[Amc-list] Navarro six specs / relatively cheap "V8 killer" / fun with Rambler Mentality

[Tom Jennings <tomj@xxxxxxx>]

OK, I've been picking at this, I think I worked out the big chunks of 
how the Navarro six was set up. It's 5.95" bore by 3.00" stroke, for 
182ci, from a worked-over 199ci.

I calculate 520hp at 5800 rpm, a broad flat torque peak of 500 ft/lbs 
from 3500 - 5500 rpm, with a Garrett turbo, .50 A/R, 3.1" turbine, 25 
lbs boost. It's in the green for surge, overspeed and choke.

I have two TE-06 turbos with A/Rs around .47, plus a T04 same A/R. I 
plugged in small tube headers, open exhaust. And the factory stock cam! 
I kept getting crazy numbers when I tried the specs from the Winfield 
cam. I assumed that something like that was installed, but maybe that 
cam was in a box, on a shelf, for a reason. I really have no idea what 
was in the motor, but the software made sense when I used stock numbers 
(actually, a 195.6OHV cam as that's what I had entered and saved, but 
it's pretty much the same as the 199/232).

It's gotta ping the whole time though. Probably why the monster cylinder 
walls, crazy exhaust valve, double-O-ring head and block, etc. It looks 
like Navarro upped bottom end oil supply, but the valve junk in the head 
was totally stock.


OK so no one today would make a 500hp 199ci six (though it would be most 
cool at the track). But if you took a dead-stock 199 with .030 over 
pistons, ran 8 lbs of boost, and $$$ your way to 6000 rpm, you'd have 
300 ft/lbs torque from 3500 - 5000, and 275hp around 5500 rpm. (It's the 
same shape curves as the stock 199, just taller :-)

That short stroke is the key -- the 232 gains a lot of torque, but loses 
1000 rpm and 20 hp.  The 258 is even worse, lots of torque, but HP peak 
moves down to 4000.

A hot 199 would be a fun, unique, and relatively cheap motor. Light too, 
and uses parts that no one wants (Rambler Mentality).


OK it would only kill stock V8's :-) but that would still be fun!


So I think this is what I'm gonna do with the fancy Navarro head.
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