massimo forza Posted September 30, 2021 Report Share Posted September 30, 2021 Hi guys! i am a newbie, i am trying to map a skyline r33 with rb25det. the engine has been completely revised. - audi r8 coils - gtr camshaft - forged pistons - 360 degree GTR optical sensor - gt30 turbo - greddy intake manifold - fmic - 750cc EV14 injectors - fuel pressure regulator and rail radium with fuel pressure sensor - 320 l / h petrol pump I am doing the preliminary setups and I have noticed two problems. the first is that when I set the "min effective pulse width" the fuel table I cannot modify it if this is set to 1 ms. in the picture I have the current settings. I use the modeled table. if I set it with different values it works correctly. can it cause problems? the second is that when I exceed 2000 rpm the engine enters as in the limiter, I still have to set the trigger with the stroboscopic lamp. could this be the cause? how does the sensor understand the current position of the motor if it is not set? thank you all for taking the time to read this post! Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 1, 2021 Report Share Posted October 1, 2021 It would be best to attach your tune and a log of the limit happening. I would say at a guess that oil pressure limit on GP limit 1 looks a bit optimistic for some engines, 300kpa @ 2500RPM... 4 hours ago, massimo forza said: the first is that when I set the "min effective pulse width" the fuel table I cannot modify it if this is set to 1 ms. in the picture I have the current settings. I use the modeled table. if I set it with different values it works correctly. can it cause problems? Not really sure what you are asking here, but it would be unusual to have a min eff PW of 1ms. 0.4-0.6ms would be more typical values. With a min PW of 1ms you will likely never be able to achieve your desired air fuel ratio at idle. massimo forza 1 Quote Link to comment Share on other sites More sharing options...
massimo forza Posted October 3, 2021 Author Report Share Posted October 3, 2021 hello adamw thanks for your reply! I really appreciate. I tried as you said, at 0.5ms it works, I can adjust the carburetion to the minimum. which I couldn't do before. I have a doubt that I cannot answer, what happens if I change the value from 1ms to 0.5ms? in the specifications of the 1ms bosch EV14 injector as a value. I do not understand why. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 3, 2021 Report Share Posted October 3, 2021 I think you are confusing Actual pulse width with Effective pulse width. Actual pulse width is the length of the electrical signal from the ECU to the injector. Effective pulse width is the length of time fuel is flowing for. Effective PW = Actual PW - Dead time. Quote Link to comment Share on other sites More sharing options...
massimo forza Posted October 7, 2021 Author Report Share Posted October 7, 2021 la calibrazione del minimo ora funziona. solo che la tabella carburanti VE viene corretta con i numeri più grandi al minimo (esempio da 58 a 60) mentre un pieno carico devo diminuirli piuttosto che aumentarli (esempio a 1.4 bar mi ritrovo 48) nei video ho sempre visto che i valori aumentano. per esempio nei corsi dell'accademia HP. la pressione benzina letta dal sensore al minimo è 130kpa ma dovrebbe essere 300kpa. forse un'impostazione sbagliata del sensore? Ho la tensione minima a 0,5 e massima 4,5 come scritto sulla scheda tecnica del sensore Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 7, 2021 Report Share Posted October 7, 2021 17 minutes ago, massimo forza said: la pressione benzina letta dal sensore al minimo è 130kpa ma dovrebbe essere 300kpa. forse un'impostazione sbagliata del sensore? Ho la tensione minima a 0,5 e massima 4,5 come scritto sulla scheda tecnica del sensore Yes that would suggest there is an issue with your fuel pressure calibration or perhaps the regulator. VE numbers will not always increase with boost, once you are at WOT they will usually stay much the same regardless of boost, but generally you will have the largest VE numbers around peak torque 100-110% around say 5000RPM. massimo forza 1 Quote Link to comment Share on other sites More sharing options...
massimo forza Posted October 7, 2021 Author Report Share Posted October 7, 2021 ok perfect, tomorrow I'll check the pressure with a pressure gauge. so if at least I have 30 for example at full load I will have 60 right? Quote Link to comment Share on other sites More sharing options...
massimo forza Posted October 8, 2021 Author Report Share Posted October 8, 2021 ok, today i try to setup the fuel pressure sensor and now is all more better. but i don't know why, when i push the pressure to 1.4 bar the engine light come on. at 1.2 is perfect. i see this error on the software. is possible i need to change the sensibility of the cas? thanks Quote Link to comment Share on other sites More sharing options...
massimo forza Posted October 8, 2021 Author Report Share Posted October 8, 2021 and another things, the dewell time for the audi R8 coli pack, someone have the value for the correct setup? Quote Link to comment Share on other sites More sharing options...
dx4picco Posted October 8, 2021 Report Share Posted October 8, 2021 Probably reaching maximum injector duty? This turns on CEL Quote Link to comment Share on other sites More sharing options...
Vaughan Posted October 11, 2021 Report Share Posted October 11, 2021 Need to see a PC Log and preferably a copy of your tune to see the reason for the CE Light Quote Link to comment Share on other sites More sharing options...
massimo forza Posted October 11, 2021 Author Report Share Posted October 11, 2021 Ok problem solved, i have change the dwelltime, for start i see online 1.8 14volt. But the car cut. Now i use 2,5 to 3 at 14volt. R8 coil for the engine light i have gp1 limit rpm enter like error Quote Link to comment Share on other sites More sharing options...
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