Hey all,
How much timing is to much and how do you tell where your at with it.

I am running TST stacked with Flashpaq, seems to run pretty good but I know both of these control timing. (TST on 4/5) (Flashpaq on perf) I don't mind running a little on the edge but not crazy like a few of you guys.

Also, what happens with to much timing?

One more thing, I hear about high fuel rail pressures of 3000+, what boxes do this so one can avoid these high pressures, and how on earth do you monitor pressures that high? Is there gauges that go that high and do people run them so as to monitor the rail?

Hope everyone is having a nice holiday weekend,

Lance

 

I have experimented with this issue since getting the TST user timing feature program. I feel certain the GO/NO GO is about 15*-18*. It appears that most of the hotter DLers are loaded to either 12* - 15* as I can add only 3* in timing from the TST before getting injection rattle. To me, that is the sweet spot. Basically you back into the number you're looking for this way.

 

It will start rattling when you have too much timing. When my truck is cold I have to turn the TST off because it gives me too much timing. Once the truck warms up I'm OK. I tried the TST/Quad race combo and it was rattling at idle. It was undriveable with that much timing.....
There is a rail pressure guage you can buy now. The pressures, however, are closer to 30,000 psi, not 3000!!

 

The amount of timing is totally dependent on your fueling and air flow. I can run 18 degrees on my TST....auto adjust and the Smarty with timing (another 12 degrees) and I get no rattle....but then again I did blow my headgasket....the more timing the more your cylinder pressures go up. On the 2nd gens with 24v the max timing is about 25degrees constant. ks

 

I have run 21 degrees with no issues other than noise.

When you start advancing the timing over about 16 degrees the pilot injection starts to loose its value and that is where most of the noise comes into play.

I think the only time a lot of timing would really hurt anything is if you were making a whole lot of boost to go with it. I think on a stock truck you could run wide open with 21-25degrees with no issues. Now if you start pouring the coal to it then that is another can of worms.

 

So...is it a concensus that Smarty is 12 degrees max? (varies or constant?)

and the TST can be 18 degrees max? (varies or constant...and what about the adjustable timing settings?).

I am trying to dial my timing in now...

 

The Smarty varies timing but it is aggressive in its use. The TST twins on auto timing isn't very aggressive but you get 18 degrees at WOT above 2500rpm. My truck will stall out with manual timing 18 degrees on the tst below 1200rpm. Smarty and TST with a fixed 3 degrees of timing is a nice daily ride... Helps with the smoke on spool up. For racing Smarty and TST 6 or 9 manual is probably the best or maybe 12 auto control. ks

 

Why can't I get these answers direct from the source sooner?

I was thinking Smarty timing plus 3-6 fixed on the TST would be the bomb.

Better mileage down low...and slightly more timing than the TST up top to not pop head gaskets.

abc4yew...PM me with the source of this timing ifo...if you don't mind.

 

I believe the TST on AUTO will limit timing advance to 12 degrees based on RPM and boost. The SET mode can allow timing advance up to 18 degrees which is -not- based on RPM or boost. This can be a BOMB. SET mode is something to stay away from if stacking.

I agree 100% with qzilla here and this is totally consistent with my observations. Re-read his comment and hopefully he will elaborate more as I am sure he can say more about this subject.

Chris

 

So is stacking really necessary or should I say a necessary evil??

II told me to go ahead and stack the TST with the Flashpaq but as much as I love the power it makes me really nervous.

Maybe I should just use the TST, and bag the Flashpaq?

I guess the question would be if I wanted to stack with the TST, what would you guys recommend as a safe # on TST with which downloader?

Thanks and yes I realize I put 3000 on rail pressure -------lost a 0 in there somewhere.

 

What is wrong with set on 3 or 6 degrees?

Why does TST raise timing with boost if that is bad?

I wish there was more finite info...cylinder pressure info????