"

www.geocities.com/albertson28racing

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