Which spark plug for M&A aluminum head

TurboV6Sonoma

Im back!! Maybe for good
Joined
Jan 24, 2005
I need to know what spark plugs to run for my SII motor. The motor has an old set of M&A aluminum heads on it. I have a set of NGK 4554 plugs will they work?

Thanks
Ryan
 
Here is the info on the plugs I currently have. the NGK 4554
Manufacturer Heat Range 8
Electrode Core Material Copper
Electrode Tip Material Nickel alloy
Insulator Type Non-projected
Spark Plug Thread Size 14mm
Spark Plug Reach 0.750 in.
Spark Plug Seat Style Gasket
Wrench Diameter 5/8 in.
Ground Strap Quantity One
NGK Part Number R5671A-8

I know the thread, reach, and seat are correct. Does the heat range matter??
 
You will have to read the plugs to know if the heat range is right.Every engine is different the plugs that were in the heads i am doing had NGK TR5's in them.BTW great job on your truck.
 
You will have to read the plugs to know if the heat range is right.Every engine is different the plugs that were in the heads i am doing had NGK TR5's in them.BTW great job on your truck.


Thanks for your help and comments on the truck!
 
As Slamming says, every engine is different.

I'm running NGK 5238 - 9's gapped at 28 on my T/A aluminum headed 109, and they seem like they might be a little cold for the street. Car runs low tens currently.

I have some 5445 - 8s on the shelf and need to try them out. Maybe a tiny bit bigger gap, too. It's finally cooled down in Phoenix.

It's not a Stage 2 engine, so I'm not sure that this info applies in any way, but I figured I would put it out there.

Good luck!
 
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