Spark plugs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

409biscayne · 10-03-2006, 10:54 PM

Need to change plugs in the 68 , what brand / part nbr are y'all using ? It's a stock 396 .
Thanks ........................................ 409

dougs69c10 · 10-03-2006, 11:10 PM

just use stock ac delco copper plugs.

I doubt they would use like a cr45ts but something along those linex

71Dragtruck · 10-03-2006, 11:58 PM

Quote:

Originally Posted by 409biscayne

Need to change plugs in the 68 , what brand / part nbr are y'all using ? It's a stock 396 .
Thanks ........................................ 409

Use a NGK BCPR6ES, they will fit your head, and have the smaller 5/8 wrench flat making it easier to work with, a gift if you run headers.

Werewolf · 10-04-2006, 08:18 AM

NGK's are .. ironically .. a good plug for Chev small blocks. I don't think they'd be any different in a big block. Some LT-1 guys I know swear by them, and I've gotten good service out of multiple sets in my 480,000 mile 350 powered Caprice.

71Dragtruck · 10-04-2006, 09:24 AM

I run them in my BB.

409biscayne · 10-04-2006, 11:53 AM

I used to run AC , but there hard to find and exspensive so i switched to Autolite , but they don't seem to last very long , i'll try the NGK , i run them in just about everything else anyway . Looks like we get one more race day this Sunday , so a new set of plugs is in order . Supposed to be sunny and cool , last chance to run a 14.25 , lol.
Later ......................................... 409.

67ChevyRedneck · 10-04-2006, 11:55 AM

Quote:

Originally Posted by Werewolf

NGK's are .. ironically .. a good plug for Chev small blocks. I don't think they'd be any different in a big block. Some LT-1 guys I know swear by them, and I've gotten good service out of multiple sets in my 480,000 mile 350 powered Caprice.

I've been running them in my Z71 and 67. They are cheap as dirt and work great. A lot of the fellers over at Gm-trucks.com swear by them and Taylor wires. So far they've performed well in my trucks.

bryanw1968 · 10-04-2006, 11:58 AM

NGK is a great plug. AC and Autolite are also decent plugs. I think aside from picking a good brand, getting the correct heat range is as important.
My .02 cents....
B

bryanw1968 · 10-04-2006, 01:48 PM

Here is a good site on plugs.....

http://www.globaldenso.com/PLUG/basi...nge/index.html

Aarons72s · 10-04-2006, 02:04 PM

Me personally, ac delco exclusive. But autolites are pretty good. But what ever you do stay away from BASH ( exscuse me bosh). Me and mechanic friend where always asked what we thought of bosh and we always replied bash. They would ask us what do you mean by that. And we said that the only good thing bosh was good for was to throw them at a brick wall adn watch them bash! Sorry just had to get that out.
Aaron

409biscayne · 10-04-2006, 05:48 PM

O.K. all you plug experts , my owners manual says to use AC 43-N , i've been using Autolite 403 . I couldn't find any NGK instock in town , so i went over to the AC Delco distributor , he sold me R43XLS , said there a direct cross over cuz 43-N doesn't exist any longer . The R43XLS appear to be longer than the Autolite 403 , did i get the right plugs ? Sorry for rambling .
Comments anyone ?
Tks ....................................... 409

bryanw1968 · 10-04-2006, 06:03 PM

The longer the plug the cooler heat range of the plug. The AC Delco 43 sounds like the right plug. The 44 is common but if you have a little more umph in the motor it should be fine. I wouldn't go any hotter though unless you're going to be standing on all the time.

B-dub

Werewolf · 10-04-2006, 07:47 PM

You can probably get away with running a touch more timing with the 43. I think I got those in my Caprice, one of the few plugs I've put in that hasn't caused the car to ping... and it's been pinging for 250k miles despite the plug type. Too bad one of the 43's has been missing randomly at idle since I put them in. :P Best luck I had was an NGK plug that was one heat range colder than what the car called for. Electrodes stuck out a bit farther, but it didn't affect anything.

I wish they still made the AC Rapidfires. Those plugs were kickass when they first came out. Then they changed them, and they kind of sucked, and then they cancelled them.

Make sure that gap is right, too!

I heard from somebody that Bosch work well in Chryslers and some foreign cars, like Mercedes. I put a set in the Voyager, and yeah, they seem to be working well. Anything is better than the Champion platinums that were in it, though. As for GM's, Bosch does SUCK ASS in them.

Speaking of which, NEVER, NEVER, NEVER BUY CHAMPIONS. Apparently, forever ago, they were the best. All my dad would ever buy. But since I started changing plugs almost 20 years ago, they've always sucked.

409biscayne · 10-04-2006, 11:08 PM

What should the gap be ?? Stock point distributor w/ blaster coil .
Tks..................................... 409.

Werewolf · 10-05-2006, 07:58 AM

Most older V8's I've come across take a .035 gap. Then again, most took the R-45 plug. Should be listed with the plug type, wherever you found that.

409biscayne · 10-05-2006, 05:29 PM

Drag race only , 43's , 44's or 45's ??
I'm not good on decision's , lol.

71Dragtruck · 10-05-2006, 08:08 PM

Quote:

Originally Posted by 409biscayne

Drag race only , 43's , 44's or 45's ??
I'm not good on decision's , lol.

I'll try to get you the number of the A/C plugs in my 396 tonight. I think they are 45's.

**truckdude239** · 10-05-2006, 09:35 PM

i only run ac delco or ngk i ran a set of of motor craft the last time in my f-150 the autolites never ran good in any of my trucks thats when i started running ac delco even in my ford lol

QKENUF4U · 10-05-2006, 10:52 PM

NGK in EVERYTHING i own. need to do that this week to be exact since emissions is this month. gotta install my small cats to.

Werewolf · 10-06-2006, 09:15 AM

Advance Auto's website says R43XLS @ .035" gap. I still *highly* recommend the NGK V-power, plug number GR5, also @ .035" gap. It's also listed on the site, with a barrage of other plugs, of course.

409biscayne · 10-06-2006, 11:23 AM

Thanks everyone . I ended up installing the AC 43's @ .035 . I couldn't find the NGK's but i'll order some shortly . This sunday is the last race day here , winters coming . On monday we're diving into the spare 396 , it's a 67 Camaro 325 horse , 98cc closed chamber engine , don't know much more than that , hopefully it has some nice internals . That will be my engine for next year . I'm going to try and run Super street , high 12's / low 13's . That's about all i can afford with kids in college , lol.
Later ......................................... 409.

10-03-2006, 10:54 PM	#1
409biscayne Senior Member Join Date: Nov 2005 Location: Spokane , Wash. Posts: 790	Spark plugs Need to change plugs in the 68 , what brand / part nbr are y'all using ? It's a stock 396 . Thanks ........................................ 409 __________________ Can-Am Motorsports 37 Chev Coupe 331 4 speed 5.13 posi . ex-gasser . 64 Biscayne 409 2x4 4 speed 4.11 posi 65 Nova Wagon Drag Car 383 t400 (Dragin-Wagon) 68 c10 cst 396 t400 a/c buckets lwb 4.11 posi (SOLD)

10-03-2006, 11:10 PM	#2
dougs69c10 Registered User Join Date: Feb 2006 Location: Birmingham,Alabama Posts: 260	Re: Spark plugs just use stock ac delco copper plugs. I doubt they would use like a cr45ts but something along those linex __________________ 1969 c10 stepside 250 inline six, 4speed granny tranny, 4.11 posi rear end

10-04-2006, 08:18 AM	#4
Werewolf Woof? Join Date: Jun 2005 Location: Raleigh, NC Posts: 276	Re: Spark plugs NGK's are .. ironically .. a good plug for Chev small blocks. I don't think they'd be any different in a big block. Some LT-1 guys I know swear by them, and I've gotten good service out of multiple sets in my 480,000 mile 350 powered Caprice. __________________ 1968 LWB CST BB 2004 Avalanche Z71 LT3. 2003 S-10 ZR2 (hers). 1997 Astro 1992 Caprice wagon, 500k stock miles. Nursing wounds after a bad wreck. 1997 Saturn - need gas mileage from something!

10-04-2006, 09:24 AM	#5
71Dragtruck Registered User Join Date: Jun 2004 Location: Saskatchewan, Canada Posts: 1,368	Re: Spark plugs I run them in my BB. __________________ Speed is just a matter of money, question is how fast can you afford to go? 8.95@148.97mph all motor haven't tried bottle yet Sponsored by: Getz Oilfield Consulting Hard Candy Customs

10-04-2006, 11:53 AM	#6
409biscayne Senior Member Join Date: Nov 2005 Location: Spokane , Wash. Posts: 790	Re: Spark plugs I used to run AC , but there hard to find and exspensive so i switched to Autolite , but they don't seem to last very long , i'll try the NGK , i run them in just about everything else anyway . Looks like we get one more race day this Sunday , so a new set of plugs is in order . Supposed to be sunny and cool , last chance to run a 14.25 , lol. Later ......................................... 409. __________________ Can-Am Motorsports 37 Chev Coupe 331 4 speed 5.13 posi . ex-gasser . 64 Biscayne 409 2x4 4 speed 4.11 posi 65 Nova Wagon Drag Car 383 t400 (Dragin-Wagon) 68 c10 cst 396 t400 a/c buckets lwb 4.11 posi (SOLD)

10-04-2006, 11:58 AM	#8
bryanw1968 Senior Member Join Date: Jul 2006 Location: Leander, Texas Posts: 850	Re: Spark plugs NGK is a great plug. AC and Autolite are also decent plugs. I think aside from picking a good brand, getting the correct heat range is as important. My .02 cents.... B

10-04-2006, 01:48 PM	#9
bryanw1968 Senior Member Join Date: Jul 2006 Location: Leander, Texas Posts: 850	Re: Spark plugs Here is a good site on plugs..... http://www.globaldenso.com/PLUG/basi...nge/index.html

10-04-2006, 02:04 PM	#10
Aarons72s Registered User Join Date: Apr 2006 Location: oklahoma Posts: 10,670	Re: Spark plugs Me personally, ac delco exclusive. But autolites are pretty good. But what ever you do stay away from BASH ( exscuse me bosh). Me and mechanic friend where always asked what we thought of bosh and we always replied bash. They would ask us what do you mean by that. And we said that the only good thing bosh was good for was to throw them at a brick wall adn watch them bash! Sorry just had to get that out. Aaron

10-04-2006, 05:48 PM	#11
409biscayne Senior Member Join Date: Nov 2005 Location: Spokane , Wash. Posts: 790	Re: Spark plugs O.K. all you plug experts , my owners manual says to use AC 43-N , i've been using Autolite 403 . I couldn't find any NGK instock in town , so i went over to the AC Delco distributor , he sold me R43XLS , said there a direct cross over cuz 43-N doesn't exist any longer . The R43XLS appear to be longer than the Autolite 403 , did i get the right plugs ? Sorry for rambling . Comments anyone ? Tks ....................................... 409 __________________ Can-Am Motorsports 37 Chev Coupe 331 4 speed 5.13 posi . ex-gasser . 64 Biscayne 409 2x4 4 speed 4.11 posi 65 Nova Wagon Drag Car 383 t400 (Dragin-Wagon) 68 c10 cst 396 t400 a/c buckets lwb 4.11 posi (SOLD)

10-04-2006, 06:03 PM	#12
bryanw1968 Senior Member Join Date: Jul 2006 Location: Leander, Texas Posts: 850	Re: Spark plugs The longer the plug the cooler heat range of the plug. The AC Delco 43 sounds like the right plug. The 44 is common but if you have a little more umph in the motor it should be fine. I wouldn't go any hotter though unless you're going to be standing on all the time. B-dub

10-04-2006, 07:47 PM	#13
Werewolf Woof? Join Date: Jun 2005 Location: Raleigh, NC Posts: 276	Re: Spark plugs You can probably get away with running a touch more timing with the 43. I think I got those in my Caprice, one of the few plugs I've put in that hasn't caused the car to ping... and it's been pinging for 250k miles despite the plug type. Too bad one of the 43's has been missing randomly at idle since I put them in. :P Best luck I had was an NGK plug that was one heat range colder than what the car called for. Electrodes stuck out a bit farther, but it didn't affect anything. I wish they still made the AC Rapidfires. Those plugs were kickass when they first came out. Then they changed them, and they kind of sucked, and then they cancelled them. Make sure that gap is right, too! I heard from somebody that Bosch work well in Chryslers and some foreign cars, like Mercedes. I put a set in the Voyager, and yeah, they seem to be working well. Anything is better than the Champion platinums that were in it, though. As for GM's, Bosch does SUCK ASS in them. Speaking of which, NEVER, NEVER, NEVER BUY CHAMPIONS. Apparently, forever ago, they were the best. All my dad would ever buy. But since I started changing plugs almost 20 years ago, they've always sucked. __________________ 1968 LWB CST BB 2004 Avalanche Z71 LT3. 2003 S-10 ZR2 (hers). 1997 Astro 1992 Caprice wagon, 500k stock miles. Nursing wounds after a bad wreck. 1997 Saturn - need gas mileage from something!

10-04-2006, 11:08 PM	#14
409biscayne Senior Member Join Date: Nov 2005 Location: Spokane , Wash. Posts: 790	Re: Spark plugs What should the gap be ?? Stock point distributor w/ blaster coil . Tks..................................... 409. __________________ Can-Am Motorsports 37 Chev Coupe 331 4 speed 5.13 posi . ex-gasser . 64 Biscayne 409 2x4 4 speed 4.11 posi 65 Nova Wagon Drag Car 383 t400 (Dragin-Wagon) 68 c10 cst 396 t400 a/c buckets lwb 4.11 posi (SOLD)

10-05-2006, 07:58 AM	#15
Werewolf Woof? Join Date: Jun 2005 Location: Raleigh, NC Posts: 276	Re: Spark plugs Most older V8's I've come across take a .035 gap. Then again, most took the R-45 plug. Should be listed with the plug type, wherever you found that. __________________ 1968 LWB CST BB 2004 Avalanche Z71 LT3. 2003 S-10 ZR2 (hers). 1997 Astro 1992 Caprice wagon, 500k stock miles. Nursing wounds after a bad wreck. 1997 Saturn - need gas mileage from something!

10-05-2006, 05:29 PM	#16
409biscayne Senior Member Join Date: Nov 2005 Location: Spokane , Wash. Posts: 790	Re: Spark plugs Drag race only , 43's , 44's or 45's ?? I'm not good on decision's , lol. __________________ Can-Am Motorsports 37 Chev Coupe 331 4 speed 5.13 posi . ex-gasser . 64 Biscayne 409 2x4 4 speed 4.11 posi 65 Nova Wagon Drag Car 383 t400 (Dragin-Wagon) 68 c10 cst 396 t400 a/c buckets lwb 4.11 posi (SOLD)

10-05-2006, 09:35 PM	#18
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,233	Re: Spark plugs i only run ac delco or ngk i ran a set of of motor craft the last time in my f-150 the autolites never ran good in any of my trucks thats when i started running ac delco even in my ford lol __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube



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10-05-2006, 10:52 PM	#19
QKENUF4U Senior Member Join Date: Jan 2005 Location: SUNNY WARM BIKE RIDING COTTONWOOD ARIZONA Posts: 2,097	Re: Spark plugs NGK in EVERYTHING i own. need to do that this week to be exact since emissions is this month. gotta install my small cats to.

10-06-2006, 09:15 AM	#20
Werewolf Woof? Join Date: Jun 2005 Location: Raleigh, NC Posts: 276	Re: Spark plugs Advance Auto's website says R43XLS @ .035" gap. I still highly recommend the NGK V-power, plug number GR5, also @ .035" gap. It's also listed on the site, with a barrage of other plugs, of course. __________________ 1968 LWB CST BB 2004 Avalanche Z71 LT3. 2003 S-10 ZR2 (hers). 1997 Astro 1992 Caprice wagon, 500k stock miles. Nursing wounds after a bad wreck. 1997 Saturn - need gas mileage from something!

10-06-2006, 11:23 AM	#21
409biscayne Senior Member Join Date: Nov 2005 Location: Spokane , Wash. Posts: 790	Re: Spark plugs Thanks everyone . I ended up installing the AC 43's @ .035 . I couldn't find the NGK's but i'll order some shortly . This sunday is the last race day here , winters coming . On monday we're diving into the spare 396 , it's a 67 Camaro 325 horse , 98cc closed chamber engine , don't know much more than that , hopefully it has some nice internals . That will be my engine for next year . I'm going to try and run Super street , high 12's / low 13's . That's about all i can afford with kids in college , lol. Later ......................................... 409. __________________ Can-Am Motorsports 37 Chev Coupe 331 4 speed 5.13 posi . ex-gasser . 64 Biscayne 409 2x4 4 speed 4.11 posi 65 Nova Wagon Drag Car 383 t400 (Dragin-Wagon) 68 c10 cst 396 t400 a/c buckets lwb 4.11 posi (SOLD)

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