compression and octane and timing ......
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compression and octane and timing ......
I was researching octane boosters to try out when I have my MAF replaced.
I came accross this scientific article.
Here is what octane the motor should run for optimal performance.
7:1 .......... 89 octane
8:1 .......... 91 octane
9:1 .......... 94 Octane
10:1 ......... 98 Octane
11:1 ......... 104 octane
12:1 ......... 110 octane
13:1 ......... 115 octane
Our S4's are 10.5:1, so at least 98 Octane for best results.
The new RS4 and FSI motors in general are going to be 12.5:1 compression ratios....
damn, 110 Octane....
Timing must be considerably retarded on 91 huh....
What is our 'normal' timing for the S4 ?
How many degrees ? 30 ?
What kind of timing adjustments can Revo, GIAC and APR do to help effeciency, mileage and possible HP gains.
Also, anyone running 'flashed' ecu's and using The Outlaw or Nos or any other OTC octane booster ?
kj
I came accross this scientific article.
Here is what octane the motor should run for optimal performance.
7:1 .......... 89 octane
8:1 .......... 91 octane
9:1 .......... 94 Octane
10:1 ......... 98 Octane
11:1 ......... 104 octane
12:1 ......... 110 octane
13:1 ......... 115 octane
Our S4's are 10.5:1, so at least 98 Octane for best results.
The new RS4 and FSI motors in general are going to be 12.5:1 compression ratios....
damn, 110 Octane....
Timing must be considerably retarded on 91 huh....
What is our 'normal' timing for the S4 ?
How many degrees ? 30 ?
What kind of timing adjustments can Revo, GIAC and APR do to help effeciency, mileage and possible HP gains.
Also, anyone running 'flashed' ecu's and using The Outlaw or Nos or any other OTC octane booster ?
kj
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I don't think that is 'Sprint Blue'.
That blue, on the RS seems more metalic.
It is a bitchin color and I probably wouldn't mind it.
it'll be interesting to see what allocations of colors the dealers get.
It is a bitchin color and I probably wouldn't mind it.
it'll be interesting to see what allocations of colors the dealers get.
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From my experience...LA dealers won't be getting colors other than grey or black for the first batch
I loved Dolphin but was considering Imola. My BH salesman told me LA people only like grey and black and that's all that was coming in to LA (or cali even as a whole). So anything outside of those colors would have to be a special order which would have taken over a month longer to get(was in the process of selling my old car, so that wasn't going to work).
Anyway, good luck getting a dealer allocated color that is not black or grey, during the first batch ;-)
Anyway, good luck getting a dealer allocated color that is not black or grey, during the first batch ;-)
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Not sure if that's applicable anymore (or if it ever was).
My '03 Accord ran 10.1:1 on <b>87</b> octane @ 240hp all day long. I don't know if it can be broken down to a simple chart like that because detonation is affected by timing too.
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Strange, when i got my 2005, just after they hit the shores, the dealer..
had Black, Grey, Nagaro, Red and Silver to choose from.....
But, as long as Graphite Grey is on the boat, I'm fine with that.
But, as long as Graphite Grey is on the boat, I'm fine with that.