AUGUST 2020 | ENGINEBUILDERmag.com 17
combinations need. e naturally aspirated,
the supercharger and the nitrous applications
are very close. We use a more robust casting for
the turbocharged heads than we do for the N/A
class because of the high cylinder pressures and
the horsepower that’s made.”
For racing applications, weight is always
an issue, so Williams says, “ ere’s no sense
running something that’s overkill for the job at
hand and carrying extra weight. It’s not needed.
Whether it’s LS or a Gen I SBC, or W9-RP
Mopars, which we do a lot of also, we have sets
of heads for many platforms and power adders.
And we’re also developing the new Toyota head
for the World of Outlaws sprint cars, which can
be used in a lot of drag race applications. I think
it’ll make tremendous inroads there.”
Williams says it’s a new engine and not based
on the NASCAR application that is the cantedFollow Us On Facebook1411 Ameron Dr.
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08EB_20Liberty50.qxp 7/24/20 4:10 PM Page 1Some engine builders prefer to buy bare cast heads so that they can do their
own port work. However, CNC ported heads from manufacturers such as AFR,
and others are a more signifi cant chunk of the market.
14-18 eb.aug20 Cylinder Heads.indd 17 8/7/20 9:44 AM
Naresh Jariwala