Question

Rozz · Dec 14, 2014

Does anyone know what the ( R ) stands for in the CJ-R.

My marti report shows engine as a 429 CJ-R, I know the CJ stands for cobra jet but, what's the R?

rocket366 · Dec 14, 2014

thinking

R= Ram air

Boss1Ray · Dec 14, 2014

correct - Ram Air.

Here is some reading that explains a little:

https://books.google.com/books?id=12Unsmyljk4C&pg=PA123&lpg=PA123&dq=CJ+vs+429++CJ-R&source=bl&ots=dv5GZ6oVzR&sig=zXyW_WPo0nZEhCsZNFEkQnQrgiI&hl=en&sa=X&ei=GFSOVLrmCYnnoASD94KABg&ved=0CCEQ6AEwAQ#v=onepage&q=CJ%20vs%20429%20%20CJ-R&f=false

Ray

Rozz · Dec 14, 2014

Thanks guys. Is that the same for the DOOE-R heads?

Boss1Ray · Dec 15, 2014

No. The - R indicates an engineering change to the original casting = the 18th version for the D0OE-6090 head. The letter following the casting number is always an indication of these changes.

Factory CJ and SCJ motors both carried the same DOOE-R Part Numbered Head castings. We are talking about Factory Iron Heads. CJ motor = Hyd Cam, SCJ Motor = Solid Cam

from http://www.429-460.com/t5674-dove-vs-dooer-heads

Ray

Rozz · Dec 15, 2014

Thanks Boss 1.

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