[Wichita-SCCA] Topeka racing invite

Sat Jul 7 18:31:07 EDT 2007

Greg, sounds like you might want to try a Honda carb.  Not from a
motorcycle, my 85 accord had a 3-stage 3bbl.  At least it felt like 3
stages.  I'm not sure what CFM it pulls, but it made the 1.8 12-valve pull
pretty good.  And if one isn't enough, why not 2??

On 7/7/07, Kevin Anderson <silverstoneracer at yahoo.com> wrote:
>
> I had that engine and carburetor on my 1982 S-10.  My truck was pretty
> quick and did everything I asked of it except for when I pulled a 16'
> enclosed trailer full of furniture from Fort Worth to New Mexico.  That was
> a struggle.  I guess I was over doing it just a little.
>
> But, the truck easily pulled the trailer empty from New Mexico to Fort
> Worth.
>
> Kevin
>
>
>
> *Greg Laws <GLaws at cox.net>* wrote:
>
> Hi Dave,
>
> I thank you for the invitation but the Phrog is torn down for a carburetor
>
> transplant and won't be back together in time. It will be a most unusual
> swap -- perhaps unprecedented in all of automotive racing history. I know
> this because there are no adapters available, no technical assistance
> printed, no nothing nowhere. I'm entirely on my own ... again. What is it
> with me and going down the path of total resistance? Don't answer that!
>
> Don'tcha just love it!
>
> Anyway, I've come to the conclusion that the Holley 350-cfm two barrel
> isn't
> doing what I need it to do. The overall cfm size isn't too bad but because
>
> it opens both throats at the same time it gets too large too quickly. In
> other words, it does great with top-end WOT situations but it isn't
> sensitive enough to deal correctly with low and mid-range situations. The
> power curve is soggy until it gets wound up and I'm getting killed by the
> competition in terms of grunt coming off of corners. I desperately need
> more mid-range torque!
>
> In searching around for a solution I came across a most unusual carburetor
>
> to replace it with. It is the Rochester Varajet 2. You say that you've
> never heard of it? I'm not surprised. In the early years of the 1980s
> Rochester took their successful Quadrajet 4-bbl series technology (the
> carb
> that Jim Harrison runs on his 'Vette) and made a 2-bbl version, except
> that
> it wasn't just a Quadrajet sliced lengthways. Nope, they took the basic
> Quadrajet idea of a small primary combined with a very large secondary and
>
> made it better. It went on numerous small GM engines of the time,
> especially the small V/6 engines. The carb that I'm working with came from
>
> a 1983 S-10 with the 2.8L V/6.
>
> The engineers were struggling to make old technology engines meet new
> technology demands for emissions and fuel economy. General Motors hadn't
> made the switch to fuel injection yet but it would be coming soon. The
> Varajet 2 was the last gasp of sophisticated, complex carburetion
> technology
> in the face of the oncoming rush towards fuel injection. The design of the
>
> small primary and accelerator pump was straight off of the Quadrajet only
> sized down for the smaller engines. What was cool about the Varajet 2 was
> the design of the large secondary. The engineers developed the secondary
> with a variable venturi combined with a variable jet, all operating
> automatically based upon air flow demands. In other words, the driver
> could
> pop open the secondary with the throttle but it would never, ever bog. The
>
> system mimics fuel injection in that the power is smooth and torquey
> across
> the entire rpm band. It gives the engine exactly what it needs, when it
> needs it, and never more than that. This was carburetion engineering at
> its
> peak.
>
> The differences are stunning when one places a Holley side-by-side with
> the
> Rochester. There the Holley sits -- simple, functional, completely
> understandable, and attractive. The Rochester is probably the ugliest
> carburetor in the world. It is complex and unfathomable. It has little
> linkage rods going everywhere to vacuum pull-offs and choke shafts. It has
>
> a strange, narrow & long footprint for mounting to an intake manifold and
> an
> equally strange top opening shape for an air cleaner to mount to. Forget
> about ready-made adapters for either top or bottom -- you're on your own.
> The good news is that it flows 350 cfm just like the Holley. The even
> better news is that it should fatten up the torque curve dramatically. Or
> at least that's the theory.
>
> I'll throw some photos of the thing onto my personal website if anyone's
> interested. http://www.greglaws.info
>
> Wish me luck!
>
> Greg Laws
>
>
> ----- Original Message -----
> From: ""-((c)¿(c))-Dave G""
> To: "Wichita Region SCCA."
> Sent: Friday, July 06, 2007 12:06 AM
> Subject: [Wichita-SCCA] Topeka racing invite
>
>
> > Anybody going to the PDX/SOLO at Topeka this weekend?
> > If so, You can paddock with the Wichita Reg guys. Just look for the
> > Yellow #99 Pos ITB Pinto,or the awesome autocross/drag/PDX instructor's
> > Grey CHEVROLET tow truck with the SINISTER BROTHERS RACING in the back
> > window. Spectators, let me know before 3PM Friday so I can list You as
> > crew, You'll get in free.
> > Dave,still looking for a finish or two,,,still,Gird
> >
> > _______________________________________________
> > Wichita-SCCA mailing list
> > Wichita-SCCA at wichitascca.org
> > http://wichitascca.org/mailman/listinfo/wichita-scca_wichitascca.org
> >
>
>
> _______________________________________________
> Wichita-SCCA mailing list
> Wichita-SCCA at wichitascca.org
> http://wichitascca.org/mailman/listinfo/wichita-scca_wichitascca.org
>
>
> ------------------------------
> Building a website is a piece of cake.
> Yahoo! Small Business gives you all the tools to get online.<http://us.rd.yahoo.com/evt=48251/*http://smallbusiness.yahoo.com/webhosting/?p=PASSPORTPLUS>
>
>
> _______________________________________________
> Wichita-SCCA mailing list
> Wichita-SCCA at wichitascca.org
> http://wichitascca.org/mailman/listinfo/wichita-scca_wichitascca.org
>
>

-- 
Wichita Region SCCA
wichitascca.org
There is nothing wrong with old age if your
family still lets you play with your toys.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://wichitascca.org/pipermail/wichita-scca_wichitascca.org/attachments/20070707/deb7815c/attachment.html 