Date: Thu, 4 Jan 1996 15:07:41 +0500
Sender: Vanagon Mailing List <vanagon@vanagon.com>
From: cetin@kirk.bellcore.com (Cetin Seren)
Subject: Re: Subaru 3.3 liter 6
O.K., some quick calculation, just for fun:
at 4000 rpm, the Vanagon is going at about 70Mph.
assume
35 hp is lost to air friction, transmission, etc.. So, we're left
with:
230-35 = 195 hp...
(I hope I get all unit conversion close)
195 hp == 195 * .77 kWatts == (about) 150kW
70Mph = (1610 * 70 ) / 3600 = 31.31 meters/sec
assume 10% grade, which means altitude increases at 3.1 meters / sec.
(if my definition of % grade is correct -- never got it quite right)
150 kW means we can 150kJoules every second, sooo, we can be driving a
*total load of* : (what was the g factor? 9.8 m/sec**2 ?? )
150,000 / 3.1 / 9.8 = 4937.4 kilograms, or (almost) ** 5 Metric TONS !!**
wow!!!
Soo, you could actually put one of these engines in your Vanagon, and
you would potentially be able to tow 2 more vanagons behind you at
70 MPH up a 10% grade!!! (I can't help wonder what kind of
acceleration you'd get out of it, unfortunately, we do not know the
torque curve -- a torque of 224 ft-pounds would give very decent
acceleration, but at what rpm? 4000?)
Maybe this kind of engine is the one to put the EVanatics to shame and
rival the Porsche 6 conversion :-)
Cetin
James Brill writes:
> Just had to throw this in: Minutes ago I walked past a Subaru
> dealership. They had a big display in the window about some new
> model, I forget which. It has a 3.3 liter six that puts out 230hp at
> 4,000 rpm, torque was something like 224. Just injected, no turbos.
> It had a six coil ignition system, at least that is what I got from
> the poster. I should have walked in and started asking annoying
> questions. I wonder how big that engine is? hmmmmm
>
> Jim (1.6 liters and holding)
> --
> James A. Brill Jr. \\ //
> jbrill@unlinfo.unl.edu \\ \\// // If you're not outraged
> University of Nebraska \\//\\// you're not paying attention.
> free-lance homo sapien \/ \/
| 
