Z5+B6+turbo

[beetle_orange]

they sold 1.6 in the philippines, i am just not sure what they call it, if its a B6 or what.

just a thought, so if i go back to the philippines and the 1.6 that they have on their pro's are indeed B6 i can take the top end, intake manifold, exhaust manifold and i should be able to put that on top of the bottom end of the Z5 without having to worry about electrical and whatnot?

[strutman]

a lot of crx's have the b6, if it is a bolt on switch i will definitely do this, could you explain how you did this please?

[Gro Harlem]

he already explained how to do it....wtf

My only question is the wiring for the TPS and IAC...did it interchange?

I shoved one of these 1.6 dohc's into my old festiva this past september and the wiring was WAY different from the older 1st gen proteges, but yes..it was simialr to the 2nd gens. I haven't disected & looked at my 2nd gens wiring enough to figure out the diff's but the distributor & maf setups are identical between engines. I wouldnt' be surrpsied if you could use the Z5 harness w/the B6 ecu.

[midnightblue97]

a lot of crx's have the b6, if it is a bolt on switch i will definitely do this, could you explain how you did this please?

Dude, its a B6 not a B16. We're talking Mazda engines not Hondas.

[Shaun32390]

Does anyone know the actual code for the DOHC B6? My guess is B6-DE...? We should start using the proper code so someone doesn't go out and get a SOHC head!

The B6 is a carburated SOHC 1.6L in the BF 323s. The B6E is the fuel injected version in the BG 90-94 323s. As far as I know, the only car with the normaly aspirated DOHC 1.6L was the MX-3.

Gro, I think he said he swapped over the Z5 TPS. I just remembered also that we can swap the entire throttle body since one of our members (mig360m) was using the 1.6L tb on the Z5.

[Intruder]

Dude, its a B6 not a B16. We're talking Mazda engines not Hondas.

Show him where the door is. lol

beetle, you don't have to go all the way to the Phillippines to get a B6 head.

That B6 is found in some MX3's, and KIA's too. I saw one at the junkyard. It looks just like a BP at first, but look closer and you realize it's something else.

About a year ago someone came on this forum and asked for help with identifying his engine. Here's the thread: http://www.wihandyman.com/forum/showthread.php?t=12538 Check it out!

That's his Protege with a B6:


That's the B6 from a KIA:


And that's the same engine in a MX-3:

[midnightblue97]

I've got a Miata B6 that I might sell or part out if I feel like it at some point.

[Shaun32390]

TwinCam16, are you using the ECU from the Z5 also or the the 1.6L ECU?

The intake manifold you are using looks like the 1.6's. Is this correct?

Which exhaust manifold are you using? Does the 1.6L in Barbados have a precat?

Edit: Nevermind about the exhaust manifold...looks like a custom turbo manifold. Do you know if the Z5 exhaust manifold fits the 1.6L head?

[Project Protoge]

No the z5 manifold has round ports and the b6 has oval ports. Also the main advantage to swapping a b6 head would be to turbo it and their is no turbo manifold for the z5.

[Intruder]

Project Protoge beat me to it, but here's a graphical explanation of why the exhaust manifold won't work.

MX-3 models
92-93: SOHC and V6
94-96: DOHC and V6

Part numbers
Exhaust manifold gasket: B6S7-13-460
Ex. manifold: B6CK-13-451A
Pre-cat:
94,95 B6CK-20-500B
96 CALIF B6GD-20-500B (same as Z5 CALIF)
96 FED Z502-20-500 (same as Z5 FED)

[Intruder]

The intake manifolds are way different too. The B6 has a two-piece intake manifold, while the Z5 is a one-piece.

[Shaun32390]

Great info!

Intruder, are those diagrams from the FSM?

Do we know of any differences between the B6-ZE in the MX-3 and those in the BH Proteges?

So (assuming we keep the Z5 bottom end), I guess we would need the B6-ZE head complete with manifolds. And the stock precat would bolt up. We could swap the distributor and sensors (maybe the whole tb), and use our stock wiring.

I guess we would use the Z5 ECU since the engine would still be a 1.5 (because the extra displacement comes from the stroke; bottom end) and most of the Z5 sensors would be used.

This is extremely appealing! We would be getting a more confident valvetrain, the potential to use the B6T turbo components, and parts compatibility with any B6-ZE/B6-ZET aftermarket mods (cam gears, cams, etc)!

[Intruder]

Indeed, it is very appealing. The diagrams came from the parts catalog.

[Shaun32390]

the B5-ZE and B6-ZE on the BHA5P and BHA6P had VICS intake manifolds

Very nice.

... both the B5 and B6 engines have the same 78mm bore... 2.7mm larger than the Z5....

TheMAN, you said the bore is different between the Z5 block and B6-ZE head? I thought so..

That means we should actually swap the B6-ZE block also...or bore the Z5 block. However if it has to come out of the car, might as well chuck it and put the B6 block back in.

2.7mm = a 1.35mm edge all around the combustion chamber where the head meets the block. It must work ok if TwinCam16 has a turbo running on it that way.

[Project Protoge]

I was researching this a while ago and now I have no idea why I stopped. This looks like the best way to go. With just the head swap you don't have to worry about motor mounts or transmission splines and flywheels. You get more aftermarket and tons of potential. Well I was going to surprise some of you with this but it almost seems useless now.

I got a hold of jgs tools and they are willing to make turbo manifolds for us. If we got more than 10 ordered they would be $175 plus shipping.