TwinTurbo.NET: Nissan 300ZX forum - Well, the best explanation I have is
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Subject Well, the best explanation I have is
     
Posted by Rule12b on February 22, 2006 at 5:01 PM
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In Reply To Good stuff man, congrats! posted by Shawn300zTT GT28R MD on February 22, 2006 at 01:02 AM
     
Message second hand from Richard at West Coast Racing Heads. Basically, he felt that since our motors are forced induction, that the possible power and flow gain by going up to 1 mm oversize from .5 mm, wasn't worth reducing the integrity of the head itself (i.e. winding up with a lot more valve area, then head to support them).

You should give him a call there, he can explain it far better than I can, but in the interest of longevity, I agreed with his take.

____________________________________________________
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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