[Main Performance Bulletin Board | BBFAQ | Prev by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos Re: Design and execution not the issue Like This Post: - Subscribe to Daily Digest for this Bulletin Board Posted by Shaun [Email] (#683) [Profile/Gallery] (more from Shaun) on Tue, 17 Jan 2006 06:03:39 In Reply to: Design and execution not the issue, Mohammad, Mon, 16 Jan 2006 12:56:10 Alert me when someone posts in this thread: Members do not see ads below this line. - Help Keep This Site Online - Signup

Mohammad,

An engine is an engine. There are limits, as Jonathan S. above points out above. In the book I reference, Mr. Bell turbocharges an NSX in one of his chapters. One of the issues he deals with is the high compression of the NSX and the limits of running high boost in a high compression car. Being a mechanical engineer, Mr. Bell lays out all of the therodynamic formulas for properly designing and installing such a system in such a car, or any car for that matter.

One of the Saab insights would be the need to run, I would think, the Saab APC system. Another insight would be the need for an aftermarket I/C, since the factory Saab set up for 900Ts is not very efficient in the high boost range. Also, it would become heat soaked rather quickly. Big front mounted unit or liquid I/C (which I use) from SPEARCO would be suitable.

Fuel management is another important consideration, both with injector size and fuel pressure regulator. Jak Stoll seems to know quite abit about this.

I suppose some people run stock pistons, but the heat generated by your goal will likely shorten their life considerably, if not destroy them. Many use forged pistons.

Cams are another issue. Overlap, to a certain extent, in N/A motors is somewhat desirable, however, as Mr. Bell points out, overlap showed be minimized in a turbo application.

Bell's book is worth the money.

Shaun


posted by 205.188.11...

• High Compression Turbo Engine, Mohammad, Mon, 16 Jan 2006 06:10:21
  • Re: High Compression Turbo Engine, Dean, Tue, 17 Jan 2006 15:17:27
  • Re: High Compression Turbo Engine, Duncan, Tue, 17 Jan 2006 11:48:36
  • Well, you won't get to 18 psi!, Jonathan Scupin , Mon, 16 Jan 2006 18:44:33
  • Consider that a turbo is compressing air before the >>, Talladega900, Mon, 16 Jan 2006 14:20:54
  • Re: High Compression Turbo Engine, Shaun , Mon, 16 Jan 2006 06:13:44
    • Design and execution not the issue, Mohammad, Mon, 16 Jan 2006 12:56:10
      • Re: Design and execution not the issue, Shaun , Tue, 17 Jan 2006 06:03:39 <-- Viewing This Message
        • Interesting on Bell's NSX example, Jonathan Scupin , Tue, 17 Jan 2006 08:46:19

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