Timing adjustments

Midevil1 · Post by **Midevil1** » Wed Jul 09, 2008 9:53 am

Getting your vehicle as lean as possible without torching a piston has been the general rule for making maximum power. Unless you are on a dyno or at the dragstrip, playing with your timing is going to be a guessing game. If you want maximum low end torque, put an adjustable timing chain in your motor and degree your cam for the low end torque you want it to make.(retard torque, advance HP) A little tougher to do, but better then the path you are taking right now.

rickssz · Post by **rickssz** » Wed Jul 09, 2008 5:45 pm

Thanks for the feed back. I think Ill try retarding at 1 to 1.8 and maybe a little at 2 to 4k a for a torque bump and keep 4 to 7k a little advanced for HP. Ill try leaning out a little at lower RPM too and probably richer the top end a tad.

rickssz · Post by **rickssz** » Fri Jul 11, 2008 8:41 pm

Its confusing me. Another post said to decrease timing in the bottom 2 ranges to get max torque out of the hole.

Post by **06MonteSS** » Fri Jul 11, 2008 8:52 pm

what post?

rickssz · Post by **rickssz** » Fri Jul 11, 2008 9:32 pm

BoostFrenzy wrote:regarding timing, there's only one "right" curve and while the predator's adjustments seem to be offsets in ranges rather than absolute numbers you can dial in per rpm, this is how i'd approach it...

first you need to understand MBT (maximum brake torque), often referred to as maximum best timing, this is the "right" amount of timing that will produce the most power... and adding in more isn't going to make any more power, you'll just get closer to detonation and have no ceiling for changing atmospheric conditions / fuel quality

so if it's "off the line" power you want, i'd try adding in a little timing in the lower 2 ranges and see how it reflects your 60' times after SEVERAL passes, while also logging KR, beyond that, if you're trying to tune the entire timing curve there's always been two schools of thought here... richer afr's with more timing or leaner with less timing, not sure which makes the power in our cars though because I've never tuned one (yet)

It's really a guessing game without having a dyno to see where MBT is at each rpm, but i'd have to believe adding in a degree or two can't hurt

This one.

CANUCKPREDATOR · Post by **CANUCKPREDATOR** » Sat Jul 12, 2008 1:01 am

rickssz wrote:
BoostFrenzy wrote:regarding timing, there's only one "right" curve

It's really a guessing game without having a dyno to see where MBT is at each rpm
This one.

These are the two big things to take out of this post. The ONE right curve is for your vehicle. What works in mine, may not work in yours, there is such a fine line on these computer controlled vehicles. The other thing is a dyno is REALLY needed to see what YOUR vehicle needs and how it responds to the changes. We can give you tons of advice but with out seeing the actual results on a dyno none of this advice means anything.

Basically, play with timing, if you want. Get to a dyno to REALLY make good changes.

rickssz · Post by **rickssz** » Sat Jul 12, 2008 2:21 pm

I bought the predator so I wouldnt have to pay for a dyno tune. I dont have a good dyno within a couple a few hundred miles and even so wouldnt pay dyno time everytime I changed or adjusted something. I will eventually get some dyno numbers to use as a baseline when I am satisfied with my adjustments or get a custom tune from DS.