Which Autolite plug is colder?

Posted By: '72CudaRacer

Which Autolite plug is colder? - 07/01/11 11:12 PM

AR3910 or AR3924? Only problem with running a too cold of a plug is fouling, Correct? But running too hot of a plug eguals nothing but trouble?

Thanks, Brian Dunnigan

Posted By: mopar65

Re: Which Autolite plug is colder? - 07/01/11 11:28 PM

the auto lite chart i have shows the AR3924 as the hotest plug. Mopar65

Posted By: Labratt

Re: Which Autolite plug is colder? - 07/01/11 11:36 PM

Bobby..I run the AR3924 plug in my GTX. Eddy heads with 10.25 compression. Is there a BETTER heat range for street driving that you're aware of?

THANKS!

Posted By: mopar65

Re: Which Autolite plug is colder? - 07/01/11 11:50 PM

Quote:

Bobby..I run the AR3924 plug in my GTX. Eddy heads with 10.25 compression. Is there a BETTER heat range for street driving that you're aware of? THANKS!

Randy here is the chart i have. but it is the race plug chart. heading out the door to go fishing. but i am sure somebody smarter than me can recomend a plug for you. thanks Bobby

Posted By: mopar65

Re: Which Autolite plug is colder? - 07/01/11 11:51 PM

here is the conversion chart i have. thanks Bobby

Posted By: mopar65

Re: Which Autolite plug is colder? - 07/01/11 11:53 PM

randy i am running a NGK R5671A-7 in my aluminum headed 11.1 440.thanks Bobby

Posted By: therocks

Re: Which Autolite plug is colder? - 07/02/11 01:31 AM

I run NGK R5671A-8s in my Stealth headed 12.5 440.Been in 3 years and no problems.Street and strip.Rocky