Plenty of fuel to new 7000 rpm redline, old was 6000. I have the software now and can program myself. Still working with the tuner to get my E85 starting issues resolved. I've asked for a burner for Christmas so I can change chips myself. I can't believe the stock computer has so much adjustability. So far found you can raise the limiter up to 14432 rpm, can adjust cranking fuel per temperture, this is injector pulsewidth and duration. You can adjust fuel cut and modify MAF and fuel tables. Different year computers also have different circuits which new ones tend to have more adjustability.