Here you can see how the inside of the bumper cover opening was widened to fit the tubing.
After a few short pulls on the dyno to check the air/fuel, Gonyon let it rip. The turbo spooled up and whistled sweetly, then the wastegate opened and let us know we were at full boost. When the dyno run was over, the mule turned out 398 hp and 458 lb-ft of torque at the wheels. The air/fuel ratio looked a little on the lean side, so Gonyon added some fuel at the top end and power picked up to 421 hp and 465 lb-ft of torque. Total timing checked in at a rather safe 19 degrees, and all runs were made while sucking down 93-octane gasoline from the local BP station.
During our two pulls, we noticed that there was a slight misfire at the top of the rpm range, as you can see the in the dyno graph (pg. 104). We think this is a coil and/or distributor problem, and will have to look into it before we do any more performance improvement upgrades.
Since our stock mass airflow meter was both maxed out and non-compatible with the blow-thr
Worse than that is the fact that we have a head gasket issue with the engine again. During the engine buildup that we did last month, we ran into head gasket issues while performing dyno pulls on the normally aspirated combination. Just like then, we seem to be venting combustion into the coolant passage, which pressurizes the coolant. The problem is likely a warped deck, but we'll let you know.
After talking it over with various figures in the industry, our best option is to pull the engine and tear down the block to have the deck surface milled flat, and to have the heads checked for straightness just to be safe. We've encountered this problem when the engine was still in its original Mustang GT, and twice now that it has been between the fenders of our Recession Special notchback. Pulling the motor back down is a lot of work, but we'll save some coin by doing the majority of the labor ourselves.
We were so stoked to finally have this turbo project together, and driving it out on the street is really sweet. The car runs smooth as can be, pulls hard until it smokes the hides, and is only loud when you stand on it and the wastegate opens up. We may reroute that back to the downpipe upon reassembly just to keep the stealth factor. You can even lug the engine comfortably at 1,300 rpm with its 2.73:1 gears, and it's great to drive. Hopefully, we can get it back up and running soon.
|The Cost Of Tire-Smoking Fun|
|B&G Stage One Turbo System||$2,750 plus shipping|
|Brothers Performance Fuel upgrades||$369 plus tax|
|Granatelli Motorsports MAF||$245|
|Ford Racing Parts Injectors||$415|
|HP Performance Tuning and Chip||$650|
|Turbosmart eBoost2 Boost Controller||$470|
|Gauge Pod from Summit Racing||$25|