How bad is your gas mileage?

[Moritz55]

Originally Posted by S1965C

Thank you, Mark. Surprised that with the two light springs your total timing is not all-in well before 4,000rpm. Agree that MSD caps and rotors are an annual maintenance item.

Thanks... I think Roush says RPM should be above 3500 or 3700rpm .. so I just run it around 4000rpm .. to assure Full Advance ...

[patrickt]

Originally Posted by Moritz55

Thanks... I think Roush says RPM should be above 3500 or 3700rpm .. so I just run it around 4000rpm .. to assure Full Advance ...

You want all the timing in by 3000 rpm, but you should check the total timing at 3500 rpm. Often times magnetic trigger distributors back up a degree or two by 3500 rpm. I don't know why, but they do -- it's just one of those things in life that is hard to figure out. Kind of like why Superman could stop bullets with his chest but would still duck down when the bad guy threw the empty gun at him.