Jump to content
SAU Community

Recommended Posts

  • Replies 138
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

i got over 200kw with stock ecu and turbo. there are people with only about 180kw with pfc. just goes to show that a poorly tuned ecu is worse then a stock ecu that is pulling its weight.

just remember dyno to dyno and also the health of the motor :D

but yes a poorly tuned computer is a bad thing

I'm no expert but surely a standard computer running high boost etc, to approx 200rwkw is not going to be as good as an aftermarket programmable ecu.

Sure the car might make 200rwkw but on what dyno? If the same car for eg had a PFC put in and tuned (on the same dyno) then it might only make about 200rwkw aswell. BUT I'm pretty sure that an adjustment on the standard fuel settings alone will give you an improvement in low-midrange power which would be quite significant. It isn't all about the peak figure is it? its the area under the power line i think that makes the diff.

This would make a SAFC 2 or similar worth installing wouldn't it? but then if you save a few extra $ then you get a pfc, you still have to tune both it's pretty much the diff in cost of the pfc or safc.

I have heard the Blitz sbc boost controllers are probably the best followed by the HKS one, this is what I have heard (not experienced), is this what others think? The apexi boost controllers aren't supposed to be very good .

Is a Nismo or Tomei fuel pump a better option than the bosch (in tank setup)? does anyone have trouble with the pump picking fuel up when the tank is below 1/4 fuel? The nismo and tomei are just a direct replacement item and should be exactly the same as standard, only with a higher pressure capability.

If anyone disagrees with me then thats cool, back it up though and give me (us all) some reasons and I'll gladly accept it, I'm open to suggestion an here to learn.

Good luck with the mods Quinny

go to the dyno section and have a look at my graph. it is smooth most of the way up, especially down low. its smoother than paulr33's graph and he has a pfc. there is 2 dips where it leaned out a touch, but if it was right it would've been a dead smooth graph. and my torque curve shows it is even too.

http://www.skylinesaustralia.com/forums/in...ic=55845&st=160 about 3rd one down.

Edited by mad082

I believe he is refering to yours Paulr33,

----------

So pauls appears to have a problem with the top end reading flat then...

Compare it to something else..

Maybe this one I've attached that obviously doesn't have something strange going on with a flat top end.

Comparing dyno's is silly unless its on the same day same dyno, same fuel, same operator same person tying the car down.

post-382-1150285762.jpg

what mods on the car on that dyno. just power fc? i'm below it all the way. but that has obviously tuned well. the point i'm trying to make is that a poorly tuned pfc will be worse than a good stock ecu. bigger isn't always better.

This is what I was meaning really, there not too much point in saying a car gets this or that many rwkw's unless its comparable. One car could read 40-50kw different on different dynos.

On a different note.. Mad, I would be interested to see a dyno graph of yours with the boost or preferrably the AFR's on it. Would like to know what the computer is doing to the afrs to get such a power figure.

Have you ever been under the impression that your stock ecu has been chipped/ flashed?

Are you running splitfires to cope with your increased boost or are the stockies holding in there for now?

oh yeah he is comparing it to mine, right. the graph you are looking at is outdated, the tune is far from a poor tune i have spent a few hours tuning it and so to have some workshops in melbourne.

also if you are on stock ecu and stock turbo then you would be encountering the rich and retard protection well before you made any decent power

so you have piggybacked, clamped afm or remapped

stock coilpacks, ecu is stock, but has run a piggy back in the past as the wires have been spliced. we just did some 'tinkering' to get more power. any mechanic with half a brain could tell you to do.

wanted to get afr's but they wouldn't give them to me. all they said was that they could be improved a little. it is still running full stock fuel system. it was leaning out a little up top, thats what the dips are. its where they lifted off the throttle a bit till it richened up a bit.

so have you avoided the stock airflow protection ?

just saw 2nd post so you run just underneath it then. sure

so what are you trying to say

the powerfc is shit cos you make more max power ?

how are the IGN points tuned?

how are the cruise AFR's tuned ?

no i'm saying your tune is crap cause it dies at 6000rpm, whereas mine keeps making power till redline. and i'm saying that a stock ecu that is running well will make nearly as much power as a well tuned pfc on the same car, provided it is below the boost cut.

i know you can make over 200kw with the stock ecu, its nothing knew i am just curious as a stock stock ecu wont make that amount of power, it will encounter rich and retard protection. and usually if you bypass that it will still plummet to mega rich land somewhere near 10 afr's so your power goes out the window. the only way to bring it back into line near 12 is to piggyback fuel computer, trick/hack the afm or clamp it's signal.

a piggyback fuel computer can clamp or keep limiting the afm signal to get around the excess protection. its not actually boost cut at all its excess airflow. nothing to do with boost

well what did you expect to happen? do you expect the powerfc would make double the max power? of course it wont. why would it? airflow makes power not ecu code or logic. sure it will most likely make more power, but certainly not double or triple. i think people just assume if you have a powerfc it should be at least 220rwkw as most can make near 180rwkw on stock ecu.

and yes my max power dies off, i have known this for some time now. my rb25 has 150,000k's on it. how many does yours have

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Well, I can recommend the partial AV system translation CD I ordered from Car Audio Workshop in NZ. Whilst it didn't address the date issue, it has conveniently translated on-screen menu items into English, and now allows the GPS-received time to be offset in hours rather than minutes, so I can display Eastern Australian time accurately ( and bump it by another hour when daylight savings starts ).
    • Yuh, if it's 45°C outside, my car is driving in it.
    • I'd be curious to hear more. Otherwise, have you driven a modern x-trail? I wonder how it compares. Here in Australia they are/were popular for rentals and fleet vehicles. I have been in some and my impression was they are bad. But, this may have been very different in the 2000s at a good trim level. Twenty years is plenty of time to make the model worse. I do very much agree with the 2 silver cars in the garage approach. But, not driving because it's too hot would not leave a lot of time in the year for many Australians. I don't think you need to worry too much unless the car has actual issues with overheating. 
    • Back again. I returned to Japan in Jul/Aug to spend time with the car on my birthday and remind myself what all the sacrifice and compromise is for. It happened to line up with the monthly morning meet in Okutama, which I have been wanting to go to for a long time. It's a unique event at a unique spot with really rare, interesting, and quirky cars. It's where all the oldheads and OGs gather. The nighttime scene at DKF certainly has its place and should be experienced if you're into cars, but there's too much bad attention and negativity around it now. IMO the better time is Sunday morning at DKF or Okutama; it's more chill and relaxed. I'm glad I was finally able to go, but not sure it's worth the drive from all the way from Nagoya immediately the day before, unless I was already staying in Tokyo for the days right before the meet, because you have to wake up quite early to make it in time. Funnily enough though I didn't drive the car all that much this trip because it was just too damn hot. While there were zero issues and running temps were nominal and the A/C was strong, RBs already run crazy hot as it is. Sure, it took it all like a champ but something about driving these cars in the ridiculous heat/humidity bothers me and makes me feel like I'm asking too much of it. I'm just me being weird and treating the car like a living thing with feelings; I'm mechanically sympathetic to a fault. Instead I was mainly driving something else around - a KX4(silver) 2001 X-Trail GT, that I acquired in May. There's a few different flavors to choose from with Xs, but visually it's the Nissan version of the Honda CR-V. Mechanically it's a whole different story as this, being the top-trim GT, has an SR20VET mated to a four-speed auto and full-time AWD! It was a very affordable buy in exceptional condition inside and out, with very low mileage...only 48k kms. Most likely it was owned by an older person who kept it garaged and well-maintained, so I'm really happy with how it all worked out. It literally needs zero attention at the moment, albeit except for some minor visual touch-ups. I wanted something quirky, interesting, and practical and for sure it handily delivers on all three of those aspects. I was immediately able to utilize the cargo and passenger capacity to its full extent. It's a lot of fun to drive and is quite punchy through 1st and 2nd. It's very unassuming -in the twisty bits it's a lot more composed than one would think at a glance- and it'll be even better once I get better tires on it(yes, it's an SUV but still a little boat-y for my liking). So...now I have two golden-era Nissans in silver. One sports car and one that does everything else; the perfect two-car solution I think👍 The rest of the trip...I was able to turn my stressed brain off and enjoy it, although I didn't quite get to do as much as I thought. I did some interesting things, met some interesting people, and happened into some interesting situations however, that's all for another post though only if people really want to know. Project-wise, I went back to Mine's again to discuss more plans and am hoping to wrap that up real soon; keep watching this space if that interests you. Additionally, while working in the tormenting sweatbox that is the warehouse, I was able to organize most of the myriad of parts that my friend is storing for me along with the cars, and the 34 has a nice little spot carved out for it: And since it can get so stupid hot in there, that made it all the more easy -after I was standing there looking at the car and said 'f**k it'- to finally remove all the damn gauges that have mostly been an eyesore all this time. Huzzah. The heat basically makes the adhesive backing on the gauge mounts more pliable to work with, so it was far less stressful getting this done. I didn't fully clean it up or chase the wiring though; that will happen once I have the car in closer possession. Another major reason to remove all that stuff is to give people less reasons to get in my car and steal s**t while it's being exported/imported when/if the time comes, which leads us to my next point... ...and that is even though it's time in Japan is technically almost up since it's a November car and the X would be coming in March, I'm still not entirely sure where my life and career is headed; I don't really know what the future looks like and where I'm going to end up. I feel there's a great deal of uncertainty with me and as a result of that, it feels like I'm at a crossroads moreso now than any point in my life thus far and there are some choices I need to make. Yes, I've had some years to consider things and prepare myself, however too much has happened in that time to maintain confidence and everything feels so up in the air; tenuous one might say. Simply put, there's just too much nonsense going on right now from multiple vectors. Admittedly, I'm struggling to stay in the game and keep my eyes on the prize. So much so in fact, that very recently I came the closest I ever have before to calling it quits outright; selling everything and moving on and not looking back. The astute among you will pick up on key subtext within this paragraph. In the meantime I've still managed to slowly acquire some final bits for the car, but it feels nice knowing there's not much left to get and I'm almost across that finish line; I have almost everything I'll ever want for my interpretation and expression on what it is I think an R34 should be. 'til later.
    • Thanks for that, hadn’t used my brain enough to think about that. 
×
×
  • Create New...