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Is It Possible To Disable A Turbo?

supraaah

By supraaah,
in Engines & Forced Induction

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supraaah Contributor

supraaah

Posted
Posted (edited)

Hey all never thought about this and if its possible, but im thinking of flying over east next week to buy a car, and was actually thinking while im at it, drive the car back to perth myself and make it a road trip instead of getting it shipped here, would cost me the same with fuel i know but would be more itneresting. anyway.....

My question is...is there any way to disable a turbo on an r34? maybe pull some boost hose out or sumthing? seems abit useless for the turbo to be constantly spooling on a 3000km journey.

Any ideas?

cheers

Edited by supraaah
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supraaah Contributor

supraaah

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  • Author
Posted (edited)
cruising it will probably not even be making positive pressure, it will be fine.

the way to 'disable' it would be to wire open the wastegate.

well lets just say im in 5th gear and not quite doing the speed limit, it would be spooling up abit wouldnt it? i mean the nallabor plain is a long road my foot might accidently get stuck on the accelerator.

any idea where the wastegate is? and if that would be a viable option?

BTW- i have an external wastegate on my supra (50mm chinese HKS copy) which has seized open, and my turbo still spools up, so wouldnt that be the same principal ur on about? in which case turbo still spools.

Edited by supraaah
thrtytwo Veteran

thrtytwo

Posted
Posted
well lets just say im in 5th gear and not quite doing the speed limit, it would be spooling up abit wouldnt it? i mean the nallabor plain is a long road my foot might accidently get stuck on the accelerator.

any idea where the wastegate is? and if that would be a viable option?

BTW- i have an external wastegate on my supra (50mm chinese HKS copy) which has seized open, and my turbo still spools up, so wouldnt that be the same principal ur on about? in which case turbo still spools.

if your wastegate is seized open how are you getting boost ? dont they vent excess boost ? meaning if its open before you reach set boost level it wont go anywhere

rb26s13 Mentor

rb26s13

Posted
Posted (edited)

you would use more fuel by "Disabling" the turbo for your trip than you would using the thing.. and even if your cruising along at 160kph you shouldnt be seeing much boost to maintain a cetain speed if any at all

remember.. if you disable your turbo it will be a gutless bucket of junk to drive!!!

Edited by rb26s13
Dale FZ1 Veteran

Dale FZ1

Posted
Posted
You're nuts mate. If you don't want a functioning turbo don't buy a turbo car. If you do buy one just drive it. That's what they were built for.

I second this. Drive the thing, you will soon find it doesn't just boost when on steady state cruise.

Best way to disable a turbo? Tip a handful of shotgun pellets down the air intake. Guaranteed to work :laugh:

blind_elk Grand Master

blind_elk

Posted
Posted

I agree with the majority of opinion here - on cruise, the turbos are simply "spinning in the breeze" - you should find that the engine is still under vacuum.

If you disable the turbos, and you find yourself in a "sutuation" (eg misjudged how much time/distance you have to overtake a B-double), then you won't have the turbos to assist you in your time of need.

Just leave the damn things alone.

mad082 Grand Master

mad082

Posted
Posted

i would have to agree, on the simple fact that you are driving across a desert in a car that you aren't familiar with. you don't know if the thermostat or clutch fan is working properly. so you run the risk of cooking it on the way. at 100kmh there would be plenty of air going through the radiator, but it could still get rather hot. and if something breaks you could be stuck in the middle of nowhere.

supraaah Contributor

supraaah

Posted
  • Author
Posted

to those of u with helpfull and productive comments ...thanks, to the rest of u no one asked u to comment if u dont agree, notice i said "just an idea" i own a supra (hence my avatar) with different turbo setup and different gear/diff ratios, doing 160 even in sixed my turbo is spooling up quite abit, now as a newbie to the r34 i have never driven one, im buying it on my brothers behalf. Once again, thanks to those with productive comments :)

dont be so one sighted, there are different caars out there, if an r34 wont be spooling up at that speed, doesnt mean others wont...thats why i asked

paulr33 Grand Master

paulr33

Posted
Posted

no car would spool up at light cruise at 100km/h

even at 130kmh. the turbo has no relationship to road speed

it only cares about exhaust gas, which is derived from engine load

load the engine up, and it will wind up

the turbo will only spool if you open the throttle

engine load makes exhaust gas, exhaust gas makes the turbine spin

so once more

no car will make boost unless you pull the throttle cable enough

it wont under any circumstances staring winding in 12psi if you are just light crusing along the highway

Edge Proficient

Edge

Posted
Posted

supraaah - serious answer is that you will not be boosting at all infact you will have negative boost ie. vacuum. at cruise - which is most of the time so you will be just fine in the fuel economy department.

Also there is very little increase in fuel consumption and a lot more efficiency to be had from using the turbo when you are accelerating.

If you are wanting fuel economy what counts is how long you can maintain a cruising speed vs accelerating time. So if you drive in a way that you brake less and therefore don't have to accelerate back up to speed you will get more fuel economy. Accelerating hard onto the freeway will not see you use more fuel! What you will get is better power to weight ratio output from your lighter engine which has a turbo instead of a larger and heavier engine.

Once you drive it, check out the boost guage, this will show the boost negative or positive. Its definately extremely negative when you are cruising.

Do try to drive when accelerating with the rpm in the powerband where your engine is most efficient ie.over 2200rpm.

Don't forget the energy is used to get you up to speed and lost in braking. How hard you accelerate so long as you aren't going to brake for a while especially makes almost no difference to the fuel economy.

So feel free to use that boost to get you up to speed but try to maintain the speed without having to brake. If that means driving slower to make it through all the lights in the city without braking or coming up to a lower speed so when you do brake you don't lose as much energy from your last acceleration thats the way to go for fuel economy.

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