plug question

[Neelsonwheels]

I am running BR7EF plugs in my Typhoo and the truck sometimes has a slight miss under steady throttle. I have the gap set at .026 and was wondering if I should open them up a little? Say to .030. Any input would be appreciated.

 

[randy merritt]

Re: plug question

I am running BR7EF plugs in my Typhoo and the truck sometimes has a slight miss under steady throttle. I have the gap set at .026 and was wondering if I should open them up a little? Say to .030. Any input would be appreciated.

I battled a stutter at WOT in my truck for a long time using the same plugs. I switched to a heat range 6 plug and the stuttering has not been back. First, I switched to BR6EF plugs, then to TR6's, that I run now. My gap is about 26-28.

 

[Don W.]

Re: plug question

I am running BR7EF plugs in my Typhoo and the truck sometimes has a slight miss under steady throttle. I have the gap set at .026 and was wondering if I should open them up a little? Say to .030. Any input would be appreciated.

:2cents: That plug is not a projected nose plug. You might try some of those AND a wider gap. .030 would be good.:2cents:

 

[Neelsonwheels]

Re: plug question

Thanks Guys.
I am going to throw in a set of BR7EF's with a .030 gap and see what happens.
If that doesn't help I will go back to the TR6's that I used to run at .027.
I'll keep you posted on the outcome. I just hope I can keep the intake to throttle body
silicone hose from blowing off. I can't even get on boost without it popping. I have ordered
a new 4" to 3" transition hose and clamps. fingers crossed.

 

[Neelsonwheels]

Re: plug question

Well I regapped the plugs BR7EF to 0.030. Drove in to work.
The truck runs better. The miss isn't entirely gone but it is much better.

 

[Don W.]

Re: plug question

Good. IMHO I still think some projected nose plugs will help. How old are the wires? My current soapbox is that if your truck ain't running right new plug wires will fix it.:rotf::rotf:

 

[Neelsonwheels]

Re: plug question

Wires, ignition,distributor cap,rotor,module,are all new. I am with you Don.
I think the tune is a little fat on start up as I get soot and I have to work the throttle a little to get some air in at start. I have TR6's. I just wanted to try something with the BR7's.
Thanks.

 

[heavy breather]

Re: plug question

Just talked to ngk about this and have been looking into these plugs myself. What it boils down to is the plug will not self clean until 450°. Take out some fuel to warm the plugs at low load/rpm and add a couple degrees timing in those areas as well. That should be enough to make the plugs happy, under boost they'll take care of themselves

 

[Davemc1963]

Re: plug question

Aren't 7's a bit cold for normal use? I thought the 'standard' heat range equivalent to the AC44's was 5-6. Being a non projected nose will probably exagerate any driveability issues . High boost and racing, I think you are good, but possibly not pottering around on the street.

 

[heavy breather]

Re: plug question

6 heat range is recommended to @15 psi. I've run 5's 55's and 6's. I'm putting the br7's in tonight and going to tinker with the tune to see. Yes, the 7 is cold, but I think the safety of the electrode design is too beneficial not to give them a shot, especially when I only know one truck intentionally running less than 15psi.

 

[Neelsonwheels]

Re: plug question

Looks like i can't putter around town then. Balls to the walls all the time it is!! LOL

 

[randy merritt]

Re: plug question

Looks like i can't putter around town then. Balls to the walls all the time it is!! LOL

I had a pretty long talk with Gerber about plugs a while ago. The 7 heat range is probably safer for high boost, giving it hell. When I installed a new set of BR7EF's the truck would run good for a little while, but after a little while of just normal driving, my sputtering would come back at WOT. A hotter plug is better for puttering around and normal/sometimes give it the beans driving with a stock motor (5), but I settled on a compromise of 6 heat range. It seems to work good for me. I have no more stuttering under WOT after normal driving and then giving it the beans (20psi, meth and 22 degrees advance). I did not know about the self cleaning at 450, but that would explain a lot.

 

[atkonkler]

Re: plug question

I talked with an ngk guy and he talked to me about how alot of the plugs will self clean/burn off deposits. I thought that was pretty interesting....never knew that until he told me. Now when people bring in spark plugs and they are super crusty I look at the heat range and compare to the stock heat range. I help them get the correct heat range plug for their application and off they go.:tup:

 

[Damian]

Re: plug question

I have to say that this is one of the best spark plug threads that Ive read on this forum. Very nice guys!

 

[atkonkler]

Re: plug question

I have a set of ur5ix/7177 iridium that I'm going to put into my stock LB4 heads just to see what they can do over stock ur5. I'll keep you posted when I do it.:tup:

 

[Davemc1963]

Re: plug question

I looked into NGK racing plugs a while back and remember looking at the on line images. The NGK Racing Projected nose plug (NGK R5674-6 ) extends about half what a 'normal' projected nose plug does. I have no experience of how these would perform on our trucks though, but I do remember guys using them on bikes in the 70's and early 80's before I moved on to four wheel transport. If you google the part number, there is plenty of info out there on them. Possibly a good compromise?

 

[Neelsonwheels]

Re: plug question

Holly cow!!
Lots of good info in this post! I think I should go back to the TR6's.
I don't throttle the hell out of the truck to often. It does run better with the bigger gap but after normal driving I think I am fouling or gunking up the plugs. I will throw the TR6's in tonight and go out tomorrow and post results. Thanks again.

 

[syclone3]

Re: plug question

I still remember what Jim Stokes told me about spark plugs back in 93. From when he worked at PAS and later was doing engines from his house for Sy-Ty.

 

[Six-is-Enough]

Re: plug question

Cool.

How about sharing?

X2

 

[atkonkler]

Re: plug question

X3....:tup: