98Camarod

iTrader: (43)

I decided this would be the best place to post this, I have 15 degrees commanded for everything over .61 g/cyl over 2800 rpm. I' running off the WG spring and have seen as much as 8.5 psi. I haven't seen any KR.

I know I'm leaving power on the table, I just want it to be safe. My question is, is there a ball park "safe" timing to run for X amount of boost, also consider I'm running 241 heads. I'm sure I can run a few more degrees above 2800 to atleast 4500 rpm. Like I said, I'm just trying to get a ball park figure so I don't screw anything up.

I could ask this another way. When should you have your lowest amount of timing applied, the highest, and the intermediate ranges of timing that slowly decrease to the lowest amount of timing.

calongo_SS

iTrader: (7)

I wouldn't go higher than you're at with straight pump swill and 10:1 compression. I'm running 18 with meth and 10 psi, and I feel I'm pushing the upper limit of "safe".
If you're just starting to tune it I would start out with 10 degrees or so until the a/f is spot on and work on the ignition advance from there.

cablebandit

iTrader: (37)

i run 15 for track/street as well. Its not worth the risking if you arent competitively racing. i go down to 13 at peak torq and then back to 15 after that in the upper rpms.

98Camarod

iTrader: (43)

AFR is exactly as commanded, and at part throttle and ilde its at stoich. My thing is, where I have the timing at is costing me power, I was wondering how everyone implemented the timing. I'm sure the way I have it isn't right, but it works. I can add a few degrees under a certain rpm, just not sure where to go with it.

I'm going to add a few degrees under 4500 until I get KR or meet my N/A timing values which ever is first. Even N/A, I had 23 degrees, I know it will not be that much. I have a meth kit, but I'm an idiot and bought the wrong one. I'm waiting to hear back from snow performance, and see if they will let me trade out my controllers. The one I have is for a MAF set up.

98Camarod

iTrader: (43)

So you do it the same way, so there is a giant box that is 15 degrees in the lower right of the timing table?

Mine is 15 from .61 g/cyl 2800rpm all the way to the bottom right of the table.

cablebandit

iTrader: (37)

i have speed density but yes basically like you just said.

98Camarod

iTrader: (43)

So do I, 2 bar SD. I figured more timing would be able to be added in the lower parts of boost, rather than having everything the same.

calongo_SS

iTrader: (7)

My timing table looks the same as what you are describing. Really, in lower RPM's (peak tq) you want less timing, you can get away with a little more at peak HP. I have it flat above a certain point for simplicities sake.

Johnv

Not familiar with HPT but if your using EFI Live 2 bar COS, you can leave timing pretty much the same as N/A, maybe a little lower from 2400 rpm up in the 1.20 gms/cyl columb, then use the boost timing table to progressivly pull timing as the boost increases.

98Camarod

iTrader: (43)

Unfortunately mine doesn't have a boost timing table. The only thing I see that I could do to leave the timing the same as n/a is to utilize the AFR Correction and use negative numbers. I'm a simple guy, and that looks like it is anything but that.