Why will my STI2 not go over the 110mph stage
13 October 2004, 09:51 PM
#31
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Rob,
Z4 looks good to me apart from the usual concerns about fuel octane. It's the STi ones that worry me...have a look at a few and you'll see what I mean.
Even some of the later ones (STI5) show significant creep in EGTs over sustained high load periods at as little as 4500rpms, though I haven't been fortunate enough to see the maps, or even guess what Subarus intended allowable temps were.
therefore I am
Originally Posted by I
The Z4 ECU is a lot less likely to cause this
Even some of the later ones (STI5) show significant creep in EGTs over sustained high load periods at as little as 4500rpms, though I haven't been fortunate enough to see the maps, or even guess what Subarus intended allowable temps were.
Originally Posted by tweenierob
is that a yes or a no then? i think?
therefore I am
13 October 2004, 10:07 PM
#32
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lads i have an my96 v2 sti with hks headers a full decat a dump valve and an hks induchion kit with a delimiter on the speedo cable and mine goes way past 112 mph
14 October 2004, 12:39 PM
#34
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Sounds like i may have stirred up a wasps nest with this problem!
Myself and the garage decided to take the ECU out of a 95-STI2-RA snd slap that into my car.
hold the phone, we are travelling at just under 150mph. WTF
The standard ECU seems to be stopping the car at 112mph but with the other ECU we just kept going and going.
oh and another thing, the STI2-RA has a fifth injector but it seems to be just a dummy as we disconnected the fifth injector before a test run in the RA and nothing seemed to change......why is this?
Cheers,
Chris
Myself and the garage decided to take the ECU out of a 95-STI2-RA snd slap that into my car.
hold the phone, we are travelling at just under 150mph. WTF
The standard ECU seems to be stopping the car at 112mph but with the other ECU we just kept going and going.
oh and another thing, the STI2-RA has a fifth injector but it seems to be just a dummy as we disconnected the fifth injector before a test run in the RA and nothing seemed to change......why is this?
Cheers,
Chris
30 August 2007, 10:28 AM
#37
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Rob,
Z4 looks good to me apart from the usual concerns about fuel octane. It's the STi ones that worry me...have a look at a few and you'll see what I mean.
Even some of the later ones (STI5) show significant creep in EGTs over sustained high load periods at as little as 4500rpms, though I haven't been fortunate enough to see the maps, or even guess what Subarus intended allowable temps were
Z4 looks good to me apart from the usual concerns about fuel octane. It's the STi ones that worry me...have a look at a few and you'll see what I mean.
Even some of the later ones (STI5) show significant creep in EGTs over sustained high load periods at as little as 4500rpms, though I haven't been fortunate enough to see the maps, or even guess what Subarus intended allowable temps were
Right, biggest cause of engine failures in Turbocharged Impreza's, oil pump failure and bad fuelling.
Temps etc, well the engine is designed to be run at FULL load for as long as possible, though you point out the STI v5 map, well its a known fault that the map is flawed and has a lean spot (fuelling problem, engine failure) and the older cars that die, lots down to bad servicing and others to oil pump failure, though thats not saying the odd one doesnt go pop for no apparent reason, other parts can fail
Back to the original question, do as people suggest, slowly go up though the rev range, keep in 5th gear, dont floor it so you keep off max boost, but even with overboosting (this can lead to other potential problems if your running the wrong fuel, or even problems if your running the right fuel) you should be able to go higher.
Now you have to do some counter investigation, your car worked before you added the last parts, take them off and go back to the original, if it still doesnt work then you have a problem somewhere else, simple
Tony
30 August 2007, 10:42 PM
#38
The ecu is mapped for rpm against load and NOT speed, speed is not even considered when mapping fuel and ignition etc. The speed limit is entirely separate and the described problem is purely that, the converter is clearly not working to send the converted signal to both ecu and speedo, the speedo may read mph BUT the ecu is still seeing the km figure and its the ecu that controls the speed by dropping boost etc.
So not complicated.
Talk about confusion and "a little knowledge"
Rob does know what he speaks of.
In the lower gears at less than limiting speed but at rpm's higher than those achieved at the limiting speed do you think the ecu is running on different maps ... not I assure you.
cheers
bob
So not complicated.
Talk about confusion and "a little knowledge"
Rob does know what he speaks of.
In the lower gears at less than limiting speed but at rpm's higher than those achieved at the limiting speed do you think the ecu is running on different maps ... not I assure you.
cheers
bob
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