1.6l-1.8l

[TheChadVIII]

Startin the project car off with a bang!
Recently got my hands on a little NB engine, thing is I have an NA.

Anyone know a good shop around here to trust with a '91 1.6L to '00 1.8L conversion, or anyone here do this before?

Trust the Flyin' Miata conversion kit?

Hahah, I'm not gonna attempt this one, anything past a clutch and flywheel change and I'm lost.

[icepenguin66]

A few of us (i.e. me) have done the NA 1.8 swap. To put an NB engine in a NA will either require the complete ecu and harnesses or a rpm switch to control the VICS on the intake manifold.

[POS Racing]

Ataim is another one that did the 1.6 to 1.8 swap, but I'm pretty sure he used an NA 1.8 not an NB 1.8.

[TheChadVIII]

Awesome so other people have done it, now I just need to find a shop that can do it good.

And how different is the connection from the headers to the downpipe between a 1.6l and the NB engines? would it be possible to mod a 1.6l downpipe to fit a 1.8?

[POS Racing]

And how different is the connection from the headers to the downpipe between a 1.6l and the NB engines? would it be possible to mod a 1.6l downpipe to fit a 1.8?

Think the big issue is how to get NB engine to work in a early NA. Has anyone here tried that trick??

What side of town are you on ChadVIII doesn't seem to be on your profile.

[Miatamoto]

Good luck with the project. I can't wait to see how it turns out.

[TheChadVIII]

Richardson right near Richardson Square Mall, just updated profile haha. I should have the total ECU for it, I guess I'm in for some wiring. Gotta love EE degrees.

[POS Racing]

Richardson right near Richardson Square Mall, just updated profile haha. I should have the total ECU for it, I guess I'm in for some wiring. Gotta love EE degrees.

Now that will work!

Why don't you stick the engine in yourself? That would be the TCB (Team Cheap Bastard) method!

[Dave04]

Won't the real trick here be the emissions requirements of the '00 ECU (OBD-II) since he's going from an OBD-0 motor?

From the TxDOT:

http://www.txdps.state.tx.us/vi/Misc...ine.html#swaps

Therefore, the inspection requirements would be for the model year of the vehicle (same as the year of reconstruction) or the year model of the engine itself, whichever is the later model.

They may require you to meet the '00 emissions requirements.

[Sharpie]

Won't the real trick here be the emissions requirements of the '00 ECU (OBD-II) since he's going from an OBD-0 motor?

From the TxDOT:

http://www.txdps.state.tx.us/vi/Misc...ine.html#swaps



They may require you to meet the '00 emissions requirements.

Ding ding ding!!! This would be my major concern. I just dunno!

[TheChadVIII]

Well the engine met the inspection requirements from the NB it was pulled from, so sticking it in my car it should just give the same readings, I might just need to stick an NB cat on there.

[MadMerv]

..and why do you want to do this, anyway?????????

[Dave04]

Well the engine met the inspection requirements from the NB it was pulled from, so sticking it in my car it should just give the same readings, I might just need to stick an NB cat on there.

Sorry... there's a lot more to it than just the cat...

You'll have to install and wire all the sensors (evap stuff around the gas cap, extra O2 sensor 'cause ODB-II has two of them, etc, etc).

Also, just faking the ECU out to think it's meeting emissions is illegal and subject to a fine...

[Sharpie]

Well put Dave, I was thinking of that too. Not to mention the receiver that they plug the OBD2 cars into. 91' doesn't have that either.

[Sharpie]

Or would it just require the tailpipe sniffer, like a regular 91'. Dave's post got me curious, now I want to so some research. Learn something everyday!

[Titus]

Or would it just require the tailpipe sniffer, like a regular 91'. Dave's post got me curious, now I want to so some research. Learn something everyday!

I know that they can put an ODBII car on rollers if it can't make a connection to the ECU through the port.

[Dave04]

I know that they can put an ODBII car on rollers if it can't make a connection to the ECU through the port.

I have heard that too... but I can't seem to find it spelled out in the regs on the TxDOT web site. I can image there are at least some hurdles you have go through before they will let you do the dyno test.

The long and the short of it: I'm not trying to talk TheChadVIII out of doing it, but just recommending you do some research first and know what you are getting in for.

From my Honda Civic days, ODB0 to ODB-II was very messy.

[Treibenschnell]

..and why do you want to do this, anyway?????????

Good question...

[TheChadVIII]

I'm doing it because my 1.6l engine now has 130k miles and I'm not trusting pushing it very hard, much less putting a turbo on it, and I picked up an almost new NB engine for much much less than a rebuild. plus I'll get 30 horsies.

Plus about the whole emissions thing. Every shop I've ever been to for inspection has asked 0 questions, just scans the VIN number and do what the machine tells it to do, which it'd come back OBD 0 from my 91 VIN. Or if for some reason someone really knows miata at the inspection shop then I'll go find another inspection shop that isn't so astute. So I'm not too worried about emissions as long as it passes the tailpipe sniffer.

[icepenguin66]

As long as the conversion is done right and it runs properly, there shouldn't be a problem passing inspection. Hell, if I can take my 96 Z28 and rip off all the emissions equipment and rebuild the motor with the biggest cam possible without major mods and no cats and still pass inspection then I think a regular 1.8 swap would do okay!