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MY98 Impreza STi Mods and Upgrades
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Old 25 Jan 2012, 08:34 PM   #1 (permalink)
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MY98 Impreza STi Mods and Upgrades

Hello

I have a MY98 STi Impreza. the guy who swapped it in changed the turbo to VF28.
I installed Megan 3'' DP and CBE. HKS Suction upgrade, Manual Boost Control and opened it to 1 bar. step colder plugs.


My question, do I require a re-map?

He said that a re-map is not required and that I could upgrade stuff on the M798 with no re-maps and no harm.

when do I need to consider new pumps and fuel system?

is 1 bar safe?
is the VF28 the standard turbo on that engine?

Thanks
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Old 26 Jan 2012, 02:24 AM   #2 (permalink)
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Re: MY98 Impreza STi Mods and Upgrades

Remap for def with those mods, afaik my98 vannot be mapped so you may need a stand alone ecu.
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Old 26 Jan 2012, 11:42 AM   #3 (permalink)
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Re: MY98 Impreza STi Mods and Upgrades

any harm if I don't remap? how much is a standalone ecu?
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Old 26 Jan 2012, 03:42 PM   #4 (permalink)
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Re: MY98 Impreza STi Mods and Upgrades

It might cost you an engine if you don't. There are various options for ecu so prices vary. Think you might be able to get a piggyback board too to make yours mappable
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Old 27 Jan 2012, 01:41 PM   #5 (permalink)
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Re: MY98 Impreza STi Mods and Upgrades

piggyback board is the same think as replacing the whole ECU? what is the price range for that?
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