Exhaust gas pressure with a turbo
Just a note of caution, at around the 37-40 psi point you can't keep those Purosil hoses clamped down. No matter what kind of tube bead is under there they will blow off. If you go that high you'll need to go to either Wiggins couplings or Marmon V-bands. On the HGTS above we went to V-Bands because it was the easiest for us to customize and make custom flanges or adapters.
Thom,
I read your entine '65 Valiant build thread on the .org forum. It was very interesting.
I have three questions for you, and please don't take this wrong; everyone has his own ideas about how to do things; Mine are coming from an old brain that has probably seen better days... and is apparently incapable of "thinking outside the box." I guess I am just set in my ways and too old to change, at 76.:banghead:
But, I was wondering: With all the knowledge you obviously possess about forced induction, and your deep involvement and experience with /6s, how is it that your super-cool '65 Valiant is going to have to go through life naturally-aspirated? It deserves better! An A body powered by a slant six without a turbocharger (or, supercharger,) is like a rhinocerus without a tusk. That original head is SO restrictive, the only way around that strangulated chunk of cast iron is forced induction of some sort (or, nitrous.) Even a super-mild 10 pounds of boost can put that car into the mid 13's, a full second ahead of a stock 340 Duster. It will turn a ho-hum slant six into an exciting, fun-to-drive, muscle-car beater. And, you don't need fuel injection to achieve this. The potential for an easy 300 horsepower is tanalizing. That would drop that BEAUTIFUL '65 sedan, into the good 12's... The lack of enthusiasm on your part for this route had me puzzled, so, I had to ask, nosy old bastard that I am...
Assuming that you actually put a hairdryer on that lightweight A body, you could install a plenty-strong, 8.25" Duster or Aspen/Volare rear with minimal modifications, and utlilze the OEM 2.76:1 gears to advantage. It would enable you to forget about an overdrive, as the turbo slants seem to perform their best with axle-ratios in the "twos." They don't seem to need ratios in the 4's to run their best in drag contests. Weird, but true; Both Tom Wolfe and Ryan Peterson's slant-powered cars (500+ horsepower, each,) have been tested both ways and the 2.76 rears out-performed higher-numerical ratios, running faster and quicker.;.
THIS would allow you to run a 904, insted of a manual/overdrive box for highway cruising.
Tubos and automatics seem to go together exceedingly well.
That '65 is YOUR car to be built the way YOU want it, and I am sure that is what will happen, and SHOULD happen. I just thought I'd suggest some alternative ideas for it...
Ideas that seem to make sense to me, but, that's just ME.... YMMV!
This was my 340-powerewd '64 V-100. :wack:
