Will a Stroker Pass Smog?

[MonkeyMadness]

I have been tossing around the idea to build a stroker 2.8 maybe 3.0 motor, but i live in Nazi-Greenpease-I know better than you-California
and have to adhere to the "laws" on smog and look to keep this a daily driver.
I just finished my turbo build that I have perfected as a total 2hr swap!
So once ever 2yrs it takes me two hours to swap from turbo'd to bone stock smog legal E30, then 2 hours back to spooling swoosh! :pimp:

So my question is "if" I was to build this and drop it in my car will this motor run and pass smog if it's on all stock efi, injectors, maf, and 173 ecu.

This is my planed motor~
Crank: M52 (84mm Stroke)
Rods: ETA (130mm)
Bore: 84mm (Stock)
Pistons: Stock 325i pistons


I like this setup cause it's Square... :p

Or~
Crank: S52 (89.6mm Stroke)
Rods: S50 (135mm)
Bore: 84mm (Stock 325I)

Admin~ Please someone Edit my Title it should be Will a Stroker Pass Smog?

[MR 325]

I would say yes, should be fine. Assuming you have a nice cat on there, not some $40 garbage.

Assuming you are smogging with stock Motronic I'd use a stock B25 chip, should make it run lean and clean. :)

[MonkeyMadness]

I would say yes, should be fine. Assuming you have a nice cat on there, not some $40 garbage.

Assuming you are smogging with stock Motronic I'd use a stock B25 chip, should make it run lean and clean. :)

Ya that's what I was thinking. Using my stock 173 b25 ecu, and even running the stock 14.5# injectors.

And the I'll only be running it like this for the Smog test, nothing else...

[Myster-E]

I agree with Matt. It shouldn't be an issue. I love my 2.8, torque for days son! FYI stock injectors are 14.5ib, 17ib. are m50 injectors.

[MonkeyMadness]

I agree with Matt. It shouldn't be an issue. I love my 2.8, torque for days son! FYI stock injectors are 14.5ib, 17ib. are m50 injectors.

ya that's want I ment...

thanks...

[Jaxx_]

sounds like a bad plan to me. Even megasquirt plug and play would be better plan i think. Running lean doesn't mean it's going to pass smog. It's a sweet spot. Do they do rolling road tests as well? You're talking about running a map for a motor about 11% less volume.

[MonkeyMan]

I have a mild stroker (76.8mm crank from Euro 323i) with a cam from the same car -- it passed smog, but barely (the cam has more valve overlap than the stock 325i cam, so the HCs were a bit high on idle)...

Theres 2 types of smog tests in Cali: the drive test and the 2-speed test..
the drive test doesn't measure idle emissions, but instead while driving within a certain rpm range and speed..
the 2-speed test measures both idle and driving emissions..

From what I learned, depending on what city or town your car is registered in will determine what type of test you get... the more rural areas will get a 2-speed test whereas the city cars just get the drive test..

I got lucky - my car is registered in a city, so I got the drive test.. it would not have passed if idle emissions were measured.

So yea - the stroker itself shouldn't affect anything as long as its properly tuned; a cam will definitely influence the readings though..

[e30trooper]

i need to smog my car soon. not sure how its going todo. Still got the stock CAT , but i have a chipped 153 , runs a lil rich.. When i put in a 173 dme i get a CEL with code 1444. Not sure if i should "pass it" or see if it really does pass.

[MonkeyMadness]

i need to smog my car soon. not sure how its going todo. Still got the stock CAT , but i have a chipped 153 , runs a lil rich.. When i put in a 173 dme i get a CEL with code 1444. Not sure if i should "pass it" or see if it really does pass.

Are you running a 2.8?

[e30trooper]

Are you running a 2.8?

no just a rebuilt 2.5 with stock overbore. PO did some work tho. i know the AFm has been adjusted , DME wires tapped into , chipped DME , kill switch tapped in the DME...

[MonkeyMadness]

no just a rebuilt 2.5 with stock overbore. PO did some work tho. i know the AFm has been adjusted , DME wires tapped into , chipped DME , kill switch tapped in the DME...

wow sounds kinky..




---------------------------------------------------------------

I think half of you guy may not get what I'm looking for..
Sorry it my be my fault for not explaning it well..

If I was to take a bone stock m20b25 that smogs with flying colors
Then pull just the 2.5 crank and rods, and replace them a m52 crank and eta rods and shaved "stock 2.5" pistons and thrown on the smog machine
would it pass??

I'm not going to be driving it all over hell and back.. or making passes on it..
Just a idle and 25mph in 3gear smog test..

would it "in your opinion" pass??

thanks

[Jaxx_]

I think half of you guy may not get what I'm looking for..
Sorry it my be my fault for not explaning it well..

If I was to take a bone stock m20b25 that smogs with flying colors
Then pull just the 2.5 crank and rods, and replace them a m52 crank and eta rods and shaved "stock 2.5" pistons and thrown on the smog machine
would it pass??

I'm not going to be driving it all over hell and back.. or making passes on it..
Just a idle and 25mph in 3gear smog test..

would it "in your opinion" pass??

thanks

"in my opinion" you need to read more and understand that passing smog isn't always a correlation to how much money you've dumped into an engine. I think it will pass easily if you're not touching a cam.

[MonkeyMadness]

"in my opinion" you need to read more and understand that passing smog isn't always a correlation to how much money you've dumped into an engine.

Dude WTF are you talking about..?
Never mentioned dumping a ton of money into the motor or associating it with passing smog if I did so...

I think it will pass easily if you're not touching a cam.

Thank you!
This is all I was looking for.. now was that hard?:loco:

[Jaxx_]

[/B]

Dude WTF are you talking about..?
Never mentioned dumping a ton of money into the motor or associating it with passing smog if I did so...



Thank you!
This is all I was looking for.. now was that hard?:loco:

I don't think you actually read my previous post, or at least comprehended it. Why would it matter what you're putting into the motor? "Herp a derp I'm gonna list a bunch of parts that have nothing to do with what truely deals with emissions" the simple fact is it's tuning and that's all. If you can't get a car to pass emissions with a normal compression ratio and a mild cam, there's something wrong. This is why I was telling you to start reading. Smog comes down to tuning and nothing more. As long as you have a motor that isn't running a 360 degree cam and 25:1 compression ratio you shouldn't have much of an issue. As I mentioned, just running 17lb injectors doesn't mean you will pass smog because it's lean. Your concept of passing smog is on the completely wrong foundation.


http://www.megamanual.com/ms2/tune.htm#emissions read this and then you'll get a vague idea. You should probably read it twice or thrice, it is pretty dense material.

[Jaxx_]

btw, don't take my attitude personally. I'm just sick of so many r3vtards. :)