A body big block cam specs

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71scamp78

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Just curious what the specs were on a 68 A body big block 383 car. Since they were rated at 300 hp I assume smaller cam but hp loss may be due to the restrictive manifold
 
Little foggy, but I thought it was same cam as 440 Magnum.... if not, very close to. TNT and Magnum 440's managed 375 hp, as opposed to vanilla 440's at ~330.
 
I believe that the 67 and 68 cars got the old 383 4 barrel cam, and in 69 they got the Roadrunner/Magnum cam and the rating went up to 330 HP.
 
At least in '67 and '68 the engine is the same from the "B" and "C" bodies. Rated at 330hp in a "B" body but 290 in a "A" body. Same engine, cam same everything.
 
I actually love how Mopar used tiny camshafts in comparison to say, GM to get the job done. They just didn't need all that nonsense to go fast.
 
Murray said:
At least in '67 and '68 the engine is the same from the "B" and "C" bodies. Rated at 330hp in a "B" body but 290 in a "A" body. Same engine, cam same everything.
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67 and 68 383’s are very different.

67 383 had closed chambered heads and a small CFM AFB with the narrow bolt pattern. A bodies had a one year only left manifold with the most restrictive dog leg. B and C bodies all had log manifolds on 383-4bbl

68 383 all had 906 heads with a 2806301 intake and A 625ish AVS. The a body exh manifold got better and all 4 bbl engines in B and C body had HP exhaust manifolds. The only 330 horsepower engine was in a road runner or super bee with no A/C. They had the 440 magnum cam, not in any other 383’s. A c-body never had a 330 horse 383.

so the entire top end changed for 1968.
 
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413 said:
67 and 68 383’s are very different.

67 383 had closed chambered heads and a small CFM AFB with the narrow bolt pattern. A bodies had a one year only left manifold with the most restrictive dog leg. B and C bodies all had log manifolds on 383-4bbl

68 383 all had 906 heads with a 2806301 intake and A 625ish AVS. The a body manifold got better and all 4 bbl engines in B and C body had GP exhaust manifolds. The only 330 horsepower engine was in a road runner or super bee with no A/C. They had the 440 magnum cam, not in any other 383’s. A c-body never had a 330 horse 383.
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Think that is the numbers on my intake. I'm sure a cam change , headers, aluminum intake and a 650 would wake it up a lot..probably get 50 to 75 hp gains
 
Little, for torque and reliability. Might be .430 or .450 lift
 
RustyRatRod said:
I actually love how Mopar used tiny camshafts in comparison to say, GM to get the job done. They just didn't need all that nonsense to go fast.
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Gm rocker ratios we're higher than Mopar too
 
Yes 383 A's were a tad choked they say!

68/69 had the best flowing exhaust. 335HP in 69.

The 69 383 Fish used the same cam as the RR and SBEE. The 383 receives up to the 292/509 just fine. Advance it 4 degrees and bamm!

You have a good low end/high end combo JMO! And as far as the 68/69 exhaust manifolds choking it as compared to the B-bodies, I call mostly BS!

My fish had run mid 7's on the 1/8th in the 80's with its stock exhaust.
 
1969383S said:
Yes 383 A's were a tad choked they say!

68/69 had the best flowing exhaust. 335HP in 69.

The 69 383 Fish used the same cam as the RR and SBEE. The 383 receives up to the 292/509 just fine. Advance it 4 degrees and bamm!

You have a good low end/high end combo JMO! And as far as the 68/69 exhaust manifolds choking it as compared to the B-bodies, I call mostly BS!

My fish had run mid 7's on the 1/8th in the 80's with its stock exhaust.
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Bone stock mid 7
 
Is this going by the way of the 6500 RPM stock 318 2bbl?
 
I read an article yesterday on the California Highway Patrol 1969 Dodge Polara with the E86 engine code 440 Magnum. It read as follows:

"The California Highway Patrol even had its own cam grind."

Does anyone know what specs that camshaft has? How is it different from the standard 440 Magnum camshaft?
 
Lamm said:
I read an article yesterday on the California Highway Patrol 1969 Dodge Polara with the E86 engine code 440 Magnum. It read as follows:

"The California Highway Patrol even had its own cam grind."

Does anyone know what specs that camshaft has? How is it different from the standard 440 Magnum camshaft?
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One of the biggest myths surrounding the CHP1969 Polara, there are no records of the CHP having a special cam.
I have records that comment on the changes, nothing with the engine.
The engine has the same assembly number as my other 1969 HP 440 Polara.
It is the same assembly number found on the broadcast sheet of other cars with the HP 440 in 69.

Show me documentation or it didn't happen.


Alan
 
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Cuda Al said:
One of the biggest myths surrounding the CHP1969 Polara, there are no records of the CHP having a special cam.
I have records that comment on the changes, nothing with the engine.
The engine has the same assembly number as my other 1969 HP 440 Polara.
It is the same assembly number found on the broadcast sheet of other cars with the HP 440 in 69.

Show me documentation or it didn't happen.


Alan
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While no documentation, I have heard that certain CHP mechanics were doing cam swaps. Small offices like Madera (from the story I heard) were more likely than larger ones.
 
Jim Lusk said:
While no documentation, I have heard that certain CHP mechanics were doing cam swaps. Small offices like Madera (from the story I heard) were more likely than larger ones.
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Whereas that may be true it doesn't count.


Alan
 
Cuda Al said:
Whereas that may be true it doesn't count.


Alan
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I agree, but it may where the urban legend came from. I've heard (second hand) that the Madera based officers used to like climbing on the rears of Corvettes and pulling them over when the puffs of blue smoke came out...Could also be urban legend...
 
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