View Full Version : enginespec for GP9 for passenger service

September 23rd, 2011, 09:59 PM
I enjoy VMD's gp9s, but the enginespec correctly keeps these geeps under 55mph. Can someone recommend a comparable enginespec to permiit these beauties run/maintain passenger speeds? I think 70-80mph would be a good match. I am running 2010. TIA

Copied these ratios from an official gp9 operators manual.

Gear Ratios and Maximum Speeds:

65/12 55 MPH
62/15 65 MPH
61/16 71 MPH
60/17 77 MPH
59/18 83 MPH
58/19 89 MPH

September 23rd, 2011, 10:04 PM
F7, yes a F7. It should allow you to go at passenger train speeds with similar specs.

September 24th, 2011, 01:33 AM
I switched out to the tpr engine spec on mine.