PTE 680cc Injectors??

[90AWDTalon]

The injectors will have a # written in small gray boxy text. Post that # here and I will look at our injector sheet and verify which ones they are tomorrow.

I bought a set of 680's about a year and a half ago, they appear to be 780's based on my eprom tuning. Just wondering if you could check to see if they are listed as 680's or 780's on your sheet? Thanks.

11158/210233
13158/210233
16158/210233
13458/210233

 

[gasguzzler]

Mike,

The injectors you have are the 680's, not the 780's, and that is a flow matched set

If a box of say 65 lb. injectors comes in, not all injectors will flow exactly 65 lbs. Some will flow something like 63 lb. and some 67 lbs. (just as an example). Now let's convert this to CC's, multiply that lbs rating by 10.2 (I believe that's the industry standard) and you have 663cc with the 63lb. injector and 683cc with the 67lb. injector. There's a difference of 20cc in this example, now if you had a box of injectors like this would you call them 660's or 680's? The most important thing is that each set is flow matched so that you don't have 680cc injectors in three cyl. and a 660cc in the last one.

- Brian

 

[90AWDTalon]

Mike,

The injectors you have are the 680's, not the 780's, and that is a flow matched set

If a box of say 65 lb. injectors comes in, not all injectors will flow exactly 65 lbs. Some will flow something like 63 lb. and some 67 lbs. (just as an example). Now let's convert this to CC's, multiply that lbs rating by 10.2 (I believe that's the industry standard) and you have 663cc with the 63lb. injector and 683cc with the 67lb. injector. There's a difference of 20cc in this example, now if you had a box of injectors like this would you call them 660's or 680's? The most important thing is that each set is flow matched so that you don't have 680cc injectors in three cyl. and a 660cc in the last one.

- Brian

Thank you.

Thats very interesting, I'm positive they are 780's. I'm running 49psi base fuel pressure, at that pressure it works out to 827cc. My base setting on my eprom chip is 828cc. My fuel trims are low 112, mid 96, and high 106. And the car runs great at these settings. I don't see how there is any way these are really 680's. I don't know how they do there testing or serial number listing so I don't know how this happened, I'm definately not complaining, I feel lucky to have gotten what I did.

I've heard of this happening to one other person with 680's.

 

[Savage Talon]

I have Denso 660's and a key diver chip. My MAFT is set dead on as if they were 450's.

 

[90AWDTalon]

I have Denso 660's and a key diver chip. My MAFT is set dead on as if they were 450's.

Because your chip is set for 660's.