Trev and Mark, I recall that the shelf life of petrol in say a gerry can is only a month or so before performance suffers severely. Unfortunately I cant remember the source of this info though, so I may be wrong :)
I can vouch though that it does go "off" - during my resto I fired up the L18 with fuel I had drained from the tank some time earlier and stored in a gerry can. A once docile and happy standard L18 turned into a hard to start, backfiring through the carbie, non idling pain in the butt, and the only thing different was the storage time of the fuel. Andrew > Mark, > > Petrol shelf life is mainly effected by the light ends (lower molecular > weight hydrocarbons) evaporating. These light ends tend to be more volitile > and burn quickly. > > I don't know what the shelf life in a gerry can is, but if the container > seals well then probably at least a few months. > > I don't know what the effects of oxidation on fuel is or whether there are > antioxidants in petrol. > > Cheers > Trev > > -----Original Message----- > From: Mark Alford [mailto:[EMAIL PROTECTED]] > Sent: Friday, 7 December 2001 11:52 > To: [EMAIL PROTECTED] > Subject: Re: CR Ratio > > > Trevor, > > The CAMS motorsport advisory panel met on Tuesday night and have overturned > a decision made some weeks ago to ban leaded fuels from race cars, at least > until the end of next year. This means that next year those people wishing > to run leaded (avgas) fuels may do so, this is assuming your state > government permits it. In NSW the state government has issued an exemption > to motor racing, and will allow the use of leaded fuels. > > For all those who are running Avgas in their cars, a pointer that some one > told me recently. Do not buy your Avgas from race tracks. Generally, due to > the relatively low turn over of the fuel in their tanks, the fuel is not as > fresh as at an air field. The fuel from air fields is apparently much > "fresher" due to a higher rate of usage. I generally turn up at the local > airfield with the race car on the trailer and gerry cans in hand - I have > had no problems with supply so far. > > Does anyone know what the shelf life for petrol is, and how it is effected > over time (eg, sitting in gerry cans etc) Does it actually go "off" as > such? > > Mark. > > ----- Original Message ----- > From: "Pooley, Trevor" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Friday, December 07, 2001 11:19 AM > Subject: RE: CR Ratio > > > > Wayne, > > > > In my L20B I have been using optimax with a CR of 10.3:1 and it has been > OK > > so far. > > > > Avgas is now pretty much only legal for historic racing at tracks. Pretty > > much all other classes for curcuit racing will be on premium unleaded next > > year. > > > > Cheers > > Trev > > > > -----Original Message----- > > From: Wayne [mailto:[EMAIL PROTECTED]] > > Sent: Wednesday, 5 December 2001 21:13 > > To: [EMAIL PROTECTED] > > Subject: CR Ratio > > > > > > Listers, > > On a less humerous note, My problem was a stuffed head gasket... > > Now as i am told, AVGAS will be restricted to purchasing by airplane type > > guys soon, not rev heads. > > So what Compression Ratio can we use with optimax. The L20b had a cranking > > compression @ WOT of 240 psi. Now that i have the head off, i will borrow > a > > burett from work and cc the head and bore to get the comp ratio. > > What are the racers going to do about fuel? or will circuits have a decent > > fuel supply on tap. > > anyone? > > -Wayne > > > > --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]/ > > --------------------------------------------------------------------- > > > > > > > > --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]/ ---------------------------------------------------------------------
