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-   -   445 fe and spark plugs (http://www.clubcobra.com/forums/fe-talk/116890-445-fe-spark-plugs.html)

wrench87 08-21-2012 07:25 AM
445 fe and spark plugs
 
just looking for opinions what is the best spark plug to run in a 445fe street engine using the edelbrock heads, 10-1 comp ratio hydraulic roller cam 750 quick fuel carb?. currently running autolite 3924

blykins 08-21-2012 07:40 AM
That 3924 isn't bad and you can run it for awhile and see how it likes it.

wideglidejoe 08-22-2012 08:09 PM
I was running 3924's in my 455" FE and I was pleased with them. Seemed to be the right heat range and their appearance looked good once I got the correct jets in the carb.

I said "was" because it came apart on me. My next one will be a 462" FE, and I'll probably put 3924's in it.

RICK LAKE 08-23-2012 03:50 AM
What ignition setup is in the car?
 
wrench87 If you are running an MSD 6-al box and coil I open the gap of the spark plug between .008-.010" larger because of the greater spark from this system. If stock with an oil filled coil, stock numbers are fine. I also run this spark plug 3924 in Shelby heads., Rick L.

wrench87 08-23-2012 06:47 AM
I am running a 6al and a MSD high vibration coil, I was just running a .035 gap will i notice a difference if i increase the gap?. steve

601HP 08-23-2012 07:20 AM
Quote:
Originally Posted by blykins (Post 1206099)
That 3924 isn't bad and you can run it for awhile and see how it likes it.
Just curious.......what's your opinion of the AR3924 with the cut-back ground? Do you see any advantage to it?

Thanks,
David

blykins 08-23-2012 07:30 AM
Never tried a set back to back, so I have nothing to use as a baseline.

I mainly use Autolite plugs though, pick the correct heat range, gap accordingly, and run 'em.

ERA Chas 08-23-2012 07:42 AM
Quote:
Originally Posted by 601HP (Post 1206543)
Just curious.......what's your opinion of the AR3924 with the cut-back ground? Do you see any advantage to it?

Thanks,
David
I tried all the ProStock-style tricks-trimmed electrode and indexed plugs in the chamber. You won't notice a difference except possibly on a dyno or .005 on a time slip. It doesn't hurt anything but nothing you'll notice on the street.

Jerry Clayton 08-23-2012 08:42 AM
biggest issue with different types of ground straps is that they are on extented tip plugs------making sure that the piston doesn't hit them is vital ( indexing if necessary)

601HP 08-23-2012 01:21 PM
Quote:
Originally Posted by ERA Chas (Post 1206548)
I tried all the ProStock-style tricks-trimmed electrode and indexed plugs in the chamber. You won't notice a difference except possibly on a dyno or .005 on a time slip. It doesn't hurt anything but nothing you'll notice on the street.
And the wallet. I think the short ground jacks the price by 2X!:LOL:

Thanks for the input.

David


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