What year did the AMC 401 come out?
From 1971-1974 the 401 was available in the AMC Ambassador, Matador, and Javelin. Starting in 1972, the 401 was rated in the more stringent “net” horsepower ratings versus the previous “gross” ratings and it received a compression ratio drop in order to run on 87 octane unleaded fuel.
How much HP does a 401 AMC have?
The practical limit of the plebian AMC 401 is about 500 hp at 7,500 rpm.
How do I know if I have an AMC 401 engine?
Look on the block, just below the exhaust manifold on the drivers side. It will say 304, 360 or 401 if it’s an AMC but only the 304 was available in a CJ.
When did the AMC 401 V8 come out?
Got that one and today we have the big daddy of the lineup the AMC 401 V8. This engine came in on the ragged tail of the muscle car era (AMC was always a little late with anything good) and carried a rating a 330hp for that one shining year in 1971.
What are the casting numbers on an AMC?
There are a number of ‘replacement blocks’ AMC used from 1970-up with no casting numbers. It is not uncommon for someone selling a AMC to believe that their engine is a ‘390 or 401’ when in fact it is a 360 or 343. They all appear the same! So simply make sure and crawl under the vehicle. In Mexico AMC produced a “big Mexican Six” a bored of 282-6.
Is the AMC 390 the same as the 401?
There are a number of ‘replacement blocks’ AMC used from 1970-up with no casting numbers. It is not uncommon for someone selling a AMC to believe that their engine is a ‘390 or 401’ when in fact it is a 360 or 343. They all appear the same! So simply make sure and crawl under the vehicle.
How big is an AMC V8 engine block?
All 67-up AMC V8 blocks were cast, bored and stroked out of the same block. There is no such thing as a AMC BIG BLOCK all were SMALL BLOCKS. From 290, 304, 343, 360, 390, and 401.
Got that one and today we have the big daddy of the lineup the AMC 401 V8. This engine came in on the ragged tail of the muscle car era (AMC was always a little late with anything good) and carried a rating a 330hp for that one shining year in 1971.
There are a number of ‘replacement blocks’ AMC used from 1970-up with no casting numbers. It is not uncommon for someone selling a AMC to believe that their engine is a ‘390 or 401’ when in fact it is a 360 or 343. They all appear the same! So simply make sure and crawl under the vehicle. In Mexico AMC produced a “big Mexican Six” a bored of 282-6.
There are a number of ‘replacement blocks’ AMC used from 1970-up with no casting numbers. It is not uncommon for someone selling a AMC to believe that their engine is a ‘390 or 401’ when in fact it is a 360 or 343. They all appear the same! So simply make sure and crawl under the vehicle.
All 67-up AMC V8 blocks were cast, bored and stroked out of the same block. There is no such thing as a AMC BIG BLOCK all were SMALL BLOCKS. From 290, 304, 343, 360, 390, and 401.