Quote:
Originally Posted by sigchuck
Is it okay to go to an -044 pump now with stock, NA CIS, or would this cause potential over-pressure issues?
|
Pump doesn't determine pressure, the regulator does. From Bosch Motorsport:
Quote:
|
Modern electric fuel pumps are “Positive Displacement” type pumps, this means that the pump cannot produce pressure unless it is acting upon a restriction. The only restriction in the system should be the fuel pressure regulator. The regulator controls the system pressure; the pressure ability or flow volume capacity of the fuel pump will not alter the system pressure.
|
Quote:
Originally Posted by sigchuck
I also do a fair amount of highway driving, and even in 5th, I find myself between 3500 and 4000 RPMs. Depending on turbo, would this have the potential to put me on boost for an extended period?
|
You'd like a taller 5th a lot better, I'm sure.
It won't make boost unless there's load; doesn't make boost purely because the RPMs are up there.
Which is why, when you're cruising at a constant speed/throttle opening on the highway and you start to climb a hill, the car will speed up - because it started to make boost due to the extra load. Kind of odd the first time it happens...
Quote:
Originally Posted by sigchuck
Lastly, would a K27-7200 be a good potential candidate for a low-boost 3.0 like this? I may have the opportunity to pick up a good used unit from a 964 for a reasonable price, and would like to know that it will have some value to someone if I choose to not pursue this project.
|
The K27-7200 would be an upgrade for a 930 with the original 3DLZ. For your purposes, think you would get the best results from a turbo selected to suit the application; e.g. small/fast-spooling, doesn't need to flow massive amounts of air.
The only upside of the 7200 would be that you could sell it to someone who hadn't figured out that there were much better K27s 20 years ago...