That looks pretty sweet, and similar to the layout on my quad throttle body manifold. I like the look of your brackets for the fuel rail. Do you think you'll make up any more if other people are interested?

Here are some "renderings" of what I'm working on.

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  Mock-up Overview.jpg (180.58 KB)


  Fuel Rail Installed.jpg (126.87 KB)


  Injector Detail.jpg (170.13 KB)

time for direct injected A series! like Hyundai and Mazda aim for compression ignition to get rid of the spark plug and replace with injector :) if only it was that easy :)) warning might need pneumatic operated valves and an aftermarket ecu worth a mc claren

In all seriousness would it be worth leaving a little meat for porting out the oval port on the sides to have big round ports?

There's a trade off, yes you get better charge cooling having the injectors further out, but, the further the injectors are from the inlet valve the harder it is to tune for transient conditions as the lag time increases and the amount of acceleration compensation because the area of wetted wall/ size of the fuel pool gets bigger.

It all comes down to the fact that petrol/ gasoline is a mix of hydrocarbons and the heavier ones don't actually evaporate unless the manifold is heated (goodbye charge cooling). This doesn't matter for racing but is a pain for cruising around, it's almost impossible to get rid of all the flat spots. It also means you have to run richer mixes all the time to make it driveable. The other issue is it varies more with ambient conditions.

I say this from experience since my current setup has the injectors mounted ~500mm out from the cylinder head. I now appreciate how you end up with a better overall package if it's easier to tune.

The best place for the injector is in the cylinder, then you get the best of both worlds.

arent injectors these days located higher up than traditional efi setups
there are plenty of guys even TK using injectors higher up the inlets
and mimicking weber carbs to some cooled charge effect term used I forget

http://www.hotrod.com/how-to/engine/h ... p-fuel-injector-location/

Nice!

MMMMM - A series porn
Quote:

Render of what I have been working on for the A12 I have
(Sorry for the thread steal)

Quote:
A12: Round port or Large-oval port
A15: Round port, Oval port, or Small-oval port

Spacing is exactly the same, and they are symmetrical (left/right is same)

Two different bolt patterns (top row of bolts differs)
* Early: 1966-1980
* Late: 1973-2010

It's okay Dylan. Don't sweat it
I'm making me a set on my own. I have 2 design that I have been working on these last weeks since the recent post about manifold flange came up.
I am making a set that are of std. oval design, but my head is round so slight port work needs to be done to match port.
Other set I'm working on is a porting set, that have a D shaped intake, and enlarged exhaust. This one will have to be heavy portet, and have the water jacket above the intakes blocked or filled.