You know when I was a kid my first car was a 55 chev 265 3 speed ,
which I ran to death. One of the first things I discovered was that in a
quarter mile I could thrash it threw the gears and it would run 80mph or I
could get it into high gear way early and it would still do 80 in the quarter,
speed was and still is a function of weight verses horsepower / torque. Out
on the salt weight is displaced by wind resistance. If you have a car that
has trouble making the speed for the long course I,m sure lots of gears are
helpful. But basically it will just help you get to the 2 1/4 mile in less
time, but your speed is a function of the power you have. Am I correct ? I
get my car in high gear early and let it pull as hard as it can without
braking traction, I find it's much easier to tell if my tune up is correct
also than if it is pulling with little resistance because of gearing.
Kvach #1392 BB/G alt. 53 Stude
----------
From: Thomas E. Bryant[SMTP:saltracer@awwwsome.com]
Sent: Wednesday, April 21, 1999 1:52 PM
To: Keith Turk
Cc: John Beckett; land-speed@autox.team.net
Subject: Re: Transmissions
Keith,
You think that you are hurting, I run a direct-drive, (no converter)
two-speed Powerglide that drops from 8000 RPM to about 5500 RPM when it
shifts. There are different schools of thought on the subject, but quite
frankly, I'm not sure that it hurts us that much, we still are capable
of a 205 MPH 1/4, with little left at the 5 mile.
If you had fifteen miles under power the speed attained is the result of
Horse Power versus the Resistance to forward motion. The greater frontal
area cars reach the wall in a shorter distance. It is my opinion that
the gearing you speak of is a bigger factor for the streamliners.
Tom
Keith Turk wrote:
>
> you folks realize your destroying my Transmission plans.... shot a hole in
> my Grand Scheme you did... it was my thought that I could accelerate from
> Zero faster if I had a wide ratio.... trans....
>
> At Maxton on the mile this may even be true... But I understand the logic
> of staying in a proper torque band and the decrease in RPM drop between the
> gears.... AHHH now to look at transmissions again... and this was a Doug
> Nash / now Richmond Gears T-10 that I bought special for the wide ratio...
> and it worked like stink in a Autobahn cruiser.... and didn't even need a
> push truck at every stop light
>
> I know of a 5 speed Doug Nash with extra gear sets here in town... I may
> look into that.... it has a 1:1 output... I don't know if it has straight
> cut gears or not.... is that an issue?
>
> Keith...
>
> ----------
> > From: John Beckett <johnbeck@blueridge.cc.nc.us>
> > To: land-speed@autox.team.net
> > Subject: Re: Transmissions
> > Date: Tuesday, April 20, 1999 8:30 AM
> >
> > Dave makes a very interesting point about transmissions. A very
> important
> > and often over looked part of the total combination. My current car has a
> > close ratio, 2.32 first gear, even that is to much. May next car will
> have
> > a very close ratio 4-speed, in the 2.0 to 1.9 range.
> > Discovered last year that exceleration through the first two miles
>could
> > have as much as a 5 MPH difference in the five mile speed.
> >
> > John Beckett
> >
> >
> > At 10:26 AM 4/17/99 -0400, Dave Dahlgren wrote:
> > >I am a newcomer to land speed racing,since '93 but have raced cars
> > >professionally since I was 22, am 47 now.. So when I am out there I am
> > >at work. Land speed racing is no different than any other that I have
> > >been to. There are a ton of tough decisions to make and I am not afraid
> > >to make them. The most important ones revolve around will I make it to
> > >the other end ? My philosophy may not work for most as I plan on setting
> > >a record when we go and at the end of the meet there does not have to be
> > >much left. This does not work for most people as the cost is $$$$$ . But
> > >every pass other than license passes on the car has been a record pass
> > >or the qualifying one before it. have probably jinxed this year by
> > >saying that but do not believe that much in luck, just hard work and
> > >good engineering. If I were in your shoes I would make all the trades
> > >necessary in order to get down the track and pump up the power as money
> > >allows. The only exception to this would be a transmission that allows
> > >you to change gear ratios at will.
> >
> > "Everyone that I have ever helped out there almost always had an
> > impossible combination of gear ratios. either overpower the track early
> on
> > or gear splits that can not be done and stay in the power band on the big
> > end.. There is as much thought required in the transmission than almost
> any
> > other part of the combination. read you NEED a CLOSE RATIO TRANSMISSION
> !!"
> >
> > >
> > >So buy the dry sump,best fire suit and system,best
> > >suspension,transmission. Blow off the 10,000 dollar cylinder heads for
> > >now and the paint well why bother if you do not have the other stuff. It
> > >is not much fun changing bearings in a pretty car, or worse yet dragging
> > >the remains on the trailer after you roll it up in a ball because you
> > >bought the paint instead of the Koni shocks..!
> > >
> > >Regards,
> > >Dave Dahlgren
> > >
> > >Keith Turk wrote:
> > >>
> > >> and your opinion is worth more then the cup of coffee... thanks.....K
> > >>
> > >> now how to do all that on a budget.... Guess I have to settle for the
> fun
> > >> eh...
> > >>
> > >> Bud I am dead serious about this one thing in my life... someday I am
> going
> > >> to be in the two club... if it takes multiple valves and 10 speeds
> then
> > >> that is what I will acquire... Been down a ton of roads over the
> years...
> > >> and I have always accomplished the goals I set for myself... this is
> one
> > >> that has been lurking in the back of my mind since I was twenty years
> > >> old... (41 now)
> > >>
> > >> My Partner has to bring Reality with him and keep me grounded... we
> are
> > >> here to have fun.... and the record someday will happen... I seriously
> > >> don't expect it this year.... I expect to drive the long course and
> have a
> > >> ball... hey and meet my newly made friends from here... But most of
> all I
> > >> expect to take home a ton of lessons on what to and what not to do at
> > >> Bonneville....
> > >>
> > >> Learning Curve here is pretty steep... It was kinda like that with the
> > >> AH-64 Apache when we first started flying it... none of us had a clue
> and
> > >> the engineers weren't much help in communicating on the
> Pilot/instructor
> > >> pilot level... we had to assimilate a ton of new information and then
> > >> decide what was important and what wasn't... Based on all the kids we
> > >> trained and the outcome of their work... I would say we did a pretty
> fair
> > >> job....
> > >>
> > >> This is a ton like that.. for me at least...
> > >>
> > >> I honestly appreciate your being here and lending your knowledge to
> those
> > >> of us that aren't as well versed..
> > >>
> > >> Keith
> > >>
> > >> ----------
> > >> > From: Dave Dahlgren <dahlgren@uconect.net>
> > >> > To: Chris R Harris <yesford@clear.net.nz>
> > >> > Cc: Land-speed@autox.team.net
> > >> > Subject: Re: Belt camshaft drives
> > >> > Date: Saturday, April 17, 1999 5:05 AM
> > >> >
> > >> > Best pushrod engines belong to NHRA Pro Stock 1250 hp 500
> inches..2.5 HP
> > >> > per Cu In that would be 887 hp 355. Winston Cup is around 720
> HP.2.03
> > >> > HP per Cu In.. The prostock guys run them... Belt drive is like a
> dry
> > >> > sump, big money up front hardly any later.. There are many parts
> like
> > >> > that .. The best is usually cheaper in the long run.. Let's face it
> we
> > >> > are out there to do 2 things, Have FUN and Break records!!! It is
> pretty
> > >> > hard to break records if you are not running the best money can buy,
> and
> > >> > I have the most fun breaking records.. Nothing like coffee in the
> > >> > morning at impound :>) Parts i will not race without, dry sump,
> EFI, 4
> > >> > valves per cylinder ( or more), slide throttles, and a trans that
> has
> > >> > many gears.. the rest is usually not a record breaking combination..
> > >> >
> > >> > Just my opinion at least.
> > >> >
> > >> > Regards,
> > >> >
> > >> > Dave Dahlgren
> > >> > Engine Management Systems
> > >> >
> > >> > < Commercial >
> > >> > For those of you that want slide throttles contact me off list we
> make
> > >> > them here. Do EFI also Won 24 hr Daytona twice set pole etc. and a
> > >> > zillion races in Pro Sports Car. Also G\GL and G\FL at Bonneville
> went
> > >> > (215 in Australia) for many years.. Have setups for Ford yates
> > >> > head,Chevy 18 deg,Cosworth BD and YB, Porsche 911, ferrari 348,
> mazda
> > >> > 13b, and any custom thing you can think of.. but it is expensive...
> > >> > <End Commercial >
> > >
> >
> >
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