Ignition Timing for 955i cams in 1050 engine - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 1 (permalink) Old 04-23-2019, 04:50 AM Thread Starter
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Main Motorcycle: 2018 Speed Triple RS
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Join Date: Nov 2016
Location: South West England
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Other Motorcycle: 2002 Daytona 955i
Extra Motorcycle: 2015 Speed III R
Ignition Timing for 955i cams in 1050 engine

Iím currently building a special based on 80mm bore pistons with Daytona 955i cams in a 1050 Speed Triple R engine (see Daytona Deliberations/Daytona1075 R).

Ill need to make changes to the ignition map once I have the Cams and pistons installed to get the most from this configuration.

Using Tune ECU Iíve compared the two curves for the 955 and the 1050 engines and there is a fair difference on the graphical curves. Iíve written a spreadsheet to enable me to map the Sagemís 955i curve into the Keihin 1050 ECU however Iím unclear if I can do a straight copy of the map through as the two curves appear to be using different parameters. The Keihin map uses Throttle Position % while the Sagem system uses engine load %. Given there is only one atmospheric pressure sensor a cannot help think that the there must be link between the throttle position and the engine load for this Sagem ECU.

I plan to data-log my 955i using load, ignition and throttle position but just wanted to check if any forum users had experience of using the 955i cams in 1050 engines and what they did with their ignition timing curves in the Keihin ECU?
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