paulr33

http://www1.jaycar.com.au/productView.asp?ID=KC5378

you would think so, its purely an on/off relay to fire the solenoid

how many would be interested in a custom "ap engineered" style PFC to suit their rb25 it would mean however no working VCT support. if you have aftermarket exhaust cam gear then this problem is void. it would involve me buying a 26 PFC and then making some changes to suit your rb25

http://www.endofworld.net/

it odd, i dont get why they cant adapt the 26 pfc processor onto the rb25 operating board the 26 pfc works on the rb25 so go figure

I will be there for most of the day is anyone needs advice on their dyno results, has any general questions on tuning & modifications etc.

yeah im not to keen to go hacking my wiring loom after last time

the pfc faq has a better explanation of the injector correction and latency screens that old stuff you screen captures is from the rx7 with pri and sec injectors thats only likely to confuse you more, check the pfc faq under advanced tuning (its in my sig)

sorry to see it go mark but not much u can do hey u should be off your p's soon though ?

ive been thinking about buying a 26 pfc for a while now and just trying it on my car as i have datalogit but the main worry is the wiring loom changes i guess i could open it up and make the changes ap engineering style

a faq for the emanage would be very useful its not a matter of beer but a matter of changes, adaptions and known "gotchas" when using the rb26 PFC on rb26 the biggest known gotcha is no VCT support at all if you have aftermarket exhaust cam gears then this point is void. in summary; you need to copy the stock rb25 maps onto it (need datalogit) need to parrell up the afm signal (single afm into twin afm ecu) need to parrell up the 02 signal (single 02 into twin 02 ecu) rescale injectors down to rb25 size (unless u have larger ones) but there are plus sides; djetro option working air temp support can use twin or single afms if u want (both work) can use twin or single 02 sensor (both work) and u can buy it new from most apexi distro's (nengun comes to mind) for $890 delivered

if there is no fuel how can detonation occur

now that makes sense

hi steve, welcome aboard and hopefully will see you on saturday. have a read of the PFC FAQ in my signature, it covers how to debug knocking and correct it.

yes

if youve reset it, then it should be back to defaults the stock maps are prretty good i wouldnt call them sluggish but fairly good out of the box to suit most cars and conditions try SETTING, IGN MAP if you see all zero's then its locked

the base map is fine and should be suitable and smooth to drive there should be no strange idling, no smoke, no nosise or dash cluster lights on etc if you have a strange idle i suspect something is wrong ie: afms busted wrong injectors leaking intake piping dodgy aac valve etc etc have u looked in SENSOR SW / CHECK to see if anything is odd ?

yeah u need to power cycle it to complete it and restart the self idle learn

i will do some more research into it

that i cannot explain :sorcerer:

hmm well then im not sure i cant see a reason why a new pair of turbo's would surge when going from vacuum to positive pressure knowing what the tuners do to fix it could help give it away maybe they just retard the timing a touch during boost build that could help, but a bit of a poor mans fix maybe? id love to know the cause

i also think there are two issues here (well maybe) compressor surge of "fluttering" occurs when pressure past the compressor is beyond what the compessor can supply ie: workshop A hiflow and do whatever and you go and run the turbo you dial in 15psi but forwhatever reason (mismatched combo, bad wheel, etc) then manifold pressure ramps to 22psi the compressor wheel surge's as the pressure past the outlet is greater than what it can supply so it flutters/surge's i would expect this problem to only occur at full throttle, wide open throttle and aggressive boost building / full load the other scenario is the common after market twin turbo flutter / chuffing which i think is a combo of the bov's half opening and venting back and then actuators opening/closing in a harsh and on/off type fashion instead of soft and progressive. this only occurs during light / medium load and usually up a hill is a good example of when it occurs

its not the wastegate's fault, there is no such thing as wastegate flutter its do with the bov's, i suspect they are half opening and its causing a conflict with either the compressors or the actuators opening and closing rapidly as pressure in the manifold varies rapidly as simple as adjusting the duty cycle on the boost controller so its slow and progrssive would possibly cure it out i suspect thats what most tuners do to correct it, make the solenoid open slow and in small increments instead of fast and hard that way it doesnt induce open/close/open/close type behaviour, which dictates massive changes rapidly in manifold pressure as the compressor is sped up and slowed down repeated really quickly

i dont understand how it can be a case of stuffing too much air into the cylinders from what we know it happens when the engine is on some load (not max) and its up a hill a hill usually brings on good engine load, which is great for boost building but it happens when the user is on half throttle, not what i would call max throttle at least, what i have read it occurs when its half throttle, and not max, is that correct?

actually it makes a bit of sense if it is seeing the pressure vary cos then it would close and open its solenoid based on pressure so the turbine would speed up quickly as the gate would close then it would open again, like rapid chatter try it and let us know if the boost varies rapidly (as in the controller display) plot BOOST on analog chart display and see what it looks like