Spark plug question

[NorthWestRider]

What you guys think look good or to lean?

 

[MrSony]

Teensy bit too lean, but I wouldn't worry about it if it's running fine.

 

[NorthWestRider]

Teensy bit too lean, but I wouldn't worry about it if it's running fine.

Seems to be running fine only thing i dont like bout it is dat when i put my foot into it i dont really feel the secondaries come on its a holley 750 vacuum secondary

 

[MrSony]

Does it have mechanical or vacuum secondaries?

 

[NorthWestRider]

Vacuum

 

[jeremyandthemonte]

I use ngk short plugs in my sbc and I used ac Delco in the 6.0 in our truck

 

[MrSony]

Does your engine pull enough vacuum? If you can, get a vacuum gauge hook it up and see. It should be between 17" and 21" if it's a mostly stock motor, even with that intake and holley. If that checks out, see if your secondaries are actually opening a full 90 degrees.

 

[NorthWestRider]

Will probably go get a vacuum gauge today n check that any special gauge that i meed?

 

[565bbchevy]

I have been running NGK's in anything performance wise for years, they have always been a good affordable plug plus they have a good selection of heat ranges which are easily identified by a number
Plus if your a running a CD ignition you don't need anything fancier than a V-power..

 

[MrSony]

Shouldnt. Just a standard vacuum gauge and plug it into a vacuum port. there are plenty of tutorials on the web.