Hi All,

I am trying to find the limit of the stock inductions system concerning forced induction. I am considering putting a Supercharger on my little 2001 2.3L and would like to maintain the stock fuel/timming managment system. (Not asking much, ya right!)

In research I have done for various Supercharger kits indicate that most systems can accomodate around 4-5 psi using the stock fuel/timming computer and anything above 4-5 psi would require some remapping of the stock ecu, a 3rd party managment system or other more basic tricks to make it not detonate.

Anyway, I am just starting my research so any advice or help would be appreciated.

Don
2001 2.3L Ranger (disco truck)
1985 Supercharged 911 Carrera/Targa 270hp/245Lbs torque
w/7psi of boost

:confused:

Does the DOHC 2.3 have a returnless fuel system? If not you could run an FMU...and MSD's BTM will take care of the timing without cracking the computer code or going to aftermarket EFI.

I know you asked for the limits of the stock systems, but that engine's so new I doubt anyone knows for sure. Those are good rules of thumb, but are you really going to be happy with only 5 psi? I've got 10 and want 10 more...

Actually, the engine has whats called a feedback fuel system which I assume is a return system your referring to (just started research so not exactly sure). I would be interested in aftermarket systems (FMU etc...) as long as I can return it to stock condition with minimal effort. With my 911, I have only 2 options to pass smog, first is to find a non reputable smog guy that only cares about money and 2, I remove the entire blower system and replace the stock intake. Both are a pain in the butt, I think I would prefer the non-reputable solution because it is about a 2-3 day effort to remove and replace the Supercharger, ouch!

On the 911, a simple chip change in the motronics and a rising rate fuel pressure regulator is all that is used to deal with detonation at 7Lbs of boost. I could go higher but the cost is a little prohibitive ie; piston changes, rods, blah blah blah.

My ultimate goal is to try and not hack up the stock system too much ergo limiting the amount of boost to what the stock system could manage with minimal upgrades. I live in California and getting it smogged gets a little tricky with mutated intake systems. Also if I could get it CARB Certified for 50 state smog legal, I could offer it as a kit later?

In response to your question, Yes I would like more boost but
I want to take it a step at a time. Also, Supercharging is a little different than Turbocharging when it comes to boost and as I mentioned above I want to avoid cracking into the case or replacing all the management systems. I will work from 4-5 psi up and see what I can get away with.

Thanks for your input and if you have any other input I would appreciate it anytime!

Don