Characteristic of 1s ecu on sti v3
#1
Scooby Regular
Thread Starter
Characteristic of 1s ecu on sti v3
Hi all
my 1997 sti v3 is running a 1s ecu. Can somebody please help me understand the characteristics of the 1s map - i.e. Aggressive at top end? Typical bhp for 1s map?
Also what differences is there with an sti of same age running a 6s map? Advantages and dsadvantages?
I am sefo running a vf23 turbo as expected as wanted to double check after seeing the 1s ecu- lol
Thanks in advance
my 1997 sti v3 is running a 1s ecu. Can somebody please help me understand the characteristics of the 1s map - i.e. Aggressive at top end? Typical bhp for 1s map?
Also what differences is there with an sti of same age running a 6s map? Advantages and dsadvantages?
I am sefo running a vf23 turbo as expected as wanted to double check after seeing the 1s ecu- lol
Thanks in advance
#2
Scooby Regular
iTrader: (9)
The MY97 WRX ran the 1s. The Sti ran the 6s
I have both oem maps on my laptop,from memory there is more aggressive timing and a little leaner fuel map,pretty sure the boost 1.1bar was the same.
The WRX has the VF22(Bigger blower with more puff top end)
The Sti a VF23 a quicker spooling turbo.
If you have ESL then it's a custom map so doesn't matter which of the ECUs' you have.
I have both oem maps on my laptop,from memory there is more aggressive timing and a little leaner fuel map,pretty sure the boost 1.1bar was the same.
The WRX has the VF22(Bigger blower with more puff top end)
The Sti a VF23 a quicker spooling turbo.
If you have ESL then it's a custom map so doesn't matter which of the ECUs' you have.
Last edited by ossett2k2; 02 October 2017 at 08:04 PM.
#3
Scooby Regular
Thread Starter
Thanks for all the info. Any idea how to tell if esl is activated? Boost controller shows 1.15 bar peak I think.
I guess I am struggling to understand why a 1s ecu is on this car running a vf23 turbo. Could someone have swapped a Jdm wrx lump?
I guess I am struggling to understand why a 1s ecu is on this car running a vf23 turbo. Could someone have swapped a Jdm wrx lump?
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#8
Scooby Regular
iTrader: (9)
A piggyback ECU is so called as it is spiced into the loom between the sensors and OEM ECU and modifies signals to trick the ECU into behaving differently.
Easy enough to open the ECU and check,or if someone close by has a lead to plug in.