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DRR / Crew
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Anyone try these Autolite X Racing Plugs shown below? I've heard some good results. I'd like to think they'd last longer than 70-100 runs with a grid.

 
Posts: 2214 | Location: Gallatin, TN - U.S.A. | Registered: October 12, 2009Reply With QuoteReport This Post
DRR S/Pro
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Not that the below has much to do with a race engine, I found the spark jump and flame propagation for the Autolite X interesting.




Illegitimi non carborundum
 
Posts: 2385 | Location: OKC, OK | Registered: February 15, 2008Reply With QuoteReport This Post
DRR Pro
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They ain’t no damn better an it feels like your about to strip your heads trying to get the in....I quit using them for this reason
 
Posts: 1275 | Location: USA | Registered: December 04, 2008Reply With QuoteReport This Post
DRR S/Pro
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Here are a few questions that you might be able to provide some additional information.

The Autolite X spark plug has a fairly long non threaded ring that extends out into the combustion chamber. That, coupled with the 360 degree firing design extends the plug tip deeper into the combustion chamber. That might become a piston clearance issue in some high compression applications. Comparing the depth of the Autolite X plug, side by side to that of a side mounted projected tip spark plug might give you have a better comparison in determining piston clearance.

The real problem is that there is no advantage to indexing the Autolite X plug to gain piston clearance, you can't re-position the ground strap, it's a 360 degree ground strap.

The E3 racing spark plug ground straps (all three) look as if they extend even deeper into the combustion chamber. When installing them in high compression engine you would have to clock the engine so that no piston was at TDC.

The Pulsar spark plug is the most interesting of the three. It doesn't seem to have the piston clearance issue when properly indexed. The question is how well does it perform in a high compression, high RPM application. Another question is how many heat ranges are available.

Not trying to play Devils Advocate, I am really interested in finding out more about these spark plugs.

Bob
 
Posts: 3240 | Location: Lakeside, Ca | Registered: February 15, 2003Reply With QuoteReport This Post
DRR S/Pro
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Have a set for the TS car. Just swapped to 3910. We've got other issues to sort out so not time to test the x plugs. I know plenty of fast superstock/stock who run them.


California Screaming!
Raceless in California!
 
Posts: 4709 | Location: Vacaville  | Registered: January 07, 2004Reply With QuoteReport This Post
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my opinion is they are a gimmick just like split fire and now E3.
 
Posts: 13522 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Sportsman
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Ngk did the worst in the lawn mower. Generator. And go cart in the video. Just kidding. As I stated in another thread I am trying the e3 plugs and do notice some improvements. Did notice they were more air sensitive but gonna try them again this week. Last time I run the air was really really sh1tty and went to just sh1tty so the air may have been out of my jet ideal and come closer to my jet if that makes sense. I like aspects of the e3 but will go back to ngk if my car continues to move more than I like.

ep- I was digging the side exit exhaust on the rv
 
Posts: 777 | Location: dodging double wides... | Registered: November 28, 2007Reply With QuoteReport This Post



DRR Top Comp
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Autolite X

Is the same design plug they run NHRA Pro Stock.

 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
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quote:
Originally posted by pauley:
Ngk did the worst in the lawn mower. Generator. And go cart in the video. Just kidding. As I stated in another thread I am trying the e3 plugs and do notice some improvements. Did notice they were more air sensitive but gonna try them again this week. Last time I run the air was really really sh1tty and went to just sh1tty so the air may have been out of my jet ideal and come closer to my jet if that makes sense. I like aspects of the e3 but will go back to ngk if my car continues to move more than I like.

ep- I was digging the side exit exhaust on the rv
You’ll go back to NGK...
 
Posts: 1275 | Location: USA | Registered: December 04, 2008Reply With QuoteReport This Post
DRR Elite
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There's nothing magic about spark plugs just as there's nothing magic about shocks. Big Grin
 
Posts: 13522 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Pro
Picture of Alaskaracer
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I run ngk while tuning because they are easier to read and I can get them cheap. Once my tune is happy I switch to autolite racing plugs. Not much difference other than cutback ground strap but they do last longer than the ngk.


Mark Goulette
Owner/Driver of the Livin' The Dream Racing dragster
www.livinthedreamracing.com
"Speed kills but it's better than going slow!"
Authorized Amsoil Retailer
 
Posts: 1561 | Location: Back home in Alaska! | Registered: February 13, 2011Reply With QuoteReport This Post
DRR Trophy
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quote:
Originally posted by 1320racer:
my opinion is they are a gimmick just like split fire and now E3.


you left out the j.c.whitney "fire injectors"! I agree, they're all gimmicks with different packaging.


"Trust the Plan"
 
Posts: 31 | Location: Newville Pa | Registered: August 12, 2017Reply With QuoteReport This Post
DRR Elite
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yep, same gimmick repackage every decade for the last 40+ years.
 
Posts: 13522 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Trophy
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They are not a gimmick, but its about 15 year old Nascar race day plug stuff. They are usually with in 5 horsepower on the dyno compared to non X plug.


Duane Allen
 
Posts: 29 | Location: Sandston VA | Registered: December 14, 2006Reply With QuoteReport This Post



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Gimmick or not, I wouldn't put an autolite in anything but a trash can. I had a miss a few years ago that would come and go. I changed everything I could including multiple sets of plugs. A friend recommended that I try equivalent NGK plugs and it hasn't had the issue since. I can understand a bad plug every so often but to have multiples in multiple sets is unforgivable in my eyes.
 
Posts: 67 | Location: Glen Burnie | Registered: May 30, 2011Reply With QuoteReport This Post
DRR S/Pro
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I check every spark plug with an ohm meter before it's installed in the race car engine. Years ago I bought a set of AC Delco plugs for my 350 ci '56 Chevy PU. One of the plugs didn't have any threads.

Bob

This message has been edited. Last edited by: RPROGAS,
 
Posts: 3240 | Location: Lakeside, Ca | Registered: February 15, 2003Reply With QuoteReport This Post
DRR S/Pro
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quote:
Originally posted by Duane1791:
They are not a gimmick, but its about 15 year old Nascar race day plug stuff. They are usually with in 5 horsepower on the dyno compared to non X plug.


SHHHHHH Duane! Nascar is light years ahead of development. Cool stuff!
Its something that most don't give a second thought about.


California Screaming!
Raceless in California!
 
Posts: 4709 | Location: Vacaville  | Registered: January 07, 2004Reply With QuoteReport This Post
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quote:
Alaskaracer

how far u cut strap back
 
Posts: 30 | Location: tennessee | Registered: November 29, 2008Reply With QuoteReport This Post
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Picture of CAD
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The autolite race plug strap is cut back out of the box. Careful gapping...
 
Posts: 151 | Location: Omaha NE | Registered: October 31, 2009Reply With QuoteReport This Post
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Picture of nomad
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Ernie Griggs runs those in his Camaro. Our engine builder likes them.


nomad
Bruce Guertin


Easily distracted by bright shiny objects.

Wife says I'm a new adventure every day.


Call Automotive Performance Engines for all your complete engine building, dyno service needs 863-967-8781
 
Posts: 2546 | Location: Auburndale, Florida | Registered: October 19, 2004Reply With QuoteReport This Post
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