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Mayor of Simpleton
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4,875 Posts
Discussion Starter #1
Anyone know the fuel injector specs for the 996cc ST4S? What flow rate and at what fuel pressure?

I'm probably going to have to get something that flows just a bit more for the built motor.
 

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Excel Addict
2001 900SSie
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5,345 Posts
A quick search shows it to be the Weber "green top" IW 031

The specs are almost at the bottom of this page. Stan Weiss' - Electronic Fuel Injector (EFI) Flow Data Table

270.1 cc per minute at 3 bar. 25.7 lbs per hour at 43.5 PSI.

I think your ECU is a 59M which can't be remapped with Guzzi Diag. I don't know if JPdiag can write a new map.

Maybe a Power Commander or a Dobeck piggyback to change fuelling if there are versions available for your bike.
 
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Mayor of Simpleton
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4,875 Posts
Discussion Starter #3
Thanks, that looks like the info I need. Mapping won't be a problem--I'll be using a Microtec.
 
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