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injectors
- Thread starter 2 live
- Start date
rite well ive got two sets of greys sat on fuel rails in fron t of me...and a green set in the willy
basically the grey ones...1 set from a megane, 1 set from a volvo 440 turbo(i think), the grye 1s off the megane i presume are bosch but the 1s off the volvo are siemens, the megane ones have 4 jets in the end of em , the volvo ones 2
i was jus wunderin if any of these would be an improvement on the green ones i have in the willy at the mo
ITB Hybrid+Cup+Scenic II
The megane injectors run with a different impedance than the Willy ones I think?!
Michael
Like i said, you cant tell anything about an injector from its colour, you need the part number to look up the flow rate and operating impedance. The colours for the cossie rance have confused alot of people, but you can get loads of different flowing injectors from bosch which are green, grey, blue, light green, gold, yellow, blah blah blah.
2live, impedance describes the injector coil operating ohms. Low imp injecotors only need about 2-6 ohms to open the injector, and high need about 16ohms. If you use a if your going to use a low imp in a high system you need a resistor on the earth line to the injector driver.
the clio 16V/willy and F7R meg use low imp injectors.
buddy, changing injectors will change the amount of fuel injected, and unless you have modified the engine so that more air is aspirated, i dont see the advantage of going to a higher flow rate. the cossie has a turbocharger, and the amount of air induced can be changed considerably, while in a NA engine usually changes are not so dramatic. injector must be changed only in npresence of large power gains, where the stock injectors reach the max duty cycle. missing other mods or remapping the ECU, fitting larger injectors will only flood the engine, which might not work at all.
Quote: Originally posted by Paul.C 16v on 08 March 2004
my mate has grren on his cossie and he is running 350bhp and he said to get it over 400bhp he would need greys. so i would say grays have a higher flow. Paul
hehe but i have tuned my car to require maybe not loads more but def a bit more fuellin .......which is why im askin lol
cheers ben cleared that up a bit for me.............the part no.s.....gess u know the no.s for green willy 1s. the grey megane 1s .....if the no.s are on the side of the plastic casin, they r 0280155724........but also have the no.s 664 and 060/090 c on em.
they have 4 holes in the end of the injectors (i believe the willy 1s only have 1, not sure tho not really looked)which i would presume gives a greater area of mix spread
any help appreciated
incorrect, but a common mistake so no worries. When you map, it is impossible really to flood the engine just because you are using an injector with an overly high flow rate. Since all you have to do is just open and close the injector for a shorter time, and you specify this when mapping, or the ECU will control this when running closed loop.
What you will get is poor idle control if the injector flow rate is too high because the ECU cant open and close the injecotr coil fast enough. And when running at higher rpms, you get poor mixture represetation, where the injector only has to open of for a shorter period compared to the lower flow injectors. So the mass of air flowing into the cylinder, only a proortion of it picks up fuel as it passes, and due to the position of the injector there isnt enough distace for it all to mix anywhere near evenly. This leads to lean spots and poor combustion, detonation in servere cases.
Ideally you should use an injector where your operating between 20% and 80% of its max.
hi
i tend to disagree. closed loop, at least in some ECUs i know (im not too familiar with the strategy of clios ecus) has a limited range of closed loop correction. if the maps are wrong by say 100% or injectgor flow increased too much, i doubt closed loop will have the capability or speed to correct a mixture so largely wrong. also, some ecus will disable closed loop in certain map areas, like WOT for instance, where running very lean is not advisable
on top of that, i suppose that with a much larger flow rate the engine wont start because of cranking enrichment and cold start, which would probably lead to a flooded engine
[/QUOTE]incorrect, but a common mistake so no worries. When you map, it is impossible really to flood the engine just because you are using an injector with an overly high flow rate. Since all you have to do is just open and close the injector for a shorter time, and you specify this when mapping, or the ECU will control this when running closed loop. What you will get is poor idle control if the injector flow rate is too high because the ECU cant open and close the injecotr coil fast enough. And when running at higher rpms, you get poor mixture represetation, where the injector only has to open of for a shorter period compared to the lower flow injectors. So the mass of air flowing into the cylinder, only a proortion of it picks up fuel as it passes, and due to the position of the injector there isnt enough distace for it all to mix anywhere near evenly. This leads to lean spots and poor combustion, detonation in servere cases. Ideally you should use an injector where your operating between 20% and 80% of its max.
[/QUOTE]
incorrect, but a common mistake so no worries. When you map, it is impossible really to flood the engine just because you are using an injector with an overly high flow rate. Since all you have to do is just open and close the injector for a shorter time, and you specify this when mapping, or the ECU will control this when running closed loop.
What you will get is poor idle control if the injector flow rate is too high because the ECU cant open and close the injecotr coil fast enough. And when running at higher rpms, you get poor mixture represetation, where the injector only has to open of for a shorter period compared to the lower flow injectors. So the mass of air flowing into the cylinder, only a proortion of it picks up fuel as it passes, and due to the position of the injector there isnt enough distace for it all to mix anywhere near evenly. This leads to lean spots and poor combustion, detonation in servere cases.
Ideally you should use an injector where your operating between 20% and 80% of its max.
[/QUOTE]
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