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-   -   Idle Quality? (https://www.performancetrucks.net/forums/gm-engine-exhaust-performance-21/idle-quality-491423/)

osin68 Nov 2, 2011 09:56 PM

Idle Quality?
 
I am just wondering how smooth does this cam idle.
It is in a 6.0L Comp Cam 206-212 Duration @ .050 the lift is 515-522 on a 112 LSA.
Thanks

Mangled03gmc Nov 2, 2011 09:58 PM

Small cam for a 6.0 should idle nice and be drivable on a stock verter..

osin68 Nov 2, 2011 10:03 PM

Well it idles rough in my opinion! It idles rough in park but a little smoother in gear. but that is at 670 RPM in gear? Would anyone know how much more fuel should be added at idle?

GMCtrk Nov 2, 2011 10:06 PM

That cam is tiny it should idle like stock. I have a mid 220s in my 6.0 that you wouldn't even know it wasn't stock if it wasn't for the increased valvetrain and exhaust noise. Idle is at 650.

pwerlineman Nov 2, 2011 10:12 PM

is it the part number 54-408 i run this cam in my iron ls1 and it idles very smooth, drives well on stock verter. good 4x4 cam

dmelvin Nov 2, 2011 10:15 PM

I've got a bigger cam in my 5.3 that doesn't idle much different than stock (Idles at 680-720). The only thing that I see on yours that might give you a little lope is the 112 LSA.

Mangled03gmc Nov 2, 2011 10:24 PM

So your saying you have this cam in your truck already?? That is a small cam.. I guess you have not heard a hard idle cam in one before??

dmelvin Nov 2, 2011 10:35 PM

Here's an idle clip of my 5.3 with a 216/220-114LSA cam. Your's should idle smoother than this.
http://s155.photobucket.com/albums/s...-17-57_106.mp4

Granted, this was taken with my phone.. so don't expect great sound quality.

Atomic Nov 2, 2011 11:16 PM


Originally Posted by osin68 (Post 4804308)
Well it idles rough in my opinion! It idles rough in park but a little smoother in gear. but that is at 670 RPM in gear? Would anyone know how much more fuel should be added at idle?

That is something your tuner needs to adjust, a straight answer will not suffice without seeing a log of it running. Also, ignition advance plays a big part in idle quality.

Bama2door Nov 2, 2011 11:33 PM


Originally Posted by Atomic (Post 4804356)
That is something your tuner needs to adjust, a straight answer will not suffice without seeing a log of it running. Also, ignition advance plays a big part in idle quality.

This guy has no clue what he's talking about...





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