yeah i've got my standard one here ready to try out. can you give me a quick run down on how to change it? my mechanic put the malpassi on, so i didn't have anything to do with it.. i'm not sure if i need the rising rate. i run somewhere around 12-14psi through the standard T3. only other mods are intercooler, ported exhaust manifold, 3.5" dump into 3" system and 984 pump as mentioned above. would the 984 be maybe raising fuel pressure enough without the malpassi?

I've recently got a Sard Reg, simply so i can drop the pressure when i fit a 984, im preety sure the standard reg won't like the extra volume, so i plan to adjust the Sard down to factory pressures. But haven't done it so not entirely sure what the actual result will be. If you have a non-standard pump, maybe its not a good idea to remove the malpassi reg. Maybe you are best just to check the actual pressures on the dyno, or with a guage mounted in cabin, to save the stuffing around. If you had the standard pump i would say, bolt on the factory reg, but if you have bigger pump, it probally won't give the pressures required. Sorry i can't be any more help. You really need to know what the pressure is under boost, to tell if its out of spec.

If it goes on the dyno, get a printout of the actual Air Fuel Ratio's, so you know what its like throughout the powerband. So you know how rich it actually is. Also it would be good to know if its running in closed loop under light load driving. You check this by looking at the LED lights on the ECU, they should blink together in sync if its in closed loop. (My point here is, if its in closed loop, it means the base fuel pressure is preety good) If it wasn't in closed loop, the fuel pressure may be higher then required even under vacuum conditions. (Base pressure) (The ecu can only adjust a few percent, either rich or lean of the factory injector pulse widths, so if the pressure is to higher it may not be able to lean the mixtures even under light load enough to get into closed loop or the target 14.7:1 stoich ratio, my point of this being, if its in closed loop, you know the base pressure is correct, if it wasn't closed loop, you could, lower the base pressure a little, and see what happens, if you can get the base pressure lower and its not to lean, it will lean out the top end mixtures too)

is the sard a rising rate? what would be the difference between that and my malpassi? Quote: Originally Posted by vltrb-0 you could get some 1/4" hose and run it to your dash just temporarily mounting it there and clamp it with some EFI hose clamps to get a read if your desperate but the dyno sounds a better idea also, has anyone got a few minutes to explain how to do this, in a little more detail for me? at the moment, i've got the gauge on the malpassi.. just want it TEMPORARILY in the cabin or on the cowl panel so i can check pressure under boost..

Quote: Originally Posted by RB30-POWER If it goes on the dyno, get a printout of the actual Air Fuel Ratio's, so you know what its like throughout the powerband. So you know how rich it actually is. Also it would be good to know if its running in closed loop under light load driving. You check this by looking at the LED lights on the ECU, they should blink together in sync if its in closed loop. (My point here is, if its in closed loop, it means the base fuel pressure is preety good) If it wasn't in closed loop, the fuel pressure may be higher then required even under vacuum conditions. (Base pressure) (The ecu can only adjust a few percent, either rich or lean of the factory injector pulse widths, so if the pressure is to higher it may not be able to lean the mixtures even under light load enough to get into closed loop or the target 14.7:1 stoich ratio, my point of this being, if its in closed loop, you know the base pressure is correct, if it wasn't closed loop, you could, lower the base pressure a little, and see what happens, if you can get the base pressure lower and its not to lean, it will lean out the top end mixtures too) i think my mechanic mentioned he couldn't get the base pressure any lower because of the 984, but as its flickering between 30-40psi i figured it should be around 35psi..