What kind of intake manifold do I need for AMC 258?

The folks at Howell say I simply need a 2-bbl manifold off a 258 engine to make it happen. There are two different intake manifolds for a 258. The older style is made of cast iron and is connected to the exhaust manifold. The newer style is all aluminum, and is separate from the exhaust manifold.

When did the AMC 258 engine come out?

There are two generations of 258 engines. The first generation was introduced in 1971. This earlier engine has cast iron intake and exhaust manifolds with the two manifolds bolted together by 4 bolts and a gasket between. In 1981, AMC revised the 258 for lighter weight. A new block casting and fewer crankshaft counterweights were used.

How many Offenhauser intake manifolds are there?

Intake Manifold, Dual Port, Aluminum, Natural, Square Bore, AMC/Jeep, 199, 232, 258, L6, Each Part Number: OFY-5999DP More Detail… Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States. Part Number: OFY-6258C More Detail…

What’s the compression ratio on an AMC 258?

The 258 can be identified by the 4th character of the engine build date code (“A”, “B”, “C” or “M”), stamped into the engine block below and between the number 2 and 3 spark plugs. An engine stamped with “B” is an early 258 with a 7.6:1 compression ratio.

What kind of exhaust manifold does AMC 258 I6 use?

This earlier engine has cast iron intake and exhaust manifolds with the two manifolds bolted together by 4 bolts and a gasket between. In 1981, AMC revised the 258 for lighter weight. A new block casting and fewer crankshaft counterweights were used. A new smoother exhaust manifold and aluminum intake manifold were introduced.

Are there performance parts for the 258 inline six?

Im planning one finding another block soon and build a high performance engine. :beer: http://www.cliffordperformance.com/ they have some performance parts for the 258 inline six. ‘Pane! those engines run way better on it! :smokin:

What kind of engine does an AMC 258 I6 have?

The 258 inline 6 (I6) engine always came from the factory carbureted any many people complain about the Carter BBD carburetor and the maze of emmissions vacuum hoses. There are a couple articles below that can help you sort through those hoses and tune the Carter BBD. For a carbureted engine, the 258 with the Carter BBD performs very well off road.

What was the length of the AMC 4.0 engine?

Connecting rod length was 6.125″ – similar to the discontinued 199 which was phased out in 1970. The 4.0 is one of AMC’s best-known engines. It was one of four AMC engines kept in production when Chrysler bought AMC in 1987. Chrysler engineers continued to refine the engine to reduce noise, vibration, and harshness.

Are there any problems with the AMC flathead engine?

When the flathead model was reintroduced it also received the new water pump. Equipped with such high quality parts as forged crankshafts and connecting rods, these engines earned a reputation for remarkable durability. The flathead, however, was prone to the typical flathead problem of overheating under sustained heavy load.

Is the AMC I6 engine compatible with other engines?

AMC I6 (and V8) engines do not share block bolt patterns with any other engine, including all Willys, Kaiser and Chrysler engines. The I6 is natively and otherwise compatible with several great transmissions. Some popular choices in Jeeps include: In 2006, DaimlerChrysler pulled the plug on the I6, ending its 36 year run in Jeeps.

When did the AMC straight six engine come out?

The AMC straight-six began life at AMC as the Typhoon, a 232 CID engine, in the 1964 Rambler American. It was installed into the FSJ Jeeps for the first time in 1971, one year after AMC’s purchase of Jeep from Kaiser. It replaced the competing Buick 225 engine, (whose tooling and rights AMC would soon sell back to Buick).

How much HP can be pushed out of a 258?

Transmission isn’t a problem. Use a late model 258 bell and a Mustang T-5. You would do exactly the same thing as using a T-5 on an AMC V-8, only you wouldn’t have to worry about breaking the T-5. You should be okay with a non-world class T-5, but a WC model would be better. The six bell is uesd in the V-8 conversion.

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