The question I have is about ignition advance. I have been running 98 octane fuel and every thing was good, then the other day I put 95 octane in and at anything above 3500rpm it started to get a bit hot . (like 90-95* instead of the normal 80-85*)
Does the 95 need more or less advance, or should it be the same?
Pete

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A recent study found the average Aussie walks about 900 miles a year
Another study found Aussies drink, on average, 22 gallons of alcohol a year
That means, on average, Australians get about 41 miles per gallon

Kind of makes you proud to be an AUSSIE

I am no expert on ignition timing, but I would think lower octane would require a slightly higher timing setting for the same power output.

Slight hijack: when did standard octane unleaded drop to 91 RON ? I always thought it was 93.....

This is what my thoughts are: Less octane, less advance. High advance on low octane fuel means there is a higher chance that your engine will ping. Also has alot to do with what compression ratio you are running. The more compression the more likely you are to ping on lower octane fuel. If you are running lower octane fuel and it doesn't ping, don't worry about it?

Overheating is usually because the ignition is too retarded???

If you are changing from 98 to 95, that's quite a small jump and it shouldn't matter unless you are running really high CR?

Jam Normal has always been 91 RON

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Lillee - 1969 Morris Mini K

I must admit, when I switched from Vortex to Ultimate, I bumped up the timing a tad and the performance is noticably better!

I spent a good 2 hours running up and down homebush stadium testing the ignition timing for Lillee last night. I think it's good... but it's hard to tell really... So long as I am 90% of the way there I think it's good enough.

But don't tell anyone before Dyno day!

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Lillee - 1969 Morris Mini K

geez mate...talk about taking things seriously!

(pssstttt...I am taking JAM for a run out to the Northern Beaches tomorrow....just to get some k's up on the stroker motor before the dyno run)

Who's taking things seriously?? not me! I aint the one who's sending to england for parts

cmon dude, people are flying in from overseas, and making DVDs of the day! Have to show em how it's done

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Lillee - 1969 Morris Mini K

Its gonna be HUGE! <insert picture of Darrell Eastlake here>
Hell, I'm driving out all the way to the Hills District just to see Lillee!

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One should never skimp on the zip ties.

Haha eats Lillee for breakfast, with low fat soy milk

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Lillee - 1969 Morris Mini K

Seeing as how I'm now a member of the Lillee fan club, can I please have the Speedy G Avatar?

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One should never skimp on the zip ties.

LOL sure, dowload one of them from here: http://images.google.com/images after typing in Speedy Gonzalez. Resize it to max 100 by 100 pixels, way you go!

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Lillee - 1969 Morris Mini K