Jump to content
SAU Community

Recommended Posts

123 is probably closer to around 340rwkw - but either way it's a good result. Bit better 60ft and it'll be much closer to the 11 end :down:

Interesting figure on that boost, you sure they are -9's though?

Only reason i ask is those figures seem more representative of -5's on a factory head from all the results in the RB26 thread and other threads (they are pretty much identical)

Once you spend a bit of coin on the head/motor etc then 20psi seems to deliver around 380rwkw give/take which would also correlate with your results :D

yeah you have a point i might add its a rebuilt motor freshened up with forged Mahle pistons and bearings pretty much a nissan engine with all the bolt on goodies to boot.

The -5s are they not a 350hp rated turbo i cant remember i just payed the bill and went by what i was told was the next size up. From what i have seen and heard the -5 seem alot laggier than how my gtr responds and from arond 2 yrs ago when i did it all the -9 where the imbetween of the -7 and -5 .

Unless the slight increase in cubic capacity has hit that figure easier then that may be the casw due to the slight hone and bore when the engine was rebuilt i dont know just a gtr lover who has spent shit loads on my prized possesion.

cheers,

Dave

Edited by Mr GTR-32

The -5s are rated @ 360hp turbo

The -9s are around 320hp turbo

The above are iff memory serves me correct of course haha, been a while since ive got digging. I think we might be onto something here :D

It would be approx 2.5-3 years ago the -9's were not a listed part. So it might be possible.

Also, the -7s & -9's are basically the same response. -9's just make a bit more power :)

Again not saying your result is wrong or anything as your MPH is indeed close. It's an interesting discussuion now you've said you purchased 350hp turbos? :down:

I have found my dyno graph and wsid docket grant will post these up some time when he gets them from me im hopeless at uploading pics etc haha, I defeinately have -9s R31 Nismoid checked my purchase docket as i purchased these through just jap and they are 320hp rated from Garrett.

Slightly slower Mph than i stated as it was a while ago but not far of i got a a 121.64Mph or 196Klms still good for 11 flat if i learn how to launch and go there with good tyres not crap lol.

cheers,

Dave

Hi all,

Dave have sent couple of MMS of the dyno graph and timeslip to me not long ago.

So there it is, you'll need to tilt your head for the graph :/ .

post-13169-1277429048_thumb.jpg

post-13169-1277429082_thumb.jpg

Cheers

Grant

p.s. Man, this is nice curve there.

I have found my dyno graph and wsid docket grant will post these up some time when he gets them from me im hopeless at uploading pics etc haha, I defeinately have -9s R31 Nismoid checked my purchase docket as i purchased these through just jap and they are 320hp rated from Garrett.

Slightly slower Mph than i stated as it was a while ago but not far of i got a a 121.64Mph or 196Klms still good for 11 flat if i learn how to launch and go there with good tyres not crap lol.

cheers,

Dave

Thanks for checking :D

Given the dyno graph is a tad "high" by the IT correction, you have around 320-330rwkw and MPH backs that up nicely.

Good result for 18psi with those turbos!

You are also loosing 2psi towards the top end - you might want to get boost control looked into as it would make it hold even harder to redline if it didn't start falling away after around 5300rpm :miner:

Yeah boost drops of i am running an eboost 2 what would i need to do to hold the boost better change EBC which i dont want to do they are sp damn expensive.

Well i hope this backs up my experiences with the -9s they are awesome, next time round its head work and some -5s been told with some minor head porting and good cams they to hopefully wont be to laggy. But thats a while away for now ill stick with the sharp response of what ive got.

cheers,

Dave

Yeah boost drops of i am running an eboost 2 what would i need to do to hold the boost better change EBC which i dont want to do they are sp damn expensive.

Well i hope this backs up my experiences with the -9s they are awesome, next time round its head work and some -5s been told with some minor head porting and good cams they to hopefully wont be to laggy. But thats a while away for now ill stick with the sharp response of what ive got.

cheers,

Dave

What's the pre-load set to on the waste gates? Are they set to the same pressure?

Are you driving around on the same boost setting all the time?

Straight from turbosmart's website:

the maximium boost pressure (set point), the spool up rate of the turbocharger (gate pressure) and the reaction time of the controller (sensitivity).

You should be able to help level it out using the gate pressure and the sensitivity.

I'm looking at fitting a set of -5's, and I have a question on the side:

My car is already tuned at 18psi, power fc. When I install the -5's am I able to drive the car at WOT within the 10-18 psi bracket before a new tune?

I know that I should (and obviously will) get another tune, but I want to get some cams first before putting $$ into dyno. Just putting the question out there.

If it's related to airflow, instead of boost (AFM's) - Will it drive at WOT using lower boost since (my pure example) the total airflow will still be within the tuned range?

(The way I figured is as long as I stay within the table on the power fc (not too much rpm or air flow) and everything is still safe?)

Edited by GTRPowa

18psi from a pair of -5's and 18psi from say -9's is completely different, sure the intake system is pressurized the same as 18psi, but the -5 will be flowing alot more air than the example -9.. the engine has no idea what psi the turbos are running at, only about how much air is passing through the AFMs

18psi from a pair of -5's and 18psi from say -9's is completely different, sure the intake system is pressurized the same as 18psi, but the -5 will be flowing alot more air than the example -9.. the engine has no idea what psi the turbos are running at, only about how much air is passing through the AFMs

Hence the other half of my question, if I run at a lower boost, whatever amount needed that I'm not going off the charts on my Air Flow resolution on my tune, then it's ok for a temporary basis?

How about you just take it easy like any other person would?

Kepe rev's below 3000-3500rpm until you have time to get it all checked correctly? Best course of action in my book :blush:

Better yet don't drive it at all :blush: is it worth the risk really ?

Also as for -5's with a built motor and some go fast bits I see no reason why 430-460AWKW can't be acheived :blush:

Edited by Nee-san
I'm not familiar with the eboost 2 - but if there are some gain settings to alter, that would likely help.

Talk to your tuner mate, they would have the best idea about it if they set it up initially :blush:

Post 18 of this thread shows my car running an eboost 2. It has rpm input so you should be able to get it to hold full boost all the way to the redline. Mine does. Like Ash says, your tuner should be able to fix this and you shouldn't need another EBC.

http://www.skylinesaustralia.com/forums/St...ds-t280020.html

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

    • I thought I'd do a write up on an auto transmission fluid change for a the nissan 7 speed Automatic. At some stage the genius engineers decided that the fluid in the trans was "for the life of the transmission", (which seems kind of self supporting to me) and removed the dip stick and fill tube (funnily enough there is still a casting for it). Anyway, for this job you do need 2 specialist tools in addition to regular hand tools, jack and good chassis stands. You need a way to pump fluid up to the transmission; I got one of these but there are plenty of other options: https://www.ebay.com.au/itm/364584087070 Don't trust the generic listing though, it does not come with the required adapter for the Nissan 7 Speed. You need one of these, can't do the job without it: https://navarapart.com.au/product/genuine-nissan-patrol-y62-d23-np300-navara-re7-dipstick-fill-connector1 You need a heap of compatible transmission oil. Could be Nissan, could be anything else rated for Nissan Matic S. You need at least 10 litres, I had 15 to give it a better flush... Also, you need some biiig oil catch trays, at least one of these, or bigger if possible (volume was fine, size was very marginal): https://autobarn.com.au/ab/Autobarn-Category/Tools-%26-Garage/Specialty-Tools/Oil-Service/Garage-Tough-Oil-Drain-Pan-Black-16L---GT1068/p/TO03191 Finally, a measuring jug is very useful if your pump does not have volumes marked on it, I got a 6l one: https://www.repco.com.au/oils-fluids/fluid-accessories/measuring-jugs/penrite-measuring-jug-6l-pmj006/p/A5322648 Oh, and gloves.....this stuff is horrible (not as bad as diff oil, but getting there) ....First, jack up your car.....
    • So I mentioned the apprentice, @LachyK helped take the bonnet off. We just undid the nuts on the hinges and unclipped the gas struts, then pulled the bonnet back a little as the front was catching on the front bar.  I had a good look at everything today and have removed the rams, repaired/reset the hinges and bolted it back together like it never happened. I'll do a separate write up on the repair, and I also removed the poppers from the Fuga today too to save grief down the road.....as said above it is at least $5k to repair retail. I'm also happier about my ability to prepare a race car, and less happy about Nis-nault's engineering (I can hear @GTSBoy sAfrican Americaning) because the top hose of the radiator didn't slip off.......it snapped clean off. By practice I put the hose clamp hard up against the flare on a neck to make it least likely to ever move (thanks @Neil!). I guess that puts a little more pressure on the end of the pipe as it is further away from the rad, but still, that is pretty shit. I've put it back on for now as there was a fair bit of neck still there, but obviously there is no lip on the neck any more so I don't think I'll track it again until I have a new rad. Speaking of which....more research required. It looks like Koyo makes a standard size radiator in ally which I'll grab in the meantime, but I really want something thicker so might have to go custom in the medium term (ouch) Coolant still needs a refill and I have the pressure tester on it over night, but other than a wash down of the engine bay it seems alright. And @MBS206 noted something noisy on the front of the engine and I think I agree....time for a new accessory belt and tensioners I think.
    • our good friends at nismo make a diff for it, I have one (and a spare housing to put the centre in) on the way. https://www.nismo.co.jp/products/web_catalogue/lsd/mechanical_lsd_v37.html AMS also make a helical one, but I prefer mechanical for track use in 2wd (I do run a quaife in the front, but not rear of the R32)
    • What are we supposed to be seeing in the photo of the steering angle sensor? The outer housing doesn't turn, right? All the action is on the inside. The real test here is whether or not your car has had the steering put back together by a butcher. When the steering is centred (and we're not caring about the wheel too much here, we're talking about the front wheels, parallel, facing front) then you should have an absolutely even number of turns from centre to left lock and centre to right lock. If there is any difference at all then perhaps the thing has been put back together wrongly, either the steering wheel put on one spline (or more!) off, and the alignment bodged to straighteb the wheel, or the opposite where something silly was done underneath and the wheel put back on crooked to compensate. Nut there isn't actually much evidence that you have such a problem anyway. It is something you can easily measure and test for to find out though. My money is still on the HICAS CU not driving the PS solenoid with the proper PWM signal required to lighten the load at lower speed. If it were me, I would be putting either a multimeter or oscilloscope onto the solenoid terminals and taking it for a drive, looking for the voltage to change. The PWM signal is 0v, 12V, 0V, 12v with ...obviously...modulated pulse width. You should see that as an average voltage somewhere between 0V and 12V, and it should vary with speed. An handheld oscilloscope would be the better tool for this, because they are definitely good enough but there's no telling if any cheap shit multimeter that people have lying around are good enough. You can also directly interfere with the solenoid. If you wire up a little voltage divider with variable resistor on it, and hook the PS solenoid direct to 12V through that, you can manually adjust the voltage to the solenoid and you should be able to make it go ligheter and heavier. If you cannot, then the problem is either the solenoid itself dead, or your description of the steering being "tight" (which I have just been assuming you mean "heavy") could be that you have a mechanical problem in the steering and there is heaps of resistance to movement.
    • Little update  I have shimmed the solenoid on the rack today following Keep it Reets video on YouTube. However my steering is still tight. I have this showing on Nisscan, my steering angle sensor was the closest to 0 degrees (I could get it to 0 degrees by small little tweaks, but the angle was way off centre? I can't figure this out for the life of me. I get no faults through Nisscan. 
×
×
  • Create New...