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

nplocoman · 02-15-2010, 07:59 PM

I am changing a 69 with a 307 standard distributor to an hei. what number of plugs are you using? Or maybe a year range and I am guessing a 350 plug. What works best? Heck should I just widen the gape on the ones I have and run them?

JimKshortstep4x4 · 02-15-2010, 08:34 PM

I run my plugs at .045 when used with HEI ignition but .035 works also!

Jim

Sinister · 02-15-2010, 08:34 PM

You can run whatever plugs you normally run. Just gap them to .040-.045

nplocoman · 02-15-2010, 09:50 PM

Great! thanks! Finnaly somthing I don't haft to buy new!

**Stocker** · 02-15-2010, 10:01 PM

Quote:

Originally Posted by nplocoman

I am changing a 69 with a 307 standard distributor to an hei. what number of plugs are you using?

Eight

69heavychevy · 02-16-2010, 01:29 AM

i run ngk's gapped at .045

67ss&99ss · 02-16-2010, 01:36 AM

Quote:

Originally Posted by 69heavychevy

i run ngk's gapped at .045

agreed. I have tried AC, Champion, Autolite and NGK. I have had the best results with NGK. Now I run them in everything.

ole red · 02-16-2010, 12:08 PM

I still run the AC and gap them at 45

keenan · 02-20-2010, 05:37 PM

AC delcos are industry standard for gm engines.
champions are for chryslers.
bosch for ford.

gonzo6869 · 02-20-2010, 06:51 PM

I agree with all of the above, I have HEI AC Delco gapped at .045

evilways · 02-20-2010, 07:17 PM

Don’t some spark plugs have a ‘T’ at the end of the part number for using larger gaps?

neba · 02-20-2010, 07:28 PM

andy, you say you have the best results with NGK. what does that mean? runs better, gas mileage ??? i have heard if you run 44TS you would use 44TSX with an HEI dist. AC DELCO is designed for GM, that is what i use.

CB24 · 02-20-2010, 07:34 PM

Has anyone run the e3 plugs? Just curious if they're a gimmick or they actually perform well.

hchad18 · 02-20-2010, 07:54 PM

Quote:

Originally Posted by CB24

Has anyone run the e3 plugs? Just curious if they're a gimmick or they actually perform well.

Wish I could remember where I seen it but I've heard they actually out perform post plugs on the market, and they are the real deal. I think I might have seen a test on horsepower TV.

http://powerblocktv.com/blog/?p=146

nplocoman · 02-20-2010, 08:49 PM

Quote:

Originally Posted by Stocker

Eight

So My new 7 hole distrubuter won't work. I have been ebayed again!

69heavychevy · 02-21-2010, 01:54 AM

Quote:

Originally Posted by keenan

AC delcos are industry standard for gm engines.
champions are for chryslers.
bosch for ford.

actually motorcraft would be for fords, and bosch for german cars

Trip59 · 02-21-2010, 02:28 AM

Quote:

Originally Posted by nplocoman

So My new 7 hole distrubuter won't work. I have been ebayed again!

Give it to a ford guy... tell them it's the newest fuel efficiency design and double the price.

I don't want to hijack, but I had a question that dovetailed with the original question. I was handed an HEI that came out of a 73 with a 307... yeah, not original... BUT my question is, the PO had installed anti-fouls How do those play in with gapping an HEI fired plugfor a 307?

Trip

02-15-2010, 07:59 PM	#1
nplocoman never finish start another Join Date: Mar 2007 Location: North Platte Nebraska Posts: 432	Spark plugs I am changing a 69 with a 307 standard distributor to an hei. what number of plugs are you using? Or maybe a year range and I am guessing a 350 plug. What works best? Heck should I just widen the gape on the ones I have and run them?

02-15-2010, 08:34 PM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: Spark plugs I run my plugs at .045 when used with HEI ignition but .035 works also! Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC

02-15-2010, 08:34 PM	#3
Sinister Between Trucks... Join Date: Mar 2002 Location: Los Angeles, CA. Posts: 3,830	Re: Spark plugs You can run whatever plugs you normally run. Just gap them to .040-.045 __________________ Beat it to fit, Paint it to match...

02-15-2010, 09:50 PM	#4
nplocoman never finish start another Join Date: Mar 2007 Location: North Platte Nebraska Posts: 432	Re: Spark plugs Great! thanks! Finnaly somthing I don't haft to buy new!

02-16-2010, 01:29 AM	#6
69heavychevy Registered User Join Date: Jan 2007 Location: Garland,TX Posts: 431	Re: Spark plugs i run ngk's gapped at .045

02-16-2010, 12:08 PM	#8
ole red Registered User Join Date: Sep 2000 Location: C-WY Posts: 236	Re: Spark plugs I still run the AC and gap them at 45 __________________ 69 stepside, 1/2ton, 4X4, 350/350/205

02-20-2010, 05:37 PM	#9
keenan Registered User Join Date: Jul 2009 Location: hebron, ohio Posts: 91	Re: Spark plugs AC delcos are industry standard for gm engines. champions are for chryslers. bosch for ford.

02-20-2010, 06:51 PM	#10
gonzo6869 Cops, ha, catch me if you can! Join Date: Jun 2009 Location: Santa Barbara, CA. Posts: 271	Re: Spark plugs I agree with all of the above, I have HEI AC Delco gapped at .045 __________________ 72 C-10 Stepper 350/TH350 3.73 in the back Edelbrock intake and Carb Hooker Comp Headers 275/60R15 on Rallies

02-20-2010, 07:17 PM	#11
evilways Registered User Join Date: Mar 2008 Location: Lafayette, IN Posts: 226	Re: Spark plugs Don’t some spark plugs have a ‘T’ at the end of the part number for using larger gaps? __________________ Mark 1967 C/10 stepside lwb daily driver 1968 C/10 fleetside lwb parts truck 1971 Cheyenne Super swb project

02-20-2010, 07:28 PM	#12
neba Registered User Join Date: Feb 2010 Location: duluth mn Posts: 108	Re: Spark plugs andy, you say you have the best results with NGK. what does that mean? runs better, gas mileage ??? i have heard if you run 44TS you would use 44TSX with an HEI dist. AC DELCO is designed for GM, that is what i use.

02-20-2010, 07:34 PM	#13
CB24 Registered User Join Date: Jul 2009 Location: Surprise, AZ Posts: 138	Re: Spark plugs Has anyone run the e3 plugs? Just curious if they're a gimmick or they actually perform well.

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