Gee I am going to need to replace them with garden hoses! I am having trouble with running out of duty cycle on my injectors. I currently have 550/1000 and they max out at 5800 rpm(actually about 5000 it hits 80%) I have a rising rate regulator malpassi 1:7 and I was wondering if anyone had adjusted these before and had some tips. I am running 45psi above the manifold pressure at the moment and have 2 LARGE efi pumps pushing fuel to my engine. I would like to know if I can get the pressure up to 55 psi or is this asking too much? I may need to bite the bullet and run 1000/1680 but thats another $400au plus the time to modify them.

Any suggestions?

TII 3 inch exhaust High flow S4 turbo running 9.2 psi LARGE extend port and a Wolf V4 new jocks after first full power run. Fuel bowser towed behind.

Michael Smith

 

you should get new injectors. im currently running 1000/1680s. the bosch 1680s took about 10 minutes to modify to fit into the secondaries. the rc engineering 1000cc primaries fit in perfectly

 

on a side note, what is the size of the 12A turbo injectors (green colour)?

 

Wow extended port really hungry for fuel. I was fine with 550/1000 all the way to 14psi @ 85 duty but that's for stock engine, 60-1. Static fuel pressure set @ 45psi

 

The housings have the same port timing as used on 8 sec drag car. I have small exhaust ports to keep the exhaust speed up. I have a modified S4 turbo with a TO4 compressor. I couldn't see the road real well either. My fuel pressure rises with boost so it is pushing in some fuel!!! I haven't even set up my boost control yet and running only 9.2 psi.
I still run the top mount IC too looks dead stock except for the BOV. I will run dry ice at the track to cool it off. In the mean time it looks like 5000 rpm is it.
Michael Smith

 

Ok I got some good tuning done today with my brother inlaw. It was a little rough when we started but it feels good now. I will need to get 1680cc injectors if I want to run more than 10 psi. I am running right on 80% duty with 9.2 psi but I can get 7000rpm and it is little rich. Tonight I cleaned up around the map to do another tuning run during the week. I also now have a dislike for rough roads and corners bloody mouse cursor jumping all over the place. I will get the neck brace off tomorrow

Michael Smith