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What I mean by the limits is that the release valve opens at 12.5 psi so your boost is cut by the pcm, even if you can get by that you might reach 15 psi. Next thing the pulley everyone went crazy with teh M45 kits in the 2.4s because you can get a better pulley well the M62 is already running at 12000 rpm and its max is 14000 so a smaller pulley isnt going to get you very much at all maybe 1-2 psi tops. Next thing theres a place that modifies M90 superchargers for the GTP guys they do alot as far as upgrading the internals of the supercharger, dont really get any more boost, just increases how fast you reach max boost and velocity, again very marginal gains, of course you can get a better intake and exhaust, reflash the PCM to raise the redline up to 7000 rpm. Upgrade with some lighter pulleys. After that I really cant see much that can be done to it so from all those things you might pick up 40-50hp but theres really nothing to push you beyond that. There is the possiblity of trying to bolt a M90 on to fit but the Eaton blowers dont make very good hp per pound of boost. If I wanted to supe up a Cobalt SS Id rip off that limited factory junk and slap a turbo on it around 20psi, the engine has the built internals to handle it, only problem is keeping the PCM happy
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I said screw it, tired of waiting for GM's unit and bought the RSM one today.
John H wrote:Quote:
I said screw it, tired of waiting for GM's unit and bought the RSM one today.
stage 1 or 2?? how much?