Jeff, Here I can get a 10' lenght of 3" DIA light wall not problem. I just thought that the 67mm ID of the 2.5" pipe would suffice. The ID of the stock snorkel is 50mm the 2.5" PVC is 67mm and the compressor inlet elbow is 55mm. The respective areas of the three bores are 19.63 32.25 and 23.76 square Cm. The 2.5" PVC will give a 60% bore increase which I suspect should be enough even with a 20 to 30% boost pressure increase of the MBC+A MOD. The 2.5" PVC would still also offer a 35% increase of flow over the compressor inlet elbow which I believe was designed for maximun efficency (what's the point in building tamed turbos!!). By the way does anybody know wheather this elbow is square or tapered?? It may need a little grinding...
In addition with the 3" I don't think I can use the system I have in mind for anchoring the pipe to the box. The 3" fill the box wall to wall won't fit the sleeves and it would look out of proportion.
Ideally for maximun performance in my opinion the best would be 2.5" PVC with a costant taper from say 3/3.5" till the box bulkhead then on the inside of the box an opposite taper as long as it fits. This would create a Venturi convergent/divergent passage that will accelerate the flow. The maximun acceleration will occur at the narrowest point at the bulkhead and at that point vacuum will be created and could be tapped off. The inertia of the air would thus provide velocities higher than a costant DIA pipe. If I find suitable tapers to mold the pipe on that's want I am going to do.
Years ago I studied the topic and I have seen the application at work in water or steam driven air ejectors to create vacuum in steam turbine condensers or distilling plants evaporators. Ejectors are howesome!!
Did you get the E-mail about your MBC. I replyed to the mesaage you sent a few days ago.
Cheers
Giovanni

posted by 204.244.233...

• NG 900 turbo improvement follow up, Giovanni, Sun, 15 Feb 2004 04:08:49
  • Re: NG 900 turbo improvement follow up, Dean, Sun, 15 Feb 2004 14:46:32
    • Re: NG 900 turbo improvement follow up, Giovanni, Sun, 15 Feb 2004 18:35:19
      • Re: NG 900 turbo improvement follow up, Dean, Tue, 17 Feb 2004 09:09:27
      • MBC+A, Jeff in ATL, Mon, 16 Feb 2004 06:06:40
      • Re: NG 900 turbo improvement follow up, Jeff in ATL, Mon, 16 Feb 2004 05:56:58
        • Re: NG 900 turbo improvement follow up, Giovanni, Mon, 16 Feb 2004 14:25:52
          • Sounds great if it works...., Jeff in ATL, Mon, 16 Feb 2004 17:10:03
            • Re: Sounds great if it works...., Giovanni, Mon, 16 Feb 2004 18:57:37
              • I'll send you a piece of the thin walled PVC, Jeff in ATL, Tue, 17 Feb 2004 08:26:14
                • Re: I'll send you a piece of the thin walled PVC, Giovanni, Tue, 17 Feb 2004 11:58:43 <-- Viewing This Message
        • Final flare, Jeff in ATL, Mon, 16 Feb 2004 06:01:18
          • Re: Final flare, Dean, Tue, 17 Feb 2004 09:25:34
            • Re: Final flare, Giovanni, Tue, 17 Feb 2004 12:04:37

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