Well I finally had time to get back on the dyno and play with my tune and the vain controllers on the Aerocharger variable vain turbos. My car is an '04 running FIC w/550cc injectors and twin T66 Aerocharger turbos.
For those that do not know the Aerocharger is a variable vain turbo and the early versions were used for the first time on an NSX by Bell Engineering. There are lots of threads in the Prime Forums going over the old Bell Design. I designed and built a twin turbo setup of my own loosely based on the old Bell kit but with the new large frame T66 Aerocharger turbos and my own WTA intercooler design. Someday I will have time to document it in a build thread but I really do not have time now but wanted to share the results of my testing as I know of a few guys that are considering the Aerochargers in their builds.
About 18 months ago I first tuned my system and while I was not 100% sure what the system could do I was very happy with the results of the first dyno sessions. I did plan on re-tuning the system after some road time and miles. I also wanted to be more aggressive as my original tune was extreemly conservative with AFR's during WOT set at 11.0 and pulling 1* of timing for every pound of boost added.
The first Dyno shows the difference between 8lbs of boost and the effect of changing the vain controller. The Vain controller effects how quickly the turbo spools. This run shows the controller at the slowest spool compared to the middle spooling rate. I can make them spool even quicker but that will be for another dyno session, right now I like the middle setting on the street and it is nice knowing I can go further if I need to. The other changes made to the tune were to raise AFR's from 11.0 to 11.6 and add 1* more timing at peak boost.
The next dyno shows shows a comparison of 8lbs and the medium setting for the vain controller and 6lbs using the same medium setting on the vain controller and the baseline pull prior to the TT install.
Finally I have a track day coming soon so this is my track tune compared to the baseline pull.
I plan to run 400whp on the track and the 440whp on the street, as a side note and some 35 pulls today the IAT's were rock solid at 109* with a single dyno fan blowing accros the heat exchanger and the engine radiator. We will see what happens at the track but I am happy with the results so far.
Dave
For those that do not know the Aerocharger is a variable vain turbo and the early versions were used for the first time on an NSX by Bell Engineering. There are lots of threads in the Prime Forums going over the old Bell Design. I designed and built a twin turbo setup of my own loosely based on the old Bell kit but with the new large frame T66 Aerocharger turbos and my own WTA intercooler design. Someday I will have time to document it in a build thread but I really do not have time now but wanted to share the results of my testing as I know of a few guys that are considering the Aerochargers in their builds.
About 18 months ago I first tuned my system and while I was not 100% sure what the system could do I was very happy with the results of the first dyno sessions. I did plan on re-tuning the system after some road time and miles. I also wanted to be more aggressive as my original tune was extreemly conservative with AFR's during WOT set at 11.0 and pulling 1* of timing for every pound of boost added.
The first Dyno shows the difference between 8lbs of boost and the effect of changing the vain controller. The Vain controller effects how quickly the turbo spools. This run shows the controller at the slowest spool compared to the middle spooling rate. I can make them spool even quicker but that will be for another dyno session, right now I like the middle setting on the street and it is nice knowing I can go further if I need to. The other changes made to the tune were to raise AFR's from 11.0 to 11.6 and add 1* more timing at peak boost.
The next dyno shows shows a comparison of 8lbs and the medium setting for the vain controller and 6lbs using the same medium setting on the vain controller and the baseline pull prior to the TT install.
Finally I have a track day coming soon so this is my track tune compared to the baseline pull.
I plan to run 400whp on the track and the 440whp on the street, as a side note and some 35 pulls today the IAT's were rock solid at 109* with a single dyno fan blowing accros the heat exchanger and the engine radiator. We will see what happens at the track but I am happy with the results so far.
Dave