The MegaSquirt Project has experienced explosive growth other the years, with hundreds of new MS installations occurring every week - a phenomenal success! MegaSquirt has been successfully used in all aspects of Internal Combustion engine applications including R&D, Industry, Race, and Research. The MS project has transformed itself from a simple R&D project into a full-featured mature engine control system. To reflect this the support structure has also changed to meet the needs of MegaSquirt Users.
Moving forward, the R&D forums for MegaSquirt project are in a read-only mode - no new forum posts are accepted.
However the forums will remain available for view, they still contain a wealth of information on how MegaSquirt works, how it is installed and used. Feel free to search the forums for information, facts, and overview.While the R&D forum traffic has slowed in recent years, this is not at all a reflection of Megasquirt users, which continue to grow year after year. What has changed is that the method of MegaSquirt support today has rapidly moved to Facebook, this is where the vast majority of interaction is happening now. For those not on Facebook the msextra forums is another place for product support. Finally, for product selection assistance, all of the MegaSquirt vendors are there to help you select a system, along with all of the required pieces to make it complete.
Forum rules
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
MS2/V3. I'm using a 1ms open time and 25% PWM. I don't think I have changed that for 150 miles or so.
Hmmm, could it be that the Delphi spec of
Driver 4/1 P&H
for the TBI700 inectors means Peak & Hold with a 4:1 ratio? That would imply that a 25% PWM would be correct for this injector. The question that would remain is how long should the initial pulse be?
It would be interesting to put one of these injectors on a scope and see how long it takes to saturate the coil with a 14V feed. I would think that you want the initial pulse to be slightly less than the time required to saturate the coil (assuming that time is less than 1ms). Once the coil saturates, the current would rise dramatically unless the voltage is dropped (via a 25% PWM), with no increase to the magnetic field to open the injector any faster.
MS2/V3. I'm using a 1ms open time and 25% PWM. I don't think I have changed that for 150 miles or so.
Hmmm, could it be that the Delphi spec of
Driver 4/1 P&H
for the TBI700 inectors means Peak & Hold with a 4:1 ratio? That would imply that a 25% PWM would be correct for this injector. The question that would remain is how long should the initial pulse be?
It would be interesting to put one of these injectors on a scope and see how long it takes to saturate the coil with a 14V feed. I would think that you want the initial pulse to be slightly less than the time required to saturate the coil (assuming that time is less than 1ms). Once the coil saturates, the current would rise dramatically unless the voltage is dropped (via a 25% PWM), with no increase to the magnetic field to open the injector any faster.
That is....kind of the point of Peak&Hold ?
Peugeot/Citroen XU5 BDZ(4cyl 1.6litre) engine with 60-2 VR wheel decoding singel coil and dizzy spark and Magneti Marelli(solex) TBI. Msns-E hi-res 0.08f and E85(Ethanol) in the gastank.
ftl wrote:Quote: MS2/V3. I'm using a 1ms open time and 25% PWM. I don't think I have changed that for 150 miles or so. Hmmm, could it be that the Delphi spec of Quote: Driver 4/1 P&H for the TBI700 inectors means Peak & Hold with a 4:1 ratio? That would imply that a 25% PWM would be correct for this injector. The question that would remain is how long should the initial pulse be? It would be interesting to put one of these injectors on a scope and see how long it takes to saturate the coil with a 14V feed. I would think that you want the initial pulse to be slightly less than the time required to saturate the coil (assuming that time is less than 1ms). Once the coil saturates, the current would rise dramatically unless the voltage is dropped (via a 25% PWM), with no increase to the magnetic field to open the injector any faster. That is....kind of the point of Peak&Hold ?
Peugeot/Citroen XU5 BDZ(4cyl 1.6litre) engine with 60-2 VR wheel decoding singel coil and dizzy spark and Magneti Marelli(solex) TBI. Msns-E hi-res 0.08f and E85(Ethanol) in the gastank.
Posted by email.
Peugeot/Citroen XU5 BDZ(4cyl 1.6litre) engine with 60-2 VR wheel decoding singel coil and dizzy spark and Magneti Marelli(solex) TBI. Msns-E hi-res 0.08f and E85(Ethanol) in the gastank.
ftl wrote:Quote: MS2/V3. I'm using a 1ms open time and 25% PWM. I don't think I have changed that for 150 miles or so. Hmmm, could it be that the Delphi spec of Quote: Driver 4/1 P&H for the TBI700 inectors means Peak & Hold with a 4:1 ratio? That would imply that a 25% PWM would be correct for this injector. The question that would remain is how long should the initial pulse be? It would be interesting to put one of these injectors on a scope and see how long it takes to saturate the coil with a 14V feed. I would think that you want the initial pulse to be slightly less than the time required to saturate the coil (assuming that time is less than 1ms). Once the coil saturates, the current would rise dramatically unless the voltage is dropped (via a 25% PWM), with no increase to the magnetic field to open the injector any faster. That is....kind of the point of Peak&Hold ?
Peugeot/Citroen XU5 BDZ(4cyl 1.6litre) engine with 60-2 VR wheel decoding singel coil and dizzy spark and Magneti Marelli(solex) TBI. Msns-E hi-res 0.08f and E85(Ethanol) in the gastank.
Posted by email.
Peugeot/Citroen XU5 BDZ(4cyl 1.6litre) engine with 60-2 VR wheel decoding singel coil and dizzy spark and Magneti Marelli(solex) TBI. Msns-E hi-res 0.08f and E85(Ethanol) in the gastank.