Yeti wrote:
mass-hole wrote:
We are certainly close to being able to make a damos.
Can you also see the output frequency to the turbo actuator on your scan tool? I have been trying to find where the frequency is controlled from within the tune but have not had any luck. I would like to be able to switch to a Hella Electronic actuator from the GTB turbos like GDE did with their turbo kit. When DieselGuy86 releases his upgraded turbo center section I think this would be a great add on. The only thing holding me back is making the switch to 140hz. Right now I see 152.6 Hz using a scope but I am wondering if the scan tool shows something different.
There is a map at 0E3330 in the 808 tune which is a "calibration" map for the Vacuum boost controller. What it does is takes the % output of the VNT Control maps and alters it to reflect the non linear behavior of the vacuum actuator. If you actually put a scope meter on the vacuum wires, you will see the output is 65% despite the VNT maps asking for 85%. If you look at the E3330 map, it converts 85% to 65%. When converting to a Hella Electronic actuator, we can just make this map a 1:1 ratio where 30%=30% and 85%=85% since you no longer have the vacuum system. I tried this on mine and the duty cycle at the wires did go from 65% to 85%.
I thought that the 00066 just prior to this map may have been the control for the frequency since 152.6 Hz is a 6.55 millisecond pulsewidth but when I changed it to 00071 the frequency did not change to 140hz.
There are two other calibration maps that seem similar at 0E63B8 and 0FB468. I am not sure what they do but I think one may be for the gas pedal. All of them have a 00066 directly in front of them.
real difficult to respond i have compared the 808 with an 615 with different vgt and turbo map and the map at 0e3330 is different , but sincerelly I have not understand how they convert , the other at 0E63B8 seem say at 8192 =100% ...........right ? the other at 0FB468 .....sem close to the first , but I do not understand it ..........need more time , but probably you are near the true ...........but if you want more turbo ............why you do not modify your original and put longer vanes on cold side , you can reach more boost at same speed and they not cost like a new turbo , probably you gain 0,2 bar at same turbo speed
Yes you are correct, 0E63B8 has 100%(8192)=100%, but it changes lower down to 90%(7373)=70%, 80%(6554)=60% I dont know what that 8192, 7373, and 6554 represents though, possibly gas pedal duty cycle or something similar.
The map at 0E3330 only has 0-95% on the axis, 7782/8192 = .95. I believe this is because on the Hella electric actuators, the maximum duty cycle is 95% and once you exceed that it goes into safe mode and full opens the vanes. There are several place in the tune that seem to suggest they only allow 5-95% output. The axis values correspond to the values in the VNT control map(0F5CE8), the values in the map are the output values. So in the case of the 808 file, if the VNT map request 85%(6963) then this table changes the actual PWM duty cycle that is sent to the Vacuum solenoid to 65%. If you measure at the vacuum solenoid with the key on, engine off you will see a 65% duty cycle.
I am looking to boost power by quite a bit. DieselGuy is essentially modding the stock turbo. He is going to make a custom center housing with ceramic ball bearings, a new bigger turbine from the GTB2056V and hopefully he can do a 60mm compressor. I am hoping i can get close to 3 bar.