Small roots blower for smallblock

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I'm thinking there is no way that 144 blower will produce 12 psi. These little blowers Usually pushed around 5 to 10 psi. Unless you have some huge crank pulley and a tiny blower pulley. I don't know, it's been a couple years since I was playing around with my stuff, so I have to check my notes. I think you will be fine with the pulleys you have.
 
I'm thinking there is no way that 144 blower will produce 12 psi. These little blowers Usually pushed around 5 to 10 psi. Unless you have some huge crank pulley and a tiny blower pulley. I don't know, it's been a couple years since I was playing around with my stuff, so I have to check my notes. I think you will be fine with the pulleys you have.

Doing the math the setup I have on the 273 shows 12psi, 7psi on a 340, and 5.7psi on a 360. I am going to start out with a pretty fat a/f, and around 24 degrees of total timing. Hopefully will be getting the radiator tomorrow and hoping to fire it up this weekend. If she comes apart, she comes apart. lol
 
It's alive. Learned a couple hard lessons. Apparently that extra hole that isn't used in the block when switching to a modern timing cover on a 64 273 goes into the water jacket... Found that out Saturday. Tore it all back down, installed a plug. Put it all together, holds coolant. Runs pretty good. Welding the slots in the distributor worked out perfect, has 10 degree spread. Welded the o2 bungs in last night. Need to pull the carb, either a float sunk or a I set it too high. If we get some good weather this weekend I will take it out and see if it is going to survive.
 
awesome can't wait to see a video don't forget to top her up with oil good luck .
 
How much oil should I put in there? I checked B&M and they said to the sight hole, which this one doesn't have. I added to the center of the gear inside and figured it would be enough to idle it with.
 
How much oil should I put in there? I checked B&M and they said to the sight hole, which this one doesn't have. I added to the center of the gear inside and figured it would be enough to idle it with.

I would say that would be good but someone will chime in who knows for sure .
 
They hold about a qt if bone dry
 
I believe it was bone dry or darn close to it. Took about a half a quart to bring it up to the nut of the gear. Any idea where the oil level is supposed to set?
 
There are 2 plugs in the front gear cover. The top one is the fill (and is supposed to have a small vent hole) the other one is the oil level indicator. Simply fill to the bottom of the hole. Oil capacity differs from old style cover and new style cover.
Scampin has the old style....
Mopardude318 has the new style and holds a little more oil....
 
Well i def had the supercharger over filled with oil. Drained it to the correct level. Pulled the hood off and took it for a ride. After some playing with the carb got 14.4 a/f idle, 13.1 cruise, 11.4 wot. Total timing 36 out of boost, 25 in boost. Boost numbers around 6.5psi. Didnt get on it too hard, but it pulls pretty good. Clutch isnt happy, need to figure out whats going on there. Sounds pretty cool under boost. No videos yet, now its snowing..
 
Got the clutch straightened out. Somehow the clutch linkage was out of adjustment and it wasnt releasing it all the way. I dont know how long it will last, but its a tire burner.. Going to have to cut the hole in the hood now.
 
Just watched motortrend episode 8 on YouTube, with a little roots on a hopped up sb ford I think it was a 174 an made 602 up high. An a sea shell blower on the same engine made high 6 hundreds. This is on an engine that already makes mid 400 ponies. But a cool watch to check out.
 
Went past the point of no return, cut the hole in the hood. Actually the guy that owned the car for the last 40yrs before I bought it did it, he did a great job. I have about 300 miles so far on the setup. I had to abandon the vacuum advance idea, it seems it could not act quick enough with a 4 speed and resulted in a few nasty back fires on quick shifts. The a/f's were great so I pulled the meter, but the last trip I did it would fall on its face under sustained load, almost like it was running out of fuel, so I am going to put it back on and throw a fuel gauge on as well. 24degrees timing, pretty cold plug, 91 octane fuel, and 8psi boost, so far no detonation found.

30fe0d21-d7cf-485a-92fe-9df820bff888_zpsvwgklxsx.jpg


image.jpg5_zpslkfv8dwx.jpg
 
I don't think you have enough timing in it yet. You might want to work your way up to 28 degrees and lock it out there. I have 31 degrees with a 340 that has a 6-71 on top and my static compression is 8.4 to 1.

Jack
 
Went past the point of no return, cut the hole in the hood. Actually the guy that owned the car for the last 40yrs before I bought it did it, he did a great job. I have about 300 miles so far on the setup. I had to abandon the vacuum advance idea, it seems it could not act quick enough with a 4 speed and resulted in a few nasty back fires on quick shifts. The a/f's were great so I pulled the meter, but the last trip I did it would fall on its face under sustained load, almost like it was running out of fuel, so I am going to put it back on and throw a fuel gauge on as well. 24degrees timing, pretty cold plug, 91 octane fuel, and 8psi boost, so far no detonation found.

30fe0d21-d7cf-485a-92fe-9df820bff888_zpsvwgklxsx.jpg


image.jpg5_zpslkfv8dwx.jpg

THAT LOOKS SOOO AWESOME!!!!!!


Jake
 
I got a feeling your system will work fine for the mild combination you have. Run the pulley you have, install a boost gauge, keep the total timing at 28° to start with. Less timing if you're seeing over 5PSI.
Best of luck on your build.

I agree with Jack, try bumping up the timing, maybe to 26°
But I'd address the fuel issue first!
THAT LOOKS AWESOME!!!
 
I don't think you have enough timing in it yet. You might want to work your way up to 28 degrees and lock it out there. I have 31 degrees with a 340 that has a 6-71 on top and my static compression is 8.4 to 1.

Jack

Hey there Jack, how much boost are you running?
Scampin is running 8PSI

Perhaps we should start a thread here on how much boost psi and total timing people are running.
 
Make sure your cooling system is up to the task. I have every cooling device known to mankind and I STILL have to watch in traffic. Looks good though!
 
Put the meter on it and took it to work this morning, drove great. Ran it up to about 5500rpm in 4th gear and it didn't skip a beat, so whatever it was the other day is intermittent, which sucks.

I did notice it seems to blow fuel out of the scoop on decel after being in sustained boost, enough to spray the windshield, so I don't know if the carb is still seeing a vacuum signal with the throttle blades closed enough to pull fuel out? Def. need to get to the bottom of that as well.

I ended up with a 24" aluminum radiator made for a chevelle from kcr? 3 core, w/ 16" electric fan in front. So far, so good with it. Couldn't beat 199 shipped.
 
So what kind of money are we talking about to put it on a 360 magnum? Who makes them, and can any guy figure it out. I am able to change engines, transmissions, due head gaskets, etc but not great with hard core stuff but really want to eventually do this.
 
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