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Fuel info info 95 vs 98 with DYNO Graph's via TP


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if this isn't definitive I dont know what is

 
Torque Performance added 5 new photos to the album: Subaru GT B-Spec Chiptune+.

13 May ·

This is an excellent example of how much of a difference 98 octane has on some vehicles over 95 octane. In this case, on a stock standard 2.5L Subaru Legacy GT B-spec the first run (red line) was with no tune running 95 indicating 132kW. The next run (blue line) we drained the tank and filled with 98 octane fuel which registered an extra 11kW gain at the wheels from just higher octane fuel alone.

This happens due to a feature of some modern vehicles computers where it pulls ...

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+2

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internet argue away

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Solid proof good fuel makes the difference.

Does that 4th gen they have up belong to anyone on here?

The 5th gen aint so bad but the 2.0L 4th gen they put up is well into plastic TMIC failing territory. 21 psi must surely be getting to the edge of the compressor map for a turbo that size too

F2BD58A8-49FA-4286-9A61-98297D319509_zps

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Horrendously boost spiking in 2nd graph(maybe factory WGDC values at low rpm) as well, the auto is not liking the power delivery. VF38/VF45 are way off their compressor efficiency at that boost

That auto in the first graph is pulling trans line pressure to protect itself the way that spikes and dips before slowly recovering. Our local AUDM Gen5 usually go from 132Kw to 185Kw with just a tune with the auto holding correctly(decat dump pipe ran a 13.3 1/4mile)

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 BINKZ said:
Shame we can't get 98 anywhere in Southland or Otago (other than Dunedin).

Cromwell have it now :)

But for you poor folk, Link and a nice tune on 95 will still be 10x better than the factory ECU and 98.

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 Timmah said:
Cromwell have it now :)

But for you poor folk, Link and a nice tune on 95 will still be 10x better than the factory ECU and 98.

Yeah i'm not paying like $3k for that ae. Will wait for ESL tuning to release the 99/00 maps.

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