History of MembersPage/Sprocket/SiamesePortProblem
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2010-09-06 13:30:16 . . . . 53d830d8.adsl.enternet.hu [siamese technical problem is small compared to tuning problem]
2007-12-09 23:36:04 . . . . client-86-31-59-82.nrth.adsl.virgin.net [Update]
2007-11-26 22:20:40 . . . . MembersPage/MarcellGal [siamese tuning is hell]
2007-11-25 13:30:01 . . . . client-82-2-125-255.brnt.adsl.virgin.net [Link back to MembersPage added]
2007-11-25 13:27:45 . . . . client-82-2-125-255.brnt.adsl.virgin.net [Request for Altered Firmware]
2007-11-25 13:02:47 . . . . client-82-2-125-255.brnt.adsl.virgin.net [The Siamese Port Problem]


Changes by last author:

Changed:
This page is all about the Siamese port problem experienced by the BL A series engine. This is not the only engine to suffer this problem but it is the only one of this design to have been fitted with fuel injection.
This page is all about the Siamese port problem experienced by the BL A series engine. This is not the only engine to suffer this problem but it is the only one of this design to have been fitted with fuel injection.
Added:
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With configurable injection end-angle, it's not too hard to add the necessary extras

The real problem is that even an experienced installer is very likely to blow up an engine or two while tuning a siamese port injected engine. Not an issue for a factory, where they sacrifice 20+ engines anyway. But for a home tuner, usually the ECU's reputation suffers. The risks and difficulty of tuning were the primary reasons we decided to not add support to diesels and siamese-injection so far. An application where tweaking results in 30..50% success rate makes reputation worse.

Technically:

* Now that there is Injection angle, and individual injector trim

* introducing perhaps an 8x8 table for individual injector trim replacing the simple curve.

** IE individual injector channel x rpm x trim, thus introducing the RPM element. One row per injector channel and 8 columns for RPM.

This would satisfy the needs of siamease port injection, as long as injection angle curve is still present.

After the dual-camshaft control is tuned with all adjustable-cam engines (Toyota, Mitsubishi,Suzuki,BMW,Audi,Volvo,etc...), we rethink this (either with dual wideband onboard, or with a Vems WBO2 round as a tuning tool). Classic Mini and MG ;)

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