Jump to content
SAU Community

Recommended Posts

Hi, i have a rb25 ready to replace my RB20.

Its running standard internals, with a match ported and polished head, Haltech computer, FMIC, 3 inch exhaust, etc,

i was going to go a big turbo and external gate but i cant be bothered now. A mate mentioned the HKS2540.

anyone know what power they are good for with the above setup on 1.3 or 1.4 bar, and when will it come on boost.

Link to comment
https://www.sau.com.au/forums/topic/26005-hks-2540-on-rb25-what-to-expect/
Share on other sites

Good choice, I have one on my RB25DET, Since they are one of the largest low mount turbos, you wont get hassled (too much) by the cops.. They already have steel wheels and are ball bearing turbos... Brand new they cost around 4500 - 5000. (Many ballistic Jap Street GTR's use 2540's, where as the Drag GTR's use 3240's..)

My car isin't tuned yet, but is making 300 HP (220KW) at the rear wheels on 15 psi.. Once It is fully tuned and the boost set to 22psi, The Turbo can push out 280KW at the wheels... It would be struggling to make much more than that... The 2540 is a very responsive turbo (relativley) and spools up quickly..

I have a full 600+ Engine (Forgies/rods/cranks/o-ringed) etc And I could easily run 25psi and a bigger turbo.. (400KW at the rears!) but It would be good for the track only... Thats why Im keeping the 2540..

Details of my setup can be found at

www.geocities.com/r33forsale

Because, I spent over 10K getting the engine done & running a bit low on cash - The car is for sale... a 3040 would easily make over 300KW atw, but isint all that responsive, its not terrible, but a fair bit more laggy, and as you can imagine traction is already a problem with the current power output.. (To fully utilise the 3040, potential, I would have to get nittos, softer the hard suspension - for better squatting off the line, and the cost of the turbo & manifold - All that would cost at least 7K!!)

Guest INASNT
Originally posted by mose

Because, I spent over 10K getting the engine done & running a bit low on cash - The car is for sale... a 3040 would easily make over 300KW atw, but isint all that responsive,  its not terrible, but a fair bit more laggy, and as you can imagine traction is already a problem with the current power output.. (To fully utilise the 3040, potential, I would have to get nittos, softer the hard suspension - for better squatting off the line, and the cost of the turbo & manifold - All that would cost at least 7K!!)

I hear what u r saying coz i just spent around 10g on mods 2 and am getting a custom garrett 550-600hp turbo made to my specs.

The 2540 will never make enough power to cause the stock internals any problems. U will be quite surprised how responsive a high mount 3037 with custom manifold is compared to your 2540 on the stock manifold.

I will make u the same deal as steve :D

UR right about the 2540, the stock engine will handle it with no dramas... BUt I was intent on have a super reliable car - peace of mind - (EXPENSIVE peace of mind!!)

He he - out of curiousity, what how big would be "cash adjustment" be - ( My new super tough motor has only 2,500 k on it & I have reciepts for 11K...)

At the end of the day, its your engine, tell us what you think would be fair. If you are selling your car you are mad to leave a fully prepped engine in there - what is the asking price for your car? Also, why are you doing the turbo if you are selling it? (your car)

Steve,

Im not planning on selling the prepped engine, I was just curious about the interest on it.. I never said I was doing the turbo either(That was INASNT), I was commenting that my car is capable of handling a more powerful turbo (internals etc) AND commenting on the GT2540'sin this thread...

INASNT,

To give you a rough idea of how my engine costed that much, here is what I had done (that comes to mind) -

Forged Pistons, Rods, Crank, O-Ringed, Chem Cleaned & crack tested block, Sard Injectors, High Flow Radiator, Full Head Service, ARP bolts , New Gasket sets, Balancing, NGK Plugs, Fuel Reg, and LABOUR etc - I have a full recipet that I will scan in (for info purposes - Its around here somewhere!) BUT, I agree that I SHOULD have done the engine work in Sydney or something.. (It was done here in the ACT, by Skyline Performance, Mitchell - which turned out to be more convenient, but more expensive )

mose, sorry - chalk that up to assumption :( With forged pistons, prepped rods and crank, balance etc you should be good for 25lbs+ boost with the right ecu etc. Seems a shame you dont get a GT30 or similar and wind in 20 or so pounds and have a blast before you sell it - god I would be itching:)

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

    • Even more fun, leave all the ADAS stuff plugged in, but in different locations, hopefully avoid any codes!   And honestly, all these new cars with their weird electronics. Pull all the electronics out Duncan, and just shove an aftermarket ECU and if needed a trans controller in, along with a PDM. Make it run basic but race car styled!
    • To follow up a question from earlier too since I had the front bar off again (fking!) This is what is between the bumper and the drivers side wheel And this is the navigator side, only one thing but its a biggy! So basically....no putting coolers in the wheel arches without a lot of moving other stuff. Assuming I move to properly race prepping this car I'll take that job on and see how the computers respond to removing a whole bunch of ADAS modules
    • So I prepped the car for another track day on Wednesday (will be interesting to see coolant temps post flushing out and the larger reservoir, with a forecast of 3-14 being 20o cooler than last time I took it out). Couple of things to mention; since I am just driving the car and not taking a support vehicle, I took the rear seats out and just loaded the back up Team Trackday style. Look at all that space! To cover off removing the rear seat....it is weird (note the hybrid is probably different because it wouldn't have folding rear seats) Basically, you remove the lower seat base, very similar to a r series but it is a clip that pulls forward to release the base rather than it being bolted down. Easy Then, you need to remove the side section of the rear seat on each side. There is a 14mm head nut at the bottom of the side piece, the it slides upwards off a hook at the top to release; you also need to unhook the seatbelt from the loop at the top. Then the centre piece is weird. You need to release/fold the seats forward with the tab in the boot on each side From there, there are 2,x12mm headed bolts holding the rear of each seat to the folding bracket, under the trim between the rear seat and the boot (4x christmas tree clips there, they suck). The seat is out but you can see where the bolts attach to the bracket
    • As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
    • I would put a fuel pressure gauge between the filter and the fuel rail, see if it's maintaining good fuel pressure at idle going up to the point when it stalls. Do you see any strange behavior in commanded fuel leading up to the point when it stalls? You might have to start going through the service manual and doing a long list of sensor tests if it's not the fuel system for whatever reason.
×
×
  • Create New...