DOHC B6 Information

[Advancedynamix]

any problem with a 91 automatic capri to my 93 manual festiva , can I use my ECU injectiors ect. its not the turbo
thanks for the info!

That's a great engine to use. The automatic capri was 9:1 compression and can easily be turbocharged down the road if you want more power.
You can use all your festiva engine management equipment, including injectors VAF meter. You will use the Festiva distributor, but you'll need to shave a little off the cam cap that secures the distributor. This is to clamp it tight since the clamp bolt holes won't lign up with the Festiva distributor. You'll run Escort GT plug wires.

[sc72]

What is the purpose of using the Escort GT wires instead of the capri wires.

[bhazard]

Look at an xr2 cap and a festy cap and you'll see why

[Advancedynamix]

Escort GT wires seem to be a lot easier to find.

[blake4591]

2. The throttle body from the Festiva should be used on the b6d manifold. They are the same size, but the b6d tps is different and they aren't easily swapped. The festy TB is a direct fit.

I'm not sure about this. The B6D auto throttle body I have is about 10mm bigger than the B3 manual throttle body. Externally they are the same except for a coolant line that goes to the idle air valve but the throttle blade size is different on the ones that I have. I also think that the B3 tps can be modified to work by using pieces of the b6d sensor but I haven't made one up yet.

3. The Festiva distributor must be used. It fits the 16v head, but the locking bolt holes don't line up. There are 2 remedies for this. You can shave a couple thousandths off the retaining cap and use it to lock the disty, or you can make a sheet metal adapter plate that bolts the head and the disty together.

I think a BP distributor would work, as in physically bolt up, but I haven't checked the signals that the distributor is sending out. There could be some internal parts swapping required to get everything working. I don't have a spare BP distributor but I'll keep my eye out for one to try some things with.

[shorestiva]

I'm not sure about this. The B6D auto throttle body I have is about 10mm bigger than the B3 manual throttle body. Externally they are the same except for a coolant line that goes to the idle air valve but the throttle blade size is different on the ones that I have. I also think that the B3 tps can be modified to work by using pieces of the b6d sensor but I haven't made one up yet.

Dig through my danger zone build thread. I'm running a 6d throttle body with a b3 tps. Just had to make little brackets to hold it in the correct position.

[bhearts]

Smaller throttle bodies would give you more desirable response on a turbo car. You don't want a 3 inch throttle body. 40 percent opening could feel the same as 70 percent opening.

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[Robalan]

What do b6ts come in, in australia


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[azgtx]

Bf 323 gtx and Kf tx3

[moz]

Bf 323 gtx and Kf tx3

Ke tx3 turbo (Kf is bpt)

BF 323

Ford Capri 1989-1994 only about half of them were turbo. In America it was Capri xr2 that had the b6t. However, in australia we got it randomly, there's xr2s here that are non turbo.

[Advancedynamix]

I'm not sure about this. The B6D auto throttle body I have is about 10mm bigger than the B3 manual throttle body. Externally they are the same except for a coolant line that goes to the idle air valve but the throttle blade size is different on the ones that I have. I also think that the B3 tps can be modified to work by using pieces of the b6d sensor but I haven't made one up yet.



I think a BP distributor would work, as in physically bolt up, but I haven't checked the signals that the distributor is sending out. There could be some internal parts swapping required to get everything working. I don't have a spare BP distributor but I'll keep my eye out for one to try some things with.

I suggest the b3 throttle valve for the b3 fuel injection because that's what the system is calibrated to and it's a bolt on part. The larger b6d body can be used as well, with an adapter like what Joe made.
Good tip on the bp distributor. Someone should check that. The b3 one works fine though and is already perfect for the b3 system. It's good to keep the system as stock as possible so that some new problem isn't thrown into the mix during a swap. After you know you've got a good running car then you can play with different parts.

Dig through my danger zone build thread. I'm running a 6d throttle body with a b3 tps. Just had to make little brackets to hold it in the correct position.

This^

Smaller throttle bodies would give you more desirable response on a turbo car. You don't want a 3 inch throttle body. 40 percent opening could feel the same as 70 percent opening.

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Often, this can be true. I wouldn't suggest running a b3 throttle valve on a b6t. Turbo lag is not a problem on these engines in a festiva. The b6t throttle valve is smaller than the miata b6 throttle valve. This is due to the b6t being tuned for a lower TQ curve than the B6-ze. The b6t plenum is too small to benefit from the larger throttle body. The miata has a larger plenum and wider runners.

[Advancedynamix]

I'm not sure about this. The B6D auto throttle body I have is about 10mm bigger than the B3 manual throttle body. Externally they are the same except for a coolant line that goes to the idle air valve but the throttle blade size is different on the ones that I have. I also think that the B3 tps can be modified to work by using pieces of the b6d sensor but I haven't made one up yet.



I think a BP distributor would work, as in physically bolt up, but I haven't checked the signals that the distributor is sending out. There could be some internal parts swapping required to get everything working. I don't have a spare BP distributor but I'll keep my eye out for one to try some things with.

Dig through my danger zone build thread. I'm running a 6d throttle body with a b3 tps. Just had to make little brackets to hold it in the correct position.

Ke tx3 turbo (Kf is bpt)

BF 323

Ford Capri 1989-1994 only about half of them were turbo. In America it was Capri xr2 that had the b6t. However, in australia we got it randomly, there's xr2s here that are non turbo.

Huh. That's good to know. Did you guys get the 323 16v like they got in Japan? It's NA and has VICS intake manifold, but it's a b6d.

[moz]

DOHC B6 Information

Huh. That's good to know. Did you guys get the 323 16v like they got in Japan? It's NA and has VICS intake manifold, but it's a b6d.

No we didn't.
I recently saw a Japanese bg with b6d from the factory. Probably the very first non turbo familia I've seen here.

Only aussie delivered/built engines were:

Laser kc-kh and mazda 323 BF-bg 85-94: b6, b6e, b6d, b6t, B8, bp, bpt.

There's also mx5, Capri, and later model lasers and 323 which have b6d, BP, and fs engines.

The dark horses are the 1995-2002 Kia's.
I've seen b6, b5d, BP, and some engines I wasn't even sure about.
I've read (but not yet confirmed) that some Suzuki balenos borrowed the BP for a year or so I'm the late 90s.

The last thing which is always the most exciting is that the import market here is huge! If it was built in Japan, then you can pretty much guarantee you can have it here. Older less popular cars are really cheap. Gary imported a festiva gtx (with that unicorn engine bj dohc) for around 7k including shipping, customs, taxes, etc. the car alone would've been like 2k only.

7k here is like usd$5k

[blake4591]

Has anyone used a B3 intake tube (Vam to throttle plastic part) with a B6D? I checked on my car and the B3 plastic tube will rub on the B6D valve cover. I was planning to run the capri style intake anyways but I don't think you could use the B3 intake even if you wanted to.

[william]

I didn't use the b3 plastic part but I did use the rubber part upside down.
The one from my swap car was shot so I used the festiva one.

I later put a motorcycle battry on the passenger side and made a bracket for the afm to set up higher.