TwinTurbo.NET: Nissan 300ZX forum - West Coast uses
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Subject West Coast uses
     
Posted by Rule12b on February 21, 2006 at 7:07 PM
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In Reply To nice!... posted by Zeus on February 21, 2006 at 06:53 PM
     
Message SI valves. They are less expensive than Fererra, but quality-wise, they believe them to be just as good if not in some cases, better. They are made of 21-4 stainless steel.

Besides being .5 mm larger than stock (they didn't feel going full 1mm oversize was a good call since you wind up with a lot more valve than head) the valve stems are smaller in diameter so you wind up with still better flow characteristics.

That exhausts my technical skills in this regard. . .:-)

____________________________________________________
1991 Aztec Red TT bought new in '91
Way back then, added JWT chip, ignition advance, Pop charger, Stainless 3pc Borla cat back; 17 in. OZ wheels
Sold 1994, 88,000 miles later, still on orig clutch; what a car

1991 Charcoal Gray TT purchased 06/05 and a heck of a lot more bang than my original.

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