spark plug heat range
11-29-2001, 03:39 PM
#1
Racer
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Join Date: Jun 2001
Location: Pocono Pines PA
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spark plug heat range
Curious as to Spark plug brands and heat ranges that are used by 951 Pilots out there.
Heat ranges of Stock/hotter/colder and why ?
Thank you very much
Heat ranges of Stock/hotter/colder and why ?
Thank you very much
11-29-2001, 03:52 PM
#2
Instructor
Join Date: Jun 2001
Location: Camas, WA
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Eugene-
I use good old copper plugs in my 951 race car (NGK ... I like their quality) and inspect / replace them frequently.
The NGK Tech Guy told me to run 1 to 2 plugs colder because of my mods. Currently running 1 plug range colder. I may try 2 plugs colder but don't really have a compelling reason too ... everything is working great.
MODS: MAF / Custom Chips / Group A turbo / Godzilla Blow Off / 20-21 lbs. peak boost / true seal rings / stock waste gate with LBE cranked! (~17 lbs.) / 110 octane race fuel ...
I know I'm gonna get crap about the max boost ... hey what can I say ... 4+ seasons now with stock head bolts too!!!! Go figure (knock on wood)
I use good old copper plugs in my 951 race car (NGK ... I like their quality) and inspect / replace them frequently.
The NGK Tech Guy told me to run 1 to 2 plugs colder because of my mods. Currently running 1 plug range colder. I may try 2 plugs colder but don't really have a compelling reason too ... everything is working great.
MODS: MAF / Custom Chips / Group A turbo / Godzilla Blow Off / 20-21 lbs. peak boost / true seal rings / stock waste gate with LBE cranked! (~17 lbs.) / 110 octane race fuel ...
I know I'm gonna get crap about the max boost ... hey what can I say ... 4+ seasons now with stock head bolts too!!!! Go figure (knock on wood)
12-01-2001, 05:52 AM
#3
Race Director
Hey man nothing wrong with that boost level. The problem is really with maintaining the proper air:fuel ratio (12.5:1 makes most power). Rodney Wiggins recently built a 400rwhp 951 using 25psi of boost and a completely stock bottom end. He's got stock pistons, so I guess it's still the same 8:1 compression.