I was talking to a mechanic friend last night, and we got onto the subject of turbos - he said that u can put a turbo onto any engine and as long as u follow a couple of rules, it
doesnt have any detrimental effect to the donk, and that datsun engines are good because thay are low compression...he said dont go over 8psi and keep the oil pressure up, with a dry
sump setup.
Damn it, now hes got me thinking!
Opinions please....

Linc.

I'm going to be turboing an A14 soon. I'm using the complete turbo setup from a Renault 5 GT-Turbo which uses a blow thru carb design. I have to fabricate an exhaust manifold and adapt
the A series intake to fit the Renault carb. This should be a relatively straight forward job because there is no complicated EFI to install and the Renault engine is also a pushrod
1400cc of very similar design so the fueling should be okay. The little renault engines can be pushed over 230hp but I'm not expecting that kind of output from an A14...I'd be happy
with 140-150hp @ the flywheel. The stock compression is 8.5:1 so I could theoretically leave it as is but I'd prefer to drop it a bit. Hopefully some combustion chamber work will
achieve this.
The great thing is that the Renault setup (also fitted to Renault 11's) is so cheap. I bought the whole car for

sound good, post pix when u can please - ta, Linc

Two excellent sources of turbo information are "Maximum Boost" by Corky Bell (Robert Bentley Automotive Press, publisher), and "Turbochargers" by Hugh MacInnes (HPBooks,
publisher). There are some points which the two authors disagree on but all in all they provide lots of useful information.

The statement that they have no detrimental effect is a little misleading. As long as you don't go overboard and maintain acceptable fueling (no pinging) then he is basically correct. The dry
sump issue has me a little confused as I have never heard of that before. I would think that standard oil pressure would be all that's needed eg the base motor must be in good nick. Have a
look at all the factory turbos many of which were based on non turbo motors originally. None of them have anything exotic as far as oil pressure and dry sumps are concerned. Eg - Nissan's
CA18, E15, FJ20 & SR20.
Toyota's supercharged 4AGE.
Even the 1275cc A series mini engine has a factory turbo with no changes to the oiling at all. Of course all these engines have stronger cranks, rods, pistons etc but that is in the interests
of reliability as remember Joe average that buys these cars is not always mechanically simpathetic like an enthusiast is.
8 - 10 psi should be fine in a healthy motor even a bit more as long as fueling is ok and there is no leaning out. If you are starting from scratch I would stay away from blow through set ups
unless you can get some factory stuff or a proven kit. MG Metro's in england (mini motor) run a factory blow through and the carb is set up specially. Draw through would be easier to set up.
Of course EFI would be the best bet. CAPA in South Aust have imported a cheap full EFI computer which they retail for $795 which I am looking into and it sounds great. I have access to a
factory EFI manifold and am going to set that up first then look at super/turbo charging later on.

Don't forget you should really use an ignition system that can boost retard the timing also. I would look at the set up on an E15T motor as that is the electronic distributor
(E15 non turbo)I am running in my 1200 at present. You would expect that Nissan would have a retard on this motor.

I disagree with you in regards to the blow through versus draw through. If you enclose the whole carburetor in a box, then all you need to worry about is raising the fuel pressure to
overcome the boost and provide a blowoff valve to prevent surge on shifting. Also with a blow through you can use an intercooler. If you try to use an intercooler with a draw through, the
fuel will drop out of the airstream in the core and you will have a pressurized bomb!

What u mean when u say u enclose the carby in a box? Is this so that when boost comes on for a blow thru setup, air wont leak? Theres gotta be a carby made for a blow thru turbo setup
somewhere. I think the whole idea of draw thru is a pressurized bomb! Somewhere along the line between the carb-pipe-turbo-pipe-manifold with an air fuel mixture somthings gotta blow at some
stage. But can understand the pooling of fuel in the intercooler as the air breaks up. Someone was saying on the OZDat list that they used a methenol/water injection as cooling on there
Falcon turbo suck thru setup. Obviosly better than a bomb straped to the front of your car! Also u wouldnt be able to use a BOV on a suck thru as u would be venting air/fuel under the hood.
Not a good idea. Someone said on OZDat u would have to recirculate it, im guessing just between the turbo and the carb?

Personally, if i was to Turbo an A15 i would go for a complete EFI quad throttle bodys. Would cost a fair bit more but in the end a better setup. My 2cents + gst...

Scott
Davo

save yourself the troubles and either fit efi or just put in a ca18, fj20 or sr20. By the time you stuff around with either draw thru or blow thru and get it running perfectly you
will wish you hadnt. Any three of these engines are relitively cheap, all make good power and are easy to fit. You will also end up with an economical little bullet with any of them
in a 1200.
See the light fellas and work smart not hard!

JOSH
datsr20t

I am still not a fan of home made blow through set ups. I would rather source a factory blow through carby that hhas been set up for the purpose. I agree with you on the draw through set up
and would only expect to see it used in a low power set up without intercooler. Mind you i have seen a draw through set up at a hill climb on an MGB running an intercooler. The guy reckons
it works well and the car certainly went ok. He jjust put a drain plug in the bottom tank of the intercooler and drains it after each run. I made a mental note never to accept a lift in
that car.
You could always use water injection to cool the draw through charge but that's getting a bit archaic these days. If you can afford it there is no excuse not to go with EFI, there are some
well priced computers coming onto the market now.