Incognito G Posted September 18, 2009 Report Share Posted September 18, 2009 Hi Everyone, Does anyone know the correct dead time for these injectors? I have used the Bosch 846 in the calibration table but idle is rough (even after tuning) and when revving the engine it doesn't run as smooth as the current MSD 65# its using. Would it be good to run a Walbro 255 HO in-tank and 2 Bosch External after the filter to increase flow through the system? At 10 Psi on a GT30R I am already at 50% DC on E85 which makes me require either a 1600cc injector, an upgrade fuel system or use the 1600cc as an auxillary injector. Your suggestions are well appreciated. Quote Link to comment Share on other sites More sharing options...
martin battye Posted September 21, 2009 Report Share Posted September 21, 2009 atomisation may be poor at lower DC's with the 1600cc.. i always tune inj after the tune is complete by removing alt fuse and stabilising af's at idle with lag times as batt v decreases.. you can extrapolate the higher v from this curve semi accuratly.. seems like you have fuel delivery problems there.. Quote Link to comment Share on other sites More sharing options...
Incognito G Posted September 22, 2009 Author Report Share Posted September 22, 2009 I guess I cannot go with the Bosch then. Do you think dual bosch external pumps coupled with one intank walbro can help increase flow? Do lag times also increase flow? I noticed that the lag times I used for the MSD in my Haltech could do 95% DC but when I switched to Link G4 the car would not run good after 80% DC. Lagtime in the Haltech was .4msec (injectors wired directly to ecu which can control low z injecctors) and in the Link it was .5msec (injectors wired with resistor packs) Quote Link to comment Share on other sites More sharing options...
martin battye Posted October 12, 2009 Report Share Posted October 12, 2009 perhaps the inj crive is clipping?? what Z are your inj circuits?? is your pressure regulator referencing to boost properly?? whats your base pressure? try not to fuss about the lag times too much at the minute... you say doesnt run well after 80%dc. how do you mean? could be injection timing? Quote Link to comment Share on other sites More sharing options...
martin battye Posted October 12, 2009 Report Share Posted October 12, 2009 *inj drive Quote Link to comment Share on other sites More sharing options...
Incognito G Posted October 19, 2009 Author Report Share Posted October 19, 2009 Thank You. I am using 340 degrees as the injection angle. Any suggestions? Base pressure is at 43 PSI Regulator is stock FPR and is 1:1 Injectors are Low Z and I'm using OEM Injector Ballasts Quote Link to comment Share on other sites More sharing options...
martin battye Posted November 1, 2009 Report Share Posted November 1, 2009 try to run the car again and swing the closing point angle further on towards 400deg. so what happens.. perhaps take some logs also Quote Link to comment Share on other sites More sharing options...
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