BIG BLOCK FORD
Would you like to react to this message? Create an account in a few clicks or log in to continue.

spark plug gap

+2
69F100
BBFmustang
6 posters

Go down

spark plug gap Empty spark plug gap

Post  BBFmustang August 5th 2010, 10:04 pm

i assume rule of thumb is 35 what is the gain of going to a bigger gap ? trying to learn a little tuning when using nos
BBFmustang
BBFmustang
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 169
Join date : 2009-08-10
Age : 58
Location : Fitzgerald,Ga

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  69F100 August 6th 2010, 10:48 pm

Jimmy you back in town for a while on the gap thing I don't know on the nos but I know when I put the msd 6al in mine I went to 45 and it seams to run cleaner not as rich when idling.

Jim
69F100
69F100
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 5386
Join date : 2009-01-04
Age : 57
Location : Irwinville Ga.

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  whatbumper August 7th 2010, 2:18 am

the more cylinder pressure the less gap you will need to run.

whatbumper

Posts : 3024
Join date : 2009-11-11
Age : 44

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  BBFmustang August 7th 2010, 6:39 am

[quote="69F100"]Jimmy you back in town for a while on the gap thing I don't know on the nos but I know when I put the msd 6al in mine I went to 45 and it seams to run cleaner not as rich when idling.

Jim had enough of the traveling going to mdi they seem to be the most stable around .all the o/t you can stand
BBFmustang
BBFmustang
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 169
Join date : 2009-08-10
Age : 58
Location : Fitzgerald,Ga

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  BBFmustang August 7th 2010, 6:49 am

whatbumper wrote:the more cylinder pressure the less gap you will need to run.
I am runnjng a 200 shot so stay with the 35 gap ?i have a msd system 6al , digital retard
BBFmustang
BBFmustang
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 169
Join date : 2009-08-10
Age : 58
Location : Fitzgerald,Ga

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  nuclearcobra August 7th 2010, 10:51 am

25 or 30 for a 200 shot imo
nuclearcobra
nuclearcobra
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 1385
Join date : 2009-08-16
Location : Delaware Coast

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  feetfirst August 7th 2010, 3:29 pm

Interesting topic........

6Al box.......0.035, popped and banged under load. Went to 0.030, then to 0.025, alot better but it still wouldn't rpm under load.

Finally went to a Digital 7 box, and now am back to 0.035...............and 6 tenths faster... Rolling Eyes

Its all about cylinder pressures, and the correct amount of spark needed.
feetfirst
feetfirst

Posts : 139
Join date : 2009-10-30
Location : Ontario, Canada

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  whatbumper August 7th 2010, 3:56 pm

the msd 6's are pretty weak ignitions. as cylinder pressure increase they can't "light the fire" so to say. We ran a 28 gap with a digital 7 with a 200 shot for years without issue. some people go wider but if it works well we didn't change it. It's time for you to step up ignitions. You will be glad. I will be selling my MSD 7530 at the end of the season. We are stepping up to the MSD 8.

whatbumper

Posts : 3024
Join date : 2009-11-11
Age : 44

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  Barney August 7th 2010, 5:12 pm

I run a .028 with a 110 squared and a mallory hyfire 7IIc box.
Barney
Barney

Posts : 2577
Join date : 2009-12-02
Age : 49
Location : Kirkland, Il

http://www.hdraracingseries.com

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  BBFmustang August 7th 2010, 7:45 pm

thanks guys ,Will experiment with smaller gap, I have had no problems out of my 6al but always needing to improve . Been looking at the digital 7
BBFmustang
BBFmustang
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 169
Join date : 2009-08-10
Age : 58
Location : Fitzgerald,Ga

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  whatbumper August 7th 2010, 9:50 pm

BBFmustang wrote:thanks guys ,Will experiment with smaller gap, I have had no problems out of my 6al but always needing to improve . Been looking at the digital 7
You just think you've had no problems with the 6. Wait until you put a 7 on it and see the difference. Very Happy

whatbumper

Posts : 3024
Join date : 2009-11-11
Age : 44

Back to top Go down

spark plug gap Empty Re: spark plug gap

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum