DOHC B6 Information

[Dragonhealer]

Im sure i would seeing as mine has nooo power but its the mpg im after, i know somewhere i saw someone talk about a b6 that was carbed im old school thats probly the direction i would go seeing as mine is an 89 with an escort carb no ecm with a 4spd gettin 45 pretty regularly, does a b6 still get that good??

Uglyed and the Steve

No change in mileage after the swap, just WAY more power '92 with auto

[errjam]

capri harness vs festy harness I have a 93 festy with a 92 auto capri complete car.......

[william]

I average about 40 with my b6d it had low compression after the rebuild though.
And that's at 70 mph it's gotten better and can certainly get worse
That's with the factory 5 speed and 165/55/14's on light wheels.
Its also ran on capri electronics. Rather than the festiva stuff. At the time I did my swap I didn't know anyone who had done it besides shade tree he told me to use the capri harness because I had the whole car . Its easy to wire up and has been a great swap this engine should have been in the festiva from day 1.

[UglyEd]

Im sure i would seeing as mine has nooo power but its the mpg im after, i know somewhere i saw someone talk about a b6 that was carbed im old school thats probly the direction i would go seeing as mine is an 89 with an escort carb no ecm with a 4spd gettin 45 pretty regularly, does a b6 still get that good??

Uglyed and the Steve

[Dragonhealer]

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.

Yes, but;
We modified its shape with a heat gun, only to find it wouldn't clear the hood till we lowered the power plant 1/2 inch, which was only possible because the after market swaybar mounts were lower than factory ...

We kept all the B3 engine management, including injectors. The wiring wasn't too bad, but the hosing was inelegant to say the least...used Capri intake and exhaust manifolds, modified the rest to suite. By far the cheapest way to swap.

[Team Lightning]

Ed, mine has a B6D, you should love the extra power.

[UglyEd]

Love all this info on the b6 ive only had my "Steve" for a couple of years its my dd, never put much thought into a motor swap but after reading all this if my b3 ever goes south on me i do believe that a b6 would be a wise decision thanks again for all the info!

Uglyed and the "Steve"

[Advancedynamix]

William, great idea! I couldn't find a good capri rubber part either, but Russ at Roosport found me a new 323 one that did the job. It's nice having a new one because those things tear at the worst times when they are old and dry.

[Advancedynamix]

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.

Yes, a few people have used the entire B3 intake tube. I think it does touch the valve cover though.

[blake4591]

That's a good trick using the B3 rubber bit with the B6 plastic to get enough length. I'm hadn't thought of that but it's going to save some time for sure. I already have the battery mounted between the passenger headlight and engine mount on my car so I have alot of space for the VAM and filter on the driver side.

[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.

[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.

[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

[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.

[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.

Sent from my SM-G900V using Tapatalk

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.