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DRR Sportsman
posted
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
 
Posts: 405 | Location: Bellingham MA | Registered: October 21, 2004Reply With QuoteReport This Post
DRR Pro
posted Hide Post
Well 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.
 
Posts: 1558 | Location: PA | Registered: February 26, 2000Reply With QuoteReport This Post
DRR S/Pro
Picture of "The Bender"
posted Hide Post
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.
 
Posts: 3092 | Location: Yes | Registered: July 08, 2009Reply With QuoteReport This Post
DRR Pro
Picture of rusty
posted Hide Post
i ran 8 in my 598 on alky ,15/1


honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224

 
Posts: 1388 | Location: texas | Registered: February 17, 2006Reply With QuoteReport This Post
DRR Elite
posted Hide Post
-9 with my 16:1 648 on gas

-9 with my 15.4:1 622 on gas
 
Posts: 13522 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Sportsman
posted Hide Post
quote:
Originally posted by "The Bender":
Gas or alcohol?

gas
 
Posts: 405 | Location: Bellingham MA | Registered: October 21, 2004Reply With QuoteReport This Post
DRR S/Pro
Picture of "The Bender"
posted Hide Post
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.
 
Posts: 3092 | Location: Yes | Registered: July 08, 2009Reply With QuoteReport This Post



DRR Trophy
Picture of NC3x58
posted Hide Post
We 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
 
Posts: 410 | Location: Ohio | Registered: December 28, 2013Reply With QuoteReport This Post
DRR S/Pro
posted Hide Post
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???????

Laughing Hard
 
Posts: 2128 | Location: Tewksbury, MA,USA | Registered: November 03, 2000Reply With QuoteReport This Post
DRR S/Pro
posted Hide Post
^^^^^^ Laughing very hard


Illegitimi non carborundum
 
Posts: 2320 | Location: OKC, OK | Registered: February 15, 2008Reply With QuoteReport This Post
DRR Sportsman
Picture of Mike Frizie
posted Hide Post
quote:
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???????

Laughing Hard


THEY MAY HAVE TO STOP TALLYING THEM OVER NIGHT AND WAIT FOR EXTRA'S TO SHOW UP. NahNahTounge


Michael Frizie
ET 2471
 
Posts: 571 | Location: Winston, GA | Registered: April 10, 2002Reply With QuoteReport This Post
DRR S/Pro
Picture of "The Bender"
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And all this time we're all voting for NGK's, now after overnight and a Autolite won....... Super Angry


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.
 
Posts: 3092 | Location: Yes | Registered: July 08, 2009Reply With QuoteReport This Post
DRR Pro
Picture of T/D6591
posted Hide Post
2000 spark plugs.....


 
Posts: 1708 | Location: Portland,Oregon | Registered: January 18, 2009Reply With QuoteReport This Post
DRR Pro
posted Hide Post
Does or Has anyone used the Autolite AR3933 which is the equivalent to the NGK R5671A-9 ? Opinion?
 
Posts: 2392 | Location: 53056 | Registered: December 30, 2009Reply With QuoteReport This Post



DRR Elite
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Junk, 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.
 
Posts: 13522 | Location: NJ | Registered: August 20, 2000Reply With QuoteReport This Post
DRR Top Comp
Picture of wideopen231
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9s 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.
 
Posts: 4137 | Location: Greensboro NC | Registered: May 24, 2011Reply With QuoteReport This Post
DRR Sportsman
Picture of Matrix
posted Hide Post
9s in my 582 20 degree engine


Daryl Pinder

Dynasty Motorsports
www.dynastymotorsports.com


 
Posts: 456 | Location: Ft. Washington, MD USA | Registered: March 05, 2001Reply With QuoteReport This Post
DRR Pro
Picture of Alaskaracer
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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....


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
 
Posts: 1462 | Location: Back home in Alaska! | Registered: February 13, 2011Reply With QuoteReport This Post
DRR Pro
posted Hide Post
quote:
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.
 
Posts: 2392 | Location: 53056 | Registered: December 30, 2009Reply With QuoteReport This Post
DRR Trophy
posted Hide Post
quote:
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
 
Posts: 388 | Location: des moines iowa | Registered: January 10, 2020Reply With QuoteReport This Post
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