May 11, 2022, 09:12 PM
camaro77spark plugs
so I normally would run the NGK R5671A-7 in my old motor was just a conventional headed 13.1 comp BBC I recently bought a 584 with -20 heads and the motor has R5671A-9 in it which is a cold plug this is a 15.1 NA deal. what are guys running with similar set ups
May 11, 2022, 09:34 PM
moparacerWell you are running 7s at 13:1, I am running 8s at 14:1 and they have 9s in it at 15:1 so I am kind of thinking that is about right? Lots other factors aside of comp ratio though.
Better to be too cold than too hot to start.
May 11, 2022, 09:49 PM
"The Bender"Gas or alcohol?
272" Spitzer
540 Chevy
The Blower Shop XR1
FTI XPM Series Converter
FTI Level 6 Powerglide
3.69@199
.916 60'
2017 Bradenton Heads Up Madness
Open Outlaw Champ
2018 PDRA T/D #5
2019 PDRA T/D #2
2020 Retired From T/D Competition....
2020 Bradenton NMCA Hemi Shootout Winner
2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass.
May 11, 2022, 10:33 PM
rustyi ran 8 in my 598 on alky ,15/1
honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224
May 12, 2022, 07:26 AM
1320racer-9 with my 16:1 648 on gas
-9 with my 15.4:1 622 on gas
May 12, 2022, 08:49 AM
camaro77quote:
Originally posted by "The Bender":
Gas or alcohol?
gas
May 12, 2022, 08:56 AM
"The Bender"quote:
Originally posted by camaro77:
quote:
Originally posted by "The Bender":
Gas or alcohol?
gas
I vote for 9's also
272" Spitzer
540 Chevy
The Blower Shop XR1
FTI XPM Series Converter
FTI Level 6 Powerglide
3.69@199
.916 60'
2017 Bradenton Heads Up Madness
Open Outlaw Champ
2018 PDRA T/D #5
2019 PDRA T/D #2
2020 Retired From T/D Competition....
2020 Bradenton NMCA Hemi Shootout Winner
2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass.
May 12, 2022, 10:18 AM
NC3x58We have always run -9 in a 15:1 to 15.5:1 24* BBC, Gas or Alky. I suppose on gas we could've gotten away with -8, but they never gave us an issue so we left it.
Nick Craig
1971 Camaro Split Bumper
376ci LS3
May 12, 2022, 10:51 AM
TOP38quote:
Originally posted by "The Bender":
quote:
Originally posted by camaro77:
quote:
Originally posted by "The Bender":
Gas or alcohol?
gas
I vote for 9's also
Can I mail in my vote???????
May 12, 2022, 11:29 AM
Canted Valve^^^^^^
Illegitimi non carborundum
May 12, 2022, 11:54 AM
Mike Friziequote:
Originally posted by TOP38:
quote:
Originally posted by "The Bender":
quote:
Originally posted by camaro77:
quote:
Originally posted by "The Bender":
Gas or alcohol?
gas
I vote for 9's also
Can I mail in my vote???????
THEY MAY HAVE TO STOP TALLYING THEM OVER NIGHT AND WAIT FOR EXTRA'S TO SHOW UP.
Michael Frizie
ET 2471
May 12, 2022, 01:25 PM
"The Bender"And all this time we're all voting for NGK's, now after overnight and a Autolite won.......
272" Spitzer
540 Chevy
The Blower Shop XR1
FTI XPM Series Converter
FTI Level 6 Powerglide
3.69@199
.916 60'
2017 Bradenton Heads Up Madness
Open Outlaw Champ
2018 PDRA T/D #5
2019 PDRA T/D #2
2020 Retired From T/D Competition....
2020 Bradenton NMCA Hemi Shootout Winner
2021 getting back into bracket racing with a Gen3 Hemi powered 87 Cutlass.
May 12, 2022, 01:29 PM
T/D65912000 spark plugs.....
May 12, 2022, 05:32 PM
markemarkDoes or Has anyone used the Autolite AR3933 which is the equivalent to the NGK R5671A-9 ? Opinion?
May 12, 2022, 05:53 PM
1320racerJunk, used them years ago and Wouldn’t make 100 before developing a miss. Poor quality control. Sunset Racecraft and other engine builders experienced the same and stopped using them.
May 12, 2022, 07:17 PM
wideopen2319s in everything from injected alky at 12:1 to injected nitro at 14/8:1 including blown alky 540 ci @12.5:1. Very versatile. You can always start with one run and get baseline make swap for the weekend and see how motor likes it.
America home of free. Brought to you by 2nd amendment.
May 12, 2022, 08:23 PM
Matrix9s in my 582 20 degree engine
May 14, 2022, 10:24 AM
AlaskaracerRunning 9's in my 16.5:1 665" on alky. Have experienced some plug issues including misfires on NGK, but mostly trouble free. Use them primarily for tuning then switch to the Autolites. Autolites last longer and I've had zero issues with them. NGK are easier to read though....
Mark Goulette
Owner/Driver of the Livin' The Dream Racing dragster
www.livinthedreamracing.com"Speed kills but it's better than going slow!"
Authorized Amsoil Retailer
May 14, 2022, 11:53 AM
markemarkquote:
Originally posted by Coloradoracer:
Running 9's in my 16.5:1 665" on alky. Have experienced some plug issues including misfires on NGK, but mostly trouble free. Use them primarily for tuning then switch to the Autolites. Autolites last longer and I've had zero issues with them. NGK are easier to read though....
You're using Autolite AR3933 ? I don't read plugs, just replace. I read my DA and ET slip.
May 14, 2022, 11:56 AM
vetmanquote:
Originally posted by Coloradoracer:
Running 9's in my 16.5:1 665" on alky. Have experienced some plug issues including misfires on NGK, but mostly trouble free. Use them primarily for tuning then switch to the Autolites. Autolites last longer and I've had zero issues with them. NGK are easier to read though....
As on another thread always ohm check NGK plugs some are -open
The difference between ignorance and stupidity. Ignorance is lack of knowledge. Stupidity is the inability to learn. Don't be stupid