Spark Plugs: Autolite Heat Ranges? - Team Camaro Tech
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post #1 of 8 (permalink) Old Dec 25th, 04, 12:21 PM Thread Starter
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Tim
 
Join Date: Mar 2001
Location: Florida
Posts: 182
Question

Simple question...

What are the heat range part numbers for Autolite plugs?

I have a set of AFR 210 cylinder heads and AFR recommends starting with AR3910 Autolite plugs.

I have fouled a few plugs while I try to sort the tuning...is the 3910 a cold plug or?

My local Autozone/Oreilly/Advance aren't any help especially these plugs are already special ordered.

In other words, how does Autolite number their ranges? 3920, 3930, etc?

Thanks!

1969 Nova SS 350
EFI 407/TKO600/4.11
11.43 at 121 MPH

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post #2 of 8 (permalink) Old Dec 25th, 04, 04:03 PM
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Have you tried www.autolite.com? Looks like there is lots of info there. If you are brand loyal, most of the major spark plug manufacturers have good technical info on their plugs. You could start by crossing your autolite number to whomever's product you choose. Unfortunately, each manufacturer has their own method of heat-ranging plugs, but their tech documents usually explain the details.

Dave
========================
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #3 of 8 (permalink) Old Dec 27th, 04, 08:01 AM
 
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It's a cold plug. On a scale of 1-10 10 being hot it's a 2. I have a catalog.
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post #4 of 8 (permalink) Old Dec 27th, 04, 08:14 AM Thread Starter
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Tim
 
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Heh, thanks for the link...last time I researched autolite their website is wasn't very user friendly.

This one I can deduce that they also offer a AR 3911 which is indeed a hotter plug.

Can you tell me (using your catalog) if they have a whole range of plugs such as AR 3911-AR 3919-just different heat ranges?

Thanks a bunch...my Autozone friend said "that plug is not available (speaking of AR 3910) because it isn't in my computer...." [img]smile.gif[/img]

1969 Nova SS 350
EFI 407/TKO600/4.11
11.43 at 121 MPH

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post #5 of 8 (permalink) Old Dec 27th, 04, 11:02 AM
 
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The 3910 and 3911 are power tip non resistors. 3922-3927 are resistor power tips. If you have an MSD or stero you want these anyway. 3923-3924 is mid range and should do well on a dual purpose car. [img]graemlins/beers.gif[/img]
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post #6 of 8 (permalink) Old Dec 29th, 04, 10:20 PM
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I'm running the 3926 - (stock for a LT1 vette) with great results!!!!!

Rat Touring 1969 Camaro X44 496 Richmond Super T10 Plus 4-Speed 3.55 4 wheel disc
..and sporting all new suspension, wheels, etc etc... take a look...


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post #7 of 8 (permalink) Old Jan 2nd, 05, 05:32 PM Thread Starter
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Tim
 
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Excellent!

I picked up a set of 3926's...I think they will do the trick and because the store had that number in stock. Just trying to get the part throttle tuned!

Thanks

1969 Nova SS 350
EFI 407/TKO600/4.11
11.43 at 121 MPH

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post #8 of 8 (permalink) Old Jan 9th, 05, 06:18 AM Thread Starter
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Tim
 
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Well, put ~50 miles on those plugs and what a night a day difference.

Again, mainly concerned about getting it tuned other than WOT...no more fouling, rev's cleanly, and starts better.

Thanks!

1969 Nova SS 350
EFI 407/TKO600/4.11
11.43 at 121 MPH

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