What would you do? Slant performance
Doug Dutra Build Hot Rog mag 2000
70 Duster
Gutted interior 22 pound A-100 seat
Clifford cam
Hyper pack intake
Clifford headers
Trick pistons
Oversize valves
Shaved/Ported head
Demon 4bbl
Holley blue pump
Weber/Mcleod race clutch
Race built 833
MP Drag shocks rear
Competition Engeniring front
MT slicks (13psi)
8 3/4 Sure Grip
4.30.1 gear set.
Race fuel
Etc Ect Ect Ect Ect Ect Ect Ect
Add Dougs life long knowledge of the motor, with all his techniques & tricks
The best it did was 14.926/78.83
Your math doesnt jive. Nice try though.
But then you know much more about the slant than Dutra right ? :-k
Doug Dutra has forgotten more than most of us will ever know about slant sixes, but, in this particular drag strip test, the MPH at the finish line doesn't match the elapsed time. Any car that will run the quarter mile in less than 15 seconds will be going well over 78 mph. Could have been a typo , (maybe eighty-eight MPH) I dunno, but even the Wallace online calculator lists the probable times for a car running an e.t. of 14.9; it says that car should be going eighty-eight+ MPH at the finish line.
Something's not right with this finish line MPH.
But, regardless of that, we'll assume that the 14.9 number is correct for this hopped-up slant. A 14.9 is just not very quick for a car with that (considerable) amount of modifications. It just points up, once again, the fact that slant sixes don't respond very well to bolt-on speed equipment, even when applied by an expert, which Doug Dutra certainly is.
It's the strangulated, asthmatic, cylinder head. It will defeat the best efforts at moving air through this motor... I'm talking conventional mods, like Doug added to this motor. They just don't work very well, here...
What DOES work well, and there us plenty of evidence to support this, is
forced induction; turbo or supercharging (or, possibly, nitorus oxide, though I haven't seen it tried.)
My own car, a turbo'd 225-powered '64 Valiant has only been to the drag strip twice, but at 15 pounds of boost, and a weight of 3,000 pounds (driver and passenger included) the time slip for its last run in the eighth-mile said 91.5 MPH and an e.t. of 7.6 seconds. That computes to a quarter-mile e.t. of 12 second, flat, at 112 MPH.
And my car is really
S-L-O-W compared to Tom Wolfe's turbo slant (11-flat at 120 mph, weighing 3200 pounds, and Ryan Peterson's, similar 1966 Valiant which has gone 10.67 at 127+ in the quarter, about 400 pounds lighter than Tom's '70 Dart.)
Those two cars are running 28 pounds of boost to get those numbers. They don't seem to incur engine damage at those levels; slants are built VERY tough and can withstand this kind of boost, unlike a lot of V8 cars.
THAT is the way to performance from a slant six.
I wouldn't say that building a slant motor like the one Doug built, was a waste of time and money, but, the results are quite different...
My motor makes, according to that Wallace online calculator, about 357 horsepower at 15 pounds of boost, which is a little more than you could expect from a full-race slant, and it idles like a stocker.
And, I haven't tried 20 pounds of boost, yet, nor 25... As I said, it's only been to the drag strip, twice so far.
Stay tuned; I may blow this thing up, yet... LOL!:banghead:
