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JDM UK fuel

Old 08 October 2018, 05:51 PM
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RobsyUK
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Default JDM UK fuel

Does an 05 hawk need a remap for fuel or not?

simple terms please. I donít want a you probably should to be safe but tony down the road has run on chip fat for years with no issues.

Iíve read all posts I can find on it and some say no just use an octagon booster but the most recent say that after 05 the cars ECU are made to use 99 better and donít need mapping.

please can someone with the know tell me if I need to map for momentum or not.

Thank you all.
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Old 08 October 2018, 06:22 PM
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YES
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Old 08 October 2018, 07:01 PM
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Whereís the middle finger imogi 😂
Originally Posted by Faworsbackagain View Post
will a made up car blow up
🚙
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Old 08 October 2018, 09:55 PM
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As I had previously mentioned to you on FB. Japan has a higher RON rating of fuel to us. Just because the ECU may have better knock control it certainly isn't an excuse to run it on the OE JDM map. The cost of running octane boosters to work around this will soon amount up and the price of a remap will prove more cost effective in the long run whilst also netting you more power safely. If you choose otherwise, you may be fine, you may not. But I certainly wouldn't be taking that chance on a £10k+ import. Is there a reason you DONT want to have it mapped as it seems like your trying to avoid having it done?
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Old 08 October 2018, 10:03 PM
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Iím not avoiding it at all.
as I replied on there Iím reading some saying do it and others saying modern cars are more tollerant and it doesnít need doing - unless modding.
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Old 08 October 2018, 10:06 PM
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Well in my personal opinion I would say it's best practice to have it mapped. It's one less thing to worry about going wrong. Look at Hurst Cars, pretty sure every car they get in is mapped for UK fuel before sale. Litchfield cars were all mapped when hitting UK too and im sure many others were also.
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Old 08 October 2018, 11:13 PM
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Pretty sure the jdm map on uk fuel still has room for timing so wont be knocking or causing damage without a tune.

It just wont be running at its best.
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Old 08 October 2018, 11:43 PM
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Originally Posted by Faworsbackagain View Post
will a made up car blow up

this made me tear a gut with laughter
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Old Yesterday, 09:17 AM
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Originally Posted by Dreep View Post
Well in my personal opinion I would say it's best practice to have it mapped. It's one less thing to worry about going wrong. Look at Hurst Cars, pretty sure every car they get in is mapped for UK fuel before sale. Litchfield cars were all mapped when hitting UK too and im sure many others were also.
Got mine for Hurst Cars and was map checked on UK fuel (momentum 99) not mapped.
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Old Yesterday, 11:26 AM
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Originally Posted by slo7899 View Post
Got mine for Hurst Cars and was map checked on UK fuel (momentum 99) not mapped.
Learn something new every day. At the least it's been checked though and not an assumption.
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Old Yesterday, 11:34 AM
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I really wouldn't think you would see any Det/Knock with a stock JDM map on UK fuel,

Surely if that was the case they would be limited to stock power ? But we know there are gains on the table from a map alone.

What I'm saying is that i doubt Subaru sent it from factory with so much timing in it that UK V-Power would make the car run any different, ( Cooncil 95 is a different story tho...)

Wouldn't be too hard to compare both the stock ROM and see what the differences are ?

I'm also sure you can even add timing to the JDM cars on UK fuel which again would show it's not that close to it's knock limit.
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