SparkPlugs in a 4x4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Burt4x4 · 02-03-2009, 12:24 PM

Ok offroaders what plugs do you like and why?

I realize alot of plugs are very similar and most all will work fine.
I will be replacing all my plugs soon and thought I would get all the opinions out there

My engine: 1974 454 w/aftermarket EFI about 9:2 compression and Mallory ignition.

snj8198 · 02-03-2009, 02:34 PM

what heads are you running?

Burt4x4 · 02-03-2009, 02:35 PM

Shezz, I knew this was a boring post...

Ok so

NGK
Autolite
Bosh
Champion
AC Delco
Other?

Pick one!

Burt4x4 · 02-03-2009, 02:36 PM

Quote:

Originally Posted by snj8198

what heads are you running?

336781 w/oversized valves
The vlaves are 2.19 & 1.88
The heads were shaved and the block decked. Even had the intake shaved to line up the ports perfectly.
What you think?

snj8198 · 02-03-2009, 03:01 PM

well?? im running autolite 24's in mine. also running Eddie's rpm oval ports and their 3551 system. plugs seem to be the right heat range with 9.4 compression and short duration cam. 218/226, 510/510, 112 lsa. -steve

Burt4x4 · 02-03-2009, 03:22 PM

Cool, sounds like your engine is very close to mine..
Not too sure what all the numbers meen but here they are:
Gross Valve Lift: I .505 & E .505
Duration @ .006 Tappet Lift I 254 E 262
Duration @ 0.05 I 210 E 218
Lobe Lift I .297 E .297
lobe Separation 111
CompCam 11-231-3

Ok so one vote for Autolite!
Next?

Dooley · 02-03-2009, 03:23 PM

ACCEL 8178 and sometimes AC R44T.

Burt4x4 · 02-03-2009, 04:54 PM

Thanks
Spark plugs are boring to talk about I guess hahahaaa

68,69 K20 · 02-03-2009, 06:13 PM

I run Accel, not sure of the part# offhand, 72 350.

Blue_71 · 02-03-2009, 09:56 PM

this may offend some, so first off if it does im sorry, but from what ive seen and experienced for myself, i wouldn't put autolites in a lawn mower. they arent worth the metal they are made out of. i ONLY run AC Delcos. for your engine, i would say a R44TS, or because of the EFI i would recomend a CR43TS

NGK- good but overpriced
Bosch- okish, not highly recomended
champion- small lawn mower type engine only

Hoods69BadBowTie · 02-04-2009, 03:33 AM

I run only ngks or ac delcos. I am with him I have never heard anything good about autolites in my life just my .02 cents lol.

Burt4x4 · 02-04-2009, 10:30 AM

Cool!
Thanks for the opinions fellas

Anyone else?

snj8198 · 02-04-2009, 12:19 PM

crap...i new the autolite hits were on the way!

RED72blazer · 02-04-2009, 01:21 PM

NGK in all of my personal cars. And NGK in all of my customers cars unless they ask for something different or they aren't available.

Burt4x4 · 02-04-2009, 02:36 PM

NGK is winning

powerdriver 1958 · 02-04-2009, 04:07 PM

Went to the U.S.Nationals 2 years in a row and the most used plug in the sportsman classes was.......Autolite

snj8198 · 02-04-2009, 07:23 PM

Quote:

Originally Posted by powerdriver 1958

Went to the U.S.Nationals 2 years in a row and the most used plug in the sportsman classes was.......Autolite

yeah, what he said.

BurnoutNova · 02-04-2009, 09:19 PM

I only use AC plugs in my old stuff. In fact, I use whatever is OEM. Be it a car im working on at work, my own stuff, a friends car I'm helping wrench on, ect... OEM. My Toyota truck I have NGK.

AC plugs are great, even for engines that have been modified. I use AC R45TS plugs in my Nova, and it has a completely aftermarket ignition setup (MSD box, Accel dist, ect) lots of people say theyre only good for bone stock applications.

One thing to say away from is those splitfire, or Bosch +2 or +4 plugs... waste of money eclectricity ALWAYS follows the path of least resistance.. meaning only one electrode will fire anyway, so 2 or 4 is pointless. Hope I didnt seem like I was rambling.

62 short step · 02-04-2009, 10:31 PM

I use ac delco.

71 super · 02-04-2009, 11:14 PM

I really like autolites in motors with compression above stock,I also use them in my 92 softtail as well. With that said I have ac's in both stock motors in my 2wd and 4x4- ac seems to foul out quickly in higher compression engines.

vtblazer · 02-05-2009, 06:59 AM

Not a big block but I run ACDelco's in my TBI'd 383 and like em pretty well.

NGK's in all my toys though, snow machines, dirt bikes, 4wheelers etc.

Burt4x4 · 02-05-2009, 10:09 AM

Cool!
Thanks for the comments fellas!

I'll prolly try the NGKs
I am running Bosh Platnum in there now, same plug I ran in my 350. Never had an issue with them just looking for a change I guess.
I'll be pulling the plugs to adjust my rockers so I figured I'll toss in some new plugs while I gotum out

Burt

Burt4x4 · 02-05-2009, 01:32 PM

Here it is! The best spark plug ever:

And they only want $25 bucks EACH

I was reading some reviews on a corevette site and most all think this is a scam, marketing ploy...

Too rich for me to "try"...

dammitmitchell · 02-06-2009, 07:16 AM

i run accel shorties cause i refuse to hit my headers with a hammer..
with my luck a tire would somehow fall off..
but i like them.. it runs good and they havent burnt up even when i drive like a tard.. or when i drive like a little girl 9with kiddos in the truck)

383k5 · 02-10-2009, 10:13 AM

I run Ac delco R45ts to be exact, thats in my 383, and 350

02-03-2009, 12:24 PM	#1
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	SparkPlugs in a 4x4 Ok offroaders what plugs do you like and why? I realize alot of plugs are very similar and most all will work fine. I will be replacing all my plugs soon and thought I would get all the opinions out there My engine: 1974 454 w/aftermarket EFI about 9:2 compression and Mallory ignition. __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

02-03-2009, 02:34 PM	#2
snj8198 Registered User Join Date: Feb 2007 Location: Star Valley, WY Posts: 2,038	Re: SparkPlugs in a 4x4 what heads are you running? __________________ Steve 1971 GMC Longbox. Full Roller Stroker 489 w/ FiTech EFI, Chris Straub Cam/NV4500/205/D60/14B w. Grizzly Locker and 4.11's. 2" Lift on 33's

02-03-2009, 02:35 PM	#3
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: SparkPlugs in a 4x4 Shezz, I knew this was a boring post... Ok so NGK Autolite Bosh Champion AC Delco Other? Pick one! __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

02-03-2009, 03:01 PM	#5
snj8198 Registered User Join Date: Feb 2007 Location: Star Valley, WY Posts: 2,038	Re: SparkPlugs in a 4x4 well?? im running autolite 24's in mine. also running Eddie's rpm oval ports and their 3551 system. plugs seem to be the right heat range with 9.4 compression and short duration cam. 218/226, 510/510, 112 lsa. -steve __________________ Steve 1971 GMC Longbox. Full Roller Stroker 489 w/ FiTech EFI, Chris Straub Cam/NV4500/205/D60/14B w. Grizzly Locker and 4.11's. 2" Lift on 33's

02-03-2009, 03:22 PM	#6
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: SparkPlugs in a 4x4 Cool, sounds like your engine is very close to mine.. Not too sure what all the numbers meen but here they are: Gross Valve Lift: I .505 & E .505 Duration @ .006 Tappet Lift I 254 E 262 Duration @ 0.05 I 210 E 218 Lobe Lift I .297 E .297 lobe Separation 111 CompCam 11-231-3 Ok so one vote for Autolite! Next? __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

02-03-2009, 03:23 PM	#7
Dooley Registered User Join Date: Mar 2005 Location: North Coast Posts: 1,012	Re: SparkPlugs in a 4x4 ACCEL 8178 and sometimes AC R44T.

02-03-2009, 04:54 PM	#8
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: SparkPlugs in a 4x4 Thanks Spark plugs are boring to talk about I guess hahahaaa __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

02-03-2009, 06:13 PM	#9
68,69 K20 They call me the Breeze... Join Date: Jul 2007 Location: New York Posts: 2,251	Re: SparkPlugs in a 4x4 I run Accel, not sure of the part# offhand, 72 350. __________________ Mike 69 K20 "Beer is proof God loves us and wants us to be happy"....Ben Franklin

02-04-2009, 03:33 AM	#11
Hoods69BadBowTie Chevys Kick A$$ Join Date: Jan 2005 Location: Zootown, MT Posts: 12,699	Re: SparkPlugs in a 4x4 I run only ngks or ac delcos. I am with him I have never heard anything good about autolites in my life just my .02 cents lol. __________________ HOODS is what I answer too -'79, '77, '88 Pickup Sold, '85 Camaro, '83 T/A, '81,'83,'90 K5 Blazer All Sold -'79 3/4 ton "Big Yellow Bananna" Lifted 4spd. 39.5 TSL Swampers, The money Pit -'86 K5 Blazer Silverado 6.2 4" lift 35"s -'95 Ext. Cab Shorty 4" Tuff Country rolling 35" M/T's -'83 Monte Carlo T-Tops. 126,500 Original Miles -LATER I would rather push a Chevy then drive a ford!!

02-04-2009, 10:30 AM	#12
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: SparkPlugs in a 4x4 Cool! Thanks for the opinions fellas Anyone else? __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

02-04-2009, 12:19 PM	#13
snj8198 Registered User Join Date: Feb 2007 Location: Star Valley, WY Posts: 2,038	Re: SparkPlugs in a 4x4 crap...i new the autolite hits were on the way! __________________ Steve 1971 GMC Longbox. Full Roller Stroker 489 w/ FiTech EFI, Chris Straub Cam/NV4500/205/D60/14B w. Grizzly Locker and 4.11's. 2" Lift on 33's

02-04-2009, 01:21 PM	#14
RED72blazer urban fourwheelin Join Date: Aug 2002 Location: Seattle Posts: 1,007	Re: SparkPlugs in a 4x4 NGK in all of my personal cars. And NGK in all of my customers cars unless they ask for something different or they aren't available. __________________ 1972 K5 Blazer with Cummins 4BT, NV4500 swap in the parts gathering stage.

02-04-2009, 02:36 PM	#15
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: SparkPlugs in a 4x4 NGK is winning __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

02-04-2009, 04:07 PM	#16
powerdriver 1958 Kid's Mechanic Join Date: Nov 2006 Location: Kansas City Posts: 8,241	Re: SparkPlugs in a 4x4 Went to the U.S.Nationals 2 years in a row and the most used plug in the sportsman classes was.......Autolite

02-04-2009, 09:19 PM	#18
BurnoutNova Registered User Join Date: Mar 2004 Location: CA Posts: 2,057	Re: SparkPlugs in a 4x4 I only use AC plugs in my old stuff. In fact, I use whatever is OEM. Be it a car im working on at work, my own stuff, a friends car I'm helping wrench on, ect... OEM. My Toyota truck I have NGK. AC plugs are great, even for engines that have been modified. I use AC R45TS plugs in my Nova, and it has a completely aftermarket ignition setup (MSD box, Accel dist, ect) lots of people say theyre only good for bone stock applications. One thing to say away from is those splitfire, or Bosch +2 or +4 plugs... waste of money eclectricity ALWAYS follows the path of least resistance.. meaning only one electrode will fire anyway, so 2 or 4 is pointless. Hope I didnt seem like I was rambling.



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02-04-2009, 10:31 PM	#19
62 short step Senior Member Join Date: Aug 2005 Location: Greenwell Springs, Louisiana Posts: 2,882	Re: SparkPlugs in a 4x4 I use ac delco. __________________ www.louisianaclassictruckclub.com 1965 c-10 86 chevy c/k 20

02-04-2009, 11:14 PM	#20
71 super Registered User Join Date: Sep 2005 Location: Canton North carolina Posts: 3,075	Re: SparkPlugs in a 4x4 I really like autolites in motors with compression above stock,I also use them in my 92 softtail as well. With that said I have ac's in both stock motors in my 2wd and 4x4- ac seems to foul out quickly in higher compression engines. __________________ 67 blue step side- bb 68 gold and white swb cst anniversary 68 custom swb hot rod Ls swap 69 swb cst 6 cylinder/ overdrive 69 black/black cst bb swb 70 orange and white cst Canada built truck swb bb 71 black and white super swb bb 71 red and white super swb 72 green and white super swb 4x4 62 nova wagon 400 series Ls swapped 68 Camaro 327/4 speed- 1 owner, original paint 66 Volkswagen bettle 69 auto stick Volkswagen Beetle

02-05-2009, 06:59 AM	#21
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,538	Re: SparkPlugs in a 4x4 Not a big block but I run ACDelco's in my TBI'd 383 and like em pretty well. NGK's in all my toys though, snow machines, dirt bikes, 4wheelers etc.

02-05-2009, 10:09 AM	#22
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: SparkPlugs in a 4x4 Cool! Thanks for the comments fellas! I'll prolly try the NGKs I am running Bosh Platnum in there now, same plug I ran in my 350. Never had an issue with them just looking for a change I guess. I'll be pulling the plugs to adjust my rockers so I figured I'll toss in some new plugs while I gotum out Burt __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

02-05-2009, 01:32 PM	#23
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: SparkPlugs in a 4x4 Here it is! The best spark plug ever: And they only want $25 bucks EACH I was reading some reviews on a corevette site and most all think this is a scam, marketing ploy... Too rich for me to "try"... __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks Last edited by Burt4x4; 02-05-2009 at 01:40 PM.

02-06-2009, 07:16 AM	#24
dammitmitchell the pollock Join Date: May 2008 Location: abilene, texas Posts: 4,423	Re: SparkPlugs in a 4x4 i run accel shorties cause i refuse to hit my headers with a hammer.. with my luck a tire would somehow fall off.. but i like them.. it runs good and they havent burnt up even when i drive like a tard.. or when i drive like a little girl 9with kiddos in the truck) __________________ Jack of ALL trades, Master of none.. (but one... procrastination) Army vet 02-08 RIP El Jay! Miss you brother! http://67-72chevytrucks.com/vboard/s...d.php?t=343538 http://67-72chevytrucks.com/vboard/s...d.php?t=386042

02-10-2009, 10:13 AM	#25
383k5 Registered User Join Date: Feb 2009 Location: Chuluota Fl Posts: 14	Re: SparkPlugs in a 4x4 I run Ac delco R45ts to be exact, thats in my 383, and 350 __________________ 84383/465/208 D44/14b Detroits, 4 wheels discs, 8" front, 6" rear, 37" Irok Radials 96 ranger 4cylinder with the flowmaster. It's my race truck 64 C10...random pieces strew about.

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