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5.3 low end power

debo4x4

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debo4x4 Enthusiast

debo4x4

Posted
Posted

I lost a little low end pull and throttle response on my 01 Z71,5.3,3.73 when I got my flomasters put on and a little more with the 285's.  I want to get some back.  I've got a drop in K&N but was thinking of a FIPK kit, I've wanted one for a while.  Maybe a crank pully or HPPIII?  What do you guys think?  Thanks in advance.

Dihappy Enthusiast

Dihappy

Posted
Posted

Debo, most small mods will increase your power, but very slightly.

 

Ive read that the 360 elements such as the FIPK do decrease low end some.

 

I think the best would be a gear swap, but it isnt cheap,least for me it wasnt.

 

Go with some 4.10's or 4.56's in case you get bigger tires.

Guest

Guest

Posted
Posted

4.56s sound a lil drastic... You lost back pressure (duh...) with your new exhaust which does in fact result in loss of low end torque.. Id go with getting the FIPK simply because it will help and also help mileage... Pulleys are also something to consider... If you do decide to go with gears step up to 4.10s.

Stepside Z Senior Enthusiast

Stepside Z

Posted
Posted

I am very plaesed with my Gibson/FIPK combo. Plenty of power now and 320 miles on 3/4 of a tank. Pretty good considering I have had my foot in it.

Shaners Senior Enthusiast

Shaners

Posted
Posted

An FIPK and an underdrive pully would be a nice addition to your truck and would help restore some of your lost power.  If you do alot of idling, the underdrive pully may not be a good idea though...

 

These Vortech engines need back pressure from the exhaust to generate torque.  It's the nature of the beast.  The more you tow or haul the more you'll notice the loss of low end torque.

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