hgray14 Posted October 20, 2011 Report Share Posted October 20, 2011 What do the various colors of fuel injectors mean? Will I notice a considerable difference in fuel efficiency if I switch up from my stock 1995 Turbo injectors to the next higher flowing color? thanks Houston Link to comment Share on other sites More sharing options...
Burn-E Posted October 20, 2011 Report Share Posted October 20, 2011 Read the pinned thread in the performance forum. It's titled Modifying Turbo Volvos. Link to comment Share on other sites More sharing options...
hgray14 Posted October 21, 2011 Author Report Share Posted October 21, 2011 Cool, thanks. I looked everywhere for that but didn't know that was the title of the thread. Link to comment Share on other sites More sharing options...
FCP Euro Posted October 21, 2011 Report Share Posted October 21, 2011 You would only need them if you were running a good amount of more boost. If you are not changing the boost level, I would just leave it alone. Link to comment Share on other sites More sharing options...
hgray14 Posted October 22, 2011 Author Report Share Posted October 22, 2011 I am running the IPD ECU, with exhaust. Is there any gain at all by upgrading fuel injectors or do the ones I have give plenty of fuel to handle the extra power the ECU is asking for? Link to comment Share on other sites More sharing options...
Yellow95 Posted October 24, 2011 Report Share Posted October 24, 2011 No gain with your mods. Dont waste the money. Buy beer. Send me a couple. Gary Link to comment Share on other sites More sharing options...
OptimusGlen Posted October 25, 2011 Report Share Posted October 25, 2011 another question along the same lines... In one of my 850's I have reason to believe one of the stock orange injectors is acting up. I also have a full set of white injectors just laying around. Plan is to clean up the whites and install them. Not looking for gains really, just want non-malfunctioning parts. I assume the ECU can adapt to these, but then again I'm fairly new to Volvo. Back in the VW and BMW world it wouldn't have been an issue. Also, quoting from the sticky thread in the performance section, as mentioned above. The first upgrade to consider in the fuel system would be the <b>injectors</b>, which stock are 315cc/min as I recall. A general rule of thumb on our engines with stock fuel pressure is that for each cc/min of injector size, you can achieve about 1 bhp. So with 315cc/min injectors you can achieve about 315 bhp, or 260-280 whp. There are Bosch-made Volvo injectors which are a direct replacement for the 850's stock orange top injectors. The 70-series T5 cars in 1998 received white injectors which flow roughly 350cc/min. In 1999, all 70 series T5 cars received blue 395cc injectors, which were original equipment on those models for quite a few years. In 2000, the V70R AWD received green 468cc/min injectors, which resurfaced again in 2004 when the R AWD V70 and S60 were introduced. A quick and easy way to up effective injector flow is to put in a Dodge 4-bar fuel pressure regulator from a 2.2 liter turbo Dodge (from the late 80s, early 90s). Which gives an increase in flow over our 3 bar. Stock 850 Turbo (orange) - 315cc/min Stock S/V70 1998 (white) - 350cc/min Stock S/V70 1999 (blue) - 395cc/min Stock V70R 2000, 2004 and S60 (green) - 468cc/min Link to comment Share on other sites More sharing options...
the commissar! Posted October 25, 2011 Report Share Posted October 25, 2011 ...But you have to remember that you need a certain balance between air and fuel...if you up the pressure and add higher flowing injectors, the ECU is still firing at the same pulse width until it senses that it is being over fueled then it will back off until it reaches its pre-programmed target OR it hits its wall (+/- 20% LTFT iirc). A small change the ECU may handle long term but not a big one... Bottom line is if you do not have a tune that is designed to work WITH the injectors and pressure regulator, you are pissing in the wind and creating problems for yourself. Link to comment Share on other sites More sharing options...
hgray14 Posted October 29, 2011 Author Report Share Posted October 29, 2011 I always forget that pissing in the wind is a bad idea until it is too late... Link to comment Share on other sites More sharing options...
bergmjs Posted October 29, 2011 Report Share Posted October 29, 2011 Remember whites and blues flow the exact same, the blue number is just what they flow at a higher pressure. Link to comment Share on other sites More sharing options...
Guest Ben850 Posted November 2, 2011 Report Share Posted November 2, 2011 While at the parts yard yesterday I pulled the fuel rail from a '96 850 to bring home because it was cheap and easy. The injectors are yellow and I was wondering if anyone knows if they would be ok to put in my '93 n/a 2.4 20v. It was a spur of the moment thing because there are some slight leaks from my present fuel rail and I saw an easy fix. Link to comment Share on other sites More sharing options...
Ben850 Posted November 2, 2011 Report Share Posted November 2, 2011 While at the parts yard yesterday I pulled the fuel rail from a '96 850 to bring home because it was cheap and easy. The injectors are yellow and I was wondering if anyone knows if they would be ok to put in my '93 n/a 2.4 20v. It was a spur of the moment thing because there are some slight leaks from my present fuel rail and I saw an easy fix. Sorry I noticed I did't sign in, I'm not a guest. Link to comment Share on other sites More sharing options...
850wagonT5 Posted November 3, 2011 Report Share Posted November 3, 2011 Remember whites and blues flow the exact same, the blue number is just what they flow at a higher pressure. ^ This. White and blue are interchangeable. That said...at 18psi on the 15G with a full 3" exhaust, I was not leaning out yet on the stock orange top injectors. It's possible I was at the limit of their duty cycle though. Since there's no point boosting more than 18psi on a stock turbo anyway, that leads me to believe that (for the most part) if you're still on a stock turbo, you don't really need bigger injectors. However, if you plan to run more than 18psi, modify the head or add aftermarket cams, or plan to run a larger turbo in the future (18 or 19T, etc), then you may want to opt for larger injectors so there's room to grow into them. Link to comment Share on other sites More sharing options...
Yellow95 Posted November 3, 2011 Report Share Posted November 3, 2011 I ran 18lbs for years on a 95 850 with orange injectors and an 18T turbo with a MBC. You will have no issue. Link to comment Share on other sites More sharing options...
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