blower spark plug gap?

[purple barney]

i just put a 174 B&M roots blower on my brothers 302, do i need to tighten the plug gap like nitrous or just gap them standard?????

 

[Anonymous]

i would run a little cooler plug, and gap them .004 tighter. how much boost? i run an autolite 23 in my sbc, and i have to gap my plugs down to .018 or it blows out the spark above 5500 rpm.

 

[purple barney]

6psi yeah im running colder plugs just wasnt sure about the gap.

 

[Jackstand]

i would run a little cooler plug, and gap them .004 tighter. how much boost? i run an autolite 23 in my sbc, and i have to gap my plugs down to .018 or it blows out the spark above 5500 rpm.

18? whats the combo and the ignition setup?

 

[sheldonw]

i run a .022 gap 18-20psi

 

[Anonymous]

im cheap, so i run a hei stock coil and no box. no vaccuum advance and shortened mech advance slots. it works pretty good, but i know a good 6al and boost retard would help

 

[Sandmann]

What brand of plugs do you guys run? I 'm assuming like everything else in the auto parts world, not all plug brands are created equal.

 

[bowtie81]

Ive always had goodluck with ac delco

 

[Anonymous]

see thats how it works... i only run autolites, cause i cant even get it to hardly idle with ac delcos

 

[pdqwagon]

I run NGK plugs. all others would foul quickly. .025 gap at 13 psi, no blow out or any other issues.