Guys got an old blower for 500 bucks. He's not sure what it is. Any help with identifying and if its worth the 500 would be appreciated.
should be worth the money if you have something that it would fit on. You'd have the bitchen-ist car on cruise night.
The little blower should probably be disassembled and everything checked,or bad things could occur . If you want a very nice 144, I have one for sale. PM me if interested.
Thanks fellas, I was thinking of grabbing it for a flathead. Guy claims its from the 50's so a rebuild would be in order.
Yes its 3-71 an just right size for flathead or even any motor under 300 an less then about 8 to 1. Roll it over by hand by pulley an feel if its smooth or or not,its tell on bearings an vain. Give ya a idea of,if just clean up or needs bearing etc.
The drive & rear plate are worth that much. With carbs? I'd be all over it. But then again, I have a problem....
What were those original equipment on??? Not sure I ever saw one that small. Would be great for a flathead.
They were used on GMC diesels. The 3 is for the number of cylinders and the 71 is the cubic inches of each cylinder. Thus 3-71, 4-71, 6-71, 8-71. GM would just add cylinders to increase the size of their engines.That way they could use the same pistons assemblies and sleeves for multiple engine sizes. That blower would be designed for a 213 cubic inch engine.
2-71 also. https://en.m.wikipedia.org/wiki/Supercharger Positive-displacement superchargers are usually rated by their capacity per revolution. In the case of the Roots blower, the GMC rating pattern is typical. The GMC types are rated according to how many two-stroke cylinders, and the size of those cylinders, it is designed to scavenge. GMC has made 2–71, 3–71, 4–71, and the famed 6–71 blowers. For example, a 6–71 blower is designed to scavenge six cylinders of 71 cubic inches (1,163 cc) each and would be used on a two-stroke diesel of 426 cubic inches (6,981 cc), which is designated a 6–71; the blower takes this same designation. However, because 6–71 is actually the engine's designation, the actual displacement is less than the simple multiplication would suggest. A 6–71 actually pumps 339 cubic inches (5,555 cc) per revolution (but as it spins faster than the engine, it can easily put out the same displacement as the engine per engine rev).
I had an 8-92 Detroit Diesel blower that came with a turbo on top. Often wondered why people used 10-71 and 12-71 blowers instead of OEM 92 series
Well, you shut the door on a lot of dudes' dream buying it like that. No way ya did wrong. How's it turn? Did you flip it and look at the case for scoring?
Turns over nice. Bearings seem tight. Rotors are a bit scorched and a few nicks. I'll clean it up and start digging into it
That snout looks flathead length to me. Looks like the used the 3 belt pulleys from a 1st gen. McCullough set-up. Judging by smaller sized of the snout pulley, look to be overdriven but I am no expert on these things. Good luck and great score.
Now you need to find a Cragar rear cover like this for it. The rear bearing plate stays in place, just cover it with something coool.
I think I remover seeing something similar in the classifieds here. Just when I think I'm decent at tuning a carb I pull in home with this! Lots of new to learn.