Originally Posted by Maximo

OS 25 on a 086/shrt manifold....... should be good for at least 60 MPH......I found gearing up the DM-1 made the car even more sluggish and actually hurt top end...gearing down seems to allow the engine to spool better and reach higher speeds and RPM as well...IMO the DM-1 is over geared, especially for a .21... My mod JPX hit 62 MPH in 300', my mod Picco 28 hit 68 MPH in 300'....The 28 could pull more but we couldn't keep the car straight enough to make a full run....... even at 62 MPH we had issues with air getting under the body and causing the car to flip over backwards....