Jay, Thanks for bringing it up, but I'm not forgetting Carbon Fiber
!
Some of those hillclimb cars are indeed CF and that is how they get a
97 to 100 inch WB car to weigh in like a tube frame 80" WB car.
Going back to old World cheap F440 technology and costs:
The Z19's with 150# drivers came in at 700# + probably 10# margin with
1 3/8" solid steel rear axles and solid steel front uprights and
spindles. Thick steel shock housings in the back. Big 1/4" steel
plates for the front suspension rubbers to bear against. Brass, not
aluminum and plastic radiators. Thick F-glass sidepods, not 2 layup
stuff.
All I am saying is that with todays cheap and lighter CNC'd aluminum
uprights, calipers, and hubs. Then adding hollow rear axles, a low
tech, low cost F500 is quite practical.
Chuck
______________________________________________________________
From: "Jay Novak" <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: <[email protected]>
Subject: RE: [F500] RE: Min weight blues
Date: Fri, 21 Apr 2006 21:52:26 -0400
>Chuck you are absolutely right about the British hill climb
cars. What you
>are forgetting however is that those super light cars cost %50K to
build &
>are CARBOV fiber everything. F500 is a very low cost entry level
class &
>who can afford to or will want to spend that kind of $$ for a F500
car.
>
>
>Thanks ... Jay Novak
>
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED] On Behalf
Of Chuck
>Voboril
>Sent: Friday, April 21, 2006 12:07 AM
>To: [email protected]
>Subject: [F500] RE: Min weight blues
>
>
> There are British
hillclimb and sprint(hillclimb on a level
> track) cars being built with 97" long WB and 255 HP MC
motors that
> only weigh about 550# w/out driver. A kaw motor is about
100 pounds
> lighter than the bike motors going in those cars. Add 18
pounds for a
> primary and secondary clutch and that's still 80 pounds
lighter.
>
> No coil springs and heavy 'ol shock absorbers either :->
>
> I would be extremely embarassed if I could not modifiy or
build a
> new Kaw powered car to 700# complete with fire system and 5
gal fuel
> cell.
>
> There
were 250 Zinks built and most had to run considerable
> ballast(30+ lbs.) to road race with lightweight drivers in
the 150
> pound category to meet 700#.
>
> Those old cars did not have the advantage of present day
lightweight
> CNC'd billlet uprights ,hubs, or hollow steel rear axles,
either.
>
> Bulding a lightweight car is about the
most technically
> non-challenging thing one could ever do.
>
> If you haven't got the skill or you weigh 300 pounds, then
stick with
> a 494 or 493.
>
> As to high compression Kaws, I know the guys that built and
road raced
> motors like that.
>
> The AMW's still kicked their rumps like they were tie
d to a
> tree when they came on the scene.
>
> As to Solo, in my personal opinion, the
current min Kaw weight
> probably will not change.
>
> Chuck Voboril
> __________________________________________________________
____
>
> From: "Jay Novak" <[EMAIL PROTECTED]>
> Reply-To: [email protected]
> To: <[email protected]>
> Subject: RE: [F500] 440 vs 494
> Date: Thu, 20 Apr 2006 23:58:26 -0400
> >I agree that it will be very difficult to do a 700 Lb
Kawasaki
> powered car.
> >It could be done with a 150 to 170 lb driver but
still not
> easy. I think
> >the 494 or the 493 will be very tough to beat because they
have a
> very wide
> >powerband & a ton more torque than the Kawasaki.
> >
> >My 1st 80" wheelbase car weighed 715 with me in it & I
weighed
> about 165 at
> >the time with no real effort at trying to make the car
light, just
> a super
> >simple car.
> >
> >If I do design a new car & I am thinking about it, the
target
> weight will be
> >550 lbs without driver & fuel. I know this is very do-able
with a
> lot of
> >design integration. A couple of my older cars were right
there so
> I know it
> >can be done.
> >
> >Way to much on my plate right now but maybe next year.
> >
> >
> >Thanks ... Jay Novak
> >
> >
> >-----Original Message-----
> >From: [EMAIL PROTECTED]
> >[mailto:[EMAIL PROTECTED] On
Behalf
> Of Richard
> >Schmidt
> >Sent: Thursday, April 20, 2006 9:24 PM
> >To: [email protected]
> >Subject: Re: [F500] 440 vs 494
> >
> >This is great news, but (you just knew there would be a
but), I
> still don't
> >think it will even the playing field in road racing.
> >
> >First of all, it is not that easy to lose 50 lbs. Just ask
anyone
> on a diet
> >! All of the cars out there are designed to weigh 750
with a
> reasonable
> >weight driver. I don't see how you can get a car down to
the 700
> lb mark
> >and not reduce the structural integrity. When I first
raced my
> F500 with the
> >Kawasaki, I had to add ballast. That all changed with the
change
> over to
> >four link suspension and the added bodywork to get
the aero
> working.
> >
> >I am not the familiar with the new chassis, but I suspect
they are
> all being
> >designed for the 493 engine and thus would not be able to
get down
> to the
> >700 lb min.
> >
> >Just one more small change, allow increasing the
compression ratio
> to about
> >9:1 on the Kawasaki. This would be so easy, just mill
some metal
> off the
> >head, reshape the dome, and presto, a 90 HP Kawasaki !
> >
> >Ofcourse some clever chassis designer, Jay are you
listing
> ?, could build a
> >new chassis just for the Kawasaki using all the
improvements
> learned over
> >the years, but apply it to a car designed for a
engine from
> yesteryear.
> >
> >Richard
> >
> >
> >----- Original Message -----
> >From: "Stan" <[EMAIL PROTECTED]>
> >To: <[email protected]>
> >Sent: Thursday, April 20, 2006 3:13 PM
> >Subject: Re: [F500] 440 vs 494
> >
> >
> > > Effective May 1st, Kawi's can run at 700 lbs for even
more fun!
> > >
> > >
> > > Stan
> > >
> > >
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