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etracer

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I am seriously considering building either a 406 sbc or 377 destroked 400! I will use a small B&M 144 blower Canfield aluminum heads 200 runners 205-160 valves! Want to run low boost so it last and try to get it to run a least 10.8's! Has anyone run a combo similar! Weight will be 3200 lbs glide 410 gears and will buy converetr to match! Oh the cam must cannot be roller! Anyone know much about this deal? Thanks in advance!
 
its pretty possible but i think that mini blower might become more of a restriction, it not very big and cant produce the cfm a larger blower can. if i was u i would look into a procharger or a vortec supercharger and do a blow through setup.
 
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For a 406 I would use the 174 or 177 version. The thing about these blowers is that you will have the same torque curve as a very large BBC, so choosing the right converter could be interesting, and hooking it up will be even more so. The centri blowers tend to become effective at higher rpm and could be easier to race.
 
i have run a 142 on a 383 and we used a 177 on my friends 350 and a 6-71. the smaller blower rock at the street level i have seen guys bolt 142for the 406 on near stock 350 and run 11.40,s on a 406 id say 177 and please dont buy from b$m i know guys that have bought b&m imo and the guys i know also. weinadf 177 and 142 works great and if you dig around you woll see weiands make 30 more hp on 142 and 177 almost 60 check my web site ive had them on my camaro. and the 142 raped the pavement and the 6-71 was at a loss till bout 4 grand and then it ripped i had comp cams 488 501 nitrious hp cam 113 lobe seperation. keep lsa high and your blown street mouse will rock
 
What, have you guys forgotten the Pump Gas Drags Nova with the mini blower/nitrous small block combo? I don't know him personally, but I have seen him run high nines - and he drove it, not trailered. It is a Weiand 144 mini blower, runs an Edelbrock Carter style carb with a mechanical fuel pump. Nothing too fancy, just well thought out.

Thomas
 
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If guys are running the 177's on 454 motors, then a 142 should work on a 406 motor. The key to the smaller blowers is to run them with plenty of overdrive to get the boost up quick and don't worry about how much RPM the motor has on top. Ideally, the motor will come on strong off idle and top out at 5800. That's a lot easier on parts than trying to run 6500-6800.

We were doing a little bench racing and playing with some numbers - what if situation. Using my 9.5/1 408BBC as an example, installing a blower would require a boost limit about 4 PSI. Using both a 142 and a 177 as an example Weiand lists the required overdrive for a 177 on a 400" motor for 9.5/1 CR at about 1.6.

177CI blower will displace 284CI per crank revolution at 1.6/1 overdrive. The 408 motor will only displace 204CI/crank revolution.

A 142CI blower driven at 2.0/1 will deliver the same 284CI displacement / crank revolution.

The 142 will hit harder earlier. If you already have it, I would run it. Play with the pulleys and see where it goes. I wouldn't want to run a 2/1 overdriven blower down the highway flat out for a 100 miles, but around town and 1/4 mile at a time, should be potent.
 
I had a blast at the track with a 3700 lb Chevelle running a relatively mild 383 and a B&M 144. The car was running 11.70's on pump gas in full street trim with a lot more tuning left in it. Man that thing had a wicked sound.

There is one other guy at my local track (Maryland International Raceway) that runs consistent 10.70's at 125+ mph in a 3200 pound Nova with just a 350 ZZ4 crate motor and a old beat up B&M 144 shifting it at 5800 rpm. The only mods to the motor was lowering the CR, putting a GM hot cam in and some roller rockers. He runs about 10-12 lbs boost all day long in the stock GM heads. We both ran Holley 950HP's and had razor crisp throttle response.

Since the smaller blowers are extremely sensitive to RPM/heat build up I would go for a total grunt motor and keep the ratio down to 1.8 to 1 or below.

Good luck.

Chris
 
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Well, Im not an expert on these blowers, but it seems that from the others who do know, you dont want to rev the snot out of it due to the size of that blower. With that in mind, your drivetrain might be what bites you on this one. Assuming you had 29 inch tall tires and a LOCKUP converter, youd have to turn basically 6700rpm to run at about 125 miles per hour(mid to high tens give or take). You could probably pull it with a little less MPH, but probably not a whole lot less, and in turn, not a whole lot less RPM either. Since we are talking about a tranny with a non lockup converter, I think its gonna be hard to run a MPH good enough for tens without at least 6500rpm's.

But, if you step down the gear ratio by a large enough margin to keep your revs a little more sensible for that blower, than you may have trouble getting the thing to leave the line good against the glide tranny.....see what I mean. Maybe Im wrong though and you can in fact build more than adequate torque to leave like a bear with a milder gear agains the glide tranny.

Its a tough call, cause from the advice of the others, it seems as if you want to keep your revs in the neighborhood of 6K with that blower, yet mathematically, the rpm's just arent there with a 4.11 gear at 6000rpm to run a mile per hour thats usually needed to be fast enough for your average high ten second car. With your gears, a 29 tall tire, and a locup converter, youd run 112 MPH at 60 miles per hour. Count on the MPH being less than that at 6000rpm with a non lockup converter.

Once again, Id think that you probably need to be at least capable of 6500rpm to do it. And like I said before, Im not an expert on those blowers and I cant say for sure how well one of those will respond at 6500rpm. Hopefully we will get a little more insight from the others just to be sure so you dont run into any shortcomings or anything along the way. Good luck.
 
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