I was wondering if anybody was interested ?

oh well here it is

You use a wire wheel to port your manifold and ports, I welded an extension shaft to mine, your ports should look something like this.



https://i231.photobucket.com/albums/...retporting.jpg

have a look at my web site too there are intake recordings at various timings.

my site



Beware there are pit really big falls with EFI systems.

1. WOT fuel delivery a 2000 cc engine needs 1000 cc/min with air cleaner removed.

2. Flap airflow meters would go off scale too.



Beware the timing needs to be tuned as carbon builds up.

I have a laptop interfaced to my second engine with my own program.

eg computer controls the engine timing and 2 stage rev limit.

The timing is linear with rpm as far as I can tell to 7200 rpm

eg plot a line 0 deg at 400 and 35 deg at 10000, 6000 is about 20 deg from memory.



If anybody has a flow bench handy you could bore out PVC pipe as a test, before cutting into any alloy head.

Things like feed rate in and out of the tube would have to be noted.



I had a primitive test setup that used 2 vacuum cleaners with a tee connected to a tube in a bucket of water, I found that the head of water did not go up very much when I was connected the tee to the inlet port with the manifold connected and I also found when I moved the tee about 10mm down from the port the reading when negative eg in free air I had about 110 mm of head then it went down to 50 mm, it was a 32 mm tee with a short piece of 25 mm pipe inside.



I have a 1986 Nissan Bluebird wagon 2000 cc (no EFI on this one)

I have tested fuel efficiency at idle and its in the range of 10 to 13 c.c./minute running a mixture of normal to slightly rich.

I have the test video's on Youtube you can go to my web site to see the 5 clips there,

Fuel Test

From what I have read a normal 2000 cc engine at idle consumes 24 to 26 cc of fuel per minute.



I have improve fuel efficiency under highway driving conditions, I have experienced as high as 60 mpg (4.71 L/100km) over a 220 km journey on a hot summer's day cruising around 80 km/h.



I have a stock carby and my vac sec are fully open at 2000 rpm

it used to be approx 4000 so I can only guess at the air flow and HP.