My PMO ITB Project

[village idiot]

That's a neat idea, cheap and simple

[MrPerkles]

Your making good progress Trog and ahead of me,I made a big mistake this week by not thinking where to put my CHT sensor and had to take the ITBs and engine shroud off last night,fortunately my loom is long enough as I have mounted everything under the drivers seat.
I still have to pull the loom back out this weekend to feed all my live wires through but im getting there and actually enjoying this project.

I look forward to your post of first start up of the engine ,should be exciting.

[CruiseControl]

Trog
Just a comment on your catch tank. I started off with a similar arangement using a 250mL plastic container, located at the right forward area of the engine bay. All was OK untill doing laps at the track. With the oil level half way between the low/high markings, I had about 30 to 60mL (1 to 2 oz) entering the catch tank per lap. Assume the oil was surging up the breather pipe under heavy breaking. The factory cone restrictor was installed in the breather hose at point of the hose connecting to the main oil tank.

Final solution was locating the catch tank at a level as high as possible (now mounted central to the air cleaners) and used a 8mm drain hose from the bottom of the catch tank into the left side of the engine breather plate. With the 3.2 there is (was) a temperature sensor for the engine compartment heater fan than can be removed (if no longer used) and utilise that point as the drain entry back to the engine.

The final aluminium, one liter catch tank does include baffelling up at the breather connection.

Don't under estimate the oil surge, or the air volume that passes the breather. Believe me it can make a messy engine bay, not to dismiss the traces of oil being left on the track.

Disregard all the above if you do not partake in spirited driving.

Paul

[Trog]

Originally Posted by MrPerkles

Your making good progress Trog and ahead of me,I made a big mistake this week by not thinking where to put my CHT sensor and had to take the ITBs and engine shroud off last night,fortunately my loom is long enough as I have mounted everything under the drivers seat.
I still have to pull the loom back out this weekend to feed all my live wires through but im getting there and actually enjoying this project.

I look forward to your post of first start up of the engine ,should be exciting.

Where did you finally mount the engine temp sensor? I understand that some have elected to mount the probe on the timing chain cover.

[Trog]

Originally Posted by CruiseControl

Trog

Don't under estimate the oil surge, or the air volume that passes the breather. Believe me it can make a messy engine bay, not to dismiss the traces of oil being left on the track.

Disregard all the above if you do not partake in spirited driving.

Paul

Duly noted.

[MrPerkles]

Originally Posted by Trog

Where did you finally mount the engine temp sensor? I understand that some have elected to mount the probe on the timing chain cover.

My ECU suppliers told me not to try and use an oil temp sensor and use the heads,I have machined an ally bracket and tapped into a fin on cylinder three then smeared some heat conductive putting around the joint.
I have my SSIS off now ready to weld in Lambda sensor bosses ,all good fun

[CruiseControl]

Trog:
With your wasted spark, what coil(s) are you using?
Paul

[Trog]

Originally Posted by CruiseControl

Trog:
With your wasted spark, what coil(s) are you using?
Paul

Paul:

Electromotive #33600

[luckydynes]

Hi there,

New to this forum but want to share a pic of my Ferrari setup. I used denso motorcycle coil on plugs and run it all with a Haltech ECU which I prefer to the Electromotive. I've got 350 hrs on this rebuild and EFI conversion so far and just busted my diff which brought me over here to play with you guys.

I have a '73 911s track car I go drive every time I start kidding myself the 308 is actually fast.

cheers all!

[luckydynes]

and the motorcycle throttle body conversion I'm working on.

[Trog]

I’ve taken advantage of the long week-end we’re enjoying here in Canada to make some good progress.

Firstly, I’ve finished the wiring. All signals are run and terminated. All that remains is a little tidying up, and zap-straps.

Some areas to take caution:

1- If you’re planning to install the TECgt under the drivers seat, the original harness may be in the way. I built a back-plane for the components and raised it about an inch above the floor. It was a simple matter to locate the old harness under the backplane well out of the way of the new wiring.

2- Protect the crank sensor wire. It’s not armoured and can get damaged fairly easily.

3- The fuel return line presents a challenge. I could have cut the factory line and installed a barbed fitting, but a more elegant solution was at hand. I removed the over-priced small line that connects to the fuel dampener and fastened it to the forward fastener that normally supports the cruise control motor. The factory fuel connector is a barb-fitting, which should work out very nicely.

4- The PMO ITB’s use the original barrel nuts that secured the original intake manifold. You’ll find that the barrel nuts wont fit on two runners on each side. A conventional nut will have to be used in those locations.

5- The Clewett cam-sensor requires a switched-12VDC supply. The TECgt cable that connect to the cam-sensor only has two-wires. Be sure to run a third wire in this bundle before you pull the signal cable. Don’t forget to install the 1k-Ohm pull-up resistor when you fabricate the harness.

6- I zap-strapped my oil-catch-tank into place, but I’m not happy with the installation. I plan to fabricate a new bracket and mount it properly

7- You need to decide where you plan to mount the MAP sensor and the vacuum manifold. It’s suggested that they be as close to each other as possible. I purchased the Clewett coil-pack mounting plate, which makes a great platform to locate the manifold and MAP sensor. I made a plate out of aluminium and sandwiched it between the DFU plate and the 4 - support legs. I also fabricated a bracket to support the pressure regulator and mounted it to this same location.

8- It’s a good idea put a barrier over the ITB’s. That last thing you want to do now is to drop a fastener down the intake.

Next week, I’ll fabricate the fuel lines, calibrate the throttle linkages, install the vacuum lines and test the sensors again. We’re getting closer to firing it up.

Stay tuned.


TECgt under the drivers seat:


Cam Sensor:



Crank Sensor:



Fuel return line:


DFU coil-pack and MAP / Vacuum manifold bracket:



ITB’s:

[MrPerkles]

Nice job Trog,ive struggled all night thinking of a way to wire my injectors in to look neat and have just spotted your 6 way connector.
Cheers thats what im now going to do this thread has been really usefull to me keep it up

[shbop]

Very nice Trog. Thankyou for the taking the time to relay this much info, along with the great photos. You seem to have a well organized approach. Can't wait to hear how it all comes together.

[Trog]

Originally Posted by MrPerkles

Nice job Trog,ive struggled all night thinking of a way to wire my injectors in to look neat and have just spotted your 6 way connector.
Cheers thats what I'm now going to do this thread has been really usefull to me keep it up

Actually, I'm not happy with the 6-way connector. It's hard to assemble, and I'm not confident that I have continuity on all 6-pins. I plan to replace this connector with a 4-way. The power is common anyway, so I don't really need 6-separate pins.

[MrPerkles]

I just finished my dummy test rig tonight and went to load the start up map only to find my laptop serial cable doesnt fit,talk about frustrating
I have never wired anything before in my life and at least the fuel pump whirred into life so that was a start
Where have you wired your tacho lead to ?

[Trog]

I don't think we have the same tach arrangement. Mine wires to the DME harness, where I tied it into pin #21.

Not sure how the '83 tach works.

Are those Marks & sparks socks?

T...

[MrPerkles]

Originally Posted by Trog

I don't think we have the same tach arrangement. Mine wires to the DME harness, where I tied it into pin #21.

Not sure how the '83 tach works.

Are those Marks & sparks socks?

T...

Playboy Bunny socks ,Christmas present off my mom I knew they would come in handy for something one day

[Trog]

That's hilarious. All I got was a lump of coal.

[stevemfr]

Originally Posted by luckydynes

and the motorcycle throttle body conversion I'm working on.

Looks very clean, luckydynes. How big are those ITB's and what are the off of?

One issue that has kept me from checking more into motorcycle ITB's is that they are (naturally) sold by application and not by size.


Clean install, Trog. I'm enjoying following your progress. Are you going to dyno the car for setup?

[hcoles]

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