Sparkplug stroker

[Kennetto]

What sparkplug can you recomend for a 496 stroker 11-1 comp edelbrock heads only street driving,

 

[gkent]

Denso SK20R11

 

[RemCharger]

NGK R5671A-7

 

[Kennetto]

Denso SK20R11

I have problems with diesling when i stop engine ( itwont stop) i drive ngk R 567 i 8 maybe Denso will be better with the heat larger heat spann

 

[not so famous bob]

NGK R5671A-7

I started with ngk 7`s and ended up with ngk 5`s , non resister in my 505 ...

 

[71Beeper]

Dieseling problems are not from spark plugs.
Your engine idle is too high.
Either lower the engine idle or turn the engine off with the car in gear, that will stop dieseling issues.

 

[RemCharger]

Could try opening up the secondaries a hair

 

[Kennetto]

Dieseling problems are not from spark plugs.
Your engine idle is too high.
Either lower the engine idle or turn the engine off with the car in gear, that will stop dieseling issues.

Can heat range in the spark plug have any effect on engine knocking

 

[GTX JOHN]

Champion 300
or
Champion N10YC

Whichever you can find

Maybe N12YC if engine seldom goes over 5500/6000

 

[Kern Dog]

Dieseling problems are not from spark plugs.
Your engine idle is too high.
Either lower the engine idle or turn the engine off with the car in gear, that will stop dieseling issues.

Can heat range in the spark plug have any effect on engine knocking

I sure don't claim to know everything but switching to a colder plug may help.
It did for me when I was having this problem but I agree, too high an idle was the majority of the issue.

 

[beanhead]

At 11-1 I'd be starting with an NGK "6" heat range and testing from there.
After some run time you should be seeing the top 2-3 threads getting some color on them.
"5" heat range NGK plugs are perfect for my 10-1 TF-headed 505".
If you prefer another brand there are cross-reference charts on the web.
As stated though, dieseling can be tuning-related.

 

[Geoff 2]

NGK '5' heat range.

 

[Bee1971]

NGK BKR6E on my 10.5-1 383/432 Edelbrock E Street 75cc

 

[beanhead]

NGK BKR6E on my 10.5-1 383/432 Edelbrock E Street 75cc

View attachment 1700398

That plug looks good. Nice clean idle.
Initial timing mark is about halfway down the strap with the total mark a little closer to the shell, and you've got some good color on the first 3 threads...looking pretty good.
Have you cut the shells off to inspect the insulators all the way down?
That's the final step. If they're as clean as the tips, with a brown ring at the very bottom, I wouldn't change a damn thing..

 

[Bee1971]

Honestly , that is one thing I have never done , cut the shell to inspect

I should or need to put that on my to do list sometime

Thanx