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Low end torque 5.7 quad cab


This is a discussion on Low end torque 5.7 quad cab within the Engine & Performance forums, part of the 3rd Gen : 2002 - 2008 category!
I have a good list of bolt-ons (LTH, Magnaflow exhaust, free flow cats, y - pipe, 87mm throttle body, 4.56 ...


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Old 01-09-2017, 08:54 PM   #1 (permalink)
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Default Low end torque 5.7 quad cab
I have a good list of bolt-ons (LTH, Magnaflow exhaust, free flow cats, y - pipe, 87mm throttle body, 4.56 rear gears, custom hemifever tune, cold air intake) but I'm lacking low end torque. I think the Magnaflow cans and y-pipe might be letting too much air out, not enough back pressure. I mainly use my truck for city driving but I need more low end power, truck feels dead below 3k, barely moves unless I really step on it...Any suggestions on mods that will improve low end engine response?

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Old 01-10-2017, 08:37 AM   #2 (permalink)
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You need a cam. One that is designed for more torque then topend. I used to have a Comp Cam that was a torque monster. I could definitely feel the torque increase and was way fun around town. Not to mention it would lope hard af . You could hit up Jay Greene for a custom grind or go out and get the cam I had directly from Comp Cam.
This is a video of my truck with that cam. Doesn't do it any justice but you can definitely here the lope when the cutouts are open in this video.
https://youtu.be/7yTlfJC1hZk

This is the cam card on that torquey cam, it was a 210x cam by KRC


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Old 01-10-2017, 09:13 AM   #3 (permalink)
 
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A good cam will do it.

Or, you could put a reducer in your exhaust at the inlet of each muffler.


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Old 01-10-2017, 09:25 AM   #4 (permalink)
 
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Get a decent cam and a 3000 stall torque converter, you wont be able to take the smile off your face


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Old 01-10-2017, 09:39 AM   #5 (permalink)
 
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How much work goes into new cams? On the hemi, are you buying 4 new camshafts? Pulling the front end off the engine?


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Old 01-10-2017, 10:02 AM   #6 (permalink)
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Thanks for all the feedback guys! Looks like I'm going to be in the market for a cam, I recently had my trans rebuilt and don't want to make any major changes (TQ) until I need to. Does switching cams have any long term negative effects on the block, any need to replace lifters or springs to 6.3 version?

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Old 01-10-2017, 10:03 AM   #7 (permalink)
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It is one cam for the hemi. Whole front end of the engine comes off. Springs on the heads will need to be replaced as well, welp I guess that could depend on the cam. Pushrods will need to be replaced.


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Old 01-10-2017, 01:22 PM   #8 (permalink)
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Damn sounds intense, don't think I could do that myself. Any idea what a shop would charge for the work? Where can I buy springs and rods? Does anyone have dyno results pre-post cam?

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Old 01-10-2017, 01:57 PM   #9 (permalink)
 
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I would put a higher stall tq converter in there before looking into a bigger cam. There is no question that a proper cam will make more tq, but it will not show as much of a gain in off the line power as a 2800-3000 stall tq converter.
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Old 01-10-2017, 08:05 PM   #10 (permalink)
 
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I'm with Matt on the stall first. it would be cheaper and easier to install also

tuned by Jay Greene
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