Since it is very hard to find pictures of anyone actually doing it, below is my installation of the .73AR T25-EWG-44 exhaust housing on a GT2871R, which allows for the use of a 44mm Tial wastegate.
Impressions:
The installation of the T25-EWG-44 did not allow enough space to mount the Tial MV-R waste gate directly on the turbo housing, so my mechanic fabricated a 90 degree elbow (like what ATP sells) to mount the Tail vertically below the brake master cylinder. He then custom fabricated a dump tube down inbetween the bell housing and firewall. Overall the installation turned out very clean. The Greddy tubular exhaust manifold with 4 coats of ceramic coating turned out fantastic. It is a very stout manifold compared to everything else I have seen.
Driving impresson? Man that waste gate dump tube is obnoxiously loud
So far I haven't been able to get an Enthalpy tune that will work on the car. It runs rich at idle (11.5-12:1 AFR), no load going through the gears 14.7:1, on boost around 13.4:1 range, which means I have to be disciplined to stay out of boost. I am installing a new Aeromotive 340lph Stealth pump tomorrow and a 60 amp relay direct to the trunk/hatch mounted Odyssey PC925 battery. It appears to be more laggy than the previous .64AR setup, but I think it is possibly because it is slightly lean and not getting enough fuel to spool to full boost in the 3.5K RPM-4K RPM range (It won’t hit full boost until 4K, which is too late). I also suspect that maybe the 1.1Bar waste gate spring is too high and I should lower it, which would let my boost controller to more of the work.
Since I have had trouble getting a ROM tune to work, I have been thinking that I will have to either go with an AEM EMS Series 2 standalone or an Apexi Power FC D-Jetro. Several pro-am drifters locally have had issues with the EMS rev lifter causing displaced rocker arms or shims, when it has never happened with a Power FC. Thus, my mechanic is currently suggesting that the Power FC is a good option. I will be doing whatever it takes to tune the car will be tuned properly, within the next week or two max.
03-18-2012, 06:31 PM
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