TerryW Posted November 8, 2007 Share Posted November 8, 2007 Simon. What fuel octane do Parajet recommend. Ordinary Unleaded-95 RON or Super Unleaded-98 RON Quote Link to comment Share on other sites More sharing options...
admin (Simon W) Posted November 8, 2007 Share Posted November 8, 2007 Just good old unleded mate. You can go up a notch and go for the 'super' stuff if you like, I am sure there will be some small benefit (but more cost of course) Getting your petrol ready for your new motor mate :D I have a meeting a Parajet tomorrow afternoon and am also picking up your unit. (hope to be home at about 18:00) Yippeeee, weather is looking like it could be on the mend... fingers Xed for late weekend / Monday..... SW Quote Link to comment Share on other sites More sharing options...
TerryW Posted November 8, 2007 Author Share Posted November 8, 2007 Cheers For your comments Si. I better get mixing the 2-Stroke!! I'll be down sometime Sat. morning to collect. Unfortunately the wind strength looks a little too strong for the next few days. But forecasts look ok at the moment for Mon. See ya soon Terry Quote Link to comment Share on other sites More sharing options...
asquaddie Posted November 8, 2007 Share Posted November 8, 2007 Being a non-petrol head, I hope this is not too obvious, but I have just brought a mixer petrol can from eBay for £15 – Very easy to use to get the correct ratio when mixing the fuel. Quote Link to comment Share on other sites More sharing options...
admin (Simon W) Posted November 8, 2007 Share Posted November 8, 2007 You should have went for a 10 L petrol can mate and then just added 200ml. SW Quote Link to comment Share on other sites More sharing options...
asquaddie Posted November 8, 2007 Share Posted November 8, 2007 More accurate for a non-petrol head – Fill both line and mix As per my profile - Still in Training Quote Link to comment Share on other sites More sharing options...
norman Posted November 8, 2007 Share Posted November 8, 2007 Is this over egging the pudding? Quote Link to comment Share on other sites More sharing options...
TerryW Posted November 8, 2007 Author Share Posted November 8, 2007 Cheers for the chart Norman, I've printed it out, as it will be very useful to me. Terry Quote Link to comment Share on other sites More sharing options...
Guest Posted November 8, 2007 Share Posted November 8, 2007 A lot of people think they are going to get more thrust from using a higher octane fuel. This isn't the case, what it does give you is improved margin against detonation. Quote Link to comment Share on other sites More sharing options...
asquaddie Posted November 8, 2007 Share Posted November 8, 2007 Cheers Norman. Nice to keep. Still like my little red can - 'keep it simple' Quote Link to comment Share on other sites More sharing options...
phatboy Posted November 8, 2007 Share Posted November 8, 2007 Just a quick note about oil/fuel ratios. 50:1 means exactly that. 50 parts petrol to 1 part oil. DO NOT be tempted to add just a bit more oil to be safe. The reason for this is it will make the combustion hotter, due to an effective leaner fuel to air ratio for the same carb. setting. By adding more oil to the petrol, when this “pet/oil” mix is metered through the carb. needle & jet to obtain the correct fuel / air ratio for one combustion, say 51(50+1) parts of “mix” to1000 parts of air, the extra bit of oil you put in will now replace the same amount of petrol through the needle & jet, so your carb. metered amount of 51 parts “mix” to 1000 parts of air through the needle and jet would now be made up of 49.?? Parts Petrol and 1.?? Parts oil. Result in a 2 stroke, better lubricated bottom end but a hotter combustion temp. due to a slightly leaner fuel mix = possible piston to bore seize. Anyone familiar with kart racing will know of the driver putting his hand over the carb. air box at the end of the longest straight to choke the engine, richen the air fuel ratio and cool the piston! Quote Link to comment Share on other sites More sharing options...
dantheman Posted November 8, 2007 Share Posted November 8, 2007 Anyone familiar with kart racing will know of the driver putting his hand over the carb. air box at the end of the longest straight to choke the engine, richen the air fuel ratio and cool the piston! Could we get the same result reaching back through the cage and choking our engines in mid flight ? Only joking, I have grown very attached to my fingers. Quote Link to comment Share on other sites More sharing options...
dave_treen Posted November 9, 2007 Share Posted November 9, 2007 My understanding is that the higher the octane, the lower the cylinder head temperature will run. So super unleaded is better than normal unleaded, and if you can get it, Avgas is the best !!!! I have been told that Avgas runs 20% less temperature than normal unleaded. Dave. Quote Link to comment Share on other sites More sharing options...
norman Posted November 9, 2007 Share Posted November 9, 2007 I have heard tell that AVGAS works well. Higher lead content and octane rating. 'Not sure I would want to deviate from proven practice though. Learned research required there I think... Quote Link to comment Share on other sites More sharing options...
martinbg Posted November 9, 2007 Share Posted November 9, 2007 Avgas also runs less power unless you change the engine to take account of the increased safety margin from detonation point. Quote Link to comment Share on other sites More sharing options...
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