[V8Vairs] Perfect Engine for V-8 Corvair
GnKHOFFMAN at aol.com
GnKHOFFMAN at aol.com
Wed Nov 3 23:35:14 EDT 2010
Interesting thread....... I have wondered about the spinning tires
thing; if they are good and wide tires, if there is hop, wouldn't there be
loading and unloading? Which I always thought would be a bad thing (similar
issue if speed shifting)? I had assumed (maybe wrongly) that the skinner,
less sticky older tires were one of the secrets to trannys and differentials
living.
Anyway, I will soon have a 390 hp/380 ft-lbs torque (or there abouts) 327
to put in my car. I will run a 3.55 posi. It will be used for vintage
racing (no clutch dumping, no speed shifting). The sweet spot for the cam
(EX284H comp cam) is from 2500 to 6800 rpms.
The old engine was a tired 327, (no idea how many years/miles on it) but
the 3.27 open differential then used held together (bot the 3.27 and the 3.55
have the 2 extra spider gears).
Gary Hoffman
In a message dated 11/3/2010 7:42:38 PM Pacific Daylight Time,
paulsiano at yahoo.com writes:
Might it be a good idea to over inflate the rear tires a bit in an effort
to save the R/P? I added a couple of extra psi on the day my car was
tested and glad I did. The car came back with its tongue hanging out but the
differential stayed together which was really my goal.
Bob, CIDCO, Anderson said the 3.55 is the strongest ratio overall, 3.08
has the weakest pinion gear and the 3.89 has the weakest ring gear. If I
recall correctly, Frank pealed the teeth off a 3.89 ring gear.
The whole question of the "perfect" engine is really all about what is the
strongest engine that has best chance of being contained by the transaxles
we each have and how do we apply power, with abandon or with deliberation.
Rick's "get it moving before nailing it" style is what I always want to
do although I'm not always successful. I've smelled rubber, another feature
enjoyed by those who don't have an engine cover, maybe a dozen times or
so.
I have always thought that an open diff is better than a posi for our
cars. Getting on wheel spinning must put less strain on the R/P. (I could
also be wrong.) Currently I have a 3.55, 4 spider, open diff.
As for the perfect engine for my situation, I'm leaning toward a warmed
302 or a mild 350 but may end up with what's in it now.
The never ending story continues....
Paul
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