I don't know if this is really bad luck or something I'm dong wrong. I have purchased several sets of Ebay early truck style injectors with poor results. every set I throw on ends up leaking down and causing long crank times. even bought real Delco ones and they do it. I throw the stock 20yo injectors back on and it starts instantly. Switched to some LS1 style 36lb injectors thinking maybe they are better quality and having the same issue with long crank times. runs great otherwise just cant dial in the starting problem.
is there something I'm missing here ?
Excuse the tune its a work in progress.
I have been doing ultrasonic cleaning and flow testing of fuel injectors for almost 3 years now and have not seen anything promising at all out of any of the Ebay injectors. Most seem to be replicas of very poor quality. Where did you get the Delco ones from? I have seen a bunch on Ebay that are listed as "REAL OEM QUALITY DELCO INJECTORS" and then when you read the description they are chinese copies of the delco but are "tested to oem standards" (I.E. they are junk)...
The box said they were made in Germany and the seller didn't seem surprised when I sent them back for a refund. Does anyone have tune with 36lb injector data ? not sure if what I'm using is correct. Where is a good place to purchase a set ?
VCM Editor >Tools> Unit conversion. 36lb/hr @ 43.5psi (aftermarket rated) new pressure LS standard 58psi = 41.57 To find your flow rate multiplier, new injector flow rate 41.57 / 34? Current stock flow rate? (but in my files a 2002 Tahoe is 33# across the Injector flow vs KPA Vac ) = multiplier of 1.223 Now multiply whole table by 1.223. Now unless your pressure is different or there is a different stock injector flow table you will keep the scaled flow rate increase for those 36# injectors.
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