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Bypassing a turbo. Can it be done?

General Tech Talk

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Posts: 375
Joined: Mon Mar 03, 2008 4:29 pm
Location: Camden NSW

Bypassing a turbo. Can it be done?

Post by Canyonero 4x4 »

Okay folks, here's the dilemma.

I have a half installed GTurbo on my 75. Bolted on, water and oil connected. I am now waiting on the intercooler to come from SA which is taking longer than expected and I won't see it before next week. Probably Tuesday at least. I'm going away next weekend and would like to drive it but I'm running out of time.
I still need to get the exhaust fitted, then tune it.

So...

Would it be possible to connect the intake manifold back up to the air box as standard and limp it to the exhaust shop (1km) and back? Letting the turbo just do it's thing but obviously not build up any pressure? Or is this a bad idea?

This would buy me some much needed time.

:popcorn:
Dave
Posts: 375
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Location: Camden NSW

Re: Bypassing a turbo. Can it be done?

Post by Canyonero 4x4 »

The only thing I can think of is unfiltered air being drawn in and out of the turbo. But as it's not going into the motor itself, it shouldn't matter I would think.
Dave
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Re: Bypassing a turbo. Can it be done?

Post by old lux »

the dirt and dust particals wont do the intake fins any good on the turbo. tilt tray it there and tilt tray it home? can you make hose to put between turbo and intake for the time being?
93 duel cab lux. 2.8 TD twin locked. Big tyres, little lift. Wide stance. Barwork and build up under way
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Re: Bypassing a turbo. Can it be done?

Post by rockcrawler31 »

Cheaper than a tow is to just put a super cheap pod filter on the turbo intake to stop pulling crap in. Make sure you boost control that gturbo down to 15 psi or less or you'll have 6 awesomely cracked pistons as paperweights!!! Ask me how I know!!
http://www.populationparty.org.au/
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Re: Bypassing a turbo. Can it be done?

Post by Lepa »

i suppose your waiting to get a cross country cooler??? i was told 4wks wait to start with, then 6wks, and now its been 8wks and i think they've only just started to my kit together. i feel your frustration, my only consulation is its for my car and not someone paying me to install one!!
'99 Gq ute - the "farm" truck now

'89 Gq Ute - Mudswap - Big, Bright Yellow and loves a bog hole

*newest edition to the stable* -- '92 gq efi wagon - rusty roof ready for the chop up!!!!!
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Re: Bypassing a turbo. Can it be done?

Post by Canyonero 4x4 »

Spot on Lepa. I held off ordering after I first emailed them as I wasn't ready. When I did order I was told 4-6 weeks worst case senario. We're now well into the 7th and it's not looking like it'll leave this week. Had I known it would be even a 3 week wait, I'd have ordered it when I first enquired.
They seem to have a pretty good reputation as far as the intercooler itself goes though so I'm hoping it's worth the wait.

Nice. So I have a few options now anyway.
Pod filter,
Connect the turbo to the intake pipe with some kind of hose,
Drag it (anyone know the legalities?)
Might even be able to get a flat tray.
Dave
Posts: 375
Joined: Mon Mar 03, 2008 4:29 pm
Location: Camden NSW

Re: Bypassing a turbo. Can it be done?

Post by Canyonero 4x4 »

But for $25, this is probably the go.
http://www.supercheapauto.com.au/online ... 5191#Cross
Dave
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Re: Bypassing a turbo. Can it be done?

Post by stool »

The problem I can see with doing this is over revving the Turbo with no restriction on the outlet .
GQ with big nuts
Posts: 375
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Location: Camden NSW

Re: Bypassing a turbo. Can it be done?

Post by Canyonero 4x4 »

Intersting. I'm keen to hear other people's thoughts on that as turbo's aren't something I've dabbled with before...
Would keeping revs as dead low as possible and a crawling pace help?
Dave
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Re: Bypassing a turbo. Can it be done?

Post by old lux »

stool wrote:The problem I can see with doing this is over revving the Turbo with no restriction on the outlet .
That's no real issue as the rpm is all controlled by the exhaust anyways. It's no different to blowing off a intercoolet pipe.
93 duel cab lux. 2.8 TD twin locked. Big tyres, little lift. Wide stance. Barwork and build up under way
Posts: 375
Joined: Mon Mar 03, 2008 4:29 pm
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Re: Bypassing a turbo. Can it be done?

Post by Canyonero 4x4 »

Well I did the pod filter thing and it seems to have worked. Didn't hit 2k RPM. Sounded bloody fantastic!

Turbo has been set at 14psi.
Intercooler should be here tomorrow, if not Wednesday.

Fuck yes! I am one happy man. :armsup:
Dave
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Re: Bypassing a turbo. Can it be done?

Post by crankycruiser »

I blew a turbo up once in the bush and destroyed it completly, so i disconnected the intake from the turbo and put a filter (off the quad) directly onto the crossover pipe and limped home 50k like that.

I had to keep a BIG eye on the egt's but it did get me home.
80 xtra cab
Supercharged LS1, Locked n shit

80 Wagon, TD Tourer, locked, Interco 35s, G turbo
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Re: Bypassing a turbo. Can it be done?

Post by MikeH »

Disconnect the actuator rod from the wastegate.
exhaust will push the wastegate open and it wont make boost. much.
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