Mick,
Seams everyone has beaten me to it.
> Whats this about Optimax eating rubber parts?
> Is there fact in this?
I am running a new 3/8 fuel line from the tank to the carbs at the moment
and have had no problems here. I have noticed the o rings on top of the pump
jets seamed a little swollen up at winton and the caps needed tightening a
bit (webers). I had a old stuffed bit of hose that goes from the fuel tank
to the filler cap (5/8 diameter). I replaced this with some heater hose for
the short term and the fuel in the hose caused it to leak a sticky foul
smelling goo for a while. It then became hard and brittle. It has been
replaced with something from enzed.
> Did u get any better performance or efficiency with it? As Terry said 98
octane. No better efficency as I have twin 45's jetted for racing and use
about half a litre a minute to my calcs.
> have u had any problems with it? Funny enough no problems except with a L
series turbo setup I ran earlier in the year. We were running Leaded and ran
the fuel tank right down. When we filled up with optimax and started it up.
We let it idle until the optimax came though which caused it cut out. From
then on we then had starting problems with optimax in the tank. Never got
around to working out why as I was sick of fixing blown head gaskets. I
needed reliability so changed to a two litre engine and webers. No problems
since then.
Regards
Trev
-----Original Message-----
From: Brad HALLETT [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, 25 October 2000 2:58
To: [EMAIL PROTECTED]
Subject: RE: Optimax eating rubber fuel lines
Mick
I am up late because I am an insomniac, comes from many years of shift work.
The rubber in your hoses should be synthetic, I cannot however vouch for the
rubber in your carbs. The way I found out was from talking to a bloke from
Shell who told me they had trouble in Perth when it was released. It was
chewing away at some hoses and causing fires. I would suggest that you soak
some 'sacrificial' gaskets and hoses to check before you use it, just in
case.
I can personally vouch for Optimax's gains as I have run it in my missus'
new Barina, and turned it into a rocket. This of course helped economy due
to less throttle.
Regards
Brad HALLETT
http://www.powerup.com.au/~bhallett
Proudly Endorsing:
...DATRATS...
http://203.33.35.34
Datsun Dedicated
For Nissan Motorsport Components
Professional Budget Priced competition equipment
Contact Errol SMITH
email: [EMAIL PROTECTED]
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Mick Ralph
Sent: Friday, November 25, 1994 12:10 AM
To: [EMAIL PROTECTED]
Subject: Re: Optimax eating rubber fuel lines
Brad
Is the "rubber" they make fuel lines out of a synthetic?
I have "rubber" lines going from the fuel tank to the fuel pumps (in the
boot) and to connect the webers and I'm not sure about whats inside my fuel
pumps but i guess they have some sort of rubber diaphrams. I bought it as
'Fuel Hose' and it looks like black rubber to me.
How does optimax compare to the leaded petrol I am currently using?
what do u reckon? And why are u up so late??
cheers
Mick
----- Original Message -----
From: Brad HALLETT <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, October 24, 2000 11:43 PM
Subject: RE: Optimax eating rubber fuel lines
> Mick
> Optimax gives great gains in performance and economy over regular
unleaded,
> but will eat natural rubber. Synthetic rubber hoses and gaskets will
> survive. Still not as good as Avgas but comes close and much cheaper
>
> Regards
> Brad HALLETT
> http://www.powerup.com.au/~bhallett
>
> Proudly Endorsing:
> ...DATRATS...
> http://203.33.35.34
> Datsun Dedicated
> For Nissan Motorsport Components
> Professional Budget Priced competition equipment
> Contact Errol SMITH
> email: [EMAIL PROTECTED]
>
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Mick Ralph
> Sent: Thursday, November 24, 1994 11:14 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Optimax eating rubber fuel lines
>
>
> Hi trev
> Good to hear you are going so well on the track lately.. Makes all the
hard
> work and $$$ seem worthwhile huh?
> Whats this about Optimax eating rubber parts?
> Is there fact in this?
> I was contemplating using it myself but...
> Did u get any better performance or efficiency with it?
> have u had any problems with it?
> cheers
> Mick
>
>
>
> riginal Message -----
> From: Pooley, Trevor <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, October 10, 2000 2:12 PM
> Subject: RE: Optimax eating rubber fuel lines
>
>
> > Brad,
> >
> > What the hell have you been doing with Optimax and ribbed condoms. On
> second
> > thoughts don't tell me.
> >
> > Fuel useage in my race car is half a litre a minute at the moment so Elf
> > Racing fuel at $5 a litre would make for expensive racing. I'll stick
with
> > optimax.
> >
> > Trev
> >
> > -----Original Message-----
> > From: Brad HALLETT [mailto:[EMAIL PROTECTED]]
> > Sent: Tuesday, 10 October 2000 1:35
> > To: [EMAIL PROTECTED]
> > Subject: RE: Optimax eating rubber fuel lines
> >
> >
> > I haven't got access to my old lab equipment, and my current employer
> won't
> > let me use the Scientific section for petrochemical research, however I
> have
> > found three things:
> >
> > 1)Optimax is bloody good cleaning solvent
> > 2)Optimax will destroy rubber seals, hoses and ribbed condoms
> > 3)Elf Racing fuel is about $5 a litre
> >
> > Regards
> > Brad HALLETT
> > http://www.powerup.com.au/~bhallett
> >
> > Proudly Endorsing:
> > ...DATRATS...
> > http://203.33.35.34
> > Datsun Dedicated
> > For Nissan Motorsport Components
> > Professional Budget Priced competition equipment
> > Contact Errol SMITH
> > email: [EMAIL PROTECTED]
> >
> >
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Craig Overend
> > Sent: Tuesday, October 10, 2000 12:49 AM
> > To: [EMAIL PROTECTED]
> > Subject: Optimax eating rubber fuel lines
> >
> >
> > Because of the elimination of lead from fuels, the oil companys have to
> > use a substitute. Aromatics such as benzol, toluene, xylene are used as
> > a replacement. Aromatic fuel blends act as a solvent with rubber parts
> > and require the use of synthetic rubber for fuel hose. Therefore if you
> > wish to run Optimax or Unleaded it is necessary to use synthetic-rubber
> > fuel lines and replace any rubber seals in fuel pumps or carbies etc
> > likely to cause problems.
> >
> > I have heard recently of people having problems running Optimax. Just
> > this weekend at a rally I was helping with servicing. One of the cars
> > was running Optimax with old lines developed a fuel blockage in a 45mm
> > Weber. Didn't think of it at the time but i'll have to mention it to the
> > owner as a possible cause.
> >
> > I learnt a lot of this information from an Aerospace book written in
> > 1963 talking about fuels used in World War II so it aint new!
> >
> > Craig.
> >
> > Brad HALLETT wrote:
> > >
> > > Mmmmmm I'll have to take my turbo 4wd
> > >
> > > (Turbo 4wd diesel ute that is)
> > >
> > > On a more serious note, I was talking to a bloke today from Western Oz
> who
> > > told me that during the testing of Optimax fuel over there, they had
> > > repeated problems with it eating fuel lines and causing fires. I am
> using
> > > Optimax and I think it is great, but perhaps we should all use a bit
of
> > > caution and check our lines regularly
> > >
> > > P.S. Cameron isn't it time your old man bought a dyno?
> > >
> > > Regards
> > > Brad HALLETT
> > > http://www.powerup.com.au/~bhallett
> > >
> > > Proudly Endorsing:
> > > ...DATRATS...
> > > http://203.33.35.34
> > > Datsun Dedicated
> > > For Nissan Motorsport Components
> > > Professional Budget Priced competition equipment
> > > Contact Errol SMITH
> > > email: [EMAIL PROTECTED]
> > >
> >
> >
> >
> >
>
>
>
--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to [EMAIL PROTECTED]
Send submissions to [EMAIL PROTECTED]
No unauthorised redistribution of this email
http://www.ozdat.com/ozdatonline/index.htm
http://www.ozdat.com/ozdatonline/listindex.html
http://www.mail-archive.com/[email protected]/
---------------------------------------------------------------------
