two of these are stock injectors two of them are ~800cc injectors. which is which? would me test their ohms help?

 

The ones on the right are most likely stock S5 injectors. The ones on the left look to be aftermarket.

 

i believe they are about 800cc injectors (they have denso on the side, anyway i can get more info on them?)

 

Beats me...

 

flow test them? idk

 

the red topped ones are high impedence and say denso 195500-2020

the black ones on the left say RP on the top then on the gray part the following is etched

57.9
22.4
10-24-01

the other one reads

57.8
24.7
10-24-01

both of those are low impedence (less than 2.5 ohms)

 

Hmm most after market injectors are low impedance right? Then I would put my money on the left ones being 800's and the ones on the right are S5 High impedance injectors.

If you get the part number off the side I bet you can google it.

If not you can also send them to Rich at Cruzin Performance. For $11 a piece he will clean and flow test them.

The test will show you the flow. I think it's the pounds rate.

My 550's did about 54.5-56 pounds or something.

 

yeah i think the red tops are definalty the s5 stockies

 

84-85 13B NT low square center 680cc orange 195500-0900
86-87 13B NT low square center 460cc red 195500-1350
86-87 13B T low square center 550cc tan 195500-1370
88 13B NT high square offset 460cc purple 195500-1350
88 13b T high square offset 550cc purple 195500-1370
89-91 13B NT high oval center 460cc red 195500-2010
89-91 13B T high oval center 550cc purple 195500-2020

 

the black ones ar made by bosch probably 24lbhr

 

i disagree...24lbhr is way to small

 

The black ones are probably 680s or 800's...they are sold often on ebay for stealths and dsm's. I think they're sold as PTE or some ****, but theyre available in all different sizes. Best thing to do is flow test them.

Get a measuring cup from walmart for a buck. It needs to read in mL which is the same as cc. Take the fuel line from your car, the supply line from the pump. Charge your battery so you get full voltage to the fuel pump. Take one fuel injector, slide it into your fuel line, and clamp it. Get a spare FI plug, and run those wires to your battery as well, but leave one unhooked. When you touch the other one to the battery, the injector will open, you dont want to do it yet. Now...get a stopwatch or anythign that shows seconds. Jumper the yellow test connector on the passengers side of your car, or otherwise supply power to the fuel pump. With the cup under the injector, simultaneously start the stopwatch (or note the secondhand of the watch) and open the injector. MEasure what comes out in 60 seconds. You have just flowed an injector, and the results are within 5% of total flow most of the time.

 

my s5 has 195500-0830 in one of the rails do any of you know what this is?

 

0830? Are they light blue/green? I think these are 720's..I have a set.

When in question, take them out and flow them. IT isnt that hard.

 

the 0830's are 720's from the cosmo engines i believe.

 

WHAT Cosmo engine?
I believe the RX-5 "vintage" Cosmo was not fuel injected.
The EC and JC Cosmos all ran 550's for fuel injectors.


-Ted

 

I just verified my 720s are 0830's. They are sky blue top, low impedance.

 

Actually you shouldn't do that. Holding them open that long will overheat the coil. Do it for 15 seconds and times the result by four to get cc/min. Better yet, get them cleaned and flowed by a pro.

The 82-88 HB Cosmo was injected. The 13B ran two 720cc/min injectors and the 12AT ran two 800cc/min injectors.