Tom,
I'm getting a fair amount of response from other
guys to this thread, but some of them are
referring to nitrous oxide instead of nitro
methane. I realize nitrous oxide is gaining in
popularity (understatement of the year for sure!)
on the drag strip, but it appears that a lot of
guys are going to NOS in LSR too. I also realize
I could get a simple plate setup for about $600
and more than double the HP of that little hemi.
(A lot cheaper, but not as nostalgic as a huffer
and nitro methane.)
Do you have any comments and wisdom regarding
laughing gas?
Dick J
-- "Thomas E. Bryant" <saltracer@awwwsome.com>
wrote:
> Dick,
> Sounds good to me. A little story concerning
> Bob & Jim Brissette's Fuel
> Roadster may help you decide.
>
> In 1963 the roadster was running against Cobbs
> & Morris's 215.957 MPH
> C/FR record. Paul Dearth was the driver running
> under the record on the
> down run. They were pondering whether to try to
> return or not, when Jim
> found one plug that was fouling. He replaced it
> with a hotter plug, put
> 40% nitro in it and returned at 229+ for a new
> record of 222.331 MPH.
> Bob said they were doing everything that was
> not suppose to work,
> according to the conventional wisdom of that
> day, which was 8:1
> compression ratio, 25% nitro, & direct drive on
> the blower. They were
> overdriving the blower, had 10.5:1 compression
> ratio, and came back with
> 40% nitro.
>
> This record stood as the fastest high boy
> roadster for several years.
> Bob also had a tank that was the fastest open
> wheel car for many years.
>
> When I first knew Bob Brissette, in preparation
> for Bonneville, he would
> purchase five 300 cu in Chrysler Windsor short
> blocks and proceeded to
> use up one a day. He just bolted on his heads,
> put in the cam and
> mounted his blower and went racing. He was
> brutal on equipment, but he
> went fast, sometimes setting records, if the
> equipment survived. Bob's
> last trip to the salt in competition was in
> 1963. He had gotten married
> and I don't think that his wife approved of his
> obsession. I know his
> mother was opposed to the sport, too. Jim got
> burned badly in the early
> sixties at El Mirage. I don't believe either
> Bob or Jim drove after
> that. Of course Jim has been in and out of top
> fuel drag racing as a
> crew chief and consultant for many years. Both
> Bob and Jim were very
> talented engine builders and they knew how to
> run nitro.
>
> Tom, Redding CA - #216 D/CC
>
>
>
> Dick J wrote:
> >
> > You got to the right answers alright. I just
> hope
> > I'm understanding them. What I envision
> doing
> > is having amotor that I can run gas on
> Saturday,
> > then change jets and whatever that night, and
> run
> > nitro-methane on Sunday. From what you and
> > others have been saying, I gather I can do
> this
> > with about a 8:1 CR if the motor is blown. I
> > believe the little Dodge is 8:1 or 8.25:1. I
> > think that with a good rebuild, good rods and
> > forged pistons, this motor could be a
> candidate.
> > Could I do this with 10:1 CR if the motor is
> > unblown?
> >
> > Dick J
> >
> > --- "Thomas E. Bryant"
> <saltracer@awwwsome.com>
> > wrote:
> > > Dick,
> > >
> > > Sorry, I didn't reply to the main issue in
> your
> > > question. I have not run
> > > gasoline with nitrous as yet. I would
> imagine
> > > that the same logic would
> > > apply as with the fuels without nitrous.
> Alky
> > > has a higher octane
> > > allowing higher compression ratios, but I
> will
> > > attest that Alky will
> > > detonate at 12.5:1 when you hit the nitrous
> > > switch. (Five pistons in
> > > about two seconds) If your tuneup isn't
> right.
> > >
> > > Tom, Redding CA - #216 D/CC
> > >
> > > 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
>
=== message truncated ===
=====
.............................
..........Dick J.............
......(In East Texas)........
..........# 729..............
........Roadsters............
.Hemis and Flatheads Forever.
.............................
__________________________________________________
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