What spark plugs to use with m&a aluminum heads?

[evil666]

I bought a used set of M&A heads this year and would like to know what spark plugs you guys use with these heads? I plan on runnning over 20 lbs of boost, and would like to know how much you guys gap the plugs? On my old set up with stock heads I was using AC R42ts gapped at 32 at 25 lbs of boost and they worked great on that set up. Could I use the AC r42ts plugs with the M&A heads?

This is going to be my new set-up: T-Top 86 Grand Nationals 109 block with weisco forged pistons and 2 billet center main caps, M&A aluminum heads, roller rockers, port match lower intake ,te63 a.r .82, erson 214/214 cam, smc alky injection (95 % etanol), 25.5lbs boost, 94 octane, hooker cat back with dyno max ultra flow muffers, kenne bell headers, 60 lbs injectors, extender alky chip with 23/21 timing, with a gen 2 with a LS1 maf,thdp, mease 24 row IC, PTC 3200 stall 9 1/2 convertor, Ron Custom max boost brake module, MT drag radials (275/60/15) , rjc power plate, rjc boost controller, zeitronix wideband, HR motor mounts, Weld Drag Lites with skinnies up front, electric exhaust, hr rear sway bar, no front sway bar, 90/10 lakewood in the front and 50/50 lakewood shocks in the rear with energy suspension poly bushings all over, boxed rear lower control arms, Big mouth cold air with an AFE air filt

Thanks alot for your help, it will be greatly apreciated.
Marco.

T-Top 86 Grand National 62000 km)
stock long block, stock suspension, 12 inch red stripe convertor (2800stall), te44, smc alk injection (95 % etanol), 25.5lbs boost,( boost spike 28 psi in 1st gear), 94 octane, hooker cat back with dyno max ultra flow muffers, 42 ½ lbs 009 injectors, turbotweak alky chip with 23/21 timing, thdp, mease 24 row IC, Ron Custom max boost brake module, MT drag radials (275/50/15) 3720lbs race weight with driver. (Torque convertor locked only after car shifted in third), rjc power plate, rjc boost controller, zeitronix wideband, HR motor mounts, comp cam 980 valve springs. Weld Drag Lites with skinnies up front, electric exhaust cut-out.
BEST E/T
60FT=1.53
1/8= 7.25
1/4= 11.48
MPH=120.82
BEST 60FT=1.52

I have a gen 2 with an extender chip and LS1 maf, hr rear sway bar, no front sway bar, 90/10 lakewood in the front and 50/50 lakewood shocks in the rear with energy suspension poly bushings all over, boxed rear lower control arms. MT 275/60/15 drag radials. Big mouth cold air with an AFE air filter. The times above were done with out these parts.

 

[quickt]

I cant remember but i think those are 3/4 reach gasketed plug. Like used in TA head. NGK 5671A-7 8,9,10 or 5672-? for projected tip. Don W. will know he still uses them.

 

[fuzzyGN]

I would like to know also. Although, my engine will be N/A at about 13:1 compression.

 

[xrunner123]

I have the same setup as you. I used the Autolite 3923 which are 3/4" gasketed.
Make sure then length is correct for the AC r42ts

 

[Garycar]

I use Autolite 3923's. You can also use AC FR1LS or FR2LS. Don't know about 13:1 compression N/A motors. Better check to be sure you have sufficient clearance between piston top and plug.

 

[evil666]

My friend from whom I bought the heads from was using autolite 3934 racing. Should I use those plugs or the 3923? How much should I gap the plugs with these heads?

This is going to be my new set-up: T-Top 86 Grand Nationals 109 block with weisco forged pistons and 2 billet center main caps, M&A aluminum heads, roller rockers, port match lower intake ,te63 a.r .82, erson 214/214 cam, smc alky injection (95 % etanol), 25.5lbs boost, 94 octane, hooker cat back with dyno max ultra flow muffers, kenne bell headers, 60 lbs injectors, extender alky chip with 23/21 timing, with a gen 2 with a LS1 maf,thdp, mease 24 row IC, PTC 3200 stall 9 1/2 convertor, Ron Custom max boost brake module, MT drag radials (275/60/15) , rjc power plate, rjc boost controller, zeitronix wideband, HR motor mounts, Weld Drag Lites with skinnies up front, electric exhaust, hr rear sway bar, no front sway bar, 90/10 lakewood in the front and 50/50 lakewood shocks in the rear with energy suspension poly bushings all over, boxed rear lower control arms, Big mouth cold air with an AFE air filt

Thanks,
Marco.

T-Top 86 Grand National 62000 km)
stock long block, stock suspension, 12 inch red stripe convertor (2800stall), te44, smc alk injection (95 % etanol), 25.5lbs boost,( boost spike 28 psi in 1st gear), 94 octane, hooker cat back with dyno max ultra flow muffers, 42 ½ lbs 009 injectors, turbotweak alky chip with 23/21 timing, thdp, mease 24 row IC, Ron Custom max boost brake module, MT drag radials (275/50/15) 3720lbs race weight with driver. (Torque convertor locked only after car shifted in third), rjc power plate, rjc boost controller, zeitronix wideband, HR motor mounts, comp cam 980 valve springs. Weld Drag Lites with skinnies up front, electric exhaust cut-out.
BEST E/T
60FT=1.53
1/8= 7.25
1/4= 11.48
MPH=120.82
BEST 60FT=1.52

I have a gen 2 with an extender chip and LS1 maf, hr rear sway bar, no front sway bar, 90/10 lakewood in the front and 50/50 lakewood shocks in the rear with energy suspension poly bushings all over, boxed rear lower control arms. MT 275/60/15 drag radials. Big mouth cold air with an AFE air filter. The times above were done with out these parts.