Pinguin Posted June 11, 2020 Report Share Posted June 11, 2020 Can someone please help me and educate me more on this kind of bus and engine? Good and bad? Thank you. Quote Link to comment Share on other sites More sharing options...
cactus Posted June 11, 2020 Report Share Posted June 11, 2020 Sorry, do not have an answer but Google show quite a bit about the Flexible`s Quote Link to comment Share on other sites More sharing options...
jcussen Posted June 11, 2020 Report Share Posted June 11, 2020 8v71's were a very popular engine in buses and trucks up until they failed to meet EPA standards and modern 6 cylinder 4 stroke engines replaced them. General Motors made several models of v design 2 stroke supercharged engine, 4/6/8/12v71's and its bigger brother, the 6/8v92. Had a couple of 8v71's in bus conversions, They can run 250 to 350 hp [turbocharged] Still a lot of them around the world, but if you are not a DIY kind of guy, you might have trouble finding someone to work on it. Most bus conversions in the US have converted to Allison auto transmissions. Quote Foretravel 40ft tag 500hp Cummins ISM 1455 watts on the roof, 600 a/h's lithium in the basement. Link to comment Share on other sites More sharing options...
Lou Schneider Posted June 11, 2020 Report Share Posted June 11, 2020 (edited) The Spicer manual transmission is not synchronized, you have to double clutch and use the engine to match the new gear speed or you'll grind the gears when you shift. It's a technique truck drivers have mastered with practice but is a pain for day to day driving. This is why most bus conversions have converted to the Allison automatic transmission. Edited June 11, 2020 by Lou Schneider Quote Link to comment Share on other sites More sharing options...
Av8r3400 Posted June 12, 2020 Report Share Posted June 12, 2020 Look on YouTube - https://www.youtube.com/user/avonpicturethis The Bus Grease Monkey. He does all sorts of videos on Detroit powered busses for conversions. Quote Av8r34002012 Volvo VNL 730 D13 iShift & 2021 Grand Design Momentum 397TH I'd rather die trying to live - Than live trying not to die. -Leonard Perry Link to comment Share on other sites More sharing options...
Bill w/bus Posted August 2, 2020 Report Share Posted August 2, 2020 On 6/11/2020 at 3:32 PM, Lou Schneider said: The Spicer manual transmission is not synchronized, you have to double clutch and use the engine to match the new gear speed or you'll grind the gears when you shift. It's a technique truck drivers have mastered with practice but is a pain for day to day driving. This is why most bus conversions have converted to the Allison automatic transmission. But with a Spicer the clutch never gets used. Well, there the start from a dead stop. Okay. A little use on the clutch. First bus was a GM4108, 8V71 with a four speed Spicer and a delightful three plate wet clutch. Shall we say the first drive was a learning experience. Bill Quote Bill & Lynn Baxter MCI102A3 Conversion, Detroit Diesel S50 Link to comment Share on other sites More sharing options...
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