Here, a little thread about the doings involved with converting a Nissan 1400 engine into a M3 eater, well ok maybe not the hole M3 that it's ankles :)

Starting off with the project in cyber-space, as usual. a couple of days in Auto-CAD and this is what I have....








pretty much almost exactly the same as what I'm running at the moment. The overhead exhaust manifold was kind of a stab in the dark, at the time. and with hindsight, It's the best way to do a U-flow head, in my opinion now. Some small changes here and there, things that I did not like from the first one, got fixed.
I'm using a one-piece exhaust flange, and the inlet manifold bolts on top of it.

now on to some of the fabrication.














Comment and suggestion are, as usual most welcome :)

are you going to put a flat side on the back of the plenium? like in the cad drawing?

looks good so far!

Might be a silly question, but I'v only ever had carb's.

But how do injector's fasten to bosses?

Oh and very nice looking job is the flat spot just for space?

I spose flow isent that important as its just a presurised tank realy?

my existing manifold....



the injectors are actually just sitting in the pods, the fuel-rail with the 4 upper pods, get bolted securely to the manifold, the spacing should be such that the injector has no movement up or down, but should not be clamped ether....

I actually don't need to, It fits in without any mods to the tube, though the flat sides does look a lot better. It is a lot of extra work though.

airflow is actually not a problem at all.... the idea here is to have the runner lengths tuned such that it will be in harmonic resonance at about 4500RPM's which is the middle of my boost band... 2500~6500(rev-limit). From there the 4 silicone tubes, such that I can actually play a bit with lengths.... If I where to want the tuned length for anything lower than 3000RPM, I will need the flat sides on the main tube.

Is that old/existing intake manifold for sale?

Not Yet :) still need the car in a drivable condition.... once it's all done And I'm running on this one, It probably will be.

As jy klaar is met die nuwe een, laat weet my, dan stel ek dalk belang in die intake. Ek sal graag die gedeelte wat teen die head kom ook wil h

interesting exhaust design! are you going to rap the intake tubes with cork?

also can you give me the diameter and length of your plenum?

I thought they were Cad drawings, spotted the UCS.

Nice setup.

What are the small bell-end pieces called?

Kalula, I'm actually going to be building these, on the sideline. This is why I'm building this one, to get all the jigging and tools sorted, also the sourcing of all that is needed, parts wise... what would you be interested in, just the clean manifold, complete with rubbers, clamps and stubs(part that goes onto head), but no T-body and no injectors, or you looking for the complete bolt-on less the ECU, but including the injectors, t-body, f-rail and FPR.

So far my pricing looks awesome, when you speak dollars.... but boy oh boy speak Rands and it makes me feel like I want to puke.... :(

The exhaust is weird yes, I admit ,but I have to also say, I would now, not consider doing it any other way, I have absolutely no heat issues with the setup in my car right now, and I'm not taking it mildly... 14psi frequently. No heat shielding, no ceramic coating, though I think that might be the in thing, looks so much nicer....



yes AutoCAD is what I use to do all my designs in.

my total length is 195mm with nominal diameter being 31mm(not including the port length). the diameter is not the important part, it's the length. I can, with the silicone mounting method, extend it to about 220mm. this gives me a tuned length scope of 4700RPM ~ 4300RPM. Remember that shorter is higher in the revs... these are from my ubber top secret ultra complicated formula I concocted while in school (25hears ago), trying to tune my 2stoke motorbike :) so the numbers might be off a tad... you know with inflation and taxes and all that... :)



Any one here with a nice planned view of a left-hand drive Ute\sedan\coupe engine bay, such that I can maybe get a better idea of what space there is with the master-cylinders and all that.... I just realized that I might very well need the flat sides on the tube, if it where to go into a lefty.... :)