Problem Roush 427IR on the way to Roush

[Got the Bug]

Originally Posted by ekrupa2

Two...with my 402 SR I have seen 11-14 MPG...never any better. 20-22MPG sounds great but seems out of the norm. Doug - what do you see for MPG?

Best case, I've eeked out 13 mpg. Two has FI, so he should do better than that.

[twobjshelbys]

1. Key is that the altitude portion wasn't right. All the suggestions of sending it to this place and that place wouldn't have resulted in any different response than I got when I sent it to Livonia - Looks great here. All of the adjustments that were done were to the altitude table, and the info I got yesterday was that they would focus there [before I had volunteered that I had already done that]. So we were both on the same page. My belief is that those with Roush IR engines would have the same issues as I if they tried to be aggressive with it at Denver or higher. Typical street driving wouldn't show it (as I was quite happy that way). But you'd never run a quarter mile at Bandimere.

2. I filled this evening since I'm hitting the road at 4:00 tomorrow. I logged 220 miles at 13.6MPG. 14.2 before that. I guess that ain't so bad. Before that I had a 18.9 and 17.1 and 22.0.