I've been thinking a while now about making up all sorts of manifolds and headers for the 1200. For starters, i am going to make up a stainless steel twin 45 weber manifold for my 1200. And
also some big extractors. The plenum chambers that you guys are talking about doesnt sound hard what so ever. I can get flanges inlet and exhaust for the A14/15. Then all i have to do is weld
in some injector nuts. The actual plenum i would use some 3" pipe reduced to whatever size the throttle body is. If any one else wants a weber manifold, just mail us. It will be fully
polished and looking real nice aswell. Im also making up extractors for Eddie's 1200 so anyone else want some mandrel bent stainless extractors?? Im allways up for a challenge and love
fabricating stuff so this is why im offering to anyone thats interested. I work for HiTech Mufflers so i have a ready supply of bends, pipe and welding equipment so its not going to be a
backyard job. Anyway, gotta go.

Scott
Davo

No don't. The more air volume in the plenum the better. Can't remember why but there is a certain Nissan turbo motor in Aus that is in our older Commodore and it is a common mod for high
power turbos to enlarge the plenum. Why don't you mount them from underneath firing just before the runner. Blowing the fuel around may not be a problem as that is how throttle body
injection works they don't fire directly at the port.
you could always put the throttle body in the middle of the plenum between 2 and 3 and facing over the rocker cover. That way you could have you inlet air duct coming from the opposite side
to the exhaust for cool air. There are plently of factory cars that have a slightly squashed pipe that does it that way. If course when I say that I can't remember if you were going to turbo
but if you have a front mount intercooler it will be good. You could feed into the intercooler on your drivers side then back out on the passenger side and over the rocker cover into the
plenum.
Don't worry about flow we have lots of custom Rotary's that have a similar plenum design so it must work.

I also think injection is the go b ut I was looking at supercharging to avoid the cost of reconditioning a turbo. I thought your exhaust idea was not so good but I mentioned it to my
cousin who is a mechanic and he said the Porsche turbo (924 I think) had the same set up so it must work. I thought it might hurt turbo response and lag but apparently not. If thats
the case my inward facing throttle body may not be too hard depending how you are running your intercooler. It can of course have inlet and outlet on same side.

Very ingenious. Love Ducati's so you did a good thing there. Might be a bit of a waste of some good webers these days with so may other options available. Have seen that done in English
car mags so it must be popular over there. Found another good use for SU's. Just read an article wher a guy modified one to use as a blow off value for his turbo. Didn't say how he did it
but its a cheap and cool idea.

Now you're a guy to get friendly with and I mean that in totally non biblical way. Anyone who loves working with stainless is a friend of mine. My idea for the inlet is the same but 3 or
4 inch pipe the bigger the better. I wouldn't reduce it down on the end though just use a flange with a bellmouth shaped curve on both sides to enhance flow and a square flange it would
have to be as that is the mounting shape of most throttle bodies.
Speaking of HiTech mufflers you can't get any cheap barrel mufflers by any chance. I want one for my MG Midget but can't quite afford it yet. (just kidding) But they look really cool are
they good enough as the only muffler, I could only fit one about 6 inches round and say 12 to 14 inches long with a 2 inch inlet 2.5 outlet.

Your concern over the plenum size is valid for a natural aspirated engine. I, however am going to turbocharge it. Visualize two plenums mounted to the Weber manifold. A horseshoe pipe
would connect the two on top between the ports with the throttle body in the center of that pipe. I think that with that placement of the inlets to the plenums there would be plenty of
airflow. As for the long pipe befor the turbine, the Subaru WRX has a deviously long run to the turbo as did most formuls one cars of the turbo era. Need I remind anyone of the 1300cc BMW
engine putting out over 1300 horsepower? I didn't think so. (Smug grin)

The farther your turbocharger is from your motor, the more turbo lag
you will have.

I would like to apologize to everyone. The formula that I posted for finding MPH by knowing the RPM is a bit wrong. I hope I haven't caused anyone any undue troubles with this. I will post
the formula again next week. This weekend, I plan to go to the Memphis International Raceway and check out the SCCA races. Peter Zekert, who I got the 72 1200 coupe from a couple of weeks
ago, will be running his tubed frame 1200. I have some good lenses and a couple of older F1 Canon cameras, I hope I can get a couple of shots to turn out well of his 1200 in action. I'll
fill ya'll in on Monday on how the Datsuns kick ass at the track.

I would like to say again that I am sorry to have posted the wrong RPM/MPH formula. Sometimes, I can be a very big dummy, just call me El Stupido Grande. In this club, everyone is into
mechanics, hot rodding, racing, re-engineering, innovation and sharing. I find myself almost unexcusable for the error. I do not want to tell anyone wrong.
It is amazing to me that my little blue Datsun that I got in 1972 because it was $300 cheaper than a Volkswagen Beelte, has been universally and independently become the hotrodders dream
car. When I go to a Ferrari car show, every car there is exactly alike, except color, and unaltered. Pantera shows are opposite, there are no two Panteras alike. Owners hot rod them. Most of
the Datsun 1200's that are left are not in their stock form either. Owners improve them with their own unique performance, safety and more modern modifications, such as larger radiators,
brakes, turbos, electronics, etc. This club has a great lifeline in that there are older eople that have been into the 1200's for 30 years now and the car has not lost its appeal. On the
other side, there are members that are very young that have found the 1200 and its appeal and they will always have a special feeling for their 1200. This club is the way for the newer
owners to amass the experiences of the older owners. I salute all in this club and again apologize for posting the bad formula.

hehe, damn right =)

I work on my datto everyday, even though there is nothing to do on it. I'm only a young fella, and i'm eager to starting putting performance parts and stuff on a car. But i aont gonna
touch the datto, coz i think it's the most stock datto in all of australia =)

I'm looking for some datsun shows that i can take it to, coz i think my datto is good enough to be in them, but i havent yet seen any form of datsun meetings or anything.

Anyway, back to the topic......
This club is a good chance for me to learn more and mre about datto's, and if it went to shit (like the chrysler forum i participate in), i would be at a loss. everyone here know way more
than me about datto's and are willing to help each other out when they're stuck with something.

This club rules! =)

byez

-Jesse (brakeless)