Date: Wed, 09 Dec 1998 23:30:48 -0800 From: Justin VanAbrahams <jvanabranopsamnet> Subject: Re: Fuel Injector Differences
thomashi wrote: > > I have an '87 900 turbo. I am replacing a fuel injector and I received a > used one that is slightly different from the one that is installed. The > nozzle of the old one is metal as compared to the used one which appears to > be ceramic. Also, the old one is about a quarter of an inch longer than the > used one. That alone tells me I have the wrong replacement (Besides the > part numbers). Just curious as to what model the shorter one is for. > > The part number is the installed one is 741 > 280 > 150 712 > > The used part number is 541 > 280 > 150 706 > > Tom You have two different generations of injectors. The metal "tip" is just a heatshield. Only a couple years of the 16v engine used them. The other injector also has a heatshield (the "ceramic" part) but it's less pronounced. The metal shielded ones are not as good in terms of performance due to their restricted outlet, but it's not something you'd notice. Furthermore, chances are you *could* mix the two types of injectors and not notice any difference, but as a general rule it's not a good idea to mix injector types. -Justin
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