[DeTomaso] 403C on the Dyno

Charles Engles cengles at cox.net
Thu Mar 1 15:31:57 EST 2012


Dear Dan,


               Excellent work as usual.  How are the funds holding up to
continue the Great Cleveland Dyno Project?  Would you be in need of more
donations to continue the only known objective comparative engine testing
project for the Cleveland engine?    Where should donations be sent?


                      Warmest regards,  Chuck Engles



-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Daniel C Jones
Sent: Thursday, March 01, 2012 2:22 PM
To: Pantera REALBIG forum
Subject: Re: [DeTomaso] 403C on the Dyno

Last night Dave tested the Scott Cook dual plane intake. Scott's intake
manifold looks much like a Ford cast iron DOAE-9424-L dual plane but is
cast in aluminum, slightly taller (around 10 mm or a bit more than 3/8")
with smaller ports that are sized more like a CHI 3V. Luckily the intake
was also designed to fit a 4V iron heads (port stuffed or not) so also
fits the A3 high port heads. Like the over-the-counter version of the
Boss 351 intake, it has two oval holes in the carb flange instead of the
four circular holes of the iron Ford intake. The one tested is one of
Scott's first generation intakes which he has since redesigned to work
better on larger displacement engines with good flowing heads. Given that
it's the earlier design, both Dave and I thought it might be out of its
element on my 403C but it surprised us. The dyno fuel log wouldn't clear
without a spacer so it was run with a couple of different 1" spacers,
making the best HP with HVH 4 hole spacer registering 569 HP @ 6350 RPM
and 511 ft-lbs @ 4750 RPM. Switching to a 1" open spacer, increased peak
torque to 514 ft-lbs @ 4700 RPM but HP wasn't quite as good. Pop the
mufflers off (or use the larger 3" inlet/outlet Magnaflows) and it might
make 575 HP with a street hydraulic roller. Not too shabby.

Paint the A3 heads and Cook intake Ford blue and no one would know it's not
a stocker. In fact, that set up would fit under the hood of my 1966 Mustang
fastback but would require notching the shock towers for high port header
clearance. The 225/60/15 tires would not be happy happy.gif

Intakes to follow include a Roush B351 and CHI 3V single planes. On an
earlier
test on the 351C dyno mule with CHI-3V heads, the very tall CHI intake
picked up
20 HP over the low profile Cook dual plane. Will the trend continue?
Stay tuned (same battle time, same bat channel).

Dan Jones
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