Anthony Parle Posted March 8, 2017 Report Share Posted March 8, 2017 I need to control variable ram intakes based on rpm. Can I use a GP PWM output and can I change it based on RPMECU is G+ Thunder Quote Link to comment Share on other sites More sharing options...
Brad Burnett Posted March 8, 2017 Report Share Posted March 8, 2017 Are you using both dbws on the thunder? If not you could use the spare dbw controls for the actuator and put a position sensor on the shaft. Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 9, 2017 Report Share Posted March 9, 2017 I need to control variable ram intakes based on rpm. Can I use a GP PWM output and can I change it based on RPMECU is G+ ThunderYes you can do PWM controlled by a 2D or 3D table. Are you sure you need PWM though? Most servo or motor type actuators would need push/pull. Quote Link to comment Share on other sites More sharing options...
Anthony Parle Posted March 9, 2017 Author Report Share Posted March 9, 2017 Hi Guys,I am open to the best way to do it, I am using one PWM on the idle (if I understand correctly) its a Subaru motor, so the other is spare so feed back would be good,Is there any other options? Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 9, 2017 Report Share Posted March 9, 2017 You have 8 Aux outputs that can do GP PWM. What type of device drives this variable intake - Solenoid, DC motor, stepper motor??? Quote Link to comment Share on other sites More sharing options...
Anthony Parle Posted March 9, 2017 Author Report Share Posted March 9, 2017 I have two concepts in mind,One is just a 1 shoot Solenoid but would need to occur at the same time in relation to the piston and intake, Just not sure how I could do that unless I use the injector timing and run them batch unless you guys can tell me how I can do it.The second I would guess would be a DC motor but I need some way to feed back as Brad mentioned. Quote Link to comment Share on other sites More sharing options...
Brad Burnett Posted March 9, 2017 Report Share Posted March 9, 2017 Are you trying to use the tumble generating valves in the intake manifold runners for something fancy?I do tons of subarus and most of the time we just delete the TGVs.But the ecus do have provisions for TGV control. Quote Link to comment Share on other sites More sharing options...
Anthony Parle Posted March 9, 2017 Author Report Share Posted March 9, 2017 Hi Brad,No, my engine is a EG33 no valve I also have machined the centre out of the manifold and fitted twin snorkles. Now I am working on a set of individual throttle bodies and as part of that I will either adjust there length as revs change or use a new idea on each cylinder. Do you know if on the Thunder I could install it on a 4 cylinder and have two different injector timing maps etc. I could use the first 4 for the actual injectors and the last 4 to control the valves on each head?Thanks for your help. Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 10, 2017 Report Share Posted March 10, 2017 Do you know if on the Thunder I could install it on a 4 cylinder and have two different injector timing maps etc. I could use the first 4 for the actual injectors and the last 4 to control the valves on each head?We dont have a separate timing map for the secondary injectors at the moment. Now I am working on a set of individual throttle bodies and as part of that I will either adjust there length as revs change or use a new idea on each cylinder.How about use an RC servo, like this type of thing: https://www.pololu.com/product/1057. You would need to give it a separate power supply since most can only take 5V but a PWM aux out will control its position. I've never used one but in theory it should work. If you use a 100Hz PWM, then 10%DC will give you full anticlockwise, 15% will be centered, 20% will give you full clockwise. Davidv 1 Quote Link to comment Share on other sites More sharing options...
Anthony Parle Posted March 10, 2017 Author Report Share Posted March 10, 2017 That sounds like a plan Adam, I will give it a try,I used one on my engine dyno to drive the throttle. Quote Link to comment Share on other sites More sharing options...
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