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Author Topic:   AC Delco plug heat range Identifying
DangerZoneRacing
Dirt Maniac

Total posts: 176
posted August 05, 2005 08:26 AM  
What is a R45TS...and the R45TSX? Is a R44 hotter? In other words....which tells if the plug is hotter.....the numbers or letters? If its the numbers is the lower number hotter or cooler? What do you guys usually gap yours at?

leapinlizard
Dirt Freak

Total posts: 402
posted August 05, 2005 10:20 AM  
44 is colder and 46 is hotter. The TS means tapered seat.

DangerZoneRacing
Dirt Maniac

Total posts: 176
posted August 05, 2005 04:13 PM  
thank you leapin....what does the "X" stand for...i have a set with the "X" and a set without....they dont look any different.

leapinlizard
Dirt Freak

Total posts: 402
posted August 05, 2005 04:47 PM  
Xperimental? lol

Really, I don't know.

DangerZoneRacing
Dirt Maniac

Total posts: 176
posted August 05, 2005 10:03 PM  
Well I called my parts guy and he told me the "X" means Xtra gap. What do you usually run your gaps at? Would the extra big gap help? I dont know if I dare try em...I mean...i trust the old tried and true method and dont know if I could trust running say a 50 thousands gap on a plug without running a serious high voltage coil. This is only for a .030 over 350 with flat tops and 882 heads with a .490 lift comp cam and a quadrajunk 4 barrel. I am running a Accel high voltage coil....but I dont think that will matter. What ya think leapin?

stockcar5
Dirt Forum Champ
Total posts: 578
posted August 06, 2005 11:23 AM  
x= wide gap for hei ignition systems.
here is a link withg all the info you need.
http://www.acdelco.com/html/pi_plugs_ident.htm

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www.sathoffracing.com

DangerZoneRacing
Dirt Maniac

Total posts: 176
posted August 06, 2005 12:20 PM  
Thanks stockcar5 I appreciate it.....still dont know about running the "X" type plug. Do you think its a good plug or should a guy just stay away from it?

leapinlizard
Dirt Freak

Total posts: 402
posted August 06, 2005 01:30 PM  
I would'nt try it myself. Don't see how it could help on a already taxed ignition system.

DangerZoneRacing
Dirt Maniac

Total posts: 176
posted August 07, 2005 08:57 AM  
Well I went with the R45TS's and it must of been a good choice.....won the feature by half a lap last nite. I let of with half a lap to go and coasted across the finish line still far enuff ahead lol. I went with a .035 gap. Does that sound right or should a guy run .045? thanks again guys. They way I see it you guys helped me get in the winners circle. Now if I could only win every nite by that much.

eenfield
Dirt Maniac

Total posts: 116
posted August 07, 2005 07:59 PM  
Personally, I would only run the .030-.035" gap. This will help keep the plug firing under increased loads.

Higher compression, higher RPM, higher octane fuel and lower voltages( no alternater) can all contribute to a misfire due to lack of spark. Keep the gap tight and the spark hot. Now if you have twin 44 amp magnetos that melt your plugs by the halfway point(it does happen) like the fuel car boys do, or some other form of serious high output ignition then I would say sure open em up! JMO....

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