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aimmotorsports
05-13-2008, 11:11 PM
what spark plug would you recomend for a 75-100 shot on a mustang 5.0?
85notch
05-14-2008, 12:44 AM
Stock
85notch
05-14-2008, 12:53 AM
standard I meant
streetlegal99gt
05-14-2008, 12:27 PM
What year is the engine and are they still stock heads? I would still suggest a projected tip but I would go one heat range colder and close the gap.

Any questions call me at work (ngk) at 248 926 6315

-Brandon
NGK tech support rep
The Man
05-14-2008, 01:39 PM
Got a NGK part number? I have a bone stock headed 5.0 too but am going to run a 150 shot.

I know I used TR6's in my Z28 before and loved them.
streetlegal99gt
05-14-2008, 02:46 PM
Got a NGK part number? I have a bone stock headed 5.0 too but am going to run a 150 shot.

I know I used TR6's in my Z28 before and loved them.


The stock plug should be a UR45 so I would suggest two heat ranges colder and a non projected tip for a 150 shot. plug number is BR6FS stock# 4323
jordanbmx
05-16-2008, 11:09 AM
on a stock bottom end 302 with gt-40 heads on spray we use ngk tr6's
aimmotorsports
05-16-2008, 07:27 PM
the block is a '89 ands the heads are from a '94 351 i was told.
igotaneed4speed
05-16-2008, 07:42 PM
on a stock bottom end 302 with gt-40 heads on spray we use ngk tr6's


Thats what I ran in my 351w on the bottle as well.. worked out pretty good..

10 to 1 closed chamber relativly small bore