Old Jul 27, 2012 | 08:54 PM
  #579 (permalink)  
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GraphiteGhost
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Joined: Jul 2009
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From: Central South Carolina
Default Re: Project Crossfire - a Rotrex Supercharged Limited!

Originally Posted by Web 3.0
Ok, so I have managed to spend a few minutes here and a few minutes there. Mainly in the evenings after work as we have been making the 3-hour trip to see the mother in law every weekend for the past three weeks.

In that time I have made significant progress that has me VERY excited albeit somewhat at a deficit to my pride. Since I installed the Rotrex, it has never quite made the boost I expected to see in relation to the pulley I was using. I had checked basically EVERYTHING and never nailed it down. Well, I went ahead and bought the smallest pulley possible and bolted it on to see what that would do. The result was a few unexpected noises and a stream of air that could be felt from the seam between the compressor housing and the head unit. Something I never noticed before nor do I think (or hope) I could at idle with the larger pulley.

The rotrex uses a machine fit versus a rubber o-ring. Apparently mine was not machined right or it just didn't go back together right after I clocked it for the original fitment. I pulled it apart, applied some RTV, put her back together and let her dry over the weekend.

When I bolted it back up and made a run, I made 35 more RWHP at the same boost using my last tune in the same weather. The same boost threw me off because it felt hellaciously different. However, looking at the logs I noticed the throttle plate was only opening to 53%!!!!!!!

My reaction was WTF! , then Hell Yeah!

I tracked that back to my IC pump not coming on. Well, it looks like something might have burned out in my SRT ecu as I double checked everything and I simply can't get the signal required to trigger the relay and turn on the pump.

That is when I decided I was better off going back to the stock ECU and making that work. The only real hurdle in the way there was being able to use Star Das to change the settings I needed to avoid CELs and the dreaded face plant at part throttle due to the load limit reached BAS/ESP issue. I had tried that once before and ran into issues so I was not elated at the prospect.

DONE!

I had decided tonight to come home and see what I could do to settle that issue so I could revert back to the stock ECU next week. It took a few hours but I finally got it going and can now use Star Das on my NA ECU!!!!!!

That said, I should now have the tuning solution for the NA. A star Das and an AEM piggy back My plan is to work on it the second I get back to town. I'll first work on reversing the changes I made in order to run the srt ecu, get her running with my cruising tune, then start working her way up to full power.

This is awesome as I have reduced the complexity of this system once again by an exponential factor.

It is now down to the following:

AEM F/IC
Stare DAS
Injectors
Shift Solenoids
Rotrex
Single Plane Rotrex mount
a simple bracket and cable extension to relocate the cooling reservoir
New serpentine belt
IC pump and HE
Cold side plumbing with BOV
Tuning Aides - SPD, Wideband, and Knock Sensor

There is no reason this setup shouldn't make 325+ RWHP as long as the tranny can hold up. That said.
I don't want to get too excited because I don't have the dyno yet, but this is a well educated guess based on my last two years of experience with the car.

I am stoked to say the least!


WOW, simply WOW...
 
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