NGK TR55 3951 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

bowtiesonly · 05-22-2019, 06:46 PM

Looking for some insight into these, I have acquired a free set of NGK tr55 3951 copper plugs and was told they are fine for l99 or ls3, but i see they are .55 or so, i know my factory plugs are 040 so wondering if this bigger gap is going to cause an issue. car is full bolt on with a tune. thanks for any info

davidscamaro · 05-22-2019, 08:34 PM

The tr55 are fine to use on any ls motor that is in the 5 heat range , .50-.55 gap should not cause any issues , can always tap them down to .40 if you wish

davidscamaro · 05-22-2019, 08:38 PM

If your wondering the heat range go's up for every 100hp you add over stock , if your only bolt ons the 5 heat range is ok even cam cars do fine with 5 heat range

christianchevell · 05-23-2019, 06:51 AM

Frankly the problem with the coppers is they have to be changed out so often compared to the iridium …… I run tr6ix, and they can last a long time, with coppers …..meh …. the price would be a indicator or the life and fouling being a lot more...the car came with iridium..... though its brittle its very hard and can take a lot of heat and last a long time. SO don't gap iridium btw its a wire and breaks. free is a good price and...well theres a reason...….. good luck

1JEWLDSSRS · 05-23-2019, 07:43 AM

I ran these plugs in my FBO Camaro, L99 for 6 years with no issues, only had to change them once in that time frame. Now I'm cammed and stalled with a big intake and use the 6's... Should be fine..

bowtiesonly · 05-23-2019, 02:20 PM

Thanks for all the information, I'll give them a shot and can always change em back if need be.

05-22-2019, 06:46 PM	#1
bowtiesonly Drives: 2012 Camaro 2ss Join Date: May 2012 Location: Arkansas Posts: 225 View My Garage	NGK TR55 3951 Looking for some insight into these, I have acquired a free set of NGK tr55 3951 copper plugs and was told they are fine for l99 or ls3, but i see they are .55 or so, i know my factory plugs are 040 so wondering if this bigger gap is going to cause an issue. car is full bolt on with a tune. thanks for any info __________________ 2012 2ss , long tube headers , summit x pipe ,borla mufflers, vararam intake, vmax ported throttle body rdp motorsports dynosteve tuned, BMR trailing arms and bushings elite engineering catch can. [Ifirst camaro ]2012 LT LFX, nytrex wet system ,GPI dyno tune, Injen longtube intake, Dynomax axle back exhaust, Vmax ported throttle body, elite engineering catch can.

05-22-2019, 08:34 PM	#2
davidscamaro Drives: 2010 SS/RS M6 BIG cam Join Date: Mar 2016 Location: McDonald's DT Posts: 857	The tr55 are fine to use on any ls motor that is in the 5 heat range , .50-.55 gap should not cause any issues , can always tap them down to .40 if you wish __________________ BIG cam ...... 305 45 18 Mickys ...... BMR suspensions

05-22-2019, 08:38 PM	#3
davidscamaro Drives: 2010 SS/RS M6 BIG cam Join Date: Mar 2016 Location: McDonald's DT Posts: 857	If your wondering the heat range go's up for every 100hp you add over stock , if your only bolt ons the 5 heat range is ok even cam cars do fine with 5 heat range __________________ BIG cam ...... 305 45 18 Mickys ...... BMR suspensions

05-23-2019, 06:51 AM	#4
christianchevell old school chevy rodder Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012 Location: Oregon Posts: 5,587 View My Garage	Frankly the problem with the coppers is they have to be changed out so often compared to the iridium …… I run tr6ix, and they can last a long time, with coppers …..meh …. the price would be a indicator or the life and fouling being a lot more...the car came with iridium..... though its brittle its very hard and can take a lot of heat and last a long time. SO don't gap iridium btw its a wire and breaks. free is a good price and...well theres a reason...….. good luck __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data, Carbon, Nav, RotoFab Dry CAI, Elite x2, Borla ATK, Driveshaft shop

05-23-2019, 07:43 AM	#5
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,435	I ran these plugs in my FBO Camaro, L99 for 6 years with no issues, only had to change them once in that time frame. Now I'm cammed and stalled with a big intake and use the 6's... Should be fine.. __________________ TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.

05-23-2019, 02:20 PM	#6
bowtiesonly Drives: 2012 Camaro 2ss Join Date: May 2012 Location: Arkansas Posts: 225 View My Garage	Thanks for all the information, I'll give them a shot and can always change em back if need be. __________________ 2012 2ss , long tube headers , summit x pipe ,borla mufflers, vararam intake, vmax ported throttle body rdp motorsports dynosteve tuned, BMR trailing arms and bushings elite engineering catch can. [Ifirst camaro ]2012 LT LFX, nytrex wet system ,GPI dyno tune, Injen longtube intake, Dynomax axle back exhaust, Vmax ported throttle body, elite engineering catch can.