What idle speed to set this cam at?
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iTrader: (25)
Joined: Dec 2004
Posts: 2,554
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From: Kannapolis, NC
What idle speed to set this cam at? The specs are 257/266 648/622 110lsa straight up
427 LS7
L76 intake w/NW tb and 39lb injectors
M6 with Tex and 4.10's
L92's ported
98 TA
I was hoping that I could get the thing to idle around 800 or lower. I figured you guys have seen what the bigger cams like and would be able to give me a good reference point to start at. Thanks for the help.
427 LS7
L76 intake w/NW tb and 39lb injectors
M6 with Tex and 4.10's
L92's ported
98 TA
I was hoping that I could get the thing to idle around 800 or lower. I figured you guys have seen what the bigger cams like and would be able to give me a good reference point to start at. Thanks for the help.
Start tuning a big cam for a higher idle, then work your way down until you find your minimum acceptable idle speed (lope, etc.). I'm guessing you will really have to dial in the tune for much less than 800 rpm. There are probably only a handful of people in the country who have actually tuned a L76/L92 combo, so you are delving into an area that you won't find much help with.
word, when starting a new tune with some uncharted territory and a big cam, shoot for a high idle at first to get it running, then drop it down bit by bit until youre happy with it. I hate to throw numbers out there, but start as high as 1200 if you want. Get it running, give it some time to learn some trims, and then start dropping tune by tune.
many of the full tuning solutions allow you to set idle and timing and such while its running, so you can play with it.
many of the full tuning solutions allow you to set idle and timing and such while its running, so you can play with it.
TECH Enthusiast
Joined: Sep 2004
Posts: 564
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From: Omaha, NE
I would be surprised if you can get a good idle under approx 1000 RPM with that healthy of a cam. Most cam/cubed combos that I have run like that had a 1100 RPM sweet spot. Also, if you are using closed loop at idle, you need to select an RPM high enough to keep those O2s hot enough. You're fortunate that you are not running an auto with a tight stall.
