Hybrid Car – More Fun with Less Gas

better mileage with higher octane? - Page 18

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Posted by Solar Flare on January 8, 2007, 3:30 am

It has worked for computers. And for those that persist they changed
the box so nothing fits too.

Posted by Bruce Richmond on January 5, 2007, 5:41 am

clare wrote:

Seem to recall Dodge had a 413 wedge with 13:1 around 1963.  It may
have been a special order from the factory thing.  The 1964 hemi had
about 12:1.  My '68 340 Barracuda has 10.5:1 stock.  When I put a turbo
kit on my Kawasaki 1000 I put in a set of 7:1 blower pistons so that I
could crank the boost up to 18 psi.  Makes a lot more power that way
than running higher compression with less boost.


Posted by clare at snyder.on.ca on January 6, 2007, 1:48 am


OK, did some more research in my fairly extensive library.
1961-65 413 was only 10:1 on the high compression version - 9:1 on the
RC1 and VC1.
The early 426 was 10.25:1 (1966-67) The NASCAR version was 12.5:1 in
1964, down to 12.0:1 in '65. The "Street Hemi" was an 11:1 engine
Dodge only got the 413in 1965 in Canada - was a Chrysler only engine
from '61 up. In the US the D500 got the 413 in '61 with 10.0:1, even
on the 375 horse version.
In the US for 1962/63 there WAS a very limited edition "RamCharger Max
Wedge"413 at 13.5:1, but this was a COMPETITION engine. The "Street"
max wedge was 11:1

Posted via a free Usenet account from http://www.teranews.com

Posted by Bruce Richmond on January 6, 2007, 6:51 pm

clare wrote:

Back in the 50's and into the early 60's NASCAR required engines to be
"stock" in that everything in them had factory part numbers that anyone
could order.  If you knew the codes you could get most things made to
order from the factory.  There were also dealer installed options.
There were no EPA restrictions at the time, so you could run any engine
they sold you on the street.

The 426 Hemi was intended as a race engine from the beginning.  When it
became obvious that Ford would no longer have a snowball's chance in
hell (and GM was officially out of racing) NASCAR broke from the "gotta
be stock" rules.  The Hemi was restricted to a single 4 barrel carb
even though it came stock with two fours.  The 427 Ford was allowed to
run two fours, even though it only came with a single four as stock.

About '76 I had a '67 Barracuda with after market 13:1 pistons in it,
among other things :)  It ate starters for breakfast and barely got by
on Sunoco 260.  When it came time to choose between it and the '68 340
Barracuda that I also had, I kept the 340.  Still have it :)  It is a
much better balanced car.


Posted by Steve on January 7, 2007, 12:28 am

Bruce Richmond wrote:

There are varying stories about that. Interviews with some pretty
reliable sources inside Chrysler from that time don't always agree with
each other (memory is funny, and none of those guys KNEW that they were
making history at the time!) But a common story is that the circle-track
426 was always intended to have a single-4 in the "bathtub" intake
manifold, and that the drag version (which came along later) got the
dual-quads. Since most "street hemis" went to the dragstrip and not to
an oval, it made sense to sell the "street Hemi" in dual-quad form like
its drag racing Race Hemi brother.

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