Has anyone ever seen an article, or simply know someone who has dyno tested the four main types of induction systems for an A series Datsun engine from the 1200, B210, and 210's?




The three main systems I am referring to are:

1. Stock intake with a 32/36 Weber carb upgrade.

2. Single side draft setup

3. Dual side draft setup.

4. Datsun Twin Hitachi GX induction system

The engine combination I am thinking about would be basically like any mild performance street engine: .040" over, about 10 to 1, mild cam, and a header.

I'm prettysure the dual side drafts will make the most peak h.p. but what I'd like to know is how much less will the other three produce. How would the torque curves compare?

I would think you could go all out an get quad carbies an you would beat the lot. Is that a super charger pulley on the end of the crank?

Sorry i couldnt help you out i am sure someone will know something...

Hey, thats not a bad looking manifold. What brand is it and where did you get it ??

PS: Sorry to get off track!!

have you tried putting the carbys on cause i put mine on and it just fits and you got the master there keen to find out

Looks like a Redline
Also looks like no way the carbs will fit with the steering wheel on the wrong side of the car

And yes that is a suprcharger pulley on there.... well cam pulley
This is the 1608 Justy pistoned engine ?

I do not know if there has been a dyno test on all those options as a comprehensive one test for all at once , but I am sure there has been dyno tests separately on all those options through the years. That is some searching and investigation that calls for dilligency.

Talking about the carburetion variety listed , considering a mild bored engine with a pepped up ignition system ( Distributor work and coil / module upgrades ) my opinion would be that the DGAV 32/36 Weber would be a fine upgrade over the stock unit. With a cam and a pepped up ignition system the stock carburetion could not allow the potential this engine has to come out of the box.
The DGAS 38 Weber would be a next step , more power and torque than the 32/36 DGAV. I always thought about a dual DGAV 32/36 or even a dual 38DGAS set up, specially for those LHD cars with not so much space to accomodate dual DCOE's...even dual DCNF's ( used extensively with Ferraries)
Due to the position of the manifold facing directly over the head intake ports, the DCOE sidedraft Weber would be the optimum choice performancewise. Dual set up is the best because each port gets its own source. A single DCOE should be fine , but not the ultimate choice.

Perhaps the question would be how much better performance can a mild engine with a mild cam can be achieved with a set of twin DCOE's as opposed to a single DCOE.
The twin downdraft option is not available unless fabrication of manifolds is within your reach.
A single downdraft Weber will be outperformed by a sidedraft unit . I hope single and dual DCOE carbureted Datsun car owners can illustrate us on the difference in performance considering the engine degree of modification.

My apologies to all for not replying sooner. I keep forgetting that this sight does not send an email reminder when someone replies to your thread.

Quote:Yes, it is an E16 cam pulley that I may use with a blower some day, but not just yet. A timing belt will make a nice blower drive belt though.

Quote:
Quote:Yes it is a Redline. I ordered it from Australia. It was $170.00 US, and that included a dual side draft linkage kit, and shipping.
Quote:Yes

So let me understand. If you use the sidedraughts, then what we have is an American, fitting Italian carbs, that are made in Spain, to an Australian manifold, on a Japanese engine.

Now it that isn't the spirit of International co-operation, then I don't know what is.

Quote:The carbs definately don't clear the master cylinder and booster.





I am getting the B210 ready for a vintage car ice racing event and have just two weeks to finish preparing the car. I have to make a choice here real quick. I just bought a Canon single side draft intake manifold off of ebay last week. I could simply put it on and replace the brake system as standard and be ready to go. But the problem with that is that I really do not want to take off the twin Dellortos. I am quite certain I will lose a lot of top end power if I do. The Canon intake is very short and has some really sharp bends in it to clear the brake master. [That's why I'd really love to know how much power is lost with this intake over twins].

My other option is to do the unthinkable. I have a plan to mount the master cylinder ahead of the carbs and actuate it via a custom made 3/8" steel dowel pushrod. I would need to fabricate and weld reinforced mounting brackets to the left frame rail to mount the master. Yes, I have explored the options of aftermarket brake master systems, but none of them will fit under the dash of the car. The race cars that have them have the original dashboard removed. My car is a steet car and I will not butcher the dash or anything under it. I also searched these boards thoroughly and [correct me if I'm wrong] no one has ever run twin side drafts on a street driven LHD B210 with the stock dashboard before, so I can't copy what they did. If anyone has any ideas, I'd love to hear them.