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JanTore 05-27-2024 07:43 AM

525EFI Octane
 
Hi.
I know the recommended fuel for 525efi is 87 octane, but here in Norway the lowest we have is 95 octane E10 and only 98 octane without ethanol. I belive 95 here is 91 US and 98 is 93 US
Is it necessary to tune the engine for the higher octane? Just to make it burn better and maybe reduce the gasoline smell from the exhaust ..

Markus 05-28-2024 02:58 PM

Run 98.

Not necessary to tune, but higher compression heads would give more power.

JanTore 05-29-2024 12:38 AM

Ok, thanks:drink:

Griff 05-30-2024 12:13 AM

It is perfectly fine to run your 95 RON in the 525EFI and no need to do anything

Markus 06-01-2024 02:35 PM

Clarification: the reason to run 98 is that it is ethanol free.

Griff 06-04-2024 12:40 AM


Originally Posted by Markus (Post 4899378)
Clarification: the reason to run 98 is that it is ethanol free.

Its not necessary, but you could see if has Whipple has an upgraded tune for the higher octane.

JanTore 06-04-2024 02:07 AM


Originally Posted by Griff (Post 4899566)
Its not necessary, but you could see if has Whipple has an upgraded tune for the higher octane.

Yes my plan was to send them the ecu for the wipple tune. I think I read somewhere that running higher octane then 87 on this engine could actually hurt performance. Is this true?

Markus 06-04-2024 10:49 AM


Originally Posted by JanTore (Post 4899567)
Yes my plan was to send them the ecu for the wipple tune. I think I read somewhere that running higher octane then 87 on this engine could actually hurt performance. Is this true?

Theoretically, yes.

Practically, no.


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