mother of god...

[r34 gtr]

ok, i thought it was running very rich, well, i knew this, but today... i went to birmingham to get the car dyno'd. it was miserable. i turned the floor of the shop black with soot. the little ca put down a *whopping* (sarcasm is as thick as molasses here) 128.59 with the factory ecu and 123.84 with the swat ecu. the air fuel ratio was too low to read, but the way it plummeted, we concluded it was about 6:1. uuuum. yeah. ideas? we messed around with it and managed 150.97hp and 162.53ft/lbs of torque when a bleeder valve was hooked up so i ran a little more boost (about 2 lbs). he said that with a proper air/fuel ratio, he could see it making about 200whp. im buying a safc and a boost controller tonight. (since i cant figure out why its running so rich, im just gonna crank the safc to 50% lean all through the rpm band, and boost it to 14psi so i can use the fuel. it took me friggin 12 gallons of gas to go 160 miles and i had to borrow money from my friend's dad so i could make it home; this was gay. ive got a few questions though: 1. will the stock head gasket take 14psi? the brits seem to believe it will. 2. what could possibly make my car run so god****ingdamnrich? does anyone have a spare safc2 or something? or an electronic boost controller? or a metal headgasket they bought but never used?

he said my clutch held alright, but then again my power curve is pretty flat and good looking and it doesnt rip at the clutch to much. also, will i need the ol' front mount intercooler to do this? my car runs cold and if i thrash it, then jump out and feel the intercooler, its never warm..

[Nismo1182]

Do you have a FMIC? What turbo?

[r34 gtr]

ok, got an safc2 and a blitz dual sbc. so now im broke. whee, the account's back to normal again. do you guys think ill need the fmic right this second? (i know i need it..but can i do without it until say, december? its not like its hot outside right now) and i reaaaaallllly need to know if this stock head gasket will hold. 12-14psi, no less, ive gotta use all this dern fuel.

[r34 gtr]

no fmic as of current (need to remove from profile i guess..it kinda got owned when it broke down last), and its the stock CA t25, but its brand new, has about 2k miles on it since a complete rebuild.

[Nismo1182]

I ran 12 psi on my SR sidemount, which is a lilttle better than a ca one, all aluminum vs platic end tanks.

Motor handled it fine. The sidemount does not like over 14 psi. I ran 15 psi with a spikes to 17. Motor didnt not like it and I popped the headgasket. I had the crappy stock turbo too.

[boost_boy]

Quote »will the stock head gasket take 14psi?[/quote] Yes it can and actually can take more. But if you're running all that hot air through any side mount intercooler (inefficient for high boost), your system will eventually go lean and toast the headgasket. I've stated this time and time again; you cannot run highboost on the stock system unless you have at least a SAFC to richen the A/F ratio in the upper rpm and boost area. The stock turbo should not be taken past 12 psi with spikes to 14-15psi. The stock intercooler is garbage "point blank". You guys have no idea how high the intake temperatures get from one burst of 12psi, huh? Well, I do and the intake temperatures get as as high as 186degrees which is considerably higher than the engine coolant temperatures. Now you all know that SMIC is a joke, maybe you'll stop trying to run big boost on a piss-head turbo and a less than adequate for high performance fuel system or you will be doiong some unnecessary repairs on your motors. And r34 gtr, I can assume your car is running crappy due to either a leak in the system, improperly located afm, crappy afm, a faulty air regulator (this is the most common), faulty water temperature sensor (I would change this right away) and check the spark plugs. You car put out good torque, but it's very clear to see that your car is functioning on the less than normal side of the house. Inspect the system really good for these suspected items.

Dee

[slw240sx]

man even my car runs better then that!

1. get a stock ECU!!!2. check MAF3. air regulator4 new coolant temp sensor ! should have been replaced already!

[r34 gtr]

ok, it has the stock ecu, that didnt help my a/f ratio much, although it did change it for the better. i just went and checked the whole system for leaks, it didnt have any. also checked the mass air sensor. it was clean and passed the test as described in the fsm with flying colors. the air regulator is new, i replaced it a while ago, it didnt fix anything. im about to go replace the coolant temp. sensor, but i doubt this could be causing an air/fuel ratio of 6. i mean, thats just disgustingly rich. we're puzzled as to why the car even runs! boost boy, i know the stock side mount is a pile of trash, but i just need it to last me a few weeks until i can score a front mount from an unsuspecting friend. the same goes for the head gasket-well, not getting it from a friend-, but this i can probably get in about a week, depending on how much money i can scrounge up.

- tim

[cuzan0]

check your fuel pressure regulator,the vaccum to your fpr also

[r34 gtr]

fuel pressure is fine, its exactly what it should be. vacuum to fpr is fine also. just checked the temp sensor, hot and cold resistance are exactly what they should be. ecu gives code 55, all fine. put in diagnostics mode 5 and messed with wires and connectors and stuff, no codes thrown/lights blinking, etc. ecu says air/fuel ratio is exactly what it should be. im so confused.. there doesnt seem to be a problem anywhere.

[boost_boy]

How good is your oxygen sensor? I would even purchase a new one just to see if it helps. One of the things that is of the utmost importance is where how close you place your afm to the turbo. Maybe the timing? Other than that, I'm at a loss. I had experienced problems with the stock system and even the JWT ecu at which time I had said screw this; pulled all the factory harness, ecu, Z32 AFM crap out, ordered a standalone an it made my old T25 powered CA18DET run like it had been touched by Norton's Anti-Virus!:ylsuper

[r34 gtr]

nice. the o2 sensor is new and the afm is in the stock location at the front of the engine bay, away from heat and such. think i got the problem fixed though, we shall see what happens over the next few days. the brown wire on the engine room harness which supplies power to the o2 sensor, aac solenoid valve, pressure control solenoid valve, etc. had NO power, im talking, like, 40mV. spliced it into a good power wire and it ran like a million bucks. guess ill go drive it around now and see what happens. (good job ramsey family shoddy wiring skills!)

- tim

[r34 gtr]

YARRRRRG it runs like crazy. i stepped on it and it tore me a new one. i definately got some power back. doesnt blow soot either. yay! i cant believe that all of those things werent getting power. my dad and i were in awe of how smoothly it runs now, it idles great, right at 850rpm and 1100-1200 when its cold. it revs quickly and smoothly and no longer chokes or makes pathetic noises above 4200rpm. thanks for everyone's help, i am thinking the problem has been fixed, but i wont know for several days-until the car has cleared itself out. oh, and im still getting the afc and the dual sbc, i couldnt help myself. but now i wont have to rape the car heat-wise until i get the fmic and the metal head gasket, i can keep it at its stock 7psi or so. the fmic i should have by the time the electronic stuff comes in, because i didnt realize that i had one last paycheck to deposit before im broke and without income.

- tim

[boost_boy]

Good to hear you're having some success.