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  • Supercharge 3.4??

    Has anyone ever considered taking a 3.8 supercharger and adapting the manifold to fit a 3.4 DOHC??? I think this may be an easier way to make boost as apposed to slapping in a turbo. Either way their is going to be a lot of fab. done. Well if anyone has any ideas or comments Id like to know.

  • #2
    Been talked about never seen a finished one. Just mock up's. The real challenge is the pulys, good manifold and hood clearance. If you use an electric power steering pump and mount it some other place you would have no belt ishus. If its going on a monte it may need a cowl hood. But in my opinion a turbo is a better option. It would be fun to be the first.

    96 Z34 3.4 SC DOHC Getrag, 284 5sd manual transmission, stage 3spec clutch, 97 engine, 97 pcm, S3 intercooler 1 of 1 Roots SC LQ1 in the world 8.5 psi.

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    • #3
      RE: Supercharge 3.4??

      Well, you have two options their. Apparently you could mount it down in front of the engine. Down in front you would need to relocate coils, modual, air box and battery. Then move the fans to the front of the rad and make them push instead of pull. This would have the main body of the blower sitting where the air box is right now. The throttle body would point at the battery where you have two intake options. You could go straight through the battery mount with the filter in the fender well. Or run the piping through the front of the frame where the air intake is now. Then you could use an intercooler with the filter somewhere in front of the rad. Either way you will need to use flexable piping going from the blower to the intake system, to allow for engine movement. You would also have to build the nessesary brackets to mount the unit to the engine. Then build the flange for the pressure side and plumb it up to the plenum. You would also have to remove the throttle plate if you don't have a 96-97 engine. Or swap in a 96-97 plenum. Then you would have to extend the shaft to line up with the pullies. Again you would need to build your brackets and have a bearing to support the pulley. Then maybe it would be possible to run it with your accesory system, or have a separate pulley. The throttle body thing will probably be an issue, maybe you could use a 96-97 TB or possibly something from a North Star V8. Either way you will need to setup a MAF system or convert to a MAP system depending what year your car is and what you think is easier/better. As far as EGR goes you might aswell remove it because you have to do the computer anyway. Unless of course you have some crazy emmision laws.

      The other option is to go traditional and mount it up top. This would require you to take your existing lower intake manifold and weld a flange to it for the blower to sit on. You could then have the correct offset for the pulleys. Then you have to deal with the intercooler/intake thing. With this setup you should be able to keep everything where it is except the air box, you will probably want something bigger. But just for good measure you probably should relocate the battery to help redistribute some of the weight, especially if you use an intercooler. The Throttle issue is the same, except you don't need to worry about what to do with your plenum, because by this time it should be in the bushes. The next thing is to deal with is the EGR, removing it would be best with this situation. Because otherwise it will be a pain. Same issues too with the MAP/MAF and computer retuning. the main difference between the two is, this way you will have to modify your hood. With the other you should be OK.

      Another thing is the exhaust would definatily have to be upgraded and the ignition probably aswell. Plus if you are not knocking down your compression you should use an intercooler for sure and I would pull the heads and polish the combustion chambers too.

      I think that about covers it.

      Lyle

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      • #4
        Mounting it would not be the problem, driving it would be. There is no room to even put a socket on the Serpentine belt pulleys now. Your supercharger pulley would be driven off the crank in front of the serpentine belt, and there is no room for even the belt. You could run the supercharger using the serpentine belt I guess though.

        As for mounting get in contact with animuL. He designed and made the flanges to bolt the whipple to the L67 using the stock lower Intake manfiold. He could design and make the lower intake manifold that would allow you to bolt the M90 upto the 3.4DOHC or even the Whipple to it.
        1995 Pontiac GTP
        Over $12K invested, and still its slow. Maybe thats because thats most all repairs. Don\'t knock the engine though, because thats the only part that has seemed to last.

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        • #5
          Fiero boys are ahead of ya. http://www.fiero.nl/forum/Forum2/HTML/061867.html
          1997 Z34 Monte,: testing 4 exh cam\'s, RSM STB, K&N, Eagle077 245/40/ZR18 Nitto Extreme
          1972 3/4 ton 4X4 longbed, built 350, 400 auto, 6\" spring lift, 35\" AT/BFG\'s, dana 60 front axle, 14 bolt gm w/detroit locker 4.56 gears. My ricer smasher

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