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Re: NGK Plugs ? [Re: Thumperdart] #944419
03/08/11 08:49 PM 03/08/11 08:49 PM
Joined: Jul 2004
Posts: 4,732
Watertown, WI
MikeyT Offline
master
MikeyT  Offline
master

Joined: Jul 2004
Posts: 4,732
Watertown, WI
Just to reiterate. I wasn't thinking that I was going to find some "magic bullet" in new plugs. I just wanted to know what plugs people would suggest and what heat range.

Again if people have suggestions or a way to make an educated guess. I would be interested.

Mike

1969 Dodge Dart Swinger
Re: NGK Plugs ? [Re: 602heavy] #944420
03/08/11 08:50 PM 03/08/11 08:50 PM
Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
D
dusturbd340W5 Offline
master
dusturbd340W5  Offline
master
D

Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
Quote:

Quote:

I found for a fact they idle better in my motor than the NGK so that works for me.



I'm hearing a few say this.................most guys won't waste money changing plugs out unless the plug is past it's sell-by date or the engine is running intermitant , the logic here is the gap between ground strap & electrode has grown (worn) , this can cause slight misfires due to the increased voltage necessary to jump the gap , will also reduce the time period of spark , guys happy cos he fits a new set of plugs wherby the gap is correct & the misfire disappears , if these plugs happen to be a different brand the guy gets sold on em .....................just another angle on things , not bashing anyone.



can't comment on anyone else but if you read one of the other post I made I clearly stated that this was 2 brand new sets of plugs I tried this with.
Both sets gap the same by me and I have indexed every plug I have installed in this motor from day 1 so that takes just about every variable out of the mix.
I,m out when you have multiple people like Jeff telling you what he has seen on the dyno and you still don't believe then I would say go climb back under the rock.

70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake

best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4
Re: NGK Plugs ? [Re: BradH] #944421
03/08/11 09:50 PM 03/08/11 09:50 PM
Joined: Jan 2003
Posts: 1,894
N of Detroit
DaveDudek Offline
top fuel
DaveDudek  Offline
top fuel

Joined: Jan 2003
Posts: 1,894
N of Detroit
Personally i`ve dyno`ed several different types of plugs. Look in my trailer, garage, and in my car. AUTOLITES

I forgot the exact number I picked up, but after I dyno`ed a second engine and got the same results, I never looked back....

Dave Dudek
1st Factory Stock legal car in the 10`s!!! [/b]
FAST & Factory Stock Rules: www.fastraces.org


FAST 69 Hemi RR 9.98@139
Re: NGK Plugs ? [Re: dusturbd340W5] #944422
03/08/11 10:03 PM 03/08/11 10:03 PM
Joined: Dec 2008
Posts: 1,200
UK
6
602heavy Offline
pro stock
602heavy  Offline
pro stock
6

Joined: Dec 2008
Posts: 1,200
UK
Quote:


then I would say go climb back under the rock.



You're the 2nd one to say that , just gotta go find that rock.

Looks like i'm goin with the flow & gonna start using autolites , guess the BS does'nt wash on here , interesting thread.
Re: NGK Plugs ? [Re: 602heavy] #944423
03/08/11 10:15 PM 03/08/11 10:15 PM
Joined: Jan 2003
Posts: 25,933
United Socialist States of Ame...
T
tboomer Offline
Too Many Posts
tboomer  Offline
Too Many Posts
T

Joined: Jan 2003
Posts: 25,933
United Socialist States of Ame...
Guys..How much does it cost to chsnge plugs? If you can pick it up a bit for not much money spent,isn't worth it? Jeff comes on here and gives some tech...And a lot of people cry B.S!!! How many of you guys gave seen his work? I think don't knock it till tou try it...

Need your rear end checked out? Contact Grizzly!!
Re: NGK Plugs ? [Re: 602heavy] #944424
03/08/11 10:33 PM 03/08/11 10:33 PM
Joined: Nov 2009
Posts: 2,177
ill
D
dennismopar73 Offline
top fuel
dennismopar73  Offline
top fuel
D

Joined: Nov 2009
Posts: 2,177
ill
just so everyone knows , i have run autolites, alot!!
i have run ngk alot!! on gas as well as alcohol having said that,
1 plug will not outperform the other , ,
in my case and in the cars i have run.
as for the o p in this ,
if he is running pump gas 89-92 oct- 8-9 range plug (med )
of any varity will work just fine in street application/ strip
good coil, cap/rotor, wires are a wise investment !
the right size carb, adjusted correctly, properly tuned ,
and timed will leed to alot of enjoyment at the track and on the road,

Re: NGK Plugs ? [Re: dennismopar73] #944425
03/10/11 06:29 PM 03/10/11 06:29 PM
Joined: Mar 2006
Posts: 294
tn
r69cuda Offline
enthusiast
r69cuda  Offline
enthusiast

Joined: Mar 2006
Posts: 294
tn
I had my stock eliminator 69 340 on the dyno all day yesterday. So, after lots of pulls playing with timing and jets, we got it to the most hp and tq it would produce. Took out the used Accel 113 plugs and put in a new set of Autolite Ar plugs. No change what so ever. FWIW. Mark

Re: NGK Plugs ? [Re: r69cuda] #944426
03/10/11 07:17 PM 03/10/11 07:17 PM
Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
M
MRMOPAR622 Offline
top fuel
MRMOPAR622  Offline
top fuel
M

Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
I have a question that I hope maybe some of you can help me with. On a Wedge engine with 572-13 heads a true 15.2-1 CR using the Champion C59CX plug is there any need to index the plugs? I have been told it is a waste of time,but I will do it if it helps. In the past I have never seen in results one way or the other at the track. Also what number Autolite plug would I need to use? I run alcohol if that matters. Indy says use Champion but I will try a set of Autolites.

PS Great post, I am always eager to learn more Speed Secrets!!!!

Last edited by MRMOPAR570; 03/10/11 07:39 PM.
"To Be The Man'You Have Got To Beat The Man" "T/D and Pro-Bracket Racer"
Re: NGK Plugs ? [Re: r69cuda] #944427
03/10/11 07:23 PM 03/10/11 07:23 PM
Joined: Oct 2004
Posts: 1,752
detroit area
M
moderncylinder Offline
top fuel
moderncylinder  Offline
top fuel
M

Joined: Oct 2004
Posts: 1,752
detroit area
in the small block you used an ar52? or an ar53? sometimes it works for some,, who knows,, its been better than ngk for me,, id have used an ar53 gapped at .045, did you open the gap up from out of the package? did you try different plug gaps?


for an indy 572 head you would use an ar3910 with 15/1 ive never seen anything in idexing aslong as the ground strap doesnt hit the piston
Re: NGK Plugs ? [Re: moderncylinder] #944428
03/10/11 07:31 PM 03/10/11 07:31 PM
Joined: Mar 2006
Posts: 294
tn
r69cuda Offline
enthusiast
r69cuda  Offline
enthusiast

Joined: Mar 2006
Posts: 294
tn
Hey Jeff, We did .020, .035, .045 no change on the accels or the ar52's. Mark
Re: NGK Plugs ? [Re: r69cuda] #944429
03/10/11 07:52 PM 03/10/11 07:52 PM
Joined: Oct 2004
Posts: 1,752
detroit area
M
moderncylinder Offline
top fuel
moderncylinder  Offline
top fuel
M

Joined: Oct 2004
Posts: 1,752
detroit area
you looked at average power? not just peaks?

not telling people this is the way to do it,, but when i dyno something say from 6300-9100,, my hemi stuff i average from 6500-7500 7000-8000 7500-8500 and 8000-9000 then look at those 4 numbers to compare pulls,, i can throw out the bottom number now,, but still start at 6300,, though convertors are above 7000
Re: NGK Plugs ? [Re: moderncylinder] #944430
03/10/11 08:03 PM 03/10/11 08:03 PM
Joined: Mar 2006
Posts: 294
tn
r69cuda Offline
enthusiast
r69cuda  Offline
enthusiast

Joined: Mar 2006
Posts: 294
tn
Yes, averages from 4500-6500.
Re: NGK Plugs ? [Re: r69cuda] #944431
03/25/11 11:02 PM 03/25/11 11:02 PM
Joined: Jan 2004
Posts: 3,838
Central Missouri Fort Leonard...
mopar65 Offline
master
mopar65  Offline
master

Joined: Jan 2004
Posts: 3,838
Central Missouri Fort Leonard...
I found a cross refrence chart that some body might be interested in for comparing the autolites to the ngk etc. i thought it m ight help some one. Mopar65

6549917-701.jpg (1054 downloads)
3520 pound race ready 1973 Street/Strip Dodge Dart - Stock stroke 440/727 10.49 @ 125.0 on 93 pump gas & ET Street Radials. More to come... ( SGT Miller) Proudly served 12 years in the US ARMY RESERVES support our troops
Re: NGK Plugs ? [Re: mopar65] #944432
03/25/11 11:03 PM 03/25/11 11:03 PM
Joined: Jan 2004
Posts: 3,838
Central Missouri Fort Leonard...
mopar65 Offline
master
mopar65  Offline
master

Joined: Jan 2004
Posts: 3,838
Central Missouri Fort Leonard...
and here is the heat range chart. mopar65

6549920-700.jpg (1421 downloads)
Last edited by mopar65; 03/25/11 11:03 PM.
3520 pound race ready 1973 Street/Strip Dodge Dart - Stock stroke 440/727 10.49 @ 125.0 on 93 pump gas & ET Street Radials. More to come... ( SGT Miller) Proudly served 12 years in the US ARMY RESERVES support our troops
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