Best Bang For Your Bucks

[mad082]

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.

[rb26s13]

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

but yes a poorly tuned computer is a bad thing

[mad082]

yeah i know different dyno's pull different figures. but another r33 in town with same mods as me, but hasn't done any 'tinkering' like i did, only got 185kw on same dyno.

[Fry_33]

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

[mad082]

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 June 14, 2006 by mad082

[mad082]

just mapped out my graph against pauls. mine is up in about the same most of the way, but pulls ahead from all the way to redline, where his flattens off at about 6000rpm.

[paulr33]

me or another paul ?

[Cubes]

I believe he is refering to yours Paulr33,

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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.

[mad082]

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.

[Fry_33]

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?

[paulr33]

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.

[paulr33]

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

[mad082]

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.

[mad082]

no i get boost cut. cuts in about 1psi more than what i ran the dyno at. and it isn't just the car getting sluggish like you say. it is a violent cut.

[paulr33]

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 ?

[mad082]

i'm not the only one making over 200kw with the stock ecu. haven't you read the dyno section? a piggy back doesn't get rid of boost cut, only full ecu or fuel cut defender.

[mad082]

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.

[paulr33]

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

[paulr33]

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

[paulr33]

post up an AFR graph

that will tell the full story

i suspect near 12 AFR's which means its not a stock ecu or its been remapped