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Author
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Topic: Plug reading
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Fastymz
Moderator Posts: 20708
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 07-08-2004 01:45 AM
   
I pulled 1 & 8 plug after a short blast. they both looked real dark with the first thread being black and 2nd being alot lighter and the 3rd looked unchanged.The does not smell rich at idle or other wise. ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics The older I get
The better I was
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Fstln69
Gearhead Posts: 560
From: Westmont,il
Registered: Jan 2003
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posted 07-08-2004 02:21 AM
quote:
Originally posted by Fastymz:
I pulled 1 & 8 plug after a short blast. they both looked real dark with the first thread being black and 2nd being alot lighter and the 3rd looked unchanged.The does not smell rich at idle or other wise.
Scoop make two hard blasts then pull plugs,it will take two to clean them up and get a good reading. ------------------
69 fairlane 351w [email protected] in search of Body parts for 69 fairlane
Import Racing is like the SPECIAL OLYMPICS!
Even if you win your still RETARDED!
66 brand x outlaw s/s
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JCQuinn@work
Gearhead Posts: 899
From: Lakewood, CO, USA
Registered: Jun 2001
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posted 07-08-2004 10:11 AM
When you read plugs you should be looking at the base of the center Porcelain. You are looking for a light tan color. You might need a viewer to see down there.The best place to do the reading is at the strip. put in some fresh plugs, run through the quarter, turn the engine off at wide open throttle as you go through the traps and coast over to the return road. Then pull the plugs and read them. If you can't get to a track, do your best to simulate these conditions. Reading plugs that have been driven around will not tell you what you want to know, you have to start with some new ones. John
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Fastymz
Moderator Posts: 20708
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 07-08-2004 12:31 PM
Thanks I guess I'll just have to wait to get it to the track. It starts and runs good for now.------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics The older I get
The better I was
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steve'66
Gearhead Posts: 9489
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 07-08-2004 01:02 PM
Is this with your new dp'r carb?SteveW
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Fastymz
Moderator Posts: 20708
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 07-08-2004 01:03 PM
No Steve the new 700 needs a rebuild. This is with my 600vs.------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics The older I get
The better I was
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steve'66
Gearhead Posts: 9489
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 07-08-2004 01:13 PM
OK,I wouldn't waste my time on the 600.  When you jet the 700, start with 2-3 numbers smaller jets than stock at your elevation. When we ran Fallon, most of the sealevel racers jetted down 3-4 sizes. SteveW
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Fastymz
Moderator Posts: 20708
From: Reno Nv USA M&M#1240
Registered: Apr 2001
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posted 07-08-2004 01:18 PM
Thanks Steve, that would put me at 64 fronts and 74 rears.Yeah wasn't worried about changing the 600 jets I was more trying to get a range for the jets in the 700, but what you said helped a lot. ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics The older I get
The better I was
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wildfire466
unregistered
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posted 07-09-2004 12:41 AM
I've posted info before, hope it helps?https://mustangsandmore.com/ubb/Forum12/HTML/007885.html Les ------------------
http://www.geocities.com/wildfire1mustang/
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CHIPSBAD67
Gearhead Posts: 396
From: LOU,KY;USA
Registered: Sep 2003
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posted 07-10-2004 10:57 PM
plug reading has'nt helped me one bit, ever. even had them read by an nmra renegade racer and guess what, everything he told me to do was wrong. "too much timing and you are fat"....wrong. did the timing first, the car slowed down. jetted next, car slowed down. maybe you just cant read this pump gas stuff unless the tune is way off. only thing i trust now is my timeslips or a dyno. maybe the guys running the airplane stuff actually get readable marks on the plugs. im done chasing that rabbit.------------------
306, 4speed, 4.11's....best 1/8 mile 7.58 at 92mph with 1.72 60ft. PUMP GAS/NO ADDERS/STREET TIRES
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