I do not know the % of loss but bottom line is not to get disappointed if
the number is not as high as the next guy as there is no possible standard of
measurement between dynos/atmospheric temps/engine performance on a given day
etc...the real question is does the on street or on track performance satisfy
you? At the track, if you win your race(s) the “dyno numbers” are pretty
much irrelevant.
Many "numbers” are erroneous, misleading, and at best are a guideline – key
word is guideline; another tool in your war chest of Mopar knowledge and
experience. Rear end ratios and high stall convertors will also skew the
numbers and prevent accurate readings or comparisons.
For example, my rear wheel dyno numbers on my 67 Dart w/mild transplanted
340 build (284 Cam, LD340 intake, 850cfm Thermoquad, stock pistons & valves,
1 5/8” Headers, 2.5” exh. pipe, head work...)
277 rear wheel HP
268 “
“ “
from all the “other guy’s” numbers I should be ashamed to drive down the
street, much less hit the track. However, I turned 12.8 @106mph in the
quarter mile (even let off the throttle prematurely on that run) and beat every
car I raced that night (obviously all the paired cars were under 12.8...)
Gary Pavlovich
Sent: Thursday, October 04, 2012 6:32 AM
Subject: Re: dyno results and car update
Once apon a time I was told that the biggest loss was the rear
differential, and that the 90 degree turn of the power was the culprit more so
than the transmission
WoW!
that nuch parasitic loss?? I wonder if some kind of
friction
reduceing manual tranny (4 speed) lube and rear end
lube would make
a noticable difference?
.........................MO
On Oct 3, 10:50 pm, Richard Kinsley
<leroar.kinsley...@xxxxxxxxx>
wrote:
> As an example of dyno
numbers, back in '63 I had my '59 Ply Sport Fury 318
> power pack dyno
tuned in Garden Grove, CA. The horsepower was about 112hp
> at
60mph in high gear with 2:94 rear and 14" tires. They didn't run it
up
> like they do now and find the max. There is a percentage of
power loss but
> it varies with the application. Some drive lines are
more efficient than
> others. I think a 15% loss is fairly
good.
>
> Rich Kinsley '64 Dodge Polara LeRoar 4dr 324 poly
w/goodies
>
>
>
>
>
> On Wed, Oct 3, 2012
at 12:25 AM, MO <mic...@xxxxxxxxxxxxxxx> wrote:
> > I
like your Plymy and what you are doing with it.
>
> > I am
afraid to admit how old school I am, but how does dyno at the
> >
rear wheels translate into numbers on an engine dtno? I know the
rear
> > wheel dyno reads less but I am not familiar with the
numbers you give
> > to know just what kind of power your engine has.
..................MO
>
> > On Oct 2, 2:26 pm, SL
<slid...@xxxxxxxxx> wrote:
> > > I've finally had some time
to work on the car in the last few weeks and
> > > drive it a bit
before the snow falls here. Installing an MSD fixed the
> >
> starting issues...bad coil or orange box was the culprit everything
else
> > > checked out. The 440 six pack got some tuning on
the dyno and she's
> > > running really good now. 355hp and
383tq with 38 degress of timing.
> > > Elevation here is
~3500'
>
> > > In addition to the planned alterktion install
I'm starting to put
> > together
> > > my plans for the
Megasquirt EFI. I may keep it a six pack by going with
> > >
the following intake from F&B Throttle Bodies.
>
>http://www.fbthrottlebodies.com/images/photos/440%206bblsys.gif
>
>
> > Cheers,
> > > Stacy
>
> > >
IMG_20120924_112031 (Large).jpg
> > >
103KViewDownload
>
> > > IMG_20120921_090422
(Large).jpg
> > > 141KViewDownload
>
> > --
>
> --
> > --
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>
> >
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>
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--
> Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies- Hide quoted
text -
>
> - Show quoted text -
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Clubhouse public email address. This practice will protect your privacy,
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person -- directly to that person. That is, email your parts/car transactions
and negotiations, as well as other personal messages, only to the intended
recipient. Do not just press "reply" and send your email to everyone using the
general '62-'65 Clubhouse public email address. This practice will protect your
privacy, reduce the total volume of mail and fine-tune the content signal to
Mopar topic. Thanks!
1962 to 1965 Mopar Clubhouse Discussion
Guidelines:
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and
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