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Author
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Topic: A-B-A testing spark plugs?
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Dave_C
Gearhead Posts: 994
From: Gadsden, Al
Registered: Aug 99
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posted 02-10-2005 10:54 AM
   
Hi all, Just wondering if anyone has done any A-B-A or dyno testing with different spark plug brands? I've been using Autolite AR Racing plugs. These have a back-cut ground strap that makes it almost like a side gap plug. Seems like a good idea to me. But....I have noticed that MANY racers use NGK. Has anyone done any direct testing? Alex, I know you have had to done some testing. This is for my 557 BBF, aluminum heads, Flying Toilet alky injection. Currently using Autolite AR 3932. Thanks
David Cole
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557 BBF Powered, alcohol injected rear engine dragster. 4.90 @ 143 1/8 mile. 1.09 60'. I've got to be crazy to drive this thing.
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SG236
Gearhead Posts: 416
From: Jasper, TN, USA
Registered: Dec 2000
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posted 02-10-2005 05:01 PM
David, I have used the AR plugs also. Friend of mine that races ProMod says to run the "Accel" plugs. Well I alwsys thought they were a cheap plug but I guess I'll give them a try. BTW I had the wrong converter in my car, I had PTC build be a new 8". Got it in just have to go to the track and test to see what happens.
Russ Hood
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Moneymaker
Administrator Posts: 26513
From: Lyons, IL, USA
Registered: May 99
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posted 02-10-2005 06:01 PM
We tested Champion, Motorcraft racing, Autolite AR, and Splitfire.
Similar heat ranges and several gaps.
MSD 7 with trick coil
Results as follows on MM's 289AR best with factory gap
Motorcraft BF 12 second with .035 gap
Splitfire 3rd
Champion lost 10 HP regardless of gap.
Missfire over 8300RPM. 2 sets tried. Anything over .040 gap cost or lost power on all brands. No 18mm NGK available Similar results on EFI 302 with same ignition Champion did not fall off as bad, but motor turned 2k less RPM.
After test, no need to bother with NGK as point was proven.
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Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
Dave_C
Gearhead Posts: 994
From: Gadsden, Al
Registered: Aug 99
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posted 02-10-2005 06:03 PM
quote:
Originally posted by SG236:
Friend of mine that races ProMod says to run the "Accel" plugs.I had PTC build be a new 8". Got it in just have to go to the track and test to see what happens.
Russ Hood
Thanks Russ, I have used the Accel shorty plugs before to gain header clearance with a set of cheap headers/Dart heads on my old Mustang. Never had a complaint with them. I have been told by a couple of guys that Accel plugs are made by NGK. So, go figure. You'll like the new converter. PTC will do a good job. I had my dragster recerted in Dec. I just freshened my engine, ordered new seat belts today. Tires prob next week. I'm trying to get it ready to make some NHRA license passes towards the end of this month at Hunstville. David Cole
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557 BBF Powered, alcohol injected rear engine dragster. 4.90 @ 143 1/8 mile. 1.09 60'. I've got to be crazy to drive this thing.
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Dave_C
Gearhead Posts: 994
From: Gadsden, Al
Registered: Aug 99
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posted 02-10-2005 06:06 PM
Thanks Alex,I've had good luck with Autolites, may just stay there and play with the heat ranges a bit.
David Cole [This message has been edited by Dave_C (edited 02-10-2005).]
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f100cleveland
Gearhead Posts: 328
From: St. James, MN
Registered: Sep 2004
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posted 02-10-2005 06:20 PM
Hey Alex, the Jacobs Pro-Street igntion system with ultra coil says that the gap should be 0.050" plus. I think I have mine at like 0.052". Do you think that is too much gap then by what you said? Would I be better to pull my gap a little tighter? Oh yeah, I'm running AR-25's. Thanks------------------
1982 Ford F100 2wd Shortbox. Powered by a 357 Cleveland w/ closed chamber 4v's and a Funnelweb. Full Roller c-6 trans with Gear Vendors Overdrive and 4.86 geared Detroit Locker equipped 9" rear. 1982 F100 351c 4v 1977 F150 460 Burnout Truck
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Moneymaker
Administrator Posts: 26513
From: Lyons, IL, USA
Registered: May 99
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posted 02-10-2005 06:34 PM
quote:
Originally posted by f100cleveland:
Hey Alex, the Jacobs Pro-Street igntion system with ultra coil says that the gap should be 0.050" plus. I think I have mine at like 0.052". Do you think that is too much gap then by what you said? Would I be better to pull my gap a little tighter? Oh yeah, I'm running AR-25's. Thanks
They are wrong.
Yes, you are too wide.
Return to .032-025 My sources?
Don Ward, racing product manager for Autolite Pesonal on track and dyno testing. ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
f100cleveland
Gearhead Posts: 328
From: St. James, MN
Registered: Sep 2004
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posted 02-10-2005 06:46 PM
quote:
Originally posted by Moneymaker:
Return to .032-025
Thanks Alex, I take it you mean 0.032-.035? So I actually lose power with the gap open too wide? Is it enough to notice, seat of the pants wise or like in idle quality? ------------------
1982 Ford F100 2wd Shortbox. Powered by a 357 Cleveland w/ closed chamber 4v's and a Funnelweb. Full Roller c-6 trans with Gear Vendors Overdrive and 4.86 geared Detroit Locker equipped 9" rear. 1982 F100 351c 4v 1977 F150 460 Burnout Truck
IP: Logged |
Moneymaker
Administrator Posts: 26513
From: Lyons, IL, USA
Registered: May 99
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posted 02-10-2005 07:08 PM
.032-.025 was and still is correct.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
f100cleveland
Gearhead Posts: 328
From: St. James, MN
Registered: Sep 2004
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posted 02-10-2005 07:12 PM
Wow, I'm not going against what you are saying, I will pull my plugs out and tighten the gap. That just is amazing that Jacobs wants the gap to be so much higher than what is 'optimal'. Why does the tighter gap work better? ------------------
1982 Ford F100 2wd Shortbox. Powered by a 357 Cleveland w/ closed chamber 4v's and a Funnelweb. Full Roller c-6 trans with Gear Vendors Overdrive and 4.86 geared Detroit Locker equipped 9" rear. 1982 F100 351c 4v 1977 F150 460 Burnout Truck
IP: Logged |
Moneymaker
Administrator Posts: 26513
From: Lyons, IL, USA
Registered: May 99
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posted 02-10-2005 07:18 PM
Maybe that's why they were bought out by Mr Gasket who is the parent company of two real ignition product companies.  ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First SS/MA in the TENS!
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
IP: Logged |
f100cleveland
Gearhead Posts: 328
From: St. James, MN
Registered: Sep 2004
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posted 02-10-2005 07:21 PM
Are you saying that the Jacobs isn't a good ignition system? ------------------
1982 Ford F100 2wd Shortbox. Powered by a 357 Cleveland w/ closed chamber 4v's and a Funnelweb. Full Roller c-6 trans with Gear Vendors Overdrive and 4.86 geared Detroit Locker equipped 9" rear. 1982 F100 351c 4v 1977 F150 460 Burnout Truck
IP: Logged |
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