Re: the Navarro Six, O-ring questions
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: the Navarro Six, O-ring questions



On Mon, 18 Jul 2005 farna@xxxxxxx wrote:

wow! double o-ringed block!!

It's weirder than that too. I have no idea what compression ratio was used, until I can find the rods, measure the crank, figure out what gasket was used ...

XXXX errrt! no head gasket could be used! the O-rings would not
work! Duh! The sealant is for the water jacket and oil. Umm I knew
that, right.


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.

There was no intercooler, so the air goes in as hot as a
blowtorch.

Valve lift is probably over .500". The block has valve reliefs
.25" deep, both int and exh.  The top ring is .3125" down from the
crown.  I estimate the valve could open about .6" without hitting
anything (I know those numbers don't add up). But both heads have
shaft-rockers, I wouldn't think you could get a half-inch lift at
the valve with those, the geometry would get wierd at the
extremes, right?







Home Back to the Home of the AMC Gremlin 


This site contains affiliate links for which we may be compensated