Kevin

If you set the actuators at sane settings and if your ECU has enough fuel dialed in you will be okay.

Michigan 996TT

Kevin:
What's the scoop on adjusting the rods? I was told to set them at 9 psi and also 11psi ? Then someone else said 3 full turns in from where they sit in the housing?

Kevin

What do you have for hardware.. Stock 24's???

The factory setting is measured at 7-7.5 PSI.. If you are starting with new turbochargers, mark the adjusting nuts and rotate/turn 2-3 rounds clockwise. And see what you have..

You can and only will pickup a tenth of a bar with the adjusting. If you need more you have to either adjust your ECU tuning or install the wastegate kit.

Keep in mind that while you can preload the stock actuator, past 1bar it just isn't strong enough to hold the wastegate door shut against the exhaust pressure built up on the backside of the gate.

Michigan 996TT

Thanks Kevin:
What did you mean by mark the adjusting nuts?
Is it from where they were stock? or mark them where they sit in the housing?
I hope its the later because I already have them cranked in 3/4 of the way, which I guess I need to change?

Kevin

You have to mark the nuts because you need to clock or remember the rotations. It does have to be exact, or you risk damage on one turbocharger due to shaft overspeeding. You just can't crank each set of actuators in random turns. Again if you mark each nut at 12 o'clock, count each turn. One turn equals 1mm.

0396

Kevin,

Thanks for the continual education.

Michigan 996TT

Kevin Thanks again:
The rod is only sticking out of the end nut 2-3 mm ? Is this correct

Kevin

Please remember that these turbochargers are sync'd together. At the KKK factory they are adjusted to a common reference point. If you lose it, or tamper with the adjustment without making a reference mark you will then need to look at the factory proceedures for getting them sync'd..

Kevin

I have promised a few people that I would explain the wastegate adjustment..
We want to measure from the end of the rod to the forward nut. To get to this one has to remove the stainless steel clip that contains both nuts and the wastegate lever arm.

The object is to increase the wastegate seat pressure, the only way that we can do this is by shortening the actuator rod. So we need to tighten the gate or adjust the nuts clockwise. I mention clockwise when we are standing at the rear bumper looking forward.

The first picture shows a typical stock measurement of the actuator.



Please forgive the quality of the pics, my flash will wash out the readings.

This picture shows the measurement after a few turns clockwise. I must strongly recommend that one mark both nuts at the twelve o'clock position so that you can turn them (clockwise) and retain the proper sync between each turbocharger.



If your turbocharger measurement read 28 or 29mm you can bring them up to 31mm with nice results.. This will fatten up your lower midrange "pull"

Please NOTE-- This proceedure is not intended to turn a stock ECU into a 1 bar tuned ECU. It won't happen.. Your ECU will fight the adjustment and dump all of your boost. It's smarter than the adjustment!! In the end you will be making less power.. All the ECU has to do is lower timing if it figures that boost isn't being dropped..

Zippy

Hey Kevin. This post caught my eye. Could you please elaborate on the interaction between the MAF and the ECUs boost mapping?

Thanks, Mike

Kevin

Mike if your MAF has been subjected to a oiled air filter, the MAF resolution is greatly impaired. This has a direct effect on the ECU's load calculations. Maximum boost will be limited. Temperature also has a direct effect.

Michigan 996TT

Kevin;
Thanks for the help with this as well as all the other issues, that you help us out with.

Zippy

So I think what your saying is the MAF will read less airflow, because it's dirty, and the ECU will not provide the boost because it doesn't recognize the car is under 100% load?

Jean

Great post Kevin, thanks. Nothing like the good old "1 Bar" wastegate spring method, ala 930

markski

I had Kevins stage 5 turbos with the billet actuators shown... simply amazing...