Re: the Navarro Six, O-ring questions

[Tom Jennings <tomj@xxxxxxx>]

On Tue, 19 Jul 2005 farna@xxxxxxx wrote:

> That wasn't the final Indy motor then. Navarro's site states "twin turbo-charged Rambler six producing 700 hp". I think the 700 might be an exagerration, or liberal rounding up, but the twin turbos should be accurate. The FIRST Indy motor only produced 550 hp though, so you're on track if that is indeed the first engine. The FINAL engine supposedly had the twin turbos (likely in series -- one blowing into the other -- so it's possible you only saw one?) and produced 640+ hp.

Oh, so that's where I got the 700 number :-) I was wondering how I
made up the twin turbo thing -- apparently I didn't. Well I wish I
had taken better pictures; I was very rushed, I got there 15 min.
before the auction started (long story, I set out to be an hour
early, got very lost...)

Well that would explain the failure of the math to describe the
motor with one turbo. When I was there I did not attempt to trace
out the plumbing, I wish I had (oiling too).



> On July 18, 2005 Tom Jennings wrote:
>
> > I'll do the math later, but here's a quickie: There's a
> > turbo-selection nomograph in the MacInnes book. Using what I do
> > know about this motor (182 ci, 640 hp, TE06 turbo) and assuming
> > 7000 rpm, the boost required to acheive 640hp is literally off the
> > chart -- far more than 30 psi. Interpolating, probably close to 50
> > psi.
> >
> >
> > [I said earlier there were TWO TE06's on the Indy motor. That's
> > wrong. I don't know where I got that. Though I took crappy
> > pictures of the Indy motor there's clearly only one. Duh.  My
> > bad.]
> >
> > 50psi doesn't make sense then. A TE06 will do a pressure ratio of
> > 3.0 at the top of the compressor map top efficiency, and 50 psi
> > would be about 4.3 (I think). r=3.0 would be about 30psi, and
> > 182ci with 30 psi boost is only! 550hp. I got "640hp" from the
> > web...
> >
> > That puts flat-out peak air flow around 50 lbs/min consistent with
> > 550 hp, or 3 hp/cu in.
> >
> > At 8000rpm, you can do this with 25 lbs boost, but then the TE06
> > has run out of poop.
>
>
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