Originally Posted by
Spray-Cam Hell-Ram
Ok. Now you'll likely get a lot of different opinions on how to go about this but as far as I am concerned, 1/2 to 2/3 of that list is either not really necessary, or could be incorrect, depending on your preferences for idle, start-up, ect. For example, would you be looking for some cam chop at idle in park, or even when stationary in drive? If not, then sure, flatline first 4 columns to I'd say 14 from about the 400-450 air charge row and above only. Personally, I more or less have, from left to right, 14,15,16,17 degrees input for the first 4 columns from the 400mg air charge row and above. Then go back to the 400-450mg air charge rows and start removing timing as you work your way down to the very bottom left corner of the table/bottom row where ideally, you probably want to be around 5-6 degrees. Alot of people will tell you to add 10% airflow to your start-up airflow. But I'm not one of them. It's really not necessary, at least not for any cam installs that I've been a part of. Maybe it's needed for some of the cams out there that are way too big for the 5,7L hemi anyway, but my 228/238 .611/.602 113.5 LSA cam starts up right away and every time with a start-up airflow table like this, from left to right in lbs/min (5.50, 4.50, 4.00, .75, .65, 0, 0, 0, 0). Add airflow to the stock values if you so choose. You'll just have a start-up that is a bit louder than say a start-up using my inputs paired with lower airflow values in the 0.00, 0.02, 0.05, 0.1 area of the main throttle body airflow table (The first 4 inputs from the top). And sure, you can cut 5% from your VE in the idle area to lean out the idle a bit, but again, just preference and like everything else covered thus far, doing so or not should not make or break whether it starts up or not. If you have Comp Cam's 5761 phase limiter installed, there is no reason VVT should be disabled. If you have part 5760 installed (Phaser lock-out) then yes, disable VVT. If the Comp Cam's 5761 cam phaser limiter is installed correctly, and everything with the cam install and engine build is mechanically correct, it should start, whether VVT is disabled or not. You can max out torque delta and delta faults. For P2172, P2173, P2174 and P2175, I have input 100kpa, 100lh/hr, 100kpa, -100kpa respectively. Don't really know that these are max values or not, but they seem to work none-the-less. As for setting any negative values in the min spark table to 5 degrees. This will depend on whether you want an aggressive cam chop or not as I see. Personally, Ive got my cam choppin' ridiculously hard, so I can't say that I set all of my negative values to +5 degrees. If you don't care about the lope/chop, then yea, set the negatives to +5 degrees. And there seems to be a few methods to go about maximizing your cam's chop/lope. Personally, I have quite the opposite and have all kinds of negative timing values in my idle area of my minimum spark table. Thats just my preference. So, from 500 rpm through 900/1000 rpm (first 3 or 4 columns) and between air charges 150mg and 300mg, I have between -19 to -25 degrees timing in this little square/rectangle containing I believe 12 blocks in the idle area. And then as I work away from this area, my timing increases to positive values somewhat quickly to help keep my truck from wanting to shut off when coming out of the idle timing area of the minimum spark table. Setting your FA ratio to 12.0 AFR is also unnecessary. If you want to set your stoich in the fueling>General tab to .0720, as well as your Bank1 and Bank 2 Goal AFR tables in Fueling> Oxygen Sensors so that your commanded stoic is more like 13.5-14 instead of 14.7 I'd say that's probably ok. But 12.0 AFR is prob too much. Unless of course you're doing builds like Purple Ram where it may be optimal to run it "Pig Rich". These are just my opinions on how to handle a cam, but at the very least I know this works and is working well for me.
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