76 258 CJ-7 Camshaft specifications
 

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 |¯¯¯L --O|||||||O-
()_)¯()_) ¯¯¯¯¯ )_)
EM60qk 30.447439N 086.628959W

Re: 76 258 CJ-7 Camshaft specifications
 

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 nazis, 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 |¯¯¯L --O|||||||O-
> ()_)¯()_) ¯¯¯¯¯ )_)
> EM60qk 30.447439N 086.628959W

Re: 76 258 CJ-7 Camshaft specifications
 

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 nazis, 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 |¯¯¯L --O|||||||O-
> ()_)¯()_) ¯¯¯¯¯ )_)
> EM60qk 30.447439N 086.628959W

Re: 76 258 CJ-7 Camshaft specifications
 

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 nazis, 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 |¯¯¯L --O|||||||O-
> ()_)¯()_) ¯¯¯¯¯ )_)
> EM60qk 30.447439N 086.628959W

Re: 76 258 CJ-7 Camshaft specifications
 

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 |¯¯¯L --O|||||||O-
()_)¯()_) ¯¯¯¯¯ )_)
EM60qk 30.447439N 086.628959W
"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:40412F77.528B0D63@cox.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 nazis, 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 |¯¯¯L --O|||||||O-
> > ()_)¯()_) ¯¯¯¯¯ )_)
> > EM60qk 30.447439N 086.628959W

Re: 76 258 CJ-7 Camshaft specifications
 

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 |¯¯¯L --O|||||||O-
()_)¯()_) ¯¯¯¯¯ )_)
EM60qk 30.447439N 086.628959W
"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:40412F77.528B0D63@cox.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 nazis, 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 |¯¯¯L --O|||||||O-
> > ()_)¯()_) ¯¯¯¯¯ )_)
> > EM60qk 30.447439N 086.628959W

Re: 76 258 CJ-7 Camshaft specifications
 

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 |¯¯¯L --O|||||||O-
()_)¯()_) ¯¯¯¯¯ )_)
EM60qk 30.447439N 086.628959W
"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:40412F77.528B0D63@cox.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 nazis, 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 |¯¯¯L --O|||||||O-
> > ()_)¯()_) ¯¯¯¯¯ )_)
> > EM60qk 30.447439N 086.628959W

Re: 76 258 CJ-7 Camshaft specifications
 

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 |¯¯¯L --O|||||||O-
> ()_)¯()_) ¯¯¯¯¯ )_)
> EM60qk 30.447439N 086.628959W
>
>

Re: 76 258 CJ-7 Camshaft specifications
 

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 |¯¯¯L --O|||||||O-
> ()_)¯()_) ¯¯¯¯¯ )_)
> EM60qk 30.447439N 086.628959W
>
>

Re: 76 258 CJ-7 Camshaft specifications
 

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 |¯¯¯L --O|||||||O-
> ()_)¯()_) ¯¯¯¯¯ )_)
> EM60qk 30.447439N 086.628959W
>
>