Originally Posted by SS_Firehawk

I just got back from the shop after about an hour and a half of tuning. And here is the verdict...

The M370 intake manifold made more power than the stock manifold from 2,000 rpm all the way to 7,000 rpm. After 7,000 rpm, it was neck and neck. I just sold that damn manifold too... Guess I'll be getting another one down the road.

What all this doesn't explain is how I lost 10whp and tq after a tune from 30 march till now. I'm thinking there is something else that's going on with this car. I'm not sure if it's the sensor, or spark plugs, or both. Posted below are the dyno graphs.

Keep in mind my tuned numbers are lower than my untuned numbers. It's a$$ backwards I know, I'm trying to figure out why.

1st graph is the stock manifold and the M370 (Blue is M370)
2nd graph is the same but displaying AFR's (Red is M370)

3rd graph is Stock tuned and stock untuned results (Blue is tuned, red is untuned)
4th graph is the same but showing AFR's (Blue is tuned, red is untuned)

5th graph is the M370 manifold tuned and untuned (Blue is tuned, red is untuned)
6th graph is the same but showing AFR's (Blue is tuned, red is untuned)