Loic Posted August 26, 2020 Report Share Posted August 26, 2020 Hi all, A small question I am currently planning my loom for our Citroën saxo kit car that we will be running on a Monsoon X For the injection I have the choice of semi sequential wiring injector 1 and 4 on drive 1 and wiring 2-3 on drive 2 or i am interesting in doing a semi sequential using the 4 drives to be able to apply trims to each cylinder if needed as I don't need extra outputs. So to do this i must use multi group selecting drives 1-4 and then wire in the firing order so inj 1 on drive 1, inj 3 on drive 2, inj 4 on drive 3 and inj 2 on drive 4 is it correct ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 26, 2020 Report Share Posted August 26, 2020 Why not sequential? Is there no cam sensor? Quote Link to comment Share on other sites More sharing options...
Loic Posted August 27, 2020 Author Report Share Posted August 27, 2020 7 hours ago, Adamw said: Why not sequential? Is there no cam sensor? Unfortunately there is no cam sensor it is a simple engine the tu5jp4 Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 27, 2020 Report Share Posted August 27, 2020 Is it single throttle body? or ITB's? Boosted or naturally aspirated? Will the engine be used on the road or for racing only? Quote Link to comment Share on other sites More sharing options...
Loic Posted August 27, 2020 Author Report Share Posted August 27, 2020 11 minutes ago, Adamw said: Is it single throttle body? or ITB's? Boosted or naturally aspirated? Will the engine be used on the road or for racing only? NA with ITB tarmac rallying only and with extreme Cams it produces 226hp at the crank for a 1600cm³ it is nice !!! Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 27, 2020 Report Share Posted August 27, 2020 Ok, you are in luck then. The G4X has a new MAP sync feature, if you connect a MAP sensor to a single intake runner, it can use the MAP sensor to detect the intake stroke instead of using a cam sensor. This will give you full sequential fuel and direct spark ignition capability. Here is a little video explaining some of it: https://www.instagram.com/tv/CC1QR5IHzve/?utm_source=ig_web_copy_link Quote Link to comment Share on other sites More sharing options...
Loic Posted August 27, 2020 Author Report Share Posted August 27, 2020 Thanks adam yeah it seems pretty nice so i need to wire injector1 on drive 1, 2 on 2, 3 on 3, and 4 on 4 ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 27, 2020 Report Share Posted August 27, 2020 correct Quote Link to comment Share on other sites More sharing options...
dx4picco Posted August 27, 2020 Report Share Posted August 27, 2020 Sounds like an awesome feature! Is that only on ITB engine then where you can measure that pressure wave? Quote Link to comment Share on other sites More sharing options...
Loic Posted August 27, 2020 Author Report Share Posted August 27, 2020 Sorry to bother you adam but if it fails to detect how the engine will run ? Semi sequential wasted spark or not start at all ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 27, 2020 Report Share Posted August 27, 2020 It is only needed at startup, once synchronised the engine can stay synced using crankshaft alone. Quote Link to comment Share on other sites More sharing options...
Loic Posted August 27, 2020 Author Report Share Posted August 27, 2020 Just now, Adamw said: It is only needed at startup, once synchronised the engine can stay synced using crankshaft alone. Yes i undestand but if for example the tube connected to the map disconnects will the engine be starting or not ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 27, 2020 Report Share Posted August 27, 2020 It will still start and still run sequential but it will take more attempts to get it started since synchronisation will just be luck of the draw. Approx 50% of start attempts it will spark on exhaust stroke so wont start, so you stop cranking, try again, eventually it will spark on the correct stroke and run. However, out of the probably many hundreds of ecu's I have tuned over the last 25 years I dont think I have ever seen a map sensor hose come off or even a map sensor fail completely - so I think the chances of this happening are pretty remote. Quote Link to comment Share on other sites More sharing options...
Loic Posted October 8, 2020 Author Report Share Posted October 8, 2020 Hi Adam, Sorry to bother you but do the Monsoon X have an onboard BAP and an internal map sensor ? because I can select BAP and MAP both to internal is it normal ? Quote Link to comment Share on other sites More sharing options...
Simon Posted October 8, 2020 Report Share Posted October 8, 2020 Yes it has two independent sensors one for MAP and one for BAP Quote Link to comment Share on other sites More sharing options...
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