Quote:
Originally Posted by slemnah
I think it is fantastic what you have been able to accomplish for you and your bride. I am very impressed as is everyone else that Hamas seen your work. I am curious to see how well that 8.1 pulls that motorhome with the extra weight. I am subscribed to this thread as I can't wait to see the end result. I would also love to see you in a campground one day.
Steve
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even when i had the gm 350 / th400 in the RV i could out run big trucks at red lights
but if got stop on a hill with out a running start i was stuck in 1st gear all the way up
all so revers when backing up was geared to high so i really had to get down on it if i was in grass or some thing
after you run the numbers with the 8.1l it all most has the some HP torq as the 300 that was in the RV
the RV well run well and move really good with the 8.1l i just dont know at this time what the MPG is going to be
i keep thinking shoud i have tryed for the 6 speed allison so testing well start with the 5 speed
number are showing to be
Horsepower Torque
Manufacturer – Engine
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GM – Vortec 8100 V8 gas
340hp @ 4200 rpm
455 lb/ft @ 3200 rpm
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trans this is the numbers for the 6 speed
OK 275/70R 22.5 has a 38" diameter and a loaded radius of 17.6".
So 19" + 17.6"=36.6" loaded diameter so an extra 1/2" with these shorter 275/70R 22.5
engine rpm=2000, gear=4.77, tire height =36.6
1st=15mph
2nd=25mph
3rd=32mph
4th=45.5mph
5th=64mph this is where i would be testing with the 5 speed
6th=75mph not sure if the load would be to high if i would ever make it in to this gear
i dont have the numbers at the min for the motor that was in the RV but here is why the 8.1l
Horsepower Torque
Manufacturer – Engine
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GM – Vortec 8100 V8 gas
340hp @ 4200 rpm
455 lb/ft @ 3200 rpm
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Ford – 6.8L V10 gas
275 hp @ 4250 rpm
410 lb/ft @ 2650 epm
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Dodge – 8.0L V10 gas
300 hp @ 4000 rpm
425 lb/ft @ 2800 rpm
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