Went down to get my "new" Speed-O-Motive catalog, yicks it's l996
edition, how does this happen so quickly? Anyway they have a very good
tech article on running nitrous,I assume the new catalog does also. There in
Santa Fe Springs, CA. phone number should be 562-945-2758, The main thrust
of the article is the importance of retarding spark so your peek cylinder
pressures are in the right place at the right time. This is an extremely
informative article from guys that should have a pretty good handle on the
subject. Kvach in No. Idaho <saltracer@awwwsome.com>
To: Dick J <lsr_man@yahoo.com>
Cc: dahlgren <dahlgren@uconect.net>; <Land-speed@autox.team.net>
Sent: Monday, May 22, 2000 7:27 AM
Subject: Re: Fuel and Gas Class
> Dick,
>
> I think it depends on how much nitrous you intend to use. Some articles
> I have read say that lower compression ratios work better with high HP
> systems. There are some excellent articles in the past Hot Rod
> Magazines. I will look through my collection and see if I can come up
> with the issues. I'm sure that there is also good info on the net.
>
> Tom, Redding CA - #216 D/CC - It was 100 degrees here yesterday,
> looking for more of the same through this week
>
>
>
>
> Dick J wrote:
> >
> > What CR would be recommended for Nitro/Alky mix,
> > higher or lower than for gasoline?
> >
> > --- "Thomas E. Bryant" <saltracer@awwwsome.com>
> > wrote:
> > > Dick,
> > >
> > > It really depends on what you want to do, I
> > > guess. I have always used
> > > the same motor in both classes. I just build
> > > for Gas Class and accept
> > > that it will be a little less effective on
> > > Fuel.
> > >
> > > We run about 12.5:1 compression, I have found
> > > that it gets real
> > > difficult to get much more than 13:1 in a 302
> > > cu in Chevrolet motor. We
> > > do well on Alky, better when adding nitrous,
> > > and have run 33% nitro with
> > > good success in the 1/4 and 1/2 mile drags. In
> > > 1967, we ran 190 MPH at
> > > El Mirage in D/FR, at that time we held the
> > > D/GR record at 173.74 MPH.
> > > That was as far as I could run the engine on
> > > nitro without major
> > > problems, it was detonating severely at the end
> > > of the run. My best time
> > > at Bonneville on nitro was 196, I could never
> > > make it live past the 1
> > > 1/2 mile with all cylinders running. It was
> > > surely a great ride while it
> > > lasted.
> > >
> > > I was running a basic gasoline setup, just
> > > changing nozzles and jet, the
> > > fuel pump was a Hilborn "0" which didn't
> > > deliver enough fuel for the
> > > longer runs. Everyone told me that running that
> > > percentage on 12.5:1
> > > compression ratio wouldn't work and basically
> > > they were right, but I got
> > > by with it on the short runs and had a ball.
> > > Kinsler tells me that I
> > > could run up to 20% nitro with the pump and
> > > nozzles I am using for Alky.
> > > They recommend going 16% larger richer on the
> > > bypass jet for each 10% of
> > > nitro. Some day I'm going to try it again. I
> > > have five gallons of nitro
> > > that I have been saving for a long time.
> > >
> > > Tom, Redding CA - #216 D/CC
> > >
> > >
> > >
> > >
> > > Dick J wrote:
> > > >
> > > > Tom,
> > > > I was just cruisin through your website again
> > > and
> > > > noticed that you made the notation that you
> > > run
> > > > both gas and fuel under a single photo, which
> > > got
> > > > me thinking. Do you run both gas and fuel in
> > > the
> > > > same motor? Can you do it all at one meet?
> > > Or is
> > > > it a complete changeover from one meet to
> > > > another? I have often wondered what the
> > > > differences between fuel and gas motors were.
> > > I
> > > > know that gas motors run common CRs in the
> > > 10:1 -
> > > > 12:1 area, and alcohol runs something like
> > > 15:1.
> > > > What if they are blown motors, CR must be a
> > > lot
> > > > lower. What about unblown nitro motor - what
> > > > kind of CR does that run? And last, what
> > > about a
> > > > blown nitro motor - what CR do they run?
> > > >
> > > > I guess what I'm asking is: can a single
> > > motor,
> > > > either blown or unblown, be built to run both
> > > > gasoline and nitro, or alcohol with just
> > > simple
> > > > changes like timing and jets?
> > > >
> > > > =====
> > > > .............................
> > > > ..........Dick J.............
> > > > ......(In East Texas)........
> > > > ..........# 729..............
> > > > ........Roadsters............
> > > > .Hemis and Flatheads Forever.
> > > > .............................
> > > >
> > > >
> > >
> > __________________________________________________
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> >
> > =====
> > .............................
> > ..........Dick J.............
> > ......(In East Texas)........
> > ..........# 729..............
> > ........Roadsters............
> > .Hemis and Flatheads Forever.
> > .............................
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Send instant messages & get email alerts with Yahoo! Messenger.
> > http://im.yahoo.com/
>
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