Alright! I know nothing about boost measurements that are not psi. On my commander it read +0.76 when I was flooring it, and my Inj Duty Cycle was 93%. I'm running stock pump, and stock inj. Anything wrong here, or am I just paranoid?

 

.76 bar is about 11 psi. Don't have any experience with duty cycles but that seems a little high to me for 'only' 11 psi.

 

yep your probably due for a fuel pump and a tune.... do you still have the stock main cat?

 

HKS RS Intakes, HKS Downpipe, stock main cat, A`PEX-i PS Revolution Cat-Back Exhaust, A`PEX-i PFC w/Commander, Apexera Super Ground Kit w/Exhaust Ground. Stock pump, stock Injectors, and base map no tune. I'm getting a tune in December after I replace my clutch with a hyper single, with new synchros and bearings. Also, I'm going to install the 850cc inj for primaries, and I just got a deal on a Walbro pump *$50* (I want to run a A`PEX-i Fuel Pump, but money is going to other things at the moment, and I figured the walbro would suffice for 12PSI of boost with the tune). Will this fix my problems? I am getting horrible gas mileage. I have a new O2 sensor and fuel filter for that too.

 

What have you done with the PFC? Because I can tell you that even in cold weather, you wouldn't be hitting 93% on the default map until 13 psi or so.

www.onlineconversions.com is your friend.....

 

I havent done anything Tyler, except the fan mod.

 

bro buy a toyota supra turbo fuel pump its good for 440 whp... and buy a split second injector controlllerrrr with 2 extra 850 injectors.... trust me i made 390 hp at 14 psi with a stock computer... on 93 octane... joey that use to work at japtrix and drives the blue car that him and i have built my car... never poped a motor the 2 years i had my car....12.1 @117 on 93 octane.. 14psi with a 2.3 60f ft on nitto dr's burning 1st, 2nd and some of third.... any questions feel free to email me... and if anyone has any questions i can prob.answer tehmmm...vic

 

Right, recommend an injector controller and additional injectors....that solution was good...about 10 years ago. Also, adding a fuel pump won't change anything having to do with duty cycle of the injectors. 390 rwhp at 14 psi on stock twins with stock ecu...RIIIGHT.

I honestly don't know how you could hit 93% at only 10 psi with the default map. I only saw that on cooler nights at 13 psi or so with the default map.

Keep watching it but I think you are ok. If it keeps doing it, post back and I'll move this to the PFC forum and we'll figure it out.

 

/\ Agreed, Chuck will probably shed some light on what to do.

 

You should not be anywhere close to 93% at .76kg/cm2 with the stock map.

There are a whole host of adjustments that can be made on the Commander for air temperature, water temperature etc. I suspect that one of these settings has been modified from stock and you are dumping fuel (which would explain your poor gas mileage). I believe that the Commander allows you to revert to the original map.

Also, what are your indicated water and air temperatures when you see these injector duties?

 

My PFC shows .75-.85 maximum readings, but if I look at my defi boost gauge, it shows over 13psi. My boost gauge is connected to my pressure line with a "T". I don't know if the sensor is accurate or what.

 

This is a defect of the PFC that's been known for 4 years or so. The PFC is internally reading the correct pressure, but there is a conversion error for display on the Commander. The higher you boost, the less accurate (and lower) the PFC Commander displays. It will datalog the correct boost level.

 

At that time when I did that check, it was really early in the morning around 5 am. My air temp was between 27-33, and my water temp was around 100. I tried again today in a little bit warmer condition. I have a cooling problem right now, so my temp was 105-110, my air temp was about 55, and my duty cycle showed 86.5%. Was the last reading that cold morning, was because of how cold it was?

 

Hey Tyler, I'm going to install 850cc primaries, and a walbro fuel pump, and do a tune. SHould that help me out a bit?

 

I had Gene (RX7RAGE) do the fan mod for me. Would that have to do with anything?

 

I think you need to try to fix the problem instead of applying bandaids.....MOVING to PFC forum.

 

So what are your suggestions Tyler?

 

Well, if you haven't done any changes for other things....I would reinitialize the PFC for starters. Why did you do the fan mod when you can set the fan temps to whatever you want with a Datalogit? You need to get one of those.

What boost are you hitting according to your gauge?

 

No, Gene (RX7RAGE) used the datalogic to mod the fan! haha, not the fan sensor mod thing. This may sound really stupid of me, but I don't have a boost gauge just yet. I'm planning on installing VDO gauges after I do this whole rear main seal ordeal. I just bought a tranny from Rich, and those 850cc inj from him too. I also have a clutch to put in. Then do a tune. Is it good to tune right after I put a new clutch in? Or should I wait to break in the clutch then install the inj to tune?

 

I would break-in the clutch for a good 500 miles before getting all jiggy on it. Did Gene change anything else when he changed the fan settings? Perhaps he accidentally changed something.

 

nope, didnt change anything but his fan temps with the datalogit...

 

Hi Gene! haha! I'm getting my radiator fluid flushed tomorrow, and replacing the thermo with a brand new OEM one with 3 holes drilled in it.

 

nice, hopefully that will fix your cooling problem.

 

Hey, I got the thermo done, and it holds at 85c and the highest I've seen it go while driving is around 87. I also changed my hoses on the intercooler hotside. I believe this is the culprit. I now hold boost at .69 (Didn't push too hard since my clutch is slipping, but that is flooring it to redline in 1st and 2nd). The water temps average 85c and the air temps are okay. The inj duty cycle averages 85% when I floor it. The highest I saw it go during the run was 86.5%. I feel that it is now holding boost better, and my water temps are awesome now.