3.6 ITB Project

[Jim2]

Man of few words.... and dirty fingers.

I've been messing around for years building stuff, but I never really deviate from metal working. I'm envious of people with other skills like woodworking and fine carpentry, they can contribute to a household. It's pretty hard to impress the other half with a velocity stack.











Intake for some guys 8 cyl home built plane


Sled intake (Snowmobile 460hp)


Back on topic:

I ran the motor for while on Wednesday and started tuning but realized I have a loooong way to go before it's drivable. Very deceiving, it starts, idles, and revs beautifully, but then put in under load and the AFRs are all over the place. This is going to take a little while to refine as compared to the plenum style intakes I've dealt with in the past.

I've also had to spend a number of hours the last few days trying to find a better switched power source. The current power source I'm using is what I believe used to energize the DME relay in this car, but I discovered that once the alternator kicks in, the switched power source remains energized even with the key removed, effectively like it's being back fed by the alternator. Found another small blk/Red wire in the engine bay, it too is switched but also appears to get back-fed by the alternator. I don't have a schematic for the car so I'm trying my best to determine a suitable source from the key switch to energize my ECU relay. I posted another thread asking for some help from someone who might have a schematic (86 Carrera). I'm all ears if anyone can point me to a clean switched source on this car.

[al lkosmal]

Hey....I am very impressed. Mad skillz. Turned into a very clean machine. Look at that engine compartment. It is the business. (the UniFilter socks look great too!)

Congrats...now the fun begins.

regards,
Al

[Jim2]

Al, not sure if you recall but I asked you for a referral on the filter socks on one of your threads. The Uni filters were priced right at $17ea versus about $50ea for some others I was looking at. Thanks for the advice.

[al lkosmal]

Jim,
I do remember. The UNIs are priced right, look great on your intake set up and should work well.

A related follow up: One of my buddies has one of my EFI/ITB set ups on his engine and was asking my ideas regarding rain shields. We are located in the Pacific Northwest, so it's a reasonable and practical thought. Damn...i hate to be practical and I hate to mess up the clean, simple lines of the ITB filter set up, but I'm looking at making/sourcing some caps that will fit over the top of the UNI-Sox, to act as rain shields. Something discrete, that won't detract from the cool ITB set up.....and still allow plenty of air intake/filtered surface area. I've used the 906 rain shield repops and really like them, but this time I'm thinking more along the lines of a simple cap that covers the top and extends down the sides 1/2" or so...perhaps flared out a bit....to keep the majority of the rain out. What do you think of this idea?

Keep up the good work.

regards,
Al

[Tippy]

Jim2 - are you running the coils off the DME harness along with the ECM? If so, I had the same problem of the engine continuing to run after key was off.

The fix; hook the coils to the original power wire and all was well.

Yes, the idiot light keeps the system running after key off explained to me by "scarceller".

[Jim2]

Al, regarding rain shields can you tell me the outside diameter of your filter socks? (Somewhat accurate)

Tippy, I deleted the entire factory wire harness and relays pertaining to the motor and ignition, everything is now custom. My power supply for all aspects of the efi/ignition is taken direct from battery with relays switching each device. I just need to locate a clean switched circuit which is not back fed by the alt to activate my relays. Your note about the idiot light has been discussed and we feel it may be related to the back-feed issue. Anyhow, I did a search of Scarceller's posts and found your thread. It may well provide what I need as Scarceller says fuse 8 is switched and supplied the factory dme relay! I'll check it out tomorrow. - Thanks for the feedback, I feel like this may solve my problem. Sure sounds like you had a go round with your issue!

[Tippy]

Just to clarify, I hooked the Ford EDIS coils hot to the factory coil power wire and all was good.

I like the fixture you made to make the bell mouth of the trumpets - mental machining note.