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Unread 05-06-2013, 08:32 PM   #1
Hbryant123
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1979 CJ7 
 
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Amc 304 Cam Question

Soon i am going to rebuild my amc 304, its gunna be a for light offroading and pulling my boat a few miles to the ramp, I was thinking of using a cam thats listed for torque, it said good for idle to 4500 rpms, will this cam cause terrible fuel mileage? is it worth my time??

http://www.ebay.com/itm/151025271117...84.m1423.l2649
thats it if anyone wants to check it out

Thanks!!

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Unread 05-06-2013, 09:00 PM   #2
swatson454
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What are you going to run for intake and exhaust?


Shawn
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Unread 05-06-2013, 09:06 PM   #3
Hbryant123
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Stock intake and exhaust, i have a holley 4 barrel that came with the jeep
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Unread 05-07-2013, 12:32 AM   #4
DYontheForum
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The stock intake is gonna restrict the amount of gain you are going to get from a cam.
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Unread 05-07-2013, 01:50 AM   #5
jumbojeepman
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I have a Crower Baja Beast camshaft that's for torque, along with a Edelbrock performer intake and carb, stock manifolds. I'm pretty happy with the end result, and my mileage isn't any worse than with the 2bbl carb and stock manifold and cam.
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Unread 05-07-2013, 07:48 AM   #6
swatson454
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Check out the difference between advertised duration, duration at .050 and lift on the ebay cam compared to this Lunati 250/256. The cam you linked appears to be a really old grind and the long advertised duration is going to cut into your mileage, manifold vacuum and low-speed torque pretty bad.

The newer cams hold the valve closed longer, open it quicker and further and get it closed again sooner. This will build more manifold vacuum and power for a given duration at .050 than any of the older style cams. I'm not a big fan of wider lobe separation angles but it will keep reversion at bay with restricted intakes and exhausts and deliver a little better mileage, especially when towing.

I'm guessing that the price is a factor but I really think you'll be much further ahead with a different cam and the one I linked would get my vote for your application.


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Unread 05-10-2013, 10:11 PM   #7
Hbryant123
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What would u recommend for a crank? should i replace the con rods and pistons??
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