This item has been shown 0 times.
Pontiac Ram Air IV
Pontiac Ram Air IV
Cylinder Heads #722(9796722)
by Nunzi's of New York
item up for sale today is a pair of ready to bolt on, 400 ci, Pontiac RAM AIR
IV cylinder heads that have light port work from Nunzi's Automotive Machine Shop
in Brooklyn, New York.
heads are rare.
1500 pairs were sold from 1969 - 1970.
is widely recognized as an expert in Pontiac repair and restoration.
porting job includes reworking of the very important short turn (short side
radius), smoothing of the pushrod guides (blending), and work in the bowl area
(decrease airflow turbulence). The intake
ports have gasket matched, to optimize air flow and reduce restriction. The intake port is NOT larger
than the gasket, at the face.
These cylinder heads flow BETTER than stock.
heads have been machined for positive seals and feature 7/16" screw-in
heads have been outfitted with top shelf quality parts!
valve springs, locks, and retainers are sourced from Competition Cams. The
springs are #999 solid roller springs, and the #732 retainers are titanium, as
well as the 10 degree locks. Seat pressure @ installed height of
1.875" is 225 lbs.
will also find BRONZE GUIDES and Manley STAINLESS STEEL valves installed in
these cylinder heads. Intake valves measure a stock 2.110"
diameter. Exhaust valves are 1.770" .
to be sure that these are the real deal, I had them flow benched at Greg's
Cylinder Heads & Engines in Riverview, Michigan.
intake and exhaust port flow is 257.5 CFM & 211.1 respectively.
are the results-
springs were also measured and inspected.
999 Springs are rated at 633 lbs and have a 1.550 outside diameter.
bind occurs at 1.090" of lift.
springs MAXED OUT Greg's test equipment at 500 lbs @ 0.425" of lift!!
The Ram Air IV
replaced the Ram Air II in 1969. The Ram Air IV used the RA II's camshaft but
lift in the RA IV was increased to .520 thanks to the use of 1.65 rocker arms (vs
1.50). The RA IV, like the RA II that preceded it, used round port cylinder
heads. From 1969 though 1970, the RA IV was
available in both A-Body (GTO/Judge) and F-body
(Firebird/Trans Am) form. While
1969-70 A-body RA IV production was low (1517) only 102 RA IV Firebirds and 55
Trans Ams were built in 1969. RA IV Trans Am production 'jumped' to 88 units
built in 1970. Today, any high compression round port Pontiac (i.e. RA II or RA
IV) is a highly sought after car due to its low production and superior
performance on the street and at the strip. After RA IV production ended,
Pontiac continued using its round port cylinder head design in 1971. However, by
this time compression had dramatically dropped off, marking the beginning of the
end of the muscle car era.
to Identify Ram Air IV
Pontiac cylinder heads is also a fairly straightforward procedure. This
process is made easier since the majority of Pontiac cylinder heads have the
casting number, or a portion of it, on the outside of the head (as opposed to
under the valve cover like many other makes). Determining which head you're
looking at is as simple as reading the casting number and the date code --
Some heads are missing either the casting number, (an example would be early
production '68 Ram Air II heads or some '73 Super Duty heads), while others
are missing date codes ('69 Ram Air IV and '70 Ram Air IV cast before
Most of the time, however, both date codes and casting numbers are found on
the heads. Early heads often used the entire casting number which is typically
seven digits. Later heads (from the mid-Sixties on) usually used only the last
two or three digits of the casting number. These numbers are usually found on
the exhaust side of the head, either just below the valve cover rail, on the
center two exhaust ports or on the end exhaust ports. Some heads carried the
casting number (or a portion thereof) below the spark plug holes between the
center and end exhaust ports.
in 1968, Pontiac fitted their highest-performing engines with heads featuring
redesigned round exhaust ports (shown above). Engines so equipped were the ‘68
Ram Air II 400, 1969-70 Ram Air IV 400, 1971-72 455 H.O., and 1973-74 Super Duty
SPRINGS, AND VALVES
1969 #722 CYLINDER HEADS
MACHINED BY NUNZI'S
LIGHT PORTING OF SHORT TURN, BOWL, AND
SPECIALLY MILLED FOR POSITIVE SEALS
COMPETITION CAMS SPRINGS, LOCKS, AND
COMPETITION CAMS #999 SPRINGS
COMPETITION CAMS #732 TITANIUM RETAINERS
10 DEGREE LOCKS
MANLEY STAINLESS STEEL VALVES
2.11" INTAKE / 1.77" EXHAUST
SCREW-IN 7/16 STUDS
Look closely at ALL of the
photos and ask questions before offerding.
PAY IN FULL WITHIN 7 DAYS OF sale END.
WILL NOT END sale EARLY, DO NOT ASK!
$25.00 Crate/Packaging Fee
Shipping will be arranged at
time of purchase...
Winner pays ACTUAL shipping
cost based on zip code.
Or, you can PICK IT UP.