MintyBlueRX7

Hi everyone my type R has developed an interesting problem. Took it out the other day and fed it some gas up over 3000rpm bit of boost speed climbing fine. Then massive surge of power car seemed to go mental around 4500rpm boost guage was reading 15psi spiking up to 17 realising this was not right came off the power and went home. Next day fed it some gas in 1st n 2nd gear and lost all boost just had the sound of the turbo going round but no power. Looked under the hood saw that i had blew a hose off the intercooler (on retun to the turbo). So i fixed that now im just driving real easy cos i dont know why the boost is climbing that high Even now when i dont drive it hard atall it still goes up to 12 psi with hardly any power applied. Any ideas guys n girls?

Mods Straight through exhaust, Air pump removed. Rebuilt 5000 miles ago by RX Heaven.

scratchjunkie

are you stock? hows the weather where you are?

Madmax670

Please tell me you have a standalone

dgeesaman

iTrader: (7)

Wastegate or Precontrol line popped off - the the line runnign from the 2-nipple tree on the front compressor to the wastegate actuator. Also check the lines running from the actuator up to the solenoids. If there is a leak anywhere along this line, the wastegate will not function and boost will build without control.

Secure it with a zip-tie.

I recommend you do not drive the car until this is resolved.

Dave

scratchjunkie

your over boosting because you have a straight exhaust.

MintyBlueRX7

Weather aint too good at the mo! will check the lines and see if the waste gate is opperating as it should cheers Dave

gotorx7

We found it almost impossible to reliably control the boost with Twins and a straightthrough exhaust.

I'd suggest putting some restriction back into the exhaust, or be prepared to spend big bucks chasing your tail.

I ended up going Haltech E11, Single Turbo, External Wastegate... it goes on.. and on ... and on.. (good fun though!)

DaveW

You have boost creep - i.e., the wastegate is unable(it needs porting, etc,) to control the boost with the straight through exhaust. Do a search for boost creep...

You are also in trouble by running lean if you're still on the stock ECU.

Please proceed cautiously, or you will blow your engine due to detonation from running lean.

Cgotto6

iTrader: (8)

So in other words you couldnt find the problem your car had...So you took the easy route and spent thousands for a single?

dgeesaman

iTrader: (7)

Oh yeah, if you just installed the straight-thru exhaust you might see boost creep even if everything is working 'right'. I'm glad the others caught that. It's a big no-no on a stock ECU, and still dangerous on a programmable ECU.

gotorx7

Yeah, basically

It's where I wanted to go anyway...

MintyBlueRX7

Spoke to a rotary specialist today and they said that i could run a straight through exhaust / no air pump with an apexi power fc quite safely. Still trying to find my way around the car only had it 2 weeks used to have a Mitsi Evo so this is quite different!!! Fantastic site this found out loads of usefull info better than anything in the UK! Are there any other mods you guys can recommend if i get the apexi power fc to make things safer or will it run ok on that set up with extensive mapping?

CHEERS!! :

Kento

The PFC is one of the best mods that will allow you to run all sorts of mods safely, but the key is tuning it correctly. Otherwise, you could be dancing blindfolded in a minefield if you or the person tuning it don't know how to do it properly. You'll need a good wideband O2 sensor and Datalogit software program to get started (search on this subject and the PFC forum and you should find some answers).

MintyBlueRX7

Cheers for the advice Kento found a decent recomended garage that are gonna fit and tune it correctly got quoted over £1000 for the supply fit and mapping so it better be good!!!

dgeesaman

iTrader: (7)

This is possible IF the boost does not creep. Which it often does when a midpipe is installed. If you get creep, you'll need to port the wastegate, which means taking the turbos off, unbolting the halves, and grinding a larger hole at the wastegate. It's a chunk of labor to pay a shop for, but not bad if you buy the turbos ported or DIY.

Dave

Retserof

iTrader: (1)

£1000 is nearly $1,770.00 US!

TwinTurbo93

Porting the wastegate will help some, not eliminate the problem completely though.
You will ned to get the PFC or other standalone asap to compensate for the extra airfllow,

I'd also suggest an elec. boost controler to help more cotroling the boost and keeping it at desired psi/bar because the stock solenoid is not gonna do much with a free flowing exhaust.

If you must drive the car till you get all the necessary stuff to run safely, make sure you stay off boost, monitor the boost gauge frequenly and take it easy if you wish to keep that motor healthy.