Jump to content
SAU Community

Recommended Posts

I have purchased a Sliding Performance RB25 hiflow for RB20 and will be installing it on my RB20det over the weekend and thought as there was no results on them with RB20det's I will post all my results here.

The turbo arrived as soon as Aaron promised and my first opinions are it is a good quality product. The machining and finish is very high quality and the CHRA came filled with fully synthetic oil. Both the compressor and turbine are new as well as the whole shaft, bearings and carteridge.

Here are some photos.

100_1180.jpg

100_1179.jpg

100_1178.jpg

100_1177.jpg

100_1176.jpg

100_1175.jpg

100_1174.jpg

100_1173.jpg

The turbo will be going on a mildly modified RB20det with approx 100,000K's and the following

RB20 turbo wastegate

BOS importing split dump/front pipe

3" meatalcat

2.75" kakimoto JASMA approved catback (will be upgrading to 3" later)

TRUST tube and fin FMIC

GTR 444cc injectors

GTR fuel pump

Remapped factory ECU

pneumatic/mechanical turbotech boost controller

NGK copper plugs gapped to 0.9 (factory coils still in good condition)

Stock cams, airbox, BOV, panel filter.

Other modifications to come will also be 1.5 way mechanical diff and brass button clutch.

I will not have a chance to dyno the car and make adjustments to the timing and fuel map untill next Thursday but will post the results once done. currently I estimate the car is making around 140RWKW. I am hoping for 210RWKW once installed.

Will keep you all posted :(

Cheers

  • Replies 231
  • Created
  • Last Reply

Top Posters In This Topic

yeah it's funny. I think it is because the snout is tapered it actually looks a lot more bored than it actually is. There is a good bit of meat left on the snout. it just looks super thin in the photos :(

I may have ot re estimate my initial power estimate after calculating the flow of the 2.75" exhaust compared to a 3". I worked out it will flow 19% less than a 3"

If I am wrong please feel free to correct me. but I think it will be a fairly large restriction and I will not have the time or money to replace it untill after the dyno is done.

but we will see how it goes.

Edited by CEF11E

I think you will reach 200rwkws (all depends on the boost you run I guess) with all the mods you have said. You will need to sort out your ecu as you menioned and once thats done I dont see why you cant get what you want even with the 2.75 " exuast. Anymore than about 200-210rwkws you will need to add a z32 as the stock afm will be running out of resolution.

I have the very same turbo, and am equally impressed with the finish and quality of the product.

I just installed it on my RB20 with similar mods but stock ecu. Suppose to be getting a dyno and remap tomorrow but this isnt happening now, so im going to run a remap ecu from a similar turbo until i can get to a dyno.

its pretty laggy on a stock ECU map i can say that much!`

I'm very interested in doing this turbo thing too. Also got a cef, so quite eager to see the results.

Without trying to hi-jack the thread, what do you call 'pretty laggy' simon?

haha arent all rb20's laggy. I had a 2530 on mine in the old sil80 and damn it felt laggy in comparison to a mates sr with a 2530. Pissed me off cause i hate sr's. RB's FOREVER :)

Im guessing full boost by about 4500??

lol, mine hopefully is being milled up today :P

hope to get it installed onto the Stagea within the next few weeks, but we'll have to see what I can get organised - healing from the patellectomy so cant drive for a while yet. :laugh:

Not sure about the oil feed yet. I am going to take mine off first thing saturday morning and head over to pirtek with it and the 2 banjo bolts. will either get a nre braided one made up or mod mine to suit. The banjo bolts have to be drilled out to 6mm and the banjo fittings need to be drilled out to 5mm.

I do have the tools but would rather a pro did it. :laugh:

Interesting to hear about your braided line pricing/specs if you go for that option :)

I want a new turbo too - but dam the delay from Sliding :D:P :P

Just grab another turbo, I have a spare waiting for the hi-flo treatment. Perfect working order, swapped a set of stock R33 wheels for it ;)

wasnt able to get to the dyno today, so i had Jeff from The Speed Lab put my cefiro remap that was suited to the KKR 430 onto my r32, while not perfect its still better then running the stock map with this turbo.

the ceffy remap was tuned for 16-17 psi, but for safety until i get the car onto the duyno, im running 1 bar.

Im getting full boost at over 4000 rpm but before 4500. from then on it pulls extremally hard,

Comparing to my cefiro, which had 200 rwkw, this feels slightly quicker.

The downside is that offboost and while its trying to build boost down low in the rpm range its bloody slow lol.

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

    • Does that German restaurant still exist in the old place out the NW end of Goulburn? When I say "out the NW end of"...I am really being vague. It was 1997 when I was last there, and the only point of reference I can recall is that it was on the opposite side of the main drag from the big merino. And when I say "opposite side of the main drag", I don't mean "on the main drag". It was either a couple of streets back from there, or might have even been out in the sticks a bit further. Was an old farm building or mill or somesuch. And when I say "the big merino" I might actually be thinking of a completely different part of town, because I just looked on maps and the big bugger is not where I remembered him to be! The food was good, consisting largely of various German mystery-meat sausage/loaf things and kartofflen.
    • So while the second sentence is completely correct and the whole point of the conversation, the first sentence bears consideration. If this bloke is just hoping to throw big turbos on and drive it around, because there are no helpful facilities at all in his tropical paradise** then he likely has zero chance of even knowing what the TP is on the last column in the stock maps, let alone know whether the ECU is operating anywhere near it or past it. So the point is very very moot. And, per what I said before, at stock boost on those turbos, you may well be off the end of the map. **I'm just back from Vanuatu, so I know exactly what small Pacific nations can be like wrt paradise without requisite facilities. But it's not even that simple. I put a high flow on my car and had to drive it around with a proper tune because of the lack of opportunity*** to put the bigger AFM and injectors into it to allow it to be tuned. I had to turn the boost down to less than I had before, and back off the boost controller's ramp, because it was exploring parts of the map that it didn't drive in before, and really couldn't access for tuning on the dyno either, and so was pinging. It was still well within the last column, because when I first**** set up the Nistune on the Neo I rescaled all axes of the maps to give some more space to explore. ***Family dyno was broken ****This was 13 years ago, and the TIM thing wasn't a thing then and so TP would definitely grow when pushing past the stock tune's limits.
    • Yep, this bit another local owner. I caught it before putting the transmission back into the car, what I noticed was the pressure plate fingers weren't flat and even. It's more obvious with the pull style clutch because the throwout bearing ring was visibly not flat once everything is put together. Nismo should really update their instructions to call out this specific detail. I'm not even sure the clutch as-shipped orients everything properly.
    • It ended up being that orientation of the float hub in relation to the clutch disk, when I installed it, I heard a loud click and being stupid, I decided to not take it a part and check it. The hub didn't properly align with the clutch disk and was causing the issue. Definitely an odd one! Dahtone Racing was able to fix me right up, stand up blokes!      
    • Right, but I'm saying on the stock ECU measured airmass from the MAF is no higher than stock. So it's accounting for the higher flow rate iso-manifold pressure. You just have to keep turning down the boost until you're within the stock tune's load scale. If you run off the end there's no telling what will happen. This does mean there's zero benefit to the turbos you're running vs stock, if anything it's just a straight downgrade because the transient response is worse, you don't even get the ECU's boost solenoid helping to pull the wastegate closed during initial spool, and peak power is only whatever the factory map can give you before you hit the R&R corner. On a -9 I would bet that you would have to change out the wastegate spring once you have a real ECU and you're tuning it for real. I'm not saying this is a remotely ideal state of affairs, it's just a way to keep it driveable until you can get a proper tune done.
×
×
  • Create New...