our fuel in nz is absolute cr*^p so i mix about 10 litres of leaded 100 oct av gas (that's about 2 gal) with a tank of 95 oct unleaded and it runs as sweet as . I have a Petronix II installed which im sure also helps with reliability. We do have a product 98 oct unleaded which has been marketed for classic engines but it's not readily avail and there's no doubt av gas sure gives my engine that little bit more zing. cheers Graeme.
I have put racing fuel in it before and it runs a lot better so I was wondering if aviation fuel would also work. It is less expensive than the racing fuel. I can tell the difference in performance with the higher octane.
Have 68 big block with same prob. a Corvette driver turned me on to an additive that really works in my case. I'm kind of reluctant to mention it here for fear of advertising or whatever, but maybe this will change if the web master gives the ok.---S. Try this--www.batterystuff.com/fuel-treatments/
OK, I started out using a full bottle of the SUPREME 130 [ 32 0z. bottle ] to a tank of gas & the results for my car were awsome. Now I'm down to half a bottle & the results are the same. So it's costing now about 5.00 for each tank full of gas, At 7.00 a GALLON for 105 racing fuel this product so far is just right for me.---S.
100 oct is the only leaded fuel now avail in nz - ive tried Moreys oct booster but it doesn't seem to have the same effect as av gas. cheers.
I got mine from the web site mentioned above. I tried a 6 bottle packedge. If you scrool over to the 12 pak & then down they give the breakdown of the amount of so many oz. to the gallon to get the desired octane rating that your looking for. Hope yhis helps.---S.
I ran a 50/50 mix of 100 Low Lead and pump gas for several years in a high compression big block with excellent results. Just be prepaired to bring a couple of big gas cans to the airport. They can't just pump avgas into a automobile because of tax reasons.
in the UK we have 95 and 98 at all stations and also 100 at some supermarket stations. all unleaded, as leaded is only available from about 20 stations nationwide. I am sure someone will point out that there is a slight variation in the classification of petrol in the UK and the US but its really minor.
Phil, the difference in classification of Octane between UK and US is actually bigger than you think. UK uses Research Octane Number (RON) and the US uses an average of RON and Motor Octane Number (MON). (RON + MON / 2) For similar fuels, the US octane number will be rather lower than ours. I'm not sure of the exact conversion, but I think UK 98 RON is about the same as US 95 Octane. I recall some time ago on a trip to the US I cam across something called CAM101 or something similar, which was auto gasolene rated at 110 Octane. I wonder if that's still available out there?
see I told everyone I would be shown up. i suppose in my world that difference is minor. on another note, can you send a picture to my cousin showing the back of the intake manifold and the attachments into the back for the vacuum? its fire up time this weekend i think.
Aviation fuel works great. Mix to a max of 50/50. It will raise the octane and also add some lead for older engines which have not had the valve train updated for the newer unleaded fuel. As mentioned above take some gas cans to the airport as they can not pump into your car.
