As promised, here are pics and vids of the dyno adventure.

It was a long day, but a successful one. Once we finally were able to try to run the engine it pretty much started up instantly – Brian (the guy running the dyno) jumped in surprise. I don’t think that happens often. Every pull was strong, and we got a great tune out of it by the end of the day. This program was then copied over to my PCM so the engine is ready to rock. 623.8HP @  6200, 572.8ft-lbs @ 5100. The engine has loads of torque and never goes below 500ft-lbs from 4000 through 6400rpms. It’s average torque from 4400-6400rpm was 555.8.

When we got to Hitech Motorsports we had to drain the oil out and change the windage tray from the LS2 version to a newer LS7 version. Brian informed us that the longer pistons may hit the ribs on the LS2 windage tray, so we swapped that out. After getting the engine mounted in the dyno one of the main power cables on the dyno shorted. It could have ended up very bad, but luckily Brian was able to fix it and get us running.  This motor was previously a dry-sump configuration, so we had to take off the valve covers to fill it with oil (afterwards Hitech traded me my valve cover without an oil fill port for one that does).  This wasn’t a pain since we had to take off the intake manifold to rotate it back to its normal configuration anyways due to the engine dyno not being compatible with a rear facing intake manifold. Minor drama, long day, very successful. It is comforting to know that this engine will run great once the time comes. GREAT work, Erik. 

Once we finally got back to the garage we ate some great stew my wife made Erik and I, unloaded the engine, installed the motor mounts, put on the clutch pressure plate and flywheel, and got it set in. Finally! Thanks for the help, Josh!

Videos:
619hp/572ft-lb: http://www.youtube.com/watch?v=p5R85J2MoiI 

624hp/572ft-lb: http://www.youtube.com/watch?v=-aI84UrTeKs

Too tired to type much – long long day today. Got the engine tuned on the engine dyno and it put out 624hp, and 572ft-lbs. Will update with pics and vid later.

Engine gets tested, dyno’d, and tuned tomorrow.

Finished wiring up the AC connections (B+ and a few grounds). Afterwards I removed the zip ties holding the front end wire looms to the frame and fastened them into place with some retainer clips.

Tonight I prepped the engine harness for installation. Since the intake manifold is backwards on the GTM the donor harness has to be stripped down a bit and some plugs need to be ‘freed’ from the harness so they can reach over to the new sensor locations. In a nutshell, each bank of injector plugs need to be stripped out and the other plugs that are bundled with them need to be retaped separately. This was a mindless task that allowed me to catch up on re-runs of Raymond, King of the Hill, and Malcolm in the Middle while I worked.

Got some engine pics from Erik today – the rebuild is going as planned and we are looking at possibly getting it on the engine dyno for testing and tuning next Friday.

To accommodate the duct hosing from the evaporator, holes need to be cut into the top panel of the footbox. I made a cardboard template of the aluminum panel first, then used it to cut out the holes freehand with the Dremel. Afterwards I smoothed the edges down – I will pick up some serrated grommeting and line the edges of the holes as well.