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07-11-2006, 08:27 PM
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#1 |
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Registered User
Join Date: Jul 2006
Location: Fresno, Ca
Posts: 154
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Spark Plug # and gap
I have a 68 327 that I've converted to HEI. The engine is stock but I have the bolt ons Edelbrock performer Intake, 600cfm carb, and headers. She runs great but when I pulled the plugs after I drove her home last week she still had a stock plug with .35 gap. What plugs should be ran and what are the part numbers. Just want her to run nice not trying to be the speed demon. The posi 12 bolt helps me on that.......
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07-11-2006, 10:50 PM
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#2 |
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Registered User
Join Date: Jul 2006
Location: Tucson Az
Posts: 1,695
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Re: Spark Plug # and gap
Just use stock plugs but gap them at .045
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07-11-2006, 10:59 PM
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#3 |
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what happened to flint mi
Join Date: Oct 2005
Location: san diego
Posts: 436
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Re: Spark Plug # and gap
there is a heavy duty truck plug i believe the part number is 1025 or 1042 they are blue in color and work amazing i can get the exact number tommorrow if you want .....tom
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71 swb 2wd fleet frame off in progress 72 4x4 blazer daily driver 70 olds cutlass s mint condition owned by a grandma 56 gmc 2wd project waitng 97 fiance mobile |
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07-12-2006, 12:57 AM
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#4 |
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Senior Member
 
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,505
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Re: Spark Plug # and gap
I'm running Champion 4025 Truck Plugs @ .050 in the 350 in my '71 Jimmy.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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07-12-2006, 02:39 AM
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#5 |
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Registered User
Join Date: Jul 2006
Location: Fresno, Ca
Posts: 154
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Re: Spark Plug # and gap
Thanks everyone for your input. What ever parts numbers you can provide would be great. Truck Plugs? Are there different spark plugs for trucks, didn't realize that if thats the case. If so whats the dfference?
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07-12-2006, 02:40 AM
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#6 |
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Registered User
Join Date: Jul 2006
Location: Fresno, Ca
Posts: 154
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Re: Spark Plug # and gap
Tom that number on the plugs would be great....
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07-13-2006, 01:30 AM
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#7 |
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Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,505
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Re: Spark Plug # and gap
I used to run Champions for maybe 25 years, but since they went to Mexico their quality has gone south too. The Truck Plugs were a heavy duty plug that had a 3 year warranty - regardless of mileage. I put my last set of US-made Champs on the 350 in May, today a mechanic had to replace my #8 plug (from that batch) with an AC R46TS to pass emissions.
Had to go to ACs on my fresh L6 292 also last year, the Champs wouldn't cut it.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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07-15-2006, 09:42 AM
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#8 |
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what happened to flint mi
Join Date: Oct 2005
Location: san diego
Posts: 436
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Re: Spark Plug # and gap
4025 those are the plugs
__________________
71 swb 2wd fleet frame off in progress 72 4x4 blazer daily driver 70 olds cutlass s mint condition owned by a grandma 56 gmc 2wd project waitng 97 fiance mobile |
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07-15-2006, 10:44 AM
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#9 |
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Senior Member
Join Date: Feb 2006
Location: oregon city
Posts: 335
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Re: Spark Plug # and gap
1 word........3 letters
NGK
__________________
If it aint broke..............fix it till it is. www.fast77.com 1972 - 330 hp crate, 11" lift with 39x18 mickeys. 3/4 ton, cross steer, 4 wheel disc brakes 1996 Z71 w/ 35's |
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07-15-2006, 11:15 PM
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#10 |
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Account Suspended
Join Date: Nov 2004
Location: Deer Park, Tx.
Posts: 2,522
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Re: Spark Plug # and gap
So what gap does the general population here go with. Everyone answered between .035 - .050
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07-16-2006, 12:12 AM
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#11 |
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Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,448
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Re: Spark Plug # and gap
Most sources I've seen say 0.045 for HEI
__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal.  We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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07-16-2006, 12:20 AM
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#12 |
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Account Suspended
Join Date: Nov 2004
Location: Deer Park, Tx.
Posts: 2,522
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Re: Spark Plug # and gap
Thanx Krue.
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