The powerplant (pre-rebuild)

Click here to see the motor post rebuild

The motor had to come out for the shop to make a transmission repair (under warranty) and while It was out I added heetsheets and replaced the turbo with a K27-7200.

I later removed the heetsheets when I changed to a header style exhaust sytem as they no longer were positioned to provide any protection and the headers did not have the proximity problem of the stock exhaust.

I also had to pull the motor and get the top-end rebuilt after on eof my fuel pumps failed me(bad relay) while running the car on the track. The subsequent lean condition cuased detonation and premature wear to the rings.

When the motr was taken apart some irregularities were discovered with the Motor Meister rebuild that lead me to believe that they may not be the best source for motor service. Problems included th euse of irregular hardware to plug the air injectors on the heads, mismatched (though the same profile) cams, incorrect rings and a variety of other concerns

I chose to make some upgrades while rebuilding which include a more aggresive valve job (performed by Memphis Motorwerks) and reground cams (Web Cams).

For pictures of the motor in pieces click here

For pictures of the motor reassembled click here

As I am breaking the motor in there appears to be a measurable increase in performance.

I performed a simple test as I was upgrading my car to determine relative performance. The test was suggested by Stephen at Imagine Auto. I drive the car off throttle, in second gear at 3k rpms and measure the time it takes from application of full throttle to reach 6k rpms. This test can also be conducted from 2k rpms for a more exaggerated sense of lag and HP figures.

The 3-6k rpm test seems to have lost as much as 2 tenths dropping below 4 seconds on several of the runs. The 2-6k rpm run shows even larger gains dropping below 6 seconds. I have been forced to lower the setting on my boost controller to prevent spiking as the car comes onto boost much more quickly. I attribute this to the cams and the greater efficiency of the head/valves.

I wiil post video and Gtech results along with dyno numbers as they become available.

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