Rpeck

I just purchased an 88-anniversary edition. It has very low compression, so my intentions are to basically start from scratch. There is a place local to me that will rebuild the engine for me ($1750) I asked them about porting the motor: they told me they will port the motor, but I will not get the one year unlimited mileage warranty they offer with there rebuilds if I request it ported. That’s a bummer, how much performance do I stand to gain/loose based on that?

Also I read here about different intake manifolds, injectors, exhaust systems, etc. etc. This is not a California model car. I am bringing it in from out of state. But I need to keep it smog legal. If I port the motor will that affect smog? Can I get a performance injector kit, intake manifold, Those type of things and keep this car smog-able? What performance “mods” can I realistically add? I want to build, all legal “performance” engine parts into this car as I start from ground zero. Then I intend to get it smogged and put on a really nice Mod exhaust shortly after I smog it and be done. I can deal with changing the exhaust from stock to mod every 2 years to smog it, but I don’t want to get into changing any major components every 2 years. Also keep in mind I am limited to 91 octane max here.

Any suggestions on this would be great! I currently have a daily driver 87 N/A that is completely stock. My new 88 is the car I want to perform on weekends.

Thank you in advance. .

Rpeck

Also .. I keep reading about different styles & models of performance turbo's ... are any of these smog-able? or are they all race intented?

Icemark

If the motor is not in good tune it sometimes can very difficult to get a Rotary to pass smog without any modifications.

I don't know anyone that is getting passed smogs with a ported motor.

So what I did was port and polish the intake manifold, removed the pre-cats and replaced the main cat with a high flow. Depending on budget in the next couple of months a nice RB or HKS Cat back will replace the stock exhaust.

Being a Jspec now in my 'vert I didn't have the EGR as well.

I passed an informal smog (test only- no visual-no certficate) with reasonably margins, but suspect that if I don't have new/clean filters and plugs/plug wires/o2, that I might not pass.

However if the Smog test guy knew anything about rotaries and did a visual I would fail for sure.

Legally you can only change the intake- pre AFM and the exhaust- Post Cats. Anything else is illegal in CA and even some cheaper pre-AFM intake changes can be illegal if not certified by CARB (California Air Resources Board).

RexRyder

iTrader: (10)

I'm in the bay area, and been trying to find a place where to port my motor. where are you getting yours ported?

Rpeck

According to the guy that posted above this, I cant get it smogged if I port it. That and the fact they wont give me the warranty if I have them port it, Prolly not going to do it.

Can anyone tell me the performance Differance ported Vs. non ported?

Rpeck

Ahh where? I misread that. Mazda Auto Dismantling in Rancho Cordova CA, right near Sacramento.

NZConvertible

Porting just allows the engine to breath more efficiently. As long as the mixtures remain correct and everything is in good working order, porting shouldn't stop a car from passing a smog check.

RETed

About the only things you can do is...
High-flow main catalytic converter
Punch out the pre-cat, but leave the "case" intact
Cat-back exhaust
Intake

That's for basic.&nbsp You can run a boost controller to get the boost to go up to 14psi, but you'll need a supporting fuel pump upgrade for the increased performance.

Here's some interesting info...
http://fc3s-pro.com/TECH/FM2W/power.htm



-Ted

Icemark

With engine porting you are not increasing burn efficency, you are simply packing more combustible material into the engine to create a more powerful burn, therfore you are creating more Hydrocarbons both burnt and unburnt.

You can not increase the amount of unburnt intake without increasing the amount of the burnt and unburnt exhaust.

The smog restrictions in CA are based on PPM. So if you increased either burnt or unburnt HC and CO over a max line for the vehicle/engine you would fail.