Jump to content
SAU Community

Recommended Posts

  • Replies 56
  • Created
  • Last Reply

Top Posters In This Topic

Tooo many haters on here.

Rohan, you just need to be smart about it dude. Decent boost controller and/or bleed valve to make sure it doesnt spike. Heat wrapping or turbo bag to protect from the heat of the turbo. Run good oil and fluids, but most importantly make sure you warm up and cool down your car properly.

You are getting towards the limit of your turbo with 1.3 bar, but if you do the small things there is no reason why you should enjoy many happy hours of drifting.

i think i might leave it @ 1 bar with no boost controller, and then hi flow it later and then put the 17psi spring setup in, to keep everyone here happy lol

on 1 bar it bogs sometimes, on 1.1bar it keeps spinning.. which is why i wanted to try it out... i wanna run boost off the gate thus i sold my boost controller...

Can you explain this for us Nismoid?

Boost is just a measure of the resistance of the head, for the shaft to spin quicker on an RB20 there must be less resistance...

I'm no RB20 expert, but what you're saying is the RB20 head flows better than the RB25 head?

If you have 12psi, do you think the turbo is spinning as fast as when its making 17psi?

Nope.

Kyebidz - a turbo beanie is the worst idea one could suggest, right up there with a Bee-r limiter!

Tthe hotter the housing and turbine wheel - the more prone to failure the exhaust wheel is going to be.

Stunn-R try getting a remap or an aftermarket ECU...

also, I think you're more suited on nissansilvia.

running 17PSI on a R33 Turbo, on a RB20 with stock AFM and stock injectors, you got to be kidding.

Is it me? or are there more nissansilvia kids on the SAU forum, some tool just posted this up "Blanking Off Bov" http://www.skylinesaustralia.com/forums/Bl...ov-t279384.html

If you have 12psi, do you think the turbo is spinning as fast as when its making 17psi?

Nope.

Depends how restrictive the head is?

That was kinda my point.

On the same motor, with the same head, with the same turbo and no change in restriction, then of course 17psi is going to require a faster shaft speed. If you were to port the head without touching the turbo, then you would see the same power with lower boost figures (it's about airflow, not "boost").

Boost is ONLY a measure of head restriction, not a measure of shaft speed. Comparing boost levels on different motors with different heads is pointless when trying to determine shaft speed.

lol johhny its not rohan haha

rohan doesnt have a 32 lol

come to a cruise or pm me your number and you canmeet me! i wanna see how keyboard warrioorrrrrRR you are in person lol

Run it at 18psi :iluvff: I had a series 1 25 turbo and ran it at 18psi for about 8 months and never had an issue with it. Even when I pulled the motor out I had a look at the turbo and it seemed happy.

But, if you cant afford to fix it if it does break, then run 12psi. Be smart about it :D

Kyebidz - a turbo beanie is the worst idea one could suggest, right up there with a Bee-r limiter!

Tthe hotter the housing and turbine wheel - the more prone to failure the exhaust wheel is going to be.

the sarcasm of his post must of been lost on you!

we got a neo turbo on a 20det . been thrashing it for ages on 14 psi . have had it glowing red after a boost round the hills . it seems to love it . it doesnt glow anywhere near as good as the 20 turbo used to . yeah not much piont in runnin any more on a stock ecu . but yeah your already pushin more yeah . good shit man . need more threads with "do ers " and not the hot air brigade

Depends how restrictive the head is?

That was kinda my point.

On the same motor, with the same head, with the same turbo and no change in restriction, then of course 17psi is going to require a faster shaft speed. If you were to port the head without touching the turbo, then you would see the same power with lower boost figures (it's about airflow, not "boost").

Boost is ONLY a measure of head restriction, not a measure of shaft speed. Comparing boost levels on different motors with different heads is pointless when trying to determine shaft speed.

Well generally people say the RB20 head is about 30% down on the 25 head.

12 + 3.6 = 15.6... 1.5-2.5psi off the target still

So i say higher shaft speed.

Well generally people say the RB20 head is about 30% down on the 25 head.

12 + 3.6 = 15.6... 1.5-2.5psi off the target still

So i say higher shaft speed.

So you agree that this statement:

i reckon you can run more boost through a 33 turbs on a rb20 compared to a 25 zebra so im gonna have to disagree with you there buddy :P

is absolute rubbish?

For a while there it seemed like you were trying to tell us that 15psi on an RB20 means higher shaft speed than 15psi on an RB25....

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

    • Thanks Dose.....    I appreciate it!!
    • I'll probably be putting the shit box back on the dyno again soon, I want to dial in the closed loop boost control properly. I'll have a camera facing the car/motor for fun too. Just note, there are essentially 3x 10AN inlets going into the catch can and 1x going back to the intake pipe. Most of the time the catch can "return" to the sump actually is the crank case breather, pushing air out.
    • I have the R3C with a Nismo slave and by no means does it behave like a stocker, it ain’t THAT bad. On take off just give a bit more throttle than you would say a coppermix and it’s fine. It will not slip though.   
    • Okay. Final round of testing done. Got a friend to hook up a fancy scanner to the car and we also ran some compression and leakdown tests, she is healthy.  The MAF was definitely the culprit. So for future reference anyone with similar issues that find this thread. I suggest the following steps, in order of affordability:   Check your spark plugs for any fouling, replace plugs if they are bad or re adjust the gaps making it narrower (0.8mm would be good). Check every coil's resistance with a multimeter. It can be done by probing the IB and G pins on the coil pack. Resistance should be around 1.4 (+/- 0.1) Ohms Check the MAF. If you have Nissan connect or a good scanner with the 14 adapter it should allow you to see the voltage on the MAF reading should be around 1.1 - 1.2V when car is idling. But if you don't, buy a new MAF from Amazon and test, then return it. (For instance, I got a Chinese one for $40 that was reporting 1.3v on idle). If you still have scanner, you can run tests on the injectors to see if they are working, just remember to unplug the fuel pump fuse/relay and have no pressure on the line. Then listen for the noises that the injectors make. Clean/replace injectors as needed. Once you find the issue and fix, order thousands of dollars worth of OEM parts to refresh unrelated things (Optional)   PS: Thanks to the absolute legends of this forum for the responses and help to someone that went a bit over their head. (me)
    • Ha ha ha, so they stopped the bearings spinning on the one you want, but then decided the crank hub should slip instead 😛   Stick to RB, at least you can work on it yourself. And now it doesn't smell of vapour   Also I still believe there's a chance your new flap doesn't "pop", as even though the engine might breath hard, it has a direct path with no restriction to the inlet, which when on boost should pull a bit of suction for you. If you do get pressure in the catch can id be very intrigued. Time to put a boost gauge on it, and a session at the track, then solid cover your vent and do another session
×
×
  • Create New...