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#21
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powerfc + scali/sean = porn
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#22
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i would have to agree with the power fc route, just find a shop you trust to do the work. Unless you wanna run more then 2 bar , maybe consider a motec.
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#23
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Any word when verso will be available for 99/00 emailed them by no response thus far...
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#24
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Quote:
1. Nice start... 2. Further factual data...I am not referring to the entire ECU process just the Boost. Boost control on pre 01 Imprezas use two main maps. Both are 8x8 in size, but have entirely different functions. Being: "Boost Achieve" and "Duty Cycle Aim". Boost Achieve is two dimensional, and as you know, varied according to both RPM and engine load (some models kept load static). Duty aim map specifies the "best guess" duty cycles required to deliver the desired boost curve, specified in the Boost Achieve map. This map allows the ECU to take a GUESS at the required actuator duty BEFORE closed loop control homes in on the desired boost. Get your aim map too high, and the boost will overshoot. Get it too low, and spool up will be impaired in lower gears. Quasi closed loop, virtual open loop until it gets within control parameters, parameters that vary with RPM and load. Yes you are technically correct but given the system does not work its as good as open loop What happens to boost on a cold night in a pre 01 3. Change is guaranteed! Good discussion.
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Speak to Shane @ SMC Tyres, Unit 6/385 Sevenoaks St Beckenham WA 6107. Mobile 0413 128 087. Tell him Maddog sent you! |
#25
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Interesting discussion here.
On topic: Unichip - meh. As others have said look at a Power FC instead. I don't like the idea of 'tricking' the stock ecu into thinking its doing something its not. Regardless of how good the tune is, it just doesn't seem right. But thats just me. Now for the open/closed loop discussion... My brief understanding: Open loop system: No feedback is involved. Pre-programmed maps are run without checking any meaured variables. Closed loop system: Feedback is put back into the controller from measured variables. Easiest analogy (had to use a word with 'anal' in it) is an airconditioning system. If you just turn it on, cold air comes out. No check to see if the air is too cold, if the room is too cold or you are frozen. Open loop system. A climate control air conditioning system gets feedback from different variables to hold the temperature of the room at a specified temperature. Closed loop system. Now as for the ECU's... From my brief understanding the ECU has a target map for boost, which it tries to achieve. Now to achieve this it has to be reading variables so it can correct the boost to arrive at its target. To me this sounds like a closed loop PID controller.
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[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR] |
#26
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All this technical talk is too much for me.
Oh, and by the way. I bought myself an ECU. Neither Unichip or Power FC. A good 'ol LINK........ If Brads car can run almost 10's using a link they can't be all bad!!!!! SC TER |
#27
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Good luck, a dragcar is a totally different set up to a road or track car. Let us know what type of fuel consumption you get
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Speak to Shane @ SMC Tyres, Unit 6/385 Sevenoaks St Beckenham WA 6107. Mobile 0413 128 087. Tell him Maddog sent you! |
#28
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the link doesn't run brads NOS setup, which is where a lot of the power comes from
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MY93 Impreza GX 1.8L, 0hp, 0nm |
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applications, unichip |
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