Kev.O Posted September 26, 2007 Share Posted September 26, 2007 I was wondering if anyone would have a rough idea of the duty cycle of my siemen 720's whilst running a GT4088? I'm going to be getting an aquamist system and need to work out the size of the jets I need. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted September 26, 2007 Share Posted September 26, 2007 Err?? duty cycle will be anything between 0-100% depending on what the map in the ECU tells them, are you thinking of lag time? Quote Link to comment Share on other sites More sharing options...
uk-rich Posted September 26, 2007 Share Posted September 26, 2007 how is the aquamist being activated ? boost switch Quote Link to comment Share on other sites More sharing options...
Kev.O Posted September 26, 2007 Author Share Posted September 26, 2007 Err?? duty cycle will be anything between 0-100% depending on what the map in the ECU tells them, are you thinking of lag time? Richard asked me what the duty cycle will be, and as I didn't know I said I would find out. He said that he doubts I'll be running the injectors at 100%. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted September 26, 2007 Author Share Posted September 26, 2007 how is the aquamist being activated ? boost switch Not the one I'm looking at (HS-5 same as Lui). It duplicates the injector signal from the ECU, or something like that Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted September 26, 2007 Share Posted September 26, 2007 Ahh right, you need to add them all together and IFAIKR multiply the total by 10%-15% , you will also be better of dividing the required jet size in two, as you will get better atomisation. http://www.imagestation.com/picture/sraid215/pd412cc22545ed47f6a61f4bc7b65262e/eceb69be.jpg Oh! and ideally if you have sized the fuel injectors right then you should not see more than 85% DC. Quote Link to comment Share on other sites More sharing options...
uk-rich Posted September 26, 2007 Share Posted September 26, 2007 i am running the 1mm jet, i tested the nozzle into a bucket and the atomisation is fine Quote Link to comment Share on other sites More sharing options...
Kev.O Posted September 26, 2007 Author Share Posted September 26, 2007 Richard recommended using 2 jets. Thanks Dick Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted September 26, 2007 Share Posted September 26, 2007 i am running the 1mm jet, i tested the nozzle into a bucket and the atomisation is fine Try comparing the result with a 0.5MM jet then you will see what i mean;) Quote Link to comment Share on other sites More sharing options...
Kev.O Posted October 22, 2007 Author Share Posted October 22, 2007 Ahh right, you need to add them all together and IFAIKR multiply the total by 10%-15% , you will also be better of dividing the required jet size in two, as you will get better atomisation. http://www.imagestation.com/picture/sraid215/pd412cc22545ed47f6a61f4bc7b65262e/eceb69be.jpg Oh! and ideally if you have sized the fuel injectors right then you should not see more than 85% DC. So total at 10% is 432 and at 15% is 648. I'm a little uncertain what these figures mean Could someone pleasae tell me what size injectors I need. Quote Link to comment Share on other sites More sharing options...
uk-rich Posted December 3, 2007 Share Posted December 3, 2007 i spoke to richard L today about the two nozzle's being better than one, he said as long as you have the nozzle some distance from the throttle there is no need saves me taking my headlight out again Quote Link to comment Share on other sites More sharing options...
Kev.O Posted December 3, 2007 Author Share Posted December 3, 2007 i spoke to richard L today about the two nozzle's being better than one, he said as long as you have the nozzle some distance from the throttle there is no need saves me taking my headlight out again Did Richard happen to say what the optimum distance from the T/B was? Quote Link to comment Share on other sites More sharing options...
uk-rich Posted December 3, 2007 Share Posted December 3, 2007 i mentioned where i have got mine and ne said thats about right (exit of fmic) which is about 2'-3' from the throttle body in your case kev, i would locate it somwhere around the passenger head light (as you are running a side mount its a fare old way away) Quote Link to comment Share on other sites More sharing options...
Wez Posted December 3, 2007 Share Posted December 3, 2007 I read on the aquamist forums that close to TB gives better cylinder cooling, further away provides better charge cooling, it has more time to cool the air. You could use two 0.5mm jets at different locations if you wanted, I have a single 0.7mm in mine right infront of the throttle, I noticed a nice drop in EGT and the mixture read leaner due to more O2, this was from my AEM datalogs. If you are working off a pressure switch and have no way of regulating the amount that is injected dont go for the size rated at full boost, if you are injecting at 1bar then work out whats needed from there up. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 3, 2007 Share Posted December 3, 2007 Thats what I'm using one 5mm at the IC outlet and one 5mm about 12" before the throttle, but i use my EMU to map the duty cycle, which reminds me to report back to Richard on the results, but i haven't been using the car much recently so don't have much data. Quote Link to comment Share on other sites More sharing options...
Wez Posted December 3, 2007 Share Posted December 3, 2007 What are the results then? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 3, 2007 Share Posted December 3, 2007 What are the results then? Nothing conclusive at the moment, when i first fitted the extra jet, i had mapping problems, i then went straight into the kit fitting and respray, and while i was doing that i put in some bigger injectors, which i am still dialling in, so not had a chance to take any temp data logs that that would make any sense, as everything else is out of whack, plus winter has come along, so i need to take some baseline temp logs first. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted May 4, 2009 Author Share Posted May 4, 2009 Thought I'd post in here rather than start a new thread. I realise I need to fit a restrictor pill, but unsure as to what size, plus I can't find any of them at the moment. I'm using a 0.8mm jet. The calculations are: 720x0.8x6=3456 then x 10% gives me 345, which is why I've gone for a 0.8mm jet. Can anyone advise me on what size restrictor I should use please. Thanks. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 4, 2009 Share Posted May 4, 2009 "restrict or pill" not sure what you're referring to Kev? Quote Link to comment Share on other sites More sharing options...
Kev.O Posted May 4, 2009 Author Share Posted May 4, 2009 "restrict or pill" not sure what you're referring to Kev? I've googled what it was and the guys on the evo site called it a pill It's the flow restrictor that goes in the 6mm pipe between the pump and the HSV. Well it actually fits in the end of the HSV. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 4, 2009 Share Posted May 4, 2009 I've googled what it was and the guys on the evo site called it a pill It's the flow restrictor that goes in the 6mm pipe between the pump and the HSV. Well it actually fits in the end of the HSV. I'm afraid i haven't heard of this, or used it, what is the reason for one? why would you want to restrict the flow,wouldn't that defeat the object. Its preferred to have an accumulator after the pump to avoid flow variation, the whole system relies on high pressure and good flow rate to achieve a constant injection rate? Quote Link to comment Share on other sites More sharing options...
Kev.O Posted May 4, 2009 Author Share Posted May 4, 2009 I'm afraid i haven't heard of this, or used it, what is the reason for one? why would you want to restrict the flow,wouldn't that defeat the object. Its preferred to have an accumulator after the pump to avoid flow variation, the whole system relies on high pressure and good flow rate to achieve a constant injection rate? I'm honestly not sure, and this could be the reason why I can't find them ie I never had them. I can just remember thinking to myself that I needed to fit the restrictor, but didn't know at the time which one to fit. Quote Link to comment Share on other sites More sharing options...
Wez Posted May 4, 2009 Share Posted May 4, 2009 I have heard of restrictors and yes pills being used in pressure lines upto wastegate solenoids but not on anything else. From memory Mitsi EVOs use pills in the boost control lines. Quote Link to comment Share on other sites More sharing options...
Kev.O Posted May 4, 2009 Author Share Posted May 4, 2009 Right found the thread where I read it. I realise this is based on an install on an Evo IX but the equipment is still the same. Check out page 27 of 35: Install Guide Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 4, 2009 Share Posted May 4, 2009 Right found the thread where I read it. I realise this is based on an install on an Evo IX but the equipment is still the same. Check out page 27 of 35: Install Guide Had a quick read, but i couldn't find anything that explained why its used, as i said, cant see a reason for it, have to ask Richard for an explanation. Quote Link to comment Share on other sites More sharing options...
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