E40 2 bar Dyn Air dropping and so is fueling and everything else

[Highlander]

If you come up with an OS that works let me know.... I will be tuning an ls9 on a e40 with twin turbos.

[JezzaB]

Ive had two tunes on the same OS and one worked and the other didnt. Not fun on a LSX427 with 2x T04Z's. 903rwhp on pump, flash again and its lean or just breaking down as soon as it hits over 105kpa *grrrr*. Then another with a LQ9 403ci and a GTX4508R doing the same thing.

The tune I have in them now is 2 bar but it doesnt seem to be using the Boost VE table. So i have to be really naughty and use the PE to fudge it. And then make the timing the same from 0.60g/sec to 1.20+ so that it doesnt go say 10deg and then ramp back and pump in 32deg timing.

Not the way it should be done.

[GMPX]

I really hate to say this, but I have not been able to figure out why some cars behave like this and others don't. As JezzaB noted, you can run the same OS, same tune even and one car will be fine, one won't.

[Highlander]

Well... back at this again... same issue.. Car made 815whp but had a massive boost leak.. now that boost is corrected its even harder to tune now...

Is there a way to know when its working and when its not. This car, that in a point it started to work its not working anymore...

My guess: Please ross give it a check.

When you rescale to not hit the ve limit then the ECU for some reason resorts to the main ve table... I think i remember this car working ok when we were pushing lower boost levels... Since I am on pump gas right now and pushing less boost... i'll try and see if the unscaled table works with the 2bar and let you guys know.

[Highlander]

I tried scaling back down, but same issue... I can no longer get it to work. Could it be that any of the other custom patches is conflicting with the operation of the 2bar OS?

Is there any other option to run this other than the nameless?

Thanks

[Highlander]

Revisiting.. what would be the other way to tune this since the 2 bar stuff is not working? I would hate to use the other guys... but its starting to become the only option available for such a high HP car.

I am tuning this car tonight and I need some light on how to tackle this issue.

Is there a way to know w/o doing a pass if the OS is chasing properly?

Thank you.

[turbo_bu]

Back in the LT1Edit days, the original hack way was to use the 2 bar MAP sensor .... and not change the OS. We had no way to change it Thus, you end up with 1/2 the resolution on your VE table since now 50 kPa is really 100 kPa. Of course, 100 kPa is now really 200 kPa. It works, not pretty, but it definately works.

[Highlander]

Yeah... I tried that once or twice... Then reverted to MAF... Bigger MAF and be done with it...sadly... if i want to get this done today, this will be the only way... but oh well...

These ECUs are much faster than the LT1s so I guess it should work.

[Highlander]

Could it be that the scaler 2 was left stock???? I am going to do a quick test to see!

[Highlander]

First pass it worked... second pass/flash... reverted back to the stock table....