Just Done Nistune!

[GTSBoy]

But mine is getting boost cut!!! Does urs??

It's not "boost cut". Read what has been written above again.

[myRB25DETT]

It's not "boost cut". Read what has been written above again.

Posted Today, 12:15 AM

Sounds like you hit the TP cut (what others call boost cut). Running that much boost will pull enough air flow through the AFM for the ECU to freak out. Nistune allows you to push the cut point up higher, but your tuner may not have done so.

By the way, I agree that 13 psi is risky on an RB25 turbo. <--- thats ur wording there... TP cut , boost cut or whatever it is...

Edited July 13, 2011 by myRB25DETT

[djvoodoo]

But mine is getting boost cut!!! Does urs??

Ahh, forgot to answer that, No boost cut, Toshi had changed the map so boost cut was at 14psi

[rondofj]

how much torque did u make dude? i also made low power 187rwkw on my GTT lol - same mods as u, 12psi

[Hanaldo]

If it's TP cutting with the NIStune then it either hasn't been setup right or there is something wrong. Go speak to the tuner, they will know.

[djvoodoo]

how much torque did u make dude? i also made low power 187rwkw on my GTT lol - same mods as u, 12psi

How much torque did I make or myRB25dett???

Mine was peak of 486 I think from memory, can't remember at what rev range though. I did lose top end power as the boost dropped in the higher rev range

[myRB25DETT]

How much torque did I make or myRB25dett???

Mine was peak of 486 I think from memory, can't remember at what rev range though. I did lose top end power as the boost dropped in the higher rev range

Cant remember mine.. Think below 400

Edited July 13, 2011 by myRB25DETT

[djvoodoo]

Toshi had tuned mine rich (11.5 ish and drops to 11 at 7000rpm) and lots of timing rather than lean, so I had a really good torque band mid range, plus the way I've set the gain, start boost on my Greddy may have an influence how boost comes on and where it makes it's power.

[045HOW]

How many people in here actually have an RB25DETT???? lol..

[STATUS]

it will be the boost controller, i set the cut pretty close to the set level as it seemed to have great control, id say on the highway its gettin a little creep, drop the set % down 3 or 4 points. There is a boost TP cut in the ecu but it is @ 18psi and there is ZERO chance of it getting close to that.

as for 13 psi max it is NOT an issue. as boost blleds off to about 10-11 psi from 3500rwpm on all r34's.

NO R34 has EVER made over 210rwkw on my dyno with only fmic and exhaust (more than 20 done so far), most make 190-200rwkw @ 12-13psi..... no failures as yet 3yrs on.

[blah_blah]

My car made around 200rwkw on Trent's Dyno with a Nistune ECU, Turbo back exhaust, FMIC and Turbotech boost controller at about 12psi.

[STATUS]

My car made around 200rwkw on Trent's Dyno with a Nistune ECU, Turbo back exhaust, FMIC and Turbotech boost controller at about 12psi.

spot on the money.

[myRB25DETT]

Hi trent, tried calling ur shops and left voice msgs, seems u guys busy, what should i do to get rid of the tp cut?? Cant really use high boost as it happens 3x now...let me know..

[simpletool]

Trent let you know 3 posts above. Reset the boost controller (high setting) down about 3 or 4 points.

Just google how to set your boost controller.

[GTSBoy]

<--- thats ur wording there... TP cut , boost cut or whatever it is...

Yuh, but that's the point.....because it's not actually caused by boost. If you wound the boost up to 15 psi but put a 1" restriction on your exhaust, the TP cut wouldn't come in. If you ported it, bigger valves etc, you may well be able to get it to happen at 10psi.

[DVS JEZ]

Trent has done the right thing by setting the tp cut so when the car does overboost it is protected.

As annoying as it is to drop the boost a little it is much better than destroying a turbo or motor.

[Torques]

How much torque did I make or myRB25dett???

Mine was peak of 486 I think from memory

That's nm, not ftlb, righ?

[Paulie C]

Hey ya'll

Just had a Garrett Gt 30 turbo, 650cc injectors, Z32 airflow meter put in my R34 GTT RB25DET with other mods put in before

Greddy FMIC

Xforce exhaust system

Walbro fuel pump

Turbosmart boost controller

Nistune

Podfilter

Currently running 214rwkw or 287hp. My tuner and mechanic is Andy at Hyperdrive in Malaga W.A.

Now he came across a small issue, that prevented the engine not reaching its potential, as closely as i recall he said that while he was tuning it he had set the boost to 13 but then it would go back down to 9 then work its way back to 13. The power from the turbo doesn't kick in until bout 3000-3500rpm, and he wants it to come on in that mid range of 2000-25000rpm, so that the engine can get what he estimated which was about 310-320hp. Andys told me hes calling up the turbo and boost controller peeps to see what they say, but anyone who has dealt with Andy knows he doesn't mess around with ya car.

If anyone who knows what the issue is, or what it could possibly be let me or Andy know. Cheers

[Hanaldo]

Has Andy got his dyno going properly yet or is he still going to Mick?

[djvoodoo]

That's nm, not ftlb, righ?

Correct!