rob82

Well if thats the case then any skyline running the standard ECU will be fine. The have both low octane and high octane ignition MAP's once the parameters are set for the amount of knock seen it will automatically revert back to a low octane MAP. Nissan, subaru, mitsubishi and holden all use this proceedure so that cars can be run on any fuel anywhere in any condtions, although some manufacturers do it better than others. Hmmm maybe thats why manufactures tune on the super safe side!!!! From the sounds of things you just got a bad batch of fuel and I bet if you got it from soewhere else it would be fine.

Your missing the point a sard or nismo FPR is 1:1. The reasoning behind this is to achevie a consitent fuel pressure across the injector ie the designed fuel pressure for the injector in use. So say your injector will flow 550cc/min of flow at 43psi you set your FPR to 43psi with no vacumm applied. So that when your under 15psi of manifold pressure the pressure behind the injector is 15psi onto of the rated fuel pressure. A 6:1 rising rate malpassi at 15psi of boost pressure will make 90psi of rail pressure. At 20 psi will make 120psi get the idea. What you guys with auto's want is an Xede.

Sards are 1:1 only. ie set rail pressure to the specified injector recomendation usually around 45psi (no vacumm) so at 10 psi of boost you have 45 + 10 = 55psi of rail pressure. What you want is a higher rate of rising so that at 10psi you have say 65psi. This is probly what your going to have to do I think capa have a FPR that is adjustable down to 2.5:1 minimum which may cause it to drown. This is what capa does on alot of their supercharger kits and it is totally the wrong way of doing things, not only are you imposing more strain on the injectors which may cause shitty atomisation but your also loading all your fuel lines which is just plane dangerous. Injectors should change the amount of fuel an engine consumes not the ancilleries to making them work. Your essentially using aged technology to gain a result in a day and age when there is a cheap product on the market (PFC) I just dont know why you wouldn't go down that route there will be far less headaches. Sorry for being the grench and it is only my opinon. But I think by the time you weight up the cost of braided fuel lines FPR and the like you would have been better off with a chip or PFC.

The standard R33 fuel map has really large numbers in the last two high load lines of the MAP the same for ignition but with less timing.

You going to need a rising rate FPR say 2:1 to account for the decreasing airflow the computer will see but the increasing fuel that is required. Essentially all your doing is decreasing the resolution of the MAPs by not allowing it to see high amounts of airflow lucky the standard comp has good interpolation.

Yep thats pretty normal and yes reads it from the plenum just before number 1 throttle body. Chances are if your not pushing it your not creating the airflow to cool it down and the air inside the IC plenum ect stagnates and heats. If you gave it a 2-3 long sqirts with over 4 pound of boost what happened then? You must remember that an IC is a heat transfer device so if the outside heat is greater than the inside temp then it will heat the air.

I think the point of increasing the RON was because of the fact the fuel is less dense. So while it may run a little leaner in theory it shouldn't succumb to spontaneous combustion as the extra toluene is there to compensate. You have got to remeber that ethanol has a lower heat of vaporization which may be the cause of less fuel in the combustion chamber; hence a leaner condition but its spin off is in cooling the charge.

I think your missing the point an AFR probe measures the oxygen content of the exhaust fumes so a fuel with a high content of 02 displays a richer mixture. This is why when you run NOS onto of a normal tune it runs richer as the NOS carries its own oxygen. The reason that it is leaning out is because of the desity of the fuel is less than normal 98 RON unleaded it was tuned for. Ethanol is essentially a solvent so it will decarbonise your motor which may in turn lead to clog injectors or the like I think this is the risk you take.

I'm not sure what the 02 reg does maybe it selects the type of 02 sensor ie narrow and wide band havn't really delved that far into ever. The 02 feedback should be the only setting you need to enable closed loop fueling.

Exactly.

It had an impul chip to begin with from Japan and made about 220rwkw at 12pounds after I retuned(I work at ChipTorque on the Gold Coast) it made 234 so 14rwkw over the impul tune. I wouldn't suggest going over 12pounds of boost in a car as old as the r32's unless you got the money to fork out for new turbo's a few guys on here will say you can run 14-15psi but I wouldn't risk it. Our chips have the ability to run two programs, so with the flick of a switch at any time it will change complete tunes ie High and low octane or if your doing the boost control throught the ECU high and low boost setting. I currently have a dual SBC as thats what came with the car but I will probably rip it off and use the factory boost control with an autronic solenoid. My boss travels across Australia to tune cars and is on his way down to Melbourne next week I believe so if you want a tune let me know.

Should not have an issue!! Sorry.

They both use a 0-1volt range as far as I'm aware so it should have an issue PFC. Chassis ground - as in anyware you can get a good contact to ground ie in a bolt hole. All your doing is checking that there is no voltage between grounds for the o2 sensors and chassis or ecu.

It should oscillate between about 0.1-0.9 volts holding it at 2000 rpm and in a steady state cruise situation. Should be the same for amost any votage based 0-1 volt O2 sensor. Thing to check is the bias to chassis ground and also ecu ground. It should also be checked with a wide band o2 sensor to show that the 02 sensor is not slow to react. Often harder to tell then just a faulty sensor.

Sure can. Mine is putting out about 234rwkw at 12pound in a GTST. Motor is stock GTR!!

You sometimes find that a car will not ping on the dyno but will on the road, its just due to the acceleration rates. Dyno dynamics shootout mode acceleration rates are far to fast IMO.

I read and modified my r32 GTR program that had an impul Chip in it. They had glued the EPROM onto the board. Nothing a heat gun and acetone and some time cant lift. The beauty of EPROM's is that they are the external memory source and its very easy to emulate the data. R33's use a micro that have onboard memory which means that you must lift it and read it which can destroy either the board or the micro. It also means that it is very hard to emulate though not impossible. Also the micro that they use is write once only. If the CPU has been socketed half the battle is won, PM me if you want me to have a look at the program. And as for protecting their data - thats a load of BS they just use a standard EPROM.

14:1 air fuel ratio ensures that all the fuel is burnt completely, no unburned fuel will be present in the exhaust. Leaning it off beyond 14:1 will not improve economy. <{POST_SNAPBACK}> [/quote Leaning it off will improve economy - this is why older cars as in pre 2002 run lean cruise mixtures. The problem with a leaning AFR is that you introduce more NOx which mixes with photochemical smog to produce O3 which depleates the ozone. Damn hippies f*#%ing our fuel economy. AFR up to about 17:1 can be seen under lean cruise. However nissan ECU's do not use the lean cruise function probably because of the reason above.

It really is a balance with tyre pressure's, as long as the tyre wall is not flexing onto itself less pressure helps as there is a larger suface area for road contact. Increasing tyre pressures reduces the tyres ability to flex and becomes to rigid.

Want you want to do is either create the rear to stop gripping or the front to grip more. These are the two opproaches. I would suggest removing the front strut brace, chances are its to rigid and there is no give in the chassis therefore not allowing it to twist. You might also want a softer spring on the front and maybe less tyre pressure. Or find the strongest rear strut brace you can and the highest F/mm (hardest) spring you can find for the rear. And also try more rear tyre pressure.

I have personally seen a gain of about 40awkw on a 400awkw wrx running autronic. Though we were running about 30psi of boost.

Modern ecu's have cat overtemp protection on them which means once they exceed a preset value the mixtures are richened as in really rich a standard GENIII will command between 11.0-11.2 for cat overtemp. There fore a leaner mixture will kill your cat quicker then a richer mixture. The thing to watch is how retarded the timing is. Thing is shit happens, get over it and move on. Yes he should have told you before bashing it out. He really should have just removed it and run the car to make sure the cat had broken up. Anyways when your modify your car you should expect some small things to go wrong.

How about closed loop fueling - as in tuning the car under full load as well as partial throttle. What we do is feed the input of a wideband 02 sensor and alter the MAF signal to get a desired AFR. That means instant tuning as you drive down the road. My boss is in the states at the moment experimenting with knock sensor tuning as well. You basically feed the knock sensor signal in and trim either side of a detonation event. The biggest thing is being able to clamp the output of the knock snsor on the rev limiter as the occurence of knock at the rev limit is high. It has been found that up 25 to 30 ft.lb more torque on the gear change in an EV08 - which is a shitload.

I thought those turbo's would have got you 300awkw and almost get 350awkw. They are rated at 600hp are they not?

I think I could recommend about a 1000 stores in sydney that could tune a microtech. Wether or not they do it properly is another question.