Im just about to put a blow thru supercharger setup on my a12, and my mate has turboed a12. He has a 32/36 webber with upsized jets, he runs a low pressure electric carter pump as the problem we were having was the fuel bowl was emptying as the normal engine pump couldnt fill it fast enough!! He is running a fj20 turbo. At first we didnt have it intercooled and it ran at 7-8 pounds no worries. Next we put the intercooler on and run it at 10psi for about 2 months then he got bored so turned it up to 14psi and after a while did a ring land. The next motor we put in he thopught it would be fun to weld the wastegate shut and it ran on 20psi but lasted a night but all that happened was the rocker arms snapped mainly due to too much rpm. SO yeah they are pretty strong for their age!!!

as per comments...

I want to go blow through but unsure the weber sealing ability, plus i would have to get a high pressure fuel pump and reg to equal the boost.....so I've been told.

1. never heard of flame back so thanks for the info.

2. flat changes mostly..... but see what happens.

3.Where using a plumb back so it's all good.

Thanks bloke.

I am no expert in A-series turbocharging. However, looking at turbo kits for the Nissan L-series, I would say no more than 5psi for this motor, as it is "draw through" and not "blow through".

There are several problems with the draw through turbo systems, they include:

1. A situation called "flame back" where, under certain circumstances, the air/fuel mix in the turbo/induction system can ignite inside the them and literally shoot out of the front of the turbo. This can cause SERIOUS damage and toast the car. do not put the air filter too close to the turbo in this system; put it very far away.

2. During, particularly off-throttle moments, the air/fuel mix can settle out inside the turbo compressor housing.

3. No blow-off valve can be used in the draw-thru type since it would vent air and fuel into the atmosphere, VERY BAD! Since you would not have a blow-off valve, you would have a bad case of compressor surge during off throttle periods. This is bad for the turbo and its seals, etc.

4. No intercooler, very limited boost!

Just so you know!

G/day people, New members here. My house mate and I were given a '73 1200 coupe and where making it into a drag car. We got the motor to run and it has a average of 110psi to 130psi compression in the cylinders.

Now this has cost us only $60 bucks for the turbo and everything else was given to us, were doing it on a budget of as little as possible.

What we have also is a CT20 turbo of a diesel hilux (30'000klm old) and a 40mm side draught weber of a 2L escort and a 1200 manifold to suit the weber. Where having it as a draw through set up so no intercooler and I'm making the manifold for the turbo exhaust side etc.

The motor will be left stock except for a bigger radiator and a couple of other things.

What sort of boost level do you think would could go? We are not sure whether to run it on utilimate, avgas or meth.....

I've had 2 1200 utes and a 120y coupe, and my house mate had a 120y sedan all in n/a form and they all have done me well. I know that they can run in redline no worries at all but how they run under boost with a 9.0 to 1 compression ratio I don't.

Any thoughts... let us know....