Late Night Boosting

[Haysey]

Hey all,,

well with the recent cold weather and our turbo cars going harder, ive got a Q...

how much damage will the spiking do late at night.

Example. during the day my car is set on 11psi (r32gtst) and when i was driving home tonight (around 13deg outside) it was hitting 13.5psi.... now i know the turbo will shit itself after 14, so should i be worried or is this a good thing, can someone explain the situation to me please

thanks

Ed

[Stel]

Yeh i am getting spikes as well at night....

I had it set to 12 psi and it jumped to 15.5.

Car just started spluttering so i just turned it down.

I guess best thing to do is adjust it now that winter is coming to 9 psi on a normal day and you may jump up to 11.5 on a cold night....

What are you using to control boost?

Ive got the Turbotech controller.

An EBC would surely fix the problem?

[mazgtr]

Yes, an electronic boost controller will be more consistant at maintaining your determined boost level. The manual boost controller is effected by atmospheric conditions.

Edited May 9, 2006 by mazgtr

[The Mafia]

Turbos don't just go "whoops, 14psi, better go bang" etc

Going that high will only encourage it to go bang. Any standard skyline turbo forced to make more boost than standard risks going bang.

As for the boost spiking... ITS BAD.

If you have a tune set to a certain psi and it spikes, this could potentioally lean out the motor and make the entire motor go bang.

If your spiking, wind your boost back, if you want your car to stay in one piece.

oh, and an electronic boost controller will help prevent spiking.

[WazR32GTSt]

how long are you hitting full boost for on a cold night?

if its a drive home from work, probably never, maybe 5secs maximum over the course of a 15min trip

if you are worried, then don't sit at full boost for long. if you want to give it some stick, then drive mroe sedately afterwards

as someone already said, there's no program in the ECU that makes the turbo shit itself at 14psi.. its just one of many risk factors for the turbo going bye-bye

[nuffsaid]

Same thing is happening to me, boosting close to 1kg/cm (on my 34 GTT stock gauge). Dont know how accurate this is though.

Can I electronic boost controller really control this? I always thought that the boost control was always limited to how the wastegate/actuator performs.

I have no boost controller installed, just a very hi flowing exhaust.

Kinda scared of blowing things up seeing as R34 turbos are very fragile, perhaps my stock boost guage is way innaccurate!?

[WazR32GTSt]

when i installed my aftermarket gauge, i noticed that, yes it was easier to read as its large and in psi (rather than small and in mmHg)

but it responds exactly as the stock one does, and shows no difference in its reading

moral of the story: your stock gauge is FINE.

[nuffsaid]

when i installed my aftermarket gauge, i noticed that, yes it was easier to read as its large and in psi (rather than small and in mmHg)

but it responds exactly as the stock one does, and shows no difference in its reading

moral of the story: your stock gauge is FINE.

Thats strange, prior to my full exhaust, it was reading 0.55kg/cm.

And after the exhaust, close to 1kg/cm.

I dont see how a full exhaust on a cold night can make almost double the boost.

[The Mafia]

with a 5psi actuator, full exhaust, and FMIC, I was spiking to 14psi..