[DeTomaso] FW: Which 351 in each year

Michael Shortt michaelsavga at gmail.com
Mon Jun 11 19:06:25 EDT 2007


I was just curious,
Mine was, as you suggest an early ( June 1971, #1660 ) car.

all the articles, advertising, reviews and  year to year specs all seem to
declare 330hp, that's why I was curious since that didn't seem possible
unless they were all Boss 351 engines (R).
For sure not on my car or I would look for numbers, my car has virtually
nothing left in the engine department that was on a stock Pantera.

Michael in Savannah



On 6/11/07, B. Seib <oldwheel at mts.net> wrote:
>
> Michael
> If this is the original factory supplied engine for your car, it would
> have
> been the 351C-4V with closed chamber high comp heads (64.6-67.6 cc), 2
> bolt
> mains, very mild hyd. cam.(.427/.453 lift). The carb would have been a
> Motorcraft 4300A, # D10F-EA. I think it's too early to have the larger
> spreadbore 4300D. It would have had a single point distributor, D0OF-V.
>
> When Ford added the 4 bolt mains, dual point distributor, bigger carb, and
> CJ cam in 72, the compression dropped at the same time. The 71 BOSS 351 is
> the only factory 351C that got all the good stuff and a solid lifter
> cam....but Ford era Panteras never got that engine at the factory....as
> far
> as I know.
>
> Barry
>
> >>>FWIW, this is what I have in my early 71, #1512
>
> www.portata.com/panteraadventure/images/PB093602.JPG
>
>
>
>
> -----Original Message-----
> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com]
> On
> Behalf Of Michael Shortt
> Sent: Monday, June 11, 2007 12:18 PM
> To: List DeTomaso
> Subject: [DeTomaso] Which 351 in each year
>
> Just looking around and researching 351 engines.
> Exactly which specific model came in the cars originally in each year.
> If one believes the stated HP ratings, then most were "Boss 351" with 330
> hp.
>
> Here's the poop.
>
>
> The 335 series was very different internally from the similar-looking
> Windsor series. The 335 Cleveland used smaller 14 mm spark plugs in one of
> two different cylinder heads, both with 2 valves per cylinder. The
> *4V*heads had massive valves canted to the sides with a "poly-angle"
> combustion
> chamber. A novel feature is the heads are not straight - they are
> horizontal
> in front and angled in the rear with an integrated twist. These covers are
> secured with 8 bolts, as opposed to 6 on the Windsor.
>
> A simple differentiator between the Windsor and Cleveland series is the
> location of the radiator hose - the Windsor routed coolant through the
> intake manifold, with the hose protruding horizontally, while the
> Cleveland
> had a dry manifold with the radiator hose connecting vertically to a
> separate timing chain cover.
>
> Inside the block, large main bearing caps are specified for durability,
> allowing 4-bolt mains on some engines. The oiling system has been widely
> criticized but has not proven any less reliable than the Windsor line.
>
> [edit<
> http://en.wikipedia.org/w/index.php?title=Ford_335_engine&action=edit&
> section=2>
> ] 351 Cleveland *351 Cleveland engines*  Code Engine type Years
> Compression
> Notes H 351C-2V 1970-1974 Low  M 351C-4V 1970-1971 High  R 351C-4V
> "Boss 351<http://en.wikipedia.org/wiki/Ford_Boss_351_engine>
> " 1971 High Very rare, solid lifters R 351C-4V HO 1972 Low Very rare,
> solid
> lifters Q 351C-4V "Cobra-Jet" May 1971-1974 Low  *See also the
> Cleveland-derived Boss
> 351<http://en.wikipedia.org/wiki/Ford_Boss_351_engine>and quite
> different 351
> "Windsor" <http://en.wikipedia.org/wiki/Ford_Windsor_engine#351W>*
>
> The *351 Cleveland* was introduced in 1969 as Ford's new performance car
> engine and was built through the end of the 1974 model year. It
> incorporated
> elements learned on the 385
> big-block<http://en.wikipedia.org/wiki/Ford_385_engine>series and the
> Boss
> 302 <http://en.wikipedia.org/wiki/Ford_Boss_302_engine>, particularly the
> poly-angle combustion chambers with canted valves and the thin-wall
> casting
> technology.
>
> Both a *4V* (4-barrel carburetor) performance version and a *2V* (2-barrel
> carburetor) basic version were built, both with 2 valves per cylinder. The
> latter had a different cylinder head with smaller valves, smaller ports,
> and
> open combustion chambers to suit its intended applications.
>
> Only the Q-code 351 "Cobra Jet" (1971-1974), R-code "Boss" 351 (1971), and
> R-code 351 "HO" (1972) versions have 4-bolt mains although all 335 series
> engines (351C/351M/400M) have space for them even in 2-bolt main form. The
> main difference between 351W/351C/351M/400M engines is connecting rod
> length
> and main bearing size. The 351/400M engines have the largest bearing size
> and the tallest deck height while sharing the 429/460 bell
> housing<http://en.wikipedia.org/wiki/Bell_housing>pattern. The 351C
> engine has a medium main bearing size and shorter
> connecting rods than the 351W and the 351/400M while retaining the SBF
> bellhousing pattern. The 400M engine has the longest stroke of any SBF or
> 335 series engine.
>
> All of the 351C and 351/400M engines differ from the 302/351W by having an
> integrated timing cover casting in the front of the block to which the
> radiator hose connects.
>
> H-code
> <
> http://en.wikipedia.org/wiki/Image:1973_Ford_Mustang_convertible_351-2V_Cle
> veland.JPG>
> <
> http://en.wikipedia.org/wiki/Image:1973_Ford_Mustang_convertible_351-2V_Cle
> veland.JPG>
> 1973 H-code 2V 351 Cleveland
>
> The majority of 351 Cleveland engines are H-code 2V (2-venturi
> carburettor)
> versions with low compression. These were produced from 1970 through 1974
> and were used on a variety of Ford models from compact to intermediate.
>
> M-code
>
> The M-code version was produced from 1970 through 1971. It used a high
> 11.1 compression
> ratio <http://en.wikipedia.org/wiki/Compression_ratio> with "4V"
> quad-barrel
> carburetors and the quench head-design 4V heads. Hydraulic lifters were
> also
> specified, with the M-code producing about 300 hp (224 kW). 2-bolt main
> caps
> were used along with a cheaper cast iron intake manifold.
>
> 1971 R-code (Boss 351) *See also Ford Boss 351
> engine<http://en.wikipedia.org/wiki/Ford_Boss_351_engine>
> *
>
> The 1971 R-code "Boss 351" used higher compression (11.7:1) with the
> quench
> head 4V heads, solid lifters, an aluminum intake manifold, and 4-bolt main
> caps. It produced about 330 hp (246 kW).
>
> 1972 R-code
>
> The R-code 351 Cleveland for 1972 was considerably different. It had
> reduced
> compression for emissions compliance and used open-chamber heads. It had a
> Hydraulic camshaft, however a four barrel carburetor was retained. It
> produced 277 hp (207 kW) using the new SAE net system.
>
> Q-code (Cobra-Jet)
>
> The Q-code "351 Cobra Jet" version was produced from May 1971 through the
> 1974 model year. It was a low-compression design that included a special
> intake manifold, solid camshaft, special valve springs and dampers, a 750
> CFM 4300-D Motorcraft Carburetor, dual-point distributor, and 4-bolt main
> bearing caps. It was rated at 266 hp (198 kW) (SAE net) for 1972 when
> installed in the Mustang <http://en.wikipedia.org/wiki/Ford_Mustang>, 262
> hp
> in fullsize Fords and 248 hp in the Ford
> Torino<http://en.wikipedia.org/wiki/Ford_Torino>and Mercury
> Montego <http://en.wikipedia.org/wiki/Mercury_Montego>. The rating
> remained
> 266 hp for the Mustang and dropped to 246 hp (183 kW) for the intermediate
> Ford and Mercurys for 1973. The 351 CJ was rated at 255 hp in 1974 and was
> only installed in the Ford Torino
> <http://en.wikipedia.org/wiki/Ford_Torino>,
> Mercury Montego <http://en.wikipedia.org/wiki/Mercury_Montego> and the
> Mercury
> Cougar <http://en.wikipedia.org/wiki/Mercury_Cougar>.
>
>
> --
> Michael L. Shortt
> Savannah, Georgia
>
>
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-- 
Michael L. Shortt
Savannah, Georgia


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