Hitting Boost Quicker

[reflex]

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

[ix9]

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

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

[Johnny Cash]

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.

[gel]

Anti-lag system...

I had it on my WRX and works and sounds great!

I had Autronics SMC with Anti-lag.

[reflex]

ive got a 3 inch zorst from the turbo back, i just want it to come on harder

it still spins all the way thru 2nd but i want more

boredom is a killa!!!

[justin911]

sell me your 2535 and buy a new turbo

(seriously )

[paulr33]

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

[reflex]

i have a power fc, z32 afm, 600*300*76 fmic

how can i make it more responsive

[paulr33]

how has it been tuned?

ignition timing will help it come on a bit earlier

[mokompri]

i doubt cams will give you more bottom end, but will help mid range and top end

your at a stage where if you want more response you may want to look at a lightened flywheel or something along those lines, your turbo is damn small already !

[paulr33]

on the hand controller goto

SETTING, IGN MAP

do the first 7x7 cells look like this ?

[reflex]

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 March 9, 2006 by reflex

[paulr33]

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).

[silva33]

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??

[rb26s13]

pon cams maybe?

[maccattack]

Port and polish the head - full flow tested.

Had mine done late last year. Combined with Tomei cams my waste gate is bouncing open on idle.

Brings on boost way earlier.

[Bass Junky]

Maccattack.

Your wastegate is opening at idle?

Are you serious?

Surely not.

[Johnny Cash]

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.

[TTT]

to the author..

what boost controller do you have?

[paulr33]

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