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Nissan Figaro (FK10) Forum
Figaro Boost
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<blockquote data-quote="30psi" data-source="post: 150923"><p>Well that was an easy mistake to make. I haven't seen inches of mercury for some time. Easy to mix up with Kpa. Anyway I'm not here to compare different engines, but there are some incorrect facts about the ECU.</p><p></p><p>Firstly the ECU does not even think about air temps. Its not some sort of artificial intelligence advice. It purely runs off pre programmed data.</p><p></p><p>The ECU gives an output of ignition advance and injection cycle by the input from the CAS, AFM, TPS (2 parts), and water temp.</p><p></p><p>The water temp is a static adjustment, ie 20% enrichment over the whole range when at a particular temp and so on. It is actually set to have 0% adjustment at normal operating temps.</p><p></p><p>There will be spare capacity in the ECU for fueling and its probably at a bar of boost. Naturally this doesn't mean the boost can just be wacked up, but to certain degrees it will compensate. Pre ignition is caused by the hot air temps, which the ECU doesn't know, and its best to have an intercooler.</p><p></p><p>Not all the ECCS systems have a fuel cut. Only systems like the S13 and upwards have this.</p><p></p><p>You don't have to spend £1000 to get an increase of power. There are ways to introduce more fuel. The system could be run on larger injectors and quite likely could be mapped. </p><p></p><p>I have an S12 which I've increased the power from 135bhp to 237bhp. This is from a few mods on a poor engine design along with a boost increase. Now this was at the maximum the injectors could supply. That is possible due to the available fueling capacity.</p><p></p><p>So in summary... A remap isn't essential for a boost increase. Its ideal for optimum results, but not everyone has the money to do this.</p><p></p><p>We are lucky to have such a flexible ECU system that compensates for the extra boost</p></blockquote><p></p>
[QUOTE="30psi, post: 150923"] Well that was an easy mistake to make. I haven't seen inches of mercury for some time. Easy to mix up with Kpa. Anyway I'm not here to compare different engines, but there are some incorrect facts about the ECU. Firstly the ECU does not even think about air temps. Its not some sort of artificial intelligence advice. It purely runs off pre programmed data. The ECU gives an output of ignition advance and injection cycle by the input from the CAS, AFM, TPS (2 parts), and water temp. The water temp is a static adjustment, ie 20% enrichment over the whole range when at a particular temp and so on. It is actually set to have 0% adjustment at normal operating temps. There will be spare capacity in the ECU for fueling and its probably at a bar of boost. Naturally this doesn't mean the boost can just be wacked up, but to certain degrees it will compensate. Pre ignition is caused by the hot air temps, which the ECU doesn't know, and its best to have an intercooler. Not all the ECCS systems have a fuel cut. Only systems like the S13 and upwards have this. You don't have to spend £1000 to get an increase of power. There are ways to introduce more fuel. The system could be run on larger injectors and quite likely could be mapped. I have an S12 which I've increased the power from 135bhp to 237bhp. This is from a few mods on a poor engine design along with a boost increase. Now this was at the maximum the injectors could supply. That is possible due to the available fueling capacity. So in summary... A remap isn't essential for a boost increase. Its ideal for optimum results, but not everyone has the money to do this. We are lucky to have such a flexible ECU system that compensates for the extra boost [/QUOTE]
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