Datsun Reviews

The 160Z was not a car we saw in Australia and, I believe, was more or less a South African-only model. Australia’s closest relative would have been the 120Y Coupe. As such, I’m not too sure about the way the fuel lines were routed from the fuel pump to the carburettors, but in the case of the larger 240Z Coupe which also used twin carbs, the fuel system in the engine bay consisted of a common fuel rail with rubber hoses leading to each carburettor.

So, for the pressure to be uneven in the two carburettors, you’d probably need to have a restriction or blockage in that rubber line or a problem with the needle and seat of the carburettor in question. The thing is, I’m not sure how you’d know you had a pressure differential unless you’d fitted an external pressure gauge to each carburettor’s supply line, as Datsun certainly didn’t provide such a gauge.

Perhaps you mean you have unequal vacuum at each carburettor and this is a much more common scenario. You can check for this with a vacuum gauge, noting whether one carb is `pulling’ more vacuum than the other with the engine running. From there, you can use the adjustment screws on the carburettor to match, or 'balance' the two carbs so they contribute the same effort in making the engine run.

This sounds simple, but it’s actually a job for a specialist who understands old carburettor designs and how to make them work properly. It’s a bit of a dark art, but rally workshops and mechanics that specialise in classic cars are a good place to start looking.

By the way, my information suggests that the carbs on your car are made by Hitachi and, therefore, are more likely to be a Japanese copy of the SU carburettor that has been turning motorists into mechanics for decades.

If you find a good Datsun 720 ute, then go for it. Like most vehicles from the late '70s and '80s, they rust away.

Is it better than the contemporary HiLux? Probably not, judging from what Wheels magazine had to say in its August 1981 4x2 single-cab diesel comparison by esteemed road tester, Brian Woodward, featuring the HiLux against the Datsun 720, Ford Courier and Holden Rodeo:

"Datsun has radial tyres as standard but they don't do handling much good; ride is choppiest of the four. Bench seat makes best use of space but cabin is claustrophobic. Engine gives most power but is truck-like with plenty of diesel clatter. Column shift works well. Load space and access is good."

Of the HiLux: "Toyota feels most car-like, is quietest of four and has most practical gear ratios. But it doesn't set standards for suspension control. Cabin is light and airy. Engine gives HiLux best performance and economy. Dash controls are easy to use. Deck is as for others."

"None of the four is a worthwhile alternative to a car or a serious rival for the good old Aussie ute, but the Toyota comes close. It is the one we would choose..."

Wheels then went on to compare the same new 1981 HiLux against the Holden WB Kingswood 3300 ute, with the following conclusion:

"The Toyota has plenty of ground clearance, useful low gearing and fine economy – a very different picture to that of the Holden and one which gives the Japanese a clear advantage as a practical workhorse. But utes are not only workhorses – they may have to carry pigs in the back on Friday but on Saturday they are expected to be able to take the missus to the shops (this was 1981, remember, Ed.). And it's here that the Toyota falls down. It's too commercial."

That all said, we'd buy on condition. If you find a HiLux that's in better shape than the 720, we'd go for that. But as you said, the Datsun is a rarer thing, and a delightfully period piece of engineering in its own right.

We hope this contemporary perspective of the Datsun 720 and Toyota HiLux helps.

THE best sources of parts for older vehicles such as yours, particularly those that were quite rare when new, are the car clubs. Look for a Nissan club in your area. Also scour the specialist parts magazines, because they sometimes have ads for collector car parts. Check the internet for suppliers of parts in other countries. You might find a source for parts in Japan or even the United States.