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Comp Cam for my 4.0

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Old 08-07-2012, 02:43 PM
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Default Comp Cam for my 4.0

Rolled my Jeep a few weeks back, so I have a motor I can toy around with and mod as I see fit. I want to put this comp cam in the motor http://www.summitracing.com/parts/CCA-CL68-232-4 and my questions are as follows:

-It comes with new lifters, but will I need new valve springs, rocker arms, etc?

-Will I need to change from the stock fuel injectors?

-Will stock ignition be ok?

-Will the stock air intake and manifold/throttle body work with a new camshaft?

Forgive me if these are stupid inquiries, this is my first time really delving into internals on a motor before. Thanks in advance guys.
Old 08-07-2012, 03:01 PM
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Not stupid inquiries, but I don't have an answer either. I would call CompCams help line and ask them, after all, they are the ones who designed the cam.
Old 08-07-2012, 03:51 PM
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Comp has a camshaft for EFI 4.0s. I would suggest replacing the valve springs with any cam.
Old 08-07-2012, 06:47 PM
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Yeah, I found a Comp Cam on Summit that is for the 4.0 242 I6 that comes with hydraulic flat tappet lifters, then I'd just have to buy springs and retainers. I believe I can run everything else stock.

Last edited by CherokeeCountry; 08-07-2012 at 06:57 PM.
Old 08-07-2012, 08:35 PM
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Still leaves the question about the Injectors and Ignition. Any experts out there who can help?
Old 08-07-2012, 08:54 PM
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https://www.cherokeeforum.com/f59/pl...at-cam-123572/

Alot of reading but interesting might help
Old 08-07-2012, 10:39 PM
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Originally Posted by CherokeeCountry
Still leaves the question about the Injectors and Ignition. Any experts out there who can help?
Stock injectors and ignition is plenty. Injectors have what's called a Duty Cycle. Just because the injector says 19lbs/hr doesn't mean it operates at that. It may normally operate at 60% of that. My cam is custom ground (more duration to compensate for the bore size) and I use LT1 Chevy injectors with matching MAP.
Old 08-08-2012, 11:10 AM
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Thanks Outlaw, those were my few main concerns, and you covered 'em! Hopefully I get to do this soon.
Old 08-08-2012, 03:34 PM
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Originally Posted by CherokeeCountry
Still leaves the question about the Injectors and Ignition. Any experts out there who can help?
Injectors and ignition will be just fine.
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