Cadillac HT4100 injector flow rate?

[jwvess00]

Years ago, I sent some TBI injectors from 4.3 TBIs I had pulled from a couple of S10 trucks and S10 Blazers to a shop to have the injectors cleaned. One set came back fine, but the other set, I was told, was actually for a 305 (apparently someone swapped them at some point). The shop had some good HT4100 injectors on the shelf, and since I was using these with a 3.4V6 Camaro engine in a TBI-swapped '84 S10 Blazer, the shop thought it would be a reasonable match. It was -- it runs okay but I've never datalogged it. This '84 S10 Blazer was my father's at the time, and I never got around to doing any fine-tuning on it until now.

My initial goal is to just adjust the injector constant to match the displacement and injector size, but I can't find any flow data on the HT4100 TBI injectors. Any ideas? Thanks!

[1project2many]

Hello,

I don't remember ever seeing ratings for those injectors. I'm not aware of a tuning definition to allow one to see the BPW constant, either. Maybe you could use block learn and integrator to make a correction to the BPW constant?