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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Ignition Advance
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<blockquote data-quote="Albervin" data-source="post: 128535" data-attributes="member: 586"><p>Martyn, here is an article I wrote for the Riley Club magazine. I do intend to have the timing of my Riley checked soon but in the meantime I seem to have found some power and removed the pinking.</p><p>After years of taking pot luck with fuels in the Riley I decided to try some additives this week. The engine</p><p>never seemed to be always happy with the fuel I fed it. Some tanks delivered good energy and others did not. A bit of a lottery</p><p>even though I try to use BP Ultimate or Caltex Vortex 98 in the RMB. Admittedly the engine is probably in a higher state</p><p>of tune than original but only by way of 8:1 pistons, K & N air filter and a stainless exhaust system.</p><p> I added some NULON Pro Strength Octane Booster at HALF the recommend dose. I was warned by my engine builder that</p><p>using full strength could be harmful to valves/guides and always best to be careful. The petrol tank was quite low according to the fuel gauge.</p><p>I know, these are as accurate as measuring a bore with a tape measure but on a flat surface with the car not moved for ten minutes the gauge was </p><p>just off empty. I added forty litres of Vortex 98 then half a bottle of the Nulon. A trip up Bulli Pass was a bit of an eye opener; the car not only</p><p>cruised up in third gear it would accelerate whenever I pressed the accelerator. Much better than previous but the real test came when I </p><p>turned into my street. A narrow, tight left turn up a steep incline normally required a gentle throttle or else there was some “pinking” or</p><p>pinging but this time the car sailed up and again was open to accelerate. Turning into my drive I have to stop and engage first gear,</p><p>again the car just roared up the drive. Impressed was I! Next was to see if the engine “ran on” when I turned it off: NO it did not.</p><p>Next day I carried out another test on a one hundred mile route and there was no doubt about it, more torque and much easier</p><p>acceleration. Of course there is a cost to all of this and at $23 a bottle that is about an extra $12 a tank. Next tank I may use less and compare the results</p><p>but as I don’t cover that many miles a year I am happy to have a bottle on the shelf for when needed.</p><p> The other additive I bought is a fuel stabiliser. It supposedly stops our modern excuse for petrol from going stale and is quite cheap compared to the </p><p>octane booster, about $2.50 for a 236ml bottle. Ideal for when you don’t use the car very often. </p><p>Both of these additives should be used with FRESH petrol so wait until you next fill up before considering using either or both.</p><p>I hope to give an update after a couple more tanks.</p></blockquote><p></p>
[QUOTE="Albervin, post: 128535, member: 586"] Martyn, here is an article I wrote for the Riley Club magazine. I do intend to have the timing of my Riley checked soon but in the meantime I seem to have found some power and removed the pinking. After years of taking pot luck with fuels in the Riley I decided to try some additives this week. The engine never seemed to be always happy with the fuel I fed it. Some tanks delivered good energy and others did not. A bit of a lottery even though I try to use BP Ultimate or Caltex Vortex 98 in the RMB. Admittedly the engine is probably in a higher state of tune than original but only by way of 8:1 pistons, K & N air filter and a stainless exhaust system. I added some NULON Pro Strength Octane Booster at HALF the recommend dose. I was warned by my engine builder that using full strength could be harmful to valves/guides and always best to be careful. The petrol tank was quite low according to the fuel gauge. I know, these are as accurate as measuring a bore with a tape measure but on a flat surface with the car not moved for ten minutes the gauge was just off empty. I added forty litres of Vortex 98 then half a bottle of the Nulon. A trip up Bulli Pass was a bit of an eye opener; the car not only cruised up in third gear it would accelerate whenever I pressed the accelerator. Much better than previous but the real test came when I turned into my street. A narrow, tight left turn up a steep incline normally required a gentle throttle or else there was some “pinking” or pinging but this time the car sailed up and again was open to accelerate. Turning into my drive I have to stop and engage first gear, again the car just roared up the drive. Impressed was I! Next was to see if the engine “ran on” when I turned it off: NO it did not. Next day I carried out another test on a one hundred mile route and there was no doubt about it, more torque and much easier acceleration. Of course there is a cost to all of this and at $23 a bottle that is about an extra $12 a tank. Next tank I may use less and compare the results but as I don’t cover that many miles a year I am happy to have a bottle on the shelf for when needed. The other additive I bought is a fuel stabiliser. It supposedly stops our modern excuse for petrol from going stale and is quite cheap compared to the octane booster, about $2.50 for a 236ml bottle. Ideal for when you don’t use the car very often. Both of these additives should be used with FRESH petrol so wait until you next fill up before considering using either or both. I hope to give an update after a couple more tanks. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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