Jump to content
SAU Community

Recommended Posts

  • Replies 6k
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

WOW - got my bush bearing high flow turbo today - Sliding Performance RB25 rated at 250rwkw at 1bar.

Im hoping for around 200awkw at 1bar once dynotuned at Graham West autos on the 4wd dyno, the safc and sitc will need a fair tweek I reckon. But I'll tell 'em you got 3hrs to do the job :happy: hehehe dont want to spend too much.

But putting it on the Stagea on Monday - cant wait !!! so excited ! :sorcerer:

hopefully it all works out smoothly, a backyarder install job so it'll be fun.

Im a bit limited atm tho to kneeling and all that, yet.

Plus I dont know when I'll be able to get it tuned. So I'll keep it to 10psi for now. :P

anyways, happy days

Brendan, all the best with the turbo install.

Actually I was just today wondering why the guy that tuned my car only left the boost at 11psi?! He reckoned if he put the boost any higher it'd hit boost cut - is that true? I thought there was no boost/fuel cut or anything - its just if the ecu detects too much airflow it will hit R&R??

Made me wonder if I took it to a different tuner would they be able to get more power out of it....hmmm.

yeah itd hit R&R (not boost cut) - but thats what your safc is for. plsu maybe a z32 afm sometime down the track. with a front mount and a tune at 1bar youd see good results.

isn't the stock r34 cooler meant to be good for 200awkw or close to? sure it wouldn't be at max efficiency at this level but I'm thinking I'd just get the power first and worry about that later - as long as its cool enough. One step at a time :P

I want to boost it to 14-15psi eventually (like u said ~1bar). THEN it can stay like that (think i've said that before lol).

Also the z32 would only be necessary once the stock afm is maxxed out - correct? still a little way off yet. I reckon I could squeeze another 10-15awkw out of it just by upping the boost and re-tuning...what ya reckon?

I'm getting 13L/100km city driving to/from work with aircon on half the time which I think is fantastic. I've seen 12.5L/100 and that included about 10% with aircon on...so I reckon there's still more leeway for more boost yeah?

Also, not sure why but my stock boost solenoid is still connected up to the intake piping as per before (not connected to wastegate tho - only the manual boost controller connects to that - and it appears to be done properly). Not sure if this would affect my boost level somehow - could be why its dropping off to 9psi?? Most people had good results with the needle valve boost controllers holding boost...but not me. If it held 11psi all the way I'd pick up 10awkw just there...

sounds great !

my thoughts are, with the safc, if you are going to retune it for more power; a) either tune for more power say at 13psi and pick up that 10+awkw, perhaps using a good EBC, or b) tune it once so supply the good EBC, a good FMIC and a Z32 afm and do it all at one, hell maybe even a bosch 040 fuel pump.

just that with the safc, if you add a fmic on right now your tune gets a bit outa whack - I noticed this with an aibox mod and also with the fmic install I did. ebay and it was cheap. ;) with the safc if you add bits and pieces here and there it puts the tune outa whack, etc.

she'll be right, all in good time hey. :P

sounds great !

my thoughts are, with the safc, if you are going to retune it for more power; a) either tune for more power say at 13psi and pick up that 10+awkw, perhaps using a good EBC, or b) tune it once so supply the good EBC, a good FMIC and a Z32 afm and do it all at one, hell maybe even a bosch 040 fuel pump.

just that with the safc, if you add a fmic on right now your tune gets a bit outa whack - I noticed this with an aibox mod and also with the fmic install I did. ebay and it was cheap. :P with the safc if you add bits and pieces here and there it puts the tune outa whack, etc.

she'll be right, all in good time hey. :(

yeah i was thinking about that too - even if I just want to wind the boost up a bit - it'd need a retune to work properly.

Not worth the $$ for a retune just for 10kw gain in my opinion. so i decided its better to wait until the next "upgrade" stage and do multiple things at once. better value for money that way...

still, no rush. Have been over the moon about the performance of the stag since my last tune. :P

that is, except for when the weather is hot, and the aircon must go on - turns the car into a slug, needing much higher revs than normal to get it to move :/

nothing better than taking the car out for a thrash on a cold night...makes it really go! :)

A little way to get around the R&R is to bump up fuel pressure and pull a heap of airflow out of it. The only issue with this that the ecu essentially runs on a lesser load point that runs more ignition timing. This will gain you a little more power before you hit r&r but after that you really need to drop an ITC on it.

OR... See Apexi are canning the Powerfc and have a type of piggy back full ecu replacement.. so still use the stock ecu but runs as a emanage type piggy back setup. It appears to look the goods and hopefully as they are canning the pfc it will be just as good as a full ecu.

A little way to get around the R&R is to bump up fuel pressure and pull a heap of airflow out of it. The only issue with this that the ecu essentially runs on a lesser load point that runs more ignition timing. This will gain you a little more power before you hit r&r but after that you really need to drop an ITC on it.

OR... See Apexi are canning the Powerfc and have a type of piggy back full ecu replacement.. so still use the stock ecu but runs as a emanage type piggy back setup. It appears to look the goods and hopefully as they are canning the pfc it will be just as good as a full ecu.

sounds great!

will look into it for sure :huh:

there is a nude male wrestling seen in which there is various sex position action which is highly disturbing. other than that borat is worth the money. he preys on americans total ignorance and stupidity and even made money off the people in skit. they are all real as they are skits. truly ingenious.

Cubes - any suggestion on how to (calmly) :) put the top turbo water feed banjo hard up against the turbo and feed the bolt in? Due to using the washers its just too much of a handful........

The top water feed?

You mean the side water feed/return? The top feed should be oil.

The side water feed/return closest to the block can be a pain in the arse as the inside washer falls down easily. I have in the past used a little petroleum jelly to hold it in place while I get the thread to take as it can some times be slightly off and quite stress full. :)

yeah, cheers mate. My thoughts late last night were to stick the washer down first with something, say oil or grease or gasket goop etc, and then get that thread to take.

oh well, back to finish off the job

ta mate.

Guest
This topic is now closed to further replies.



  • Similar Content

  • Latest Posts

    • Yeah, that's fine**. But the numbers you came up with are just wrong. Try it for yourself. Put in any voltage from the possible range and see what result you get. You get nonsense. ** When I say "fine", I mean, it's still shit. The very simple linear formula (slope & intercept) is shit for a sensor with a non-linear response. This is the curve, from your data above. Look at the CURVE! It's only really linear between about 30 and 90 °C. And if you used only that range to define a curve, it would be great. But you would go more and more wrong as you went to higher temps. And that is why the slope & intercept found when you use 50 and 150 as the end points is so bad halfway between those points. The real curve is a long way below the linear curve which just zips straight between the end points, like this one. You could probably use the same slope and a lower intercept, to move that straight line down, and spread the error out. But you would 5-10°C off in a lot of places. You'd need to say what temperature range you really wanted to be most right - say, 100 to 130, and plop the line closest to teh real curve in that region, which would make it quite wrong down at the lower temperatures. Let me just say that HPTuners are not being realistic in only allowing for a simple linear curve. 
    • I feel I should re-iterate. The above picture is the only option available in the software and the blurb from HP Tuners I quoted earlier is the only way to add data to it and that's the description they offer as to how to figure it out. The only fields available is the blank box after (Input/ ) and the box right before = Output. Those are the only numbers that can be entered.
    • No, your formula is arse backwards. Mine is totally different to yours, and is the one I said was bang on at 50 and 150. I'll put your data into Excel (actually it already is, chart it and fit a linear fit to it, aiming to make it evenly wrong across the whole span. But not now. Other things to do first.
    • God damnit. The only option I actually have in the software is the one that is screenshotted. I am glad that I at least got it right... for those two points. Would it actually change anything if I chose/used 80C and 120C as the two points instead? My brain wants to imagine the formula put into HPtuners would be the same equation, otherwise none of this makes sense to me, unless: 1) The formula you put into VCM Scanner/HPTuners is always linear 2) The two points/input pairs are only arbitrary to choose (as the documentation implies) IF the actual scaling of the sensor is linear. then 3) If the scaling is not linear, the two points you choose matter a great deal, because the formula will draw a line between those two points only.
    • Nah, that is hella wrong. If I do a simple linear between 150°C (0.407v) and 50°C (2.98v) I get the formula Temperature = -38.8651*voltage + 165.8181 It is perfectly correct at 50 and 150, but it is as much as 20° out in the region of 110°C, because the actual data is significantly non-linear there. It is no more than 4° out down at the lowest temperatures, but is is seriously shit almost everywhere. I cannot believe that the instruction is to do a 2 point linear fit. I would say the method I used previously would have to be better.
×
×
  • Create New...