Where is everyone starting??

Denny McLain

You can have all the logs and dyno sheets ya want. Made it through college by sitting next to the smart kids so any answers you can throw my way is appreciated. Admittedly a bit bummed at the overall output compared to other similar modded cars and the lack of response from tuning attempts. Even been shopping Z06's and GT-R's trying to figure out what to do.

Spent 3.5 hours yesterday a Dynoject dyno with a bud whom tunes for a living seeing if there were any improvements in the Cobb tuning software and to reestablish a new baseline before adding 4.08 gears. Made quite a few little adjustments in mods adding an under drive pulley, opening up the grill/bumper so more air gets to the Gen 3 intake, oil cooler and wrapping the Gen 3 intake tubes for less heat soak and to lower intake temps, downloading the latest version of the Cobb tuning software into the ECU. The air temp was also 55 degrees which is a radical change from normal Dallas summer heat.

The car picked up 10 hp from the mods and appeared to respond to fuel/air tuning where it didn't prior. Fuel/Air tuning picked up 3-4 more hp with the car now at 330.3 and 262.2 std for an overall gain from baseline of 48.6 rwhp or 56.9 flywheel. Remember also, the car has had the kitchen sink thrown at it regarding mods with about every bolt-on available.

We tried to play with the timing and haven't had time to study the logs to see exactly what was going on but the car lost 2hp when we added 2 degrees timing and also lost 2 hp when we pulled 2 degrees out. The overall timing from the logs picked up two degrees on it's own but the car is still pulling out midrange timing which shows as a slight dip in the midrange curve. Going to fatten the car up a little more in the lower midrange to see if that is what it likes as cars are more prone to detonate around peak torque.

In getting a bit deeper into the software I'm am noticing some abnormalities such as the MAF voltage is different from left to right indicating uneven air distribution and obviously the phantom timing issues which are probably related to tables in the ECU.

What do ya need? It's all yours.