Jump to content
SAU Community

Recommended Posts

for the last 6 months ive had a 2535 on my series 1 rb25 running 15psi and putting out 231kw.

the car is punchy and makes full boost by 3200rpm but i want it to feel more aggressive and come on boost more rapidly and maybe earlier. (it feels like a vtec, very safe tune)

I think these are my options:

*bigger 550cc injectors and run a more aggresive tune

*exhaust cam gear

*split dump pipe

does anyone else have any ideas how i can make my car more aggressive out of the corners?

I'm a sook, i cant handle any lag

Link to comment
https://www.sau.com.au/forums/topic/108919-hitting-boost-quicker/
Share on other sites

Hahah 2535 Lag?

I loved the 2535 on my RB25, it hauled ass!

I don't know about yours but mine came on boost very suddenly and sharply!

I had EBC, Split dump, FMIC and SAFC-II :P

ps I would go for the split dump - while running stock dump with my 2535 it was woeful! - Best $$$ spent was on Split dump

Seems to be a recurring theme with the rb20 and rb25, this lag problem.

With how cheap turbos and exhaust manifolds are getting nowadays, I wonder if a twin turbo kit could be mass produced with two tiny turbos to virtually eliminate all lag.

Just a thought.

3inch turbo back exhaust, split dump setup

aftermarket engine management (powerfc)

injectors wont help at all

a pair of tomei cam's

a good cold air intake

make sure you dont have a big stupid 800x400 FMIC

ive already tuned the first 8X8 cells in a very similar fashion, it made a difference to economy and the transition between off-boost and coming on.

that table u have displayed paulr33 looks like the stock ignition table??

will an exhaust cam gear make the mid range much more punchy???

Edited by reflex

well if you've done the ign timing then theres probably not a great deal more you can do. i dont think cam gears will give you 2 tenths of fark all. yeah i posted the stock ign table to see if you were still running that (some tuners don't touch the low area).

wind that boost up!!!!! you wont even have time to look at the tacho if you wind about 17 - 18psi into the 2535... the difference on mine was amazing from 14 psi to 18psi....

The power was very smooth and progressive before but now you can feel a strong surge of power then BANG!!! she pulls and pulls!! i love it!

if your in my area, ill take you for a spin if you like or if your at then next vic event??

If your wastegate was opening at idle, would explain why you're disappointed with power output!

My suggestion, after reading that comment, is to take ur ride to a mechanic and get it fully inspected, to make sure everything is running right. No use flogging a dead horse.

a good way to see if thats the case or not is to

unplug the actuator line and do a dyno run (be sure to watch boost) and immediately back off when target boost is reached, cos you will be in unlimited boost mode.

then do another dyno run with the actuator connected again like normal and let it run. then overlay the two dyno runs plotting only boost and see if they are the same. if they arent then the actuator is leaking or opening too early

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...