Collected my car from the garage today, after having the Pertronix automatic ignition fitted, drives like a dream now. The kids came along too.
Good job,Passed inspection with no non conformance or flaw whatsoever.
Now I can drive for another two years.
Gear ratios, tire diameters, and speedometers are funny things. My '80 Jeep CJ-7 came stock with 30-inch tires (not sure of the P-metric size) and 2.73:1 gears. I never really paid attention to the rpm range on the highway (at 65 mph), so I have no idea how much things had changed as a result - but the speedometer was dead on, with the worn-out 31x10.50 Coopers (overall diameter worn-out back to factory size).I was shocked though at the increase in rpm on the freeway, despite the AOD. I calculated it before I ordered it and i came up with an increase of 300 rpm at 120 km/h (75mph) but it seems I was wrong because it feels like it's much more.
Trouble is today I measured my speed with a GPS device because I don't have the new speedo drive thingy yet.
I didn't check if the speedo was accurate before the swap, I think it measured a bit on the high side too, so the 2000 rpm it showed at 120 km/h might have been 2000rpm at only 110 km/h or even less.
Now it reads 3000 rpm at 120 km/h on the GPS.
I guess the overall rise in rpm is about 500 rpm and not the 300 I calculated. Oh well....!
Mike, I noticed you have warmed up your engine, as your reply indicates...how does it run. Any issues? You and I essentially have the same car but mine is stock..just interested in how you like it. I used to have headers on my car but took them off after two days when I crushed them going over a supermarket speed bump!I installed a new timing cover and front seal, new oil pump pickup, oil pan and gasket.
Enter your email address to join: