| Author | Message | ||
| David Evans (Dmd)
Registered Member Username: Dmd Post Number: 367 Registered: 10-2004 Posted From: 173.77.211.20  Rating: N/A |
Hey Fred, there is a 55 Flex with an auto trans on Ebay for sale, maybe you could get some info on the rear end ratio and she runs for him. | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 951 Registered: 10-2006 Posted From: 76.202.165.190  Rating: N/A |
THANKS! I will take a look , but I think each engine -tranny/OD combo will need to be optomized as a package. Now planning on 1300rpm at 70mph in OD as target. FF | ||
| Tom Christman (Tchristman)
Registered Member Username: Tchristman Post Number: 127 Registered: 1-2006 Posted From: 66.218.33.156 Rating: N/A |
FF- hope that 1300rpm is not with a two stroke engine-too low for any power. If it is a none turbo, 1600rpm should be the lowest cruise speed. If it is turbo'd, 1400rpm should be the lowest. It sounds good on paper, but I think you'll be disappointed in the performance and ultimately not go into overdrive much with that gearing. Good Luck, TomC | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 969 Registered: 10-2006 Posted From: 76.202.165.190 Rating: N/A |
Looking at a 3.07 rear ,DD series 50 and 31 psi turbo boost, ZF HD 600 5 speed with .84OD. The 4 strokes love low RPM for fuel economy. So far this coach has had a 2 stroke 6cyl, a 4 stroke 8 cyl , and now a 4 stroke 4 cyl engine. FF | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1663 Registered: 10-2003 Posted From: 71.58.71.157  Rating: |
I wouldn't go below 336 from looking at the approx numbers if you are going to pull a trailer. direct: 46@1100, 50@1200, 54@1300, 58@1400, 62@1500. Overdrive: 54@1100, 59@1200, 64@1300, 69@1400, 74@1500. This is with a 1200x22.5 of average dia. of 42.7" and 485 revs. Your results may vary.Here is a calculator; although you probably have one. http://www.free-online-calculator.com/calculators/recreation_calculators/car_calculators | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 976 Registered: 10-2006 Posted From: 76.202.165.190 Rating: N/A |
Thats a great calculator . I found some free aluminum wheels , so a set of super singles is out , so low profile ,low rolling resistance 11R 22.5 will be the best chance at breaking 15MPG. The DREAM! I'm sure it can be done , the big question is at 45mph or 75 mph? BY spring we will see. FF |
