What plugs to use...

[5.7 hemi]

My dad has a 440 stroked to 505, aluminum heads, 10:1 compression, TTI headers, Fast EZ EFI 1.0, Summit racing CDI spark box (same as MSD), ac, and automatic. He needs to know what plugs he should use. I have no clue, so any help would be appreciated.

 

[440beep]

I've got the following plugs for my comparable 440 stroker:

NGK FR5 (hot medium heat range)
NGK BRK7E (cold heat range)

 

[Seax440Dodge]

depends on the head since it's an aftermarket aluminum head (stealths use smallblock plugs for example)

 

[Photon440]

I would recommend SPARK plugs. Pipe plugs give disappointing results.

But seriously, I'd contact the manufacturer of the heads and get their recommendations. They must have to deal with combos like this.

 

[5.7 hemi]

Pipe plugs...I knew someone was gonna say that cause I would have, lol!!

Stealth heads from 440 source are on the engine and they weren't much help on the phone, so that's why I'm asking here.

 

[Herr_Poopschitz]

Assuming Stealth = Edelbrock (safe assumption)

http://www.edelbrock.com/automotive_new/misc/tech_center/install/6000/60917.pdf

Page 2 recommends starting w/ a Champion RC-12YC or similar, and go from there. I like NGKs.

 

[bigmanjbmopar]

Pipe plugs...I knew someone was gonna say that cause I would have, lol!!

Stealth heads from 440 source are on the engine and they weren't much help on the phone, so that's why I'm asking here.

Champion, I am using these C63YC 5/8" #1,2 ARE A PITA on 1 I use a 5/8" socket with a bilt in nut on the back and then open end wrench. for the stealths use 5/8"

 

[bobtile]

Pipe plugs...I knew someone was gonna say that cause I would have, lol!!

Stealth heads from 440 source are on the engine and they weren't much help on the phone, so that's why I'm asking here.

440source sells the plugs they recommend for their heads.