I've done 3 installs of these nifty little kits now, 1 on a 3rd gen, one on a..... well, a Frankenstein, and my latest one on my 78 Malibu. It seems almost stupid that I haven't written a tech article on it but I haven't. If there's some interest I'd be happy to spend an hour or so typing. If not, I won't bother.

Just to tease it a little- they are emissions legal and can be bolted on in a weekend for under $2000 and still retain A/C.

 

just curious, how much power increase did you see?

 

I think it would be interesting. Becuase I like the sleeper look I can't put on a big hood but it would be cool to read about what is involoved. My borther is finishing up his 383 with one of those on top for his Nova. What kind of a hood do you have to use to clear it?

 

That's what I've always wondered... how much power increase and will a small 2 inch cowl clear the supercharger, carb and air filter? Please let us know...

 

I can answer that! Here I go ready:
A 144 Blower on a 355 with the performer RPM package Made 510 Horsepower at the flywheel. The blower cleared a 2" cowl with the help of a drop base 14" X 3" aircleaner and produced 4-5 PSI of boost. The blower was old and "used up" it would have made closer to 7 PSI if it was new and a bigger increase in power would have been seen. The car has a 2.77 Rear gear and a TH350 with a 2400 Stall and Small 235/70/R15 rear tires will run a 12.4 @ 118 MPH~ faster if there was less of a traction problem. It would spin the tires all the way through first gear (remember, 2.77 Rear gear!)

A Stock 305 TBI Engine (L03) making 170 RWHP was bumped up to 280~ RWHP After installing the same, used, 144 blower. It was converted to carb for the time being. A holley 850 Blower carb was used to maintain power valve actuation. Its transmission, a 700-R4 with a stock stall speed also spun the tires well into 2nd gear. Same rear gear. totally stock engine. On this 305 the blower produced 9 PSI of boost however, due to a smaller motor and less breathing ability. The carbeurator could have been smaller too but its all I had at the time :-)

Both cars produced power gains of 80-110 RWHorsepower, more with a new/bigger blower is possible. I do not recommend the 144 for modified 350+ cubic inch engine, a weiand 177 or a holley 250 would be a better choice. The 6-71 is not what I consider a daily driving / economical choice, but it can be done. Dont expect fuel economy however. The 355 Got 12 MPG city / 15 MPG highway without any vacuum advance, and the 305 L03 WITH vacuum advance and an overdrive tranny maintained 15 MPG city / 19 MPG highway. As you can see, these blower do not rob fuel economy.

See pics of my blown 355 at:
Http://www.geocities.com/kingtaling

I am stepping up to Holley's Commander 950Cfm Throttle body injection to go with my Weiand 177 Blower. It will produce about 12 PSI of boost with my setup, I am guessing, and with the fuel injections ability to control timing / fuel I will see about 20 MPH highway / 17 City on my radical/blown/fuel injected 355. Stay tuned! Now back to our show...

 

That is some great info! Thanks!

I'm really starting to like the blower idea... I'm building a 350 with the following specs (already have all of this stuff except for the heads):

• 2-bolt 350 (0.020 over)
• 10.2 compression (with 64cc heads) hypereutectic pistons
• Trick Flow 23 degrees aluminium heads (64cc - CNC ported)
• Cam: 216/228 @ 0.50 - Lift 0.454/0.480
• 600 CFM Edelbrock performer carb...
• Edelbrock Performer RPM intake manifold
• Hooker super competition headers with hooker cat-back...

Since the begging I was thinking about a power adder (turbo or blower)... I decided a turbo was too expensive... So blower it is... I'm thinking of getting 72cc heads instead of 64cc to lower my compression to around 9.0:1, is that low enough for about 8 PSI of boost or do I need to go lower? Also, what extra mods do I need to make to the engine? I was thinking of a stronger fuel pump (about how much PSI do I need?)... will the hypereutectic pistons handle 8 PSI? Is the carb big enough or is it too small? Sorry for the tons of questions, but nobody with real experience has ever answered my questions...

 

280hp on a lo3 with just a carb swap?!? stock cam and heads? Man I bet it would make some great power with some decent heads and a better cam...uh oh I think i just found out a good project when tax time rolls around

 

Well, I guess I'll post about it (I'll start a new thread). My expereince is that it'll bump up a mild 350 about 125HP, but my 383 is outrunning the blower pretty bad so I went from maybe 350 to about 425? I'm talking LEGITIMATE flyewheel HP- not magazine inflated numbers. I'll run right next to a Z-06 Vette in a straight line in my big fat Malibu. I'm only getting about 4 PSI of boost, but that's correctable to some extent with overdrive pulleys.

It makes ***'s own torque, though. Which is what I really wanted it for. And it looks cool. NOBODY expects to see an old-school roots blower when I pop my hood. It's a 2 1/2" cowl hood from Harwood and it's a TIGHT fit even at that.

Off to post......

 

yeah that would be cool. Wouldnt it be pretty hard to tune a carb for it?

 

did damon's other post answer you guy's questions?