I found a complete B&M 144 blower set up that I am considering putting in my 67. I need to do a rebuild on the short block anyway so could set this up right to run the blower. I have 3:73 rear / turbo 350 or a 200R4 and 350 block. Is anyone using the B&M and what do you recommend for lower end if so. What issues are there with occasional 1/4 mile jaunts such as max rpm etc. Thanks in advance.

The little blower should do just fine if you don't over rev and over power your stock cast pistons. I think a stock engine can hold upwards to an extra 100 to 125hp probably up to 5500 or so rpm without any problems!!! Imho...

If you opt for good quality forged pistons, then you shouldn't have any problem. And the same goes for better rods and even crank, although your stock forged crank should be fine up to a bunch of added power.

The main thing to watch, though is detonation b/c depending on what your CR. is will govern the amount of boost you can take, plus gasoline octane quality!!!

Go for it and make little steps in power to sneak up on your engines ability to handle extra boost in its stock configuration.. That's what I would do...

And if I don't get the "seat-of-the-pants" feel out of my big engine, I will think real hard about a 250 or 256 superchanger addition... pdq67

Thanks for the response. I can build the short block to suit with 8-8.5 CR and use forged pistons and ARP bolts. May have to stick with the stock crank though. Heads are camel hump that I can port exhaust and should work. headers probably will need 2" and cam is still a question. ??I would like to be able to rev +/- 6K at the track.

2" Headers would be overkill and only hurt performance on a 350ci engine, even with a blower. Your heads are not going to flow enough to take advantage of tubes that big (even with the port work). You will probably spin that engine to 6200-6500 max anyway, so you won't need 2" tubes. If you are going to build the engine from scratch, use forged pistons (this will "allow" you to make more power). 8 or 8.5 on the compression would be great, that way you can make the power with more boost, otherwise you will really limit the use of the blower. When set up right those little blowers can run very hard. You might want to think about adding water/alcohol injection (this will prevent detonation and allow more boost). Your heads should work fine with the blower, you don't have to have great heads to make power with it (of course it wouldn't hurt to use great heads). You are right on track to focus on the exhaust side of the head, you will have no problem gettin the charge in, it's getting it out that will help you make more power with a blower. What is your goal for the car?

Royce

Goal for the car is street/strip car expecting compromises both ways. 400 HP would be great.

I never thought of a blower until I came across this one. With the blower it seems I can set the car set up for good drivability and good performance without high maintenance.

400HP will be no problem at all. Build a good short block and put the right cam in it. 400HP will not even be a challenge with the blower.

Royce

jackr,

The 144 B&M is a great unit for the street. The bigger blowers are meant for hi RPM performance but the 144 starts to push air as soon as ya hit the pedal. It has very good low RPM performance which is great for the street but not as good for a pure racing situation. It spins faster than its bigger brothers so it works better at low RPM's but it also creates more internal heat. Heat will be yur enemy unless you control it.

4 years ago I put one on my ZZ4 and love the combo, this is not my daily driver. I've had the aluminum heads pocket ported, roller rockers and lifters(1.6) with the "hot" cam from GM. I would recommend aluminum heads to help prevent detonation. Do not over cam the engine, you will hurt performance. You will need to do research for the "right" cam for your blower setup, this is important.

Forged is nice of course particularly where you live and the heat the engine will be exposed to. An aluminum radiator will also be nice, or at LEAST a very good cooling system. Don't let this thing over heat.

I have a 750 BG carb that was setup by JET performance in California for a blower engine. Get a good fuel pump and a pressure regulator. DO NOT run lean. A high performance mechanical fuel pump is fine and set your fuel pressure to about 7 pounds. I used BG pump and pressure regulator, both nice stuff. Make ABSOLUTELY sure if you have any alcohol in your fuel to get the pressure regulator set up for alcohol. In the Chicago area we have 10% alcohol in our fuel from the pump, no option. I didn't, didn't even thing of it until the fiber element dissolved and went straight to the carb. I now have 2 fuel filters, one before the pump and one after the regulator. Overkill maybe but it makes me happy. Make sure the filter will allow enough fuel to flow to the carb, important.

1 3/4" headers, no bigger and a good flowing exhaust. I used Flow Master 2 1/2" pipes.

I used MSD ignition, stock HEI will probably run just fine unless ya have a lot of boost. I liked the options on the Digital 6 Plus. Also used Billet pro distributor. Use a boost retarder for the ignition advance, MSD has a nice one. My initial advance is 18 and total is 36 at 2800 RPM. I have not setup the boost retard adequately so will not comment on that yet. Many people like to open up the spark plug gap but I have found that .045 works for me. I believe that you can't open the gap as much with boost, seems to hurt performance. Maybe it will be different with the spark retard working correctly.

I have 10:1 CR which is not ideal but works for me. My boost is 4#. With less CR, like 8:1, you can run more boost and be faster.

This is in a '69 Z28 with a BW ST10 Plus trans. Some people are able to close their stock hood but I needed a 4" cowl hood to get it closed.

jackr,

did ya buy the blower?

jackr,
I had a B&M blower on a 327, that was in my 68 camaro. If you have any questions, I can tell you what my setup was.
Bruce

Bruce, can you tell us the setup? This summer I will have enough money for either a pretty soild n/a buildup of my 327, or a b&m/weiand 144 blower. Already knowing what the n/a stup will likely get me in power numbers, what kind of setup and numbers were you running? Thanks a lot

I decided to get the blower. I am trying to work the price with the guy as he wants to sell the complete engine including an M-21 tranny. I figure I would build that short block as it is an 010 4 bolt block out of a 77 pickup. Should have it home in the next day or two.