It is hard to see on the dyno graph posted above. I use a different scale on my dyno, 60-140 hp versus the 0-140 shown here. If you look closely at the 99 horsepower curve, right at 5200 rpm, there is a dip. That dip is when the VIX opens. As I said, on a different scale the dip is very noticable. If the dip is not there, you have a modified ECU.
I am firmly in the camp of the 1.6 not needing any special rules adjustment. They are 3-5 years behind on developement when compared to the 99-00 and a couple years behind the 01-05 cars. Out side of Todds car, a full blown 1.6 car has not been built in years. And that car is now 2 years old.
I am in favor of 99 suspension and allowing 1.6 cars to update to NA1.8 engines. Then leave plates and weights alone.
Dave
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Dave Wheeler
Advanced Autosports, the nations most complete Spec Miata shop
Author, Spec Miata Constructors Guide, version 1 and 2.0
Building Championship winning cars since 1995
4 time Central Division Spec Miata Champion car builder 2012-2013-2014-2017
Back to Back June Sprints Spec Miata 1-2 finishes 2016 and 2017
5 time June Sprints winner in Mazda's
6 Time Northern Conference Champion Car Builder
2014 SCCA Majors National point Champion car builder
2014 SCCA Runoffs winner, T4 (Bender)
2014 Central Division Champion, ITS (Wheeler)
2013 Thunderhill 25 hour winning crew chief
2007 June Sprints winner, (GT1, Mohrhauser)
Over 200 race wins and counting.
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