New air intake plumbing for petrol GQ's

Engines and Engine Systems
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Peter Connan
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New air intake plumbing for petrol GQ's

Post by Peter Connan »

The petrol GQ's air intake sytem consists of an inlet box in the wheel-arch, a pre-filter in the left front corner of the engine bay and an air filter housing bolted to the top of the carb. Between the pre-filter and the filter are two sections of concertina-section plastic pipe, with a steel box between the sections. In colder climates, this steel box has a bypass valve and a second entrance, that draws hot air from above the exhaust manifold, but this feature is thankfully not fitted to our local cars.
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The issues with this system are that these plastic pipes become brittle with age, and are prone to damage. The filter element itself has also become pretty scarce, and the pre-filter is a huge airflow restriction. Because the shape of the ducting changes from round to square to oblong, it is quite difficult to replace the plastic bits without also doing the metalwork.

So between myself, Michael and Tinus, we hatched a plan:

Fit the stainless steel ZD30-replacement airbox where the pre-filter used to be. Then make up a new stainless steel carb cap, and a section of stainles pipe that bolts on where the old hot-air-mix box mounted.

The carb cap is designed to accomodate the vacuum hose for the altitude compensator, and also the little hot-idle valve from the old air cleaner and it's vacuum hose.

The components are connected with 76mm silicon hose.
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I have been using it for a few months now, including a trip to Aggeneys, Rosh Pinah and back. Fuel consumption is about the same, but it does seem as if the car has a bit more urge at the higher end of the rev range.

The system is available solely through Sojo Automotive.
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Rudolph
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Re: New air intake plumbing for petrol GQ's

Post by Rudolph »

Looks great! Well done.
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Re: New air intake plumbing for petrol GQ's

Post by SJC »

Are these “joints” not suppose to be sealed somehow?
Mine does not have any seals or rubber of any sort...
Is there really any purpose of having the pre cleaner filter installed?
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Peter Connan
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Re: New air intake plumbing for petrol GQ's

Post by Peter Connan »

They are supposed to be sealed, or nearly so. This is a big part of the reason I constructed the equipment pictured above.

Before that, I used duct tape.
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Re: New air intake plumbing for petrol GQ's

Post by Kagiso II »

eisjjjj - vir wat sukkel ik so met Moesse en heeltyd is daar 'n oplossing.. Daai konsertina pype is 'n pyn.
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Re: New air intake plumbing for petrol GQ's

Post by Peter Connan »

Die carb adapter wat ek gemaak het is nog hier as iemand hom soek.

Mens sal net 'n air box ook moet koop. Michael verkoop die mooi stainless een, of mens kan die plastic een uit 'n ZD30 ook gebruik. Daar moet mos baie van hulle rondle?
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Re: New air intake plumbing for petrol GQ's

Post by SJC »

Kan ek dit asb kry? :salute:
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Re: New air intake plumbing for petrol GQ's

Post by Peter Connan »

Hoe kry ons dit by jou?
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Re: New air intake plumbing for petrol GQ's

Post by offroadbiker »

Peter Connan wrote: 25 Jul 2021 16:26 Hoe kry ons dit by jou?
As jy by iemand kan kry wat rivier toe gaan kan hy dit daar kry.......
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Re: New air intake plumbing for petrol GQ's

Post by offroadbiker »

Peter Connan wrote: 19 Oct 2017 05:34 So between myself, Michael and Tinus, we hatched a plan:

Fit the stainless steel ZD30-replacement airbox where the pre-filter used to be. Then make up a new stainless steel carb cap, and a section of stainles pipe that bolts on where the old hot-air-mix box mounted.

The system is available solely through Sojo Automotive.
Michael hardloop weg as ek die gedoen wil he :pray: blykbaar sit ek met bietjie baeie pype wat geskuif moet word QQQ
Dirk
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