can anyone tell me why 71 series blowers are used more then the 53 series????i have a 6/53 and want to use it but knowone seems to be using them???any help greatly needed cheers adrian
The first number is the number of cylinders 6 the second number is the cubic inch of the cylinder 71 6X71=426 Cubic engine. 6X53=318"
There were many configurations of all the series of 2 cycles, 53, 71 & 92. To my knowledge the 53 was made in 2, 3, 4 straight & 6V & 8V configurations The 71 series in 2 to 12V, the 92 series were all 6 or 8 V motors I have seen. The gearing to the blower was probably part of the tuning process, but the leingth and therefore air volume capability had to change to allow reasonable drive speeds. I would think the smaller blower turning faster would be more sutiable for hot rod use as opposed to a larger unit that would spin harder. They were made to pressurize a crankcase at relatively low RPM. A 6V53 is 318 cubes normally operate at 500 -2000 rpm, flat on the floor is happy, where you would be trying to pressurize an intake of a similar size motor and may want 1000 to 8000 rpm. The amount of pressure needed in both cases is unknown to me, someone has a formula with boost & volume to figure it out. I have had them apart and the bearings & oiling system is adequate so I would think reliability at higher RPM is no problem. I would think a 53 series is preferable due to less turning m*** and therefore better response. Also another consideration is a turbo. Most late detroits used them, designated by T or TT. I ran an Autocar tractor with a 8V92TTA, had a turbocharger off both sides (TT) into the blower and then a water cooled aftercooler (A), BIG balls. Has anyone done a gas motor blown and turbocharged? May be asking too much, but will follow this thread as I think I would like to play with one
71 series were used in ww2 in Lcm landing craft so there were a lot of them cheep after the war plus they move more cfm then the 53 series 53 series also has a flat paddle type rotor and the 71 series has a more efficient spiral type
adrian , that 6/53 is junk if I was you I'd find the nearest trashcan and throw it away . AND when you do please let me know where you throw it I love them Blowers the flat ears gives it a better sound
Has anyone done a gas motor blown and turbocharged? May be asking too much, but will follow this thread as I think I would like to play with one Did a 1600 Dodge colt with a Magnuson blower which was long before I ever heard of anyone using their blowers on a car. have pics. Used a Vega timing belt and gears to run it. Did a slant six turbo many years ago. About the same time acutally mid seventies. Here is a pic of it before it was painted. IT used to run at Cayuga and Mohawk. If you were there in the mid t late 70s youhave seen it run. The Colt only ran at Mohawk. Here is a pic of the slant6 turbo deal. The other I have to scan in but I know where it is and will add it later. Both worked good but the turbo never threw anybelts. The colt would at least once a weekend. It did sound wicked though!!! people used to ask the owner what was in it. He would reply "A blown hemi" which was absolutley true. Currently have a newer Eaton blower in the shop. Probably will go on a slant six in the sr dragster someday. I have a friend with a tree harvesting busines has several 4-53 series GM motors Watched him rebuild his one blower last summer. Seemed smaller to me than a 71 series. Blown Hemi was Jeff Nelles' .Turbo 170 slant in 32 banatam was Stu Denyes' Turbo car won a load of money as Stu was a very good racer.
so does this mean you dont have to turn the vanes like a 71 series???and what are the bearing for petral<higher speed maybe> thanks too eveyone for there info so far,adrian
Not sure what you mean. If your referring to swapping rotors from side to side, it depends on what side the drive rotor is on to begin with. It should be on the drivers side (here at least) or the right as viewed from the front. As far as the bearings and seals go, I'm not schooled up on the 53s, but the stock ones would probably work fine.
The Jalopy Journal
