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Injector cleaning. Who needs it? (Read 4916 times)

jocke YaBB Newbies Offline I Love YaBB 2! Posts: 35	Injector cleaning. Who needs it? 11/29/09 at 10:08:54 I just received my injectors from cleaning. The bike is a 1991 Ducati 851 with IW031 injectors. Same injectros as a lot of Moto Guppis are using. Check out the flow before and after and it might give you some thing to think about if you are going to start mapping from scratch. Clean before mapping!!!!!!!!!!!!!! Jocke.........
Back to top	« Last Edit: 11/29/09 at 10:24:26 by jocke » Ducati 851/996 Ducati S4/984 Ducati MHR 900 www.virdung.net IP Logged

john in leeds YaBB Newbies Offline Guzzi and Highland Posts: 13 Yorkshire, UK	Re: Injector cleaning. Who needs it? Reply #1 - 11/30/09 at 23:45:36 Hi Jocke, A really good heads up - built in error of round 5%. I assume these injectors have never been cleaned or replaced. If so it's good to know that they can be bought back to good order by cleaning after 18 years.
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greenmonster Full Member Offline Sweden Posts: 196	Re: Injector cleaning. Who needs it? Reply #2 - 12/01/09 at 00:24:57 Good report! Glad I did mine before starting w MyECU.
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raz Senior Member Offline Guzzi 11OO Sport, My16MkV, Innovate LC-1 Posts: 373 Stockholm, Sweden Gender:	Re: Injector cleaning. Who needs it? Reply #3 - 12/01/09 at 02:41:11 Am I just cynical or is it not a tad suspicious that both injectors are reported as exactly the nominal value after cleaning? Anyway, it makes me wanna send mine away and have a deadtime table made while at it.
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jocke

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Re: Injector cleaning. Who needs it?
Reply #4 - 12/01/09 at 18:04:51

raz wrote on 12/01/09 at 02:41:11:

Am I just cynical or is it not a tad suspicious that both injectors are reported as exactly the nominal value after cleaning? Anyway, it makes me wanna send mine away and have a deadtime table made while at it.

Yes it looks a bit to good but I think that the values might be correct. The static flow of an injector is a very good way of checking if an injector is clean. All injectors have a very simular flow rate when they are new or clean. Tested staticly that is. Normaly within 1% or better so so I think that it could maybe be a correct value.

What it does not tell you is the values at "dynamic flow". Here is a very good article from Doug Lofgren that tells a lot why matching injectors are important.

http://www.visi.com/~moperfserv/Injectors.mht

Jocke..........

Ducati 851/996
Ducati S4/984
Ducati MHR 900

www.virdung.net

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