Does anybody have the original camshaft specifications for the '76 CJ-7 258
6 cylinder engine?
If I need to replace mine, what are good grinds to consider? Crane makes
one for a 1000 RPM starting point that's made for fuel economy and another
that produces a smooth idle but better performance in a little higher RPM
range.
What are your preferences?
o_o_o_o
Best Regards, /| ,[_____],
Jim, WP3JQ |ŻŻŻL --O|||||||O-
()_)Ż()_) ŻŻŻŻŻ )_)
EM60qk 30.447439N 086.628959W

 

Hi Jim,
Stock you have have 248 degrees of duration:
http://www.jpmagazine.com/techarticl...mage_large.jpg typical of
a one barrel low Revolution Per Minute SMOG motor. If you don't have to
worry about the SMOG *****, then go for about 290 degrees like was used
stock on most V8s of the sixties. Of course you will have to change to a
two barrel 500 cubic Feet Per Minute Holley or Weber carburetor to use
the horse power in the four to six grand range. I use 330 degrees, half
inch lift, 350 pound closed valve, six grand rev kit, Holley 850, 2 1/8
Hookers : http://www.----------.com/pismo.htm Chevrolet of course.
God Bless America, ßill O|||||||O
mailto:--------------------

Drink wrote:
>
> Does anybody have the original camshaft specifications for the '76 CJ-7 258
> 6 cylinder engine?
> If I need to replace mine, what are good grinds to consider? Crane makes
> one for a 1000 RPM starting point that's made for fuel economy and another
> that produces a smooth idle but better performance in a little higher RPM
> range.
> What are your preferences?
> o_o_o_o
> Best Regards, /| ,[_____],
> Jim, WP3JQ |ŻŻŻL --O|||||||O-
> ()_)Ż()_) ŻŻŻŻŻ )_)
> EM60qk 30.447439N 086.628959W

 

Hi Jim,
Stock you have have 248 degrees of duration:
http://www.jpmagazine.com/techarticl...mage_large.jpg typical of
a one barrel low Revolution Per Minute SMOG motor. If you don't have to
worry about the SMOG *****, then go for about 290 degrees like was used
stock on most V8s of the sixties. Of course you will have to change to a
two barrel 500 cubic Feet Per Minute Holley or Weber carburetor to use
the horse power in the four to six grand range. I use 330 degrees, half
inch lift, 350 pound closed valve, six grand rev kit, Holley 850, 2 1/8
Hookers : http://www.----------.com/pismo.htm Chevrolet of course.
God Bless America, ßill O|||||||O
mailto:--------------------

Drink wrote:
>
> Does anybody have the original camshaft specifications for the '76 CJ-7 258
> 6 cylinder engine?
> If I need to replace mine, what are good grinds to consider? Crane makes
> one for a 1000 RPM starting point that's made for fuel economy and another
> that produces a smooth idle but better performance in a little higher RPM
> range.
> What are your preferences?
> o_o_o_o
> Best Regards, /| ,[_____],
> Jim, WP3JQ |ŻŻŻL --O|||||||O-
> ()_)Ż()_) ŻŻŻŻŻ )_)
> EM60qk 30.447439N 086.628959W

 

Hi Jim,
Stock you have have 248 degrees of duration:
http://www.jpmagazine.com/techarticl...mage_large.jpg typical of
a one barrel low Revolution Per Minute SMOG motor. If you don't have to
worry about the SMOG *****, then go for about 290 degrees like was used
stock on most V8s of the sixties. Of course you will have to change to a
two barrel 500 cubic Feet Per Minute Holley or Weber carburetor to use
the horse power in the four to six grand range. I use 330 degrees, half
inch lift, 350 pound closed valve, six grand rev kit, Holley 850, 2 1/8
Hookers : http://www.----------.com/pismo.htm Chevrolet of course.
God Bless America, ßill O|||||||O
mailto:--------------------

Drink wrote:
>
> Does anybody have the original camshaft specifications for the '76 CJ-7 258
> 6 cylinder engine?
> If I need to replace mine, what are good grinds to consider? Crane makes
> one for a 1000 RPM starting point that's made for fuel economy and another
> that produces a smooth idle but better performance in a little higher RPM
> range.
> What are your preferences?
> o_o_o_o
> Best Regards, /| ,[_____],
> Jim, WP3JQ |ŻŻŻL --O|||||||O-
> ()_)Ż()_) ŻŻŻŻŻ )_)
> EM60qk 30.447439N 086.628959W

 

Thanks for the info, Bill. You really recommend 290deg cam for the CJ?
Sounds like a full-race application. How much loss will that impact low
RPM's?
o_o_o_o
Best Regards, /| ,[_____],
Jim, WP3JQ |ŻŻŻL --O|||||||O-
()_)Ż()_) ŻŻŻŻŻ )_)
EM60qk 30.447439N 086.628959W
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:40412F77.528B0D63@***.net...
> Hi Jim,
> Stock you have have 248 degrees of duration:
> http://www.jpmagazine.com/techarticl...mage_large.jpg typical of
> a one barrel low Revolution Per Minute SMOG motor. If you don't have to
> worry about the SMOG *****, then go for about 290 degrees like was used
> stock on most V8s of the sixties. Of course you will have to change to a
> two barrel 500 cubic Feet Per Minute Holley or Weber carburetor to use
> the horse power in the four to six grand range. I use 330 degrees, half
> inch lift, 350 pound closed valve, six grand rev kit, Holley 850, 2 1/8
> Hookers : http://www.----------.com/pismo.htm Chevrolet of course.
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Drink wrote:
> >
> > Does anybody have the original camshaft specifications for the '76 CJ-7
258
> > 6 cylinder engine?
> > If I need to replace mine, what are good grinds to consider? Crane
makes
> > one for a 1000 RPM starting point that's made for fuel economy and
another
> > that produces a smooth idle but better performance in a little higher
RPM
> > range.
> > What are your preferences?
> > o_o_o_o
> > Best Regards, /| ,[_____],
> > Jim, WP3JQ |ŻŻŻL --O|||||||O-
> > ()_)Ż()_) ŻŻŻŻŻ )_)
> > EM60qk 30.447439N 086.628959W

 

Thanks for the info, Bill. You really recommend 290deg cam for the CJ?
Sounds like a full-race application. How much loss will that impact low
RPM's?
o_o_o_o
Best Regards, /| ,[_____],
Jim, WP3JQ |ŻŻŻL --O|||||||O-
()_)Ż()_) ŻŻŻŻŻ )_)
EM60qk 30.447439N 086.628959W
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:40412F77.528B0D63@***.net...
> Hi Jim,
> Stock you have have 248 degrees of duration:
> http://www.jpmagazine.com/techarticl...mage_large.jpg typical of
> a one barrel low Revolution Per Minute SMOG motor. If you don't have to
> worry about the SMOG *****, then go for about 290 degrees like was used
> stock on most V8s of the sixties. Of course you will have to change to a
> two barrel 500 cubic Feet Per Minute Holley or Weber carburetor to use
> the horse power in the four to six grand range. I use 330 degrees, half
> inch lift, 350 pound closed valve, six grand rev kit, Holley 850, 2 1/8
> Hookers : http://www.----------.com/pismo.htm Chevrolet of course.
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Drink wrote:
> >
> > Does anybody have the original camshaft specifications for the '76 CJ-7
258
> > 6 cylinder engine?
> > If I need to replace mine, what are good grinds to consider? Crane
makes
> > one for a 1000 RPM starting point that's made for fuel economy and
another
> > that produces a smooth idle but better performance in a little higher
RPM
> > range.
> > What are your preferences?
> > o_o_o_o
> > Best Regards, /| ,[_____],
> > Jim, WP3JQ |ŻŻŻL --O|||||||O-
> > ()_)Ż()_) ŻŻŻŻŻ )_)
> > EM60qk 30.447439N 086.628959W

 

Thanks for the info, Bill. You really recommend 290deg cam for the CJ?
Sounds like a full-race application. How much loss will that impact low
RPM's?
o_o_o_o
Best Regards, /| ,[_____],
Jim, WP3JQ |ŻŻŻL --O|||||||O-
()_)Ż()_) ŻŻŻŻŻ )_)
EM60qk 30.447439N 086.628959W
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:40412F77.528B0D63@***.net...
> Hi Jim,
> Stock you have have 248 degrees of duration:
> http://www.jpmagazine.com/techarticl...mage_large.jpg typical of
> a one barrel low Revolution Per Minute SMOG motor. If you don't have to
> worry about the SMOG *****, then go for about 290 degrees like was used
> stock on most V8s of the sixties. Of course you will have to change to a
> two barrel 500 cubic Feet Per Minute Holley or Weber carburetor to use
> the horse power in the four to six grand range. I use 330 degrees, half
> inch lift, 350 pound closed valve, six grand rev kit, Holley 850, 2 1/8
> Hookers : http://www.----------.com/pismo.htm Chevrolet of course.
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Drink wrote:
> >
> > Does anybody have the original camshaft specifications for the '76 CJ-7
258
> > 6 cylinder engine?
> > If I need to replace mine, what are good grinds to consider? Crane
makes
> > one for a 1000 RPM starting point that's made for fuel economy and
another
> > that produces a smooth idle but better performance in a little higher
RPM
> > range.
> > What are your preferences?
> > o_o_o_o
> > Best Regards, /| ,[_____],
> > Jim, WP3JQ |ŻŻŻL --O|||||||O-
> > ()_)Ż()_) ŻŻŻŻŻ )_)
> > EM60qk 30.447439N 086.628959W

 

The Cam Lobe Lift is 0.253, and the duration is 262° for both the Intake and
the Exhaust, with 34° overlap. Intake opens 9° BTDC, and closes 25° ATDC,
Exhaust opens 57° BTDC and closes 25° ATDC.





"Drink" <drink@gnt.net> wrote in message
news:c1r88v$4dp$1@news.utelfla.com...
> Does anybody have the original camshaft specifications for the '76 CJ-7
258
> 6 cylinder engine?
> If I need to replace mine, what are good grinds to consider? Crane makes
> one for a 1000 RPM starting point that's made for fuel economy and another
> that produces a smooth idle but better performance in a little higher RPM
> range.
> What are your preferences?
> o_o_o_o
> Best Regards, /| ,[_____],
> Jim, WP3JQ |ŻŻŻL --O|||||||O-
> ()_)Ż()_) ŻŻŻŻŻ )_)
> EM60qk 30.447439N 086.628959W
>
>

 

The Cam Lobe Lift is 0.253, and the duration is 262° for both the Intake and
the Exhaust, with 34° overlap. Intake opens 9° BTDC, and closes 25° ATDC,
Exhaust opens 57° BTDC and closes 25° ATDC.





"Drink" <drink@gnt.net> wrote in message
news:c1r88v$4dp$1@news.utelfla.com...
> Does anybody have the original camshaft specifications for the '76 CJ-7
258
> 6 cylinder engine?
> If I need to replace mine, what are good grinds to consider? Crane makes
> one for a 1000 RPM starting point that's made for fuel economy and another
> that produces a smooth idle but better performance in a little higher RPM
> range.
> What are your preferences?
> o_o_o_o
> Best Regards, /| ,[_____],
> Jim, WP3JQ |ŻŻŻL --O|||||||O-
> ()_)Ż()_) ŻŻŻŻŻ )_)
> EM60qk 30.447439N 086.628959W
>
>

 

The Cam Lobe Lift is 0.253, and the duration is 262° for both the Intake and
the Exhaust, with 34° overlap. Intake opens 9° BTDC, and closes 25° ATDC,
Exhaust opens 57° BTDC and closes 25° ATDC.





"Drink" <drink@gnt.net> wrote in message
news:c1r88v$4dp$1@news.utelfla.com...
> Does anybody have the original camshaft specifications for the '76 CJ-7
258
> 6 cylinder engine?
> If I need to replace mine, what are good grinds to consider? Crane makes
> one for a 1000 RPM starting point that's made for fuel economy and another
> that produces a smooth idle but better performance in a little higher RPM
> range.
> What are your preferences?
> o_o_o_o
> Best Regards, /| ,[_____],
> Jim, WP3JQ |ŻŻŻL --O|||||||O-
> ()_)Ż()_) ŻŻŻŻŻ )_)
> EM60qk 30.447439N 086.628959W
>
>