No Limits Magazine from Wild About Cars
Profiling High Performance Cars and the Golden Era of Detroit Iron
- We Bring History to Life and Put Resources in the Hands of the Enthusiast -
Monday May 5, 2014
Ford's "Cleveland" V8, '57 Packard, '63 Cadillac, & ' Four 69 Porsches, '83 Turbo Riviera Poster, Lingenfelter Expands - and More!

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Today's Story -
Ford's "Cleveland" starts the manufacturer's move to canted valve V8s
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A 426 Max Wedge - and more

1964 Plymouth Fury - Randy Scheuermann's Max Wedge Tribute

1967 Dodge GTS Test

1967 Dodge Dart GTS 383 Road Test

1946-1974 Paint Codes

1946-1979 Cadillac Paint Codes
and Paint Mix Codes

The 1969 Boss 302

The Boss 302 both revitalized and redefined
small block performance at Ford in the 70s.

302 Tunnel Port Compared to Cleveland

The Tunnel Port heads (top) had even bigger intake
ports than the Cleveland head.

The Difference in the Cleveland

The cast-in front cover easily identifies a
"Cleveland" block versus the Windsor Series.

by Wild About Cars Staff - reprint with permission only.

Why the Boss 302 - Because Ford's "Tunnel Port" does not cut it.
Ford produced an interesting variation on the "Windsor" small-block that was never available on any street car, was called the TP (Tunnel-Port) 302. Actually, there was one "official" street Mustang with the TP V-8: a Mustang that Car and Driver magazine tested against a 1968 Z/28 Camaro.

The thinking behind the 302 TP was similar to that of the 427 TP engine. By having the pushrods fit inside a sleeve, the intake port could be enlarged, thereby increasing the quantity of fuel-air mixture that the heads could flow by giving a more direct shot to the intake valve. The valves on the engine were 2.12" intake and 1.54" exhaust. The street version of the engine was to come with two 540-cfm Holley four-barrel carburetors. (See an expose of this engine here).

The unfortunate problem with the TP heads was that the ports were much too large. In order to produce power, the TP had to be revved up to 8,000 to 9,000 rpm. This made the engine not tractable and was beyond the safe limit for the 302's bottom end. The result was disappointing performance and unreliability in the SCCA Trans Am Series for which it was intended.

Ford realized that this was not the solution for both street and racing small block applications, and a fix was on the way - the "Boss 302".

Enter the BossĀ 302
This is considered the highest-performance version of Ford's 90-degree V-8 family from a HP to cubic inches perspective. It was available for only two model years, 1969 and 1970, in the Mustang Boss 302 and in 1970 on the Mercury Cougar Eliminator. The engine was built so Ford could use it in SCCA's Trans-Am Series and the rules required that at least 1,000 Mustangs had to be built with this engine. It was so popular that production reached 1,628 in 1969, and surged to 7,013 in 1970. In 1970, 450 Cougar Eliminators were Boss 302-equipped.

The major difference between the Boss 302 and 302 Windsors were the cylinder heads. The Boss 302 heads were almost the same as those that were to be used on Ford's new 335 Cleveland engine family in 1970. Because the new 335 engine series used the same bore spacing and head bolt pattern as the Windsor engine family, the heads would fit the 302 engine block. All that was done was to change water passages to align with the Windsor 302.

The difference was that the Windsor had its valves arranged in a straight line, whereas the valves on the Boss 302 were canted, just like those introduced on Chevrolet's big-block V-8 in 1965. Canting the valves allows for larger valves and more efficient port design, which results in better engine breathing.

The ports of the Boss 302 cylinder heads were much larger than the regular Windsor small-block heads. The valves were also much larger; 2.23" intake and 1.71"exhaust. These were determined to be too big for street use, and the 1970 Boss 302 heads came with slightly smaller intake valves, at 2.19". The same heads, with different water passages, were those used on the 1970-1974 351C engines with four-barrel carburetors . . .

To read more about the Cleveland Small Block - Click HERE!

To see the Boss 302 Engine exposed in period magazines - Click HERE

To see a 1969 Boss 302 Road Test - Click Here!

To see a 1970 Boss 302 Road Test - Click Here!

To See the Boss 302 Brochure - Click HERE!

To See Boss 302 Ads - Click HERE!


More Stories at Wild About Cars and the Auto History Digital Documents Library
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1957 Packard Clipper Test 1957 Packard Clipper Road Test

OK perhaps many of you don't remember what happened to Packard - but suffice it to say that when Packard bought Studebaker, the loser was Packard - who ended up becoming a fancy Studebaker. Yup - don;t ask why. Meanwhile, Motor Life Magazine tested the 1957 Packard Clipper in their may 1957 issue. We'll leave you with ML's conclusion: "They aren't cut from the traditional Packard cloth . . ." By 1959 Packard was gone - 'nuff said.

Click here to read about the 1957 Packard Clipper Test!

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1963 Cadillac Test 1963 Cadillac Cross-Country Test!

Motor Trend Magazine took a Cadillac Coupe De ville cross country in and reported on it in their January 1963 issue. Their words " Cadillac's design and engineering skills produce a beautiful blend of quiet comfort, effortless performance, and flawless workmanship". Maybe GM ought to read this test to see why they were "the standard of the world" back then.

To read the 1963 Cadillac Test - Click HERE!

1966 Chrysler 300 TNT Test 1969 Porsche 4-car 911-912 Road Test

Car and driver Magazine went whole hog in their test of all the available Porsches in their March 1969 issue. What makes this test even more interesting is that their evaluator was Mark Donohue! Read the conclusions - and find out which one was Mark's favorite.

To read this 4-car Porsche Test - Click HERE!

1983 Buick Riviera Pace Car Poster Modern Muscle - 1983 Buick Riviera, Indy 500 pace car Poster!

OK, after the demise of the Stage 1 455 in 1975, we tend to think of Rivieras as sleds. But Buick had other ideas, and their Turbo package could get the luxo car moving along quite well. In 1983 the stuffed the baddest turbo they had in one a Riviera convertible and paced the Indy 500 in it. Of course, you couldn't buy one but who cares. Check it out!

To see the 1983 Buick Riviera Pace Car Poster - Click HERE!

Hamlin Wins Taladega Race News - Denny Hamlin, Toyota win NASCAR Cup race at Talladega

In his 300th NASCAR Sprint Cup Series start, Denny Hamlin overtook Kevin Harvick coming to the white flag to win the Aaron's 499 at Talladega (Ala.) Superspeedway. The win awarded the 33-year-old driver his first points-paying triumph at a restrictor plate track and virtually ensured him a berth into the Chase for the NASCAR Sprint Cup.

Click here to read more about Hamlin's win in Autoweek Race News!

Lingenfelter Expands
Product News - Lingenfelter Performance Engineering Expands Operations

In keeping with its expansion strategy, Lingenfelter Performance Engineering has opened a new, multi-purpose facility in Wixom, Mich., to keep pace with growing demand for the company's performance products and services. It is located at 47451 Avante Drive. The new 30,000 square-foot facility is an addition to Lingenfelter Performance Engineering's (LPE) original engine and vehicle build operations located in Decatur, Ind . . .

CLICK HERE to read about Lingenfelter Performance!.

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