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Old 12-08-2019, 04:53 PM   #10
SSDiv6
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Default Re: NHRA 2020 Rule Amendment SS Intakes???

Quote:
Originally Posted by BBF67 View Post
Everyone knows there are bogus cylinder heads out there in S/S. Looks like the Tech dept has finally found a way to rid the class of heads that have been drastically cut at a severe angle on the intake side. Those bogus heads usually used a spacer plate to make up for the difference from the OEM angle. In the 2020 racing season it will be very interesting to see who shows up to race and who does not.
Angle milling heads has been a machine shop operation since the 1960's. Nothing new.

There are even automotive machining charts that gives you the average amount of milling required on an intake manifold when you deck and square an engine block and when you mill cylinder heads for proper combustion chamber sizing.

By the way, when the runner volumes are measured, it is done without the spacer. An approach would be to weld the spacer to the intake or use a sheet metal intake. Nevertheless, after decades of allowing the use of intake spacers on intake manifolds and angle milled cylinder heads, they are suddenly illegal just months prior to the first race of 2020.
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