Plugs? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

JeffroMart · 11-18-2009, 01:08 PM

I just recently got a '68 with a 350. I wanted to change out the plugs as I am unsure the last time they were changed. What brand would you guys suggest to use?

2010 SSRS · 11-18-2009, 01:13 PM

Autolite

Dave Coyle · 11-18-2009, 02:18 PM

AC is my choice.

Logan-69-Camaro · 11-18-2009, 04:52 PM

x2 on the Autolite

anthonybyram · 11-18-2009, 07:11 PM

AC/delco

Camaro21 · 11-18-2009, 07:17 PM

AC Delco

Swifty · 11-18-2009, 10:54 PM

A/C delco

JeffroMart · 11-19-2009, 05:49 PM

Thanks guys for all the input, so say I decided to go A/C delco, is there any certain type, or should I just get like normal ones for this engine? I just want to make sure I get the right ones

Stingr69 · 11-20-2009, 07:31 AM

If you are going to get the AC's then try to find the 45 heat range. The lower heat ranges (43) that were stock back in the day are too cold for todays gas. You may get some fouling with the 43's. I had a popping in the exhaust at idle that just would not go away until I put the 45's in there.

You might try experimenting with the Autolites. I find they have a wider heat range and that is good to prevent fouling. They are my preferred brand of plug now.

-Mark.

anthonybyram · 11-20-2009, 08:03 PM

As Stinger69 said, you will need to go with a little hotter plug than what you used to run. Im running a R45 TSX R45-heat range, TS-tapered seat, X-longer electrode length to reach further down in the combustion chamber. I can run these X-plugs because I have a relief in my pistons. On some engines this isnt possible due to the area of the combustion chamber/and piston clearance. Im running 0.30 over Speed-Pro pistons in a 454, approx. 9.2 compression ratio with 0.039 head gasket crush thickness. With todays fuels and the alcohol content you can run a hotter plug and not have to worry about spark knock or run-on.

11-18-2009, 01:08 PM	#1
JeffroMart Drives: 68 Camaro Join Date: Nov 2009 Location: Maryland Posts: 3	Plugs? I just recently got a '68 with a 350. I wanted to change out the plugs as I am unsure the last time they were changed. What brand would you guys suggest to use?

11-18-2009, 04:52 PM	#4
Logan-69-Camaro Drives: 1969 Camaro Resto-Mod, 468 BBC Join Date: Jun 2009 Location: Midland, TX Posts: 49	x2 on the Autolite __________________ 1969 Chevrolet Camaro Base Model -Originally Frost Green w/a 307 and Th-350 -Norwood Ohio Production Car -Came with no rear spoiler, no cowl hood, standard interior options -My Plans: 468 BBC, TH-350 3400 stall, Moser 12 Bolt Posi, Paint (undecided), American Racing 18" TT2's Project: BadHbt

11-18-2009, 10:54 PM	#7
Swifty Casue six aint enough Drives: 1967 GMC pickup/ 366 Join Date: Aug 2009 Location: Carolina Posts: 16	A/C delco __________________ “The object of war is not to die for your country but to make the other bastard die for his.” ~Gen. Patton

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JeffroMart Drives: 68 Camaro Join Date: Nov 2009 Location: Maryland Posts: 3	Thanks guys for all the input, so say I decided to go A/C delco, is there any certain type, or should I just get like normal ones for this engine? I just want to make sure I get the right ones

11-20-2009, 07:31 AM	#9
Stingr69 '69 Owned Since '79 Drives: '69 Z/28 LeMans Blue w/White Join Date: Oct 2008 Location: LR AR Posts: 1,848 View My Garage	If you are going to get the AC's then try to find the 45 heat range. The lower heat ranges (43) that were stock back in the day are too cold for todays gas. You may get some fouling with the 43's. I had a popping in the exhaust at idle that just would not go away until I put the 45's in there. You might try experimenting with the Autolites. I find they have a wider heat range and that is good to prevent fouling. They are my preferred brand of plug now. -Mark.

11-20-2009, 08:03 PM	#10
anthonybyram Drives: 1972 Z28, torch red,454 Join Date: Apr 2009 Location: mexico,mo Posts: 562 View My Garage	As Stinger69 said, you will need to go with a little hotter plug than what you used to run. Im running a R45 TSX R45-heat range, TS-tapered seat, X-longer electrode length to reach further down in the combustion chamber. I can run these X-plugs because I have a relief in my pistons. On some engines this isnt possible due to the area of the combustion chamber/and piston clearance. Im running 0.30 over Speed-Pro pistons in a 454, approx. 9.2 compression ratio with 0.039 head gasket crush thickness. With todays fuels and the alcohol content you can run a hotter plug and not have to worry about spark knock or run-on.