Re: IML: 66 Imperial Camshaft Spec's

[mjusten@xxxxxxxxxxx]

Rodger

 

Thanks for the info.  I want a smooth idling and quiet Imperial.  Is that p4286675 # available over the counter?

Any Dodge dealer?

Do you know if there's any differances with the lifters?  Like i said earlier, PAW catalog shows lifters  from Crane and everybody else in 2 categories.  58-67 and 68-78.  Does that sound logical to you?

 

Also I like those exhaust manifolds form 1aauto.  The exhaust pipes have to be modified to fit the longer drop, correct?

 

Marty

 

 

> -------------- Original message -------------- 
> From: FltSgt@xxxxxxx 
>
> > Hola 
> > 
> > MoPar has been producing the big block and raised big block since 1958 and 
> > 1959. From the beginning until even now they have had many many years to 
> > figure our how to make the most of their power plants. The raised block version 
> > had the 413 cubed engine in Imperials from 1959 until 1965. Starting in 1966 
> > the 413 became the 440 as we know. The 1967 Imperial's weight was lower than 
> > the 1966 year. As we also know the 413 and 440 was used in vehicles that weigh 
> > less than any stripped version of the 59 to 66 Imperial. 
> > 
> > What this means is the cams that work in a lighter vehicle do not work 
> > correctly in a heavy vehicle as the framed Imperials. That is why I said to 
> > Marty 
> > of which type or style of cam 
> to use, the now called RV spec'd version. 
> > 
> > The 1966 Imperial had a intake duration of 252 and the exhaust duration was 
> > 260 degrees. The intake valves had a lift of 0.425" and the exhaust valves 
> > were 0.435". In 1967 the spec's for the lighter Imperial had been raised to 
> > 256/260 duration and the same lift for the regular engine and 268/284 and a lift 
> > of 0.450"/0.458" for what they called the power pack engine. 
> > 
> > To translate this to todays lanuage means the MoPar Cam # P4286675 ( 260/260 
> > degrees duration and a lift of 0.430/ 0.430 ) , which is slighty "better" than 
> > 1966's cam or # P 4452783 ( 268/284 duration and the lift is 0.450/ 0.458" ) 
> > for the 1967 power pack cam. 
> > 
> > To me, the cams or whatever of other companies have is just a copy of what 
> > MoPar has been doing since 1959 in our RB's . The porting template is # P 
> > 4120437 ( if you want this, just email 
> me ... not the club ). 
> > 
> > There is a infamous MoPar HP exhaust manifold for the framed 1959 to 1966 
> > Imperials. This exhaust manifold is a bolt on/in that does not need a five lb. 
> > hammer or the such. If you have this year of car, please look at this ( 
> > http://www.1aauto.com/1A/ExhaustManifolds/Dodge/PickupFullSize/PLP1390041/67559 
> > ). 
> > 
> > Uncle Rodger & Aunt Gabby 
> > Colo Spgs 
> > 
> > 
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