E30 Stroker - The why.

[digger]

yeah budget stroker are cheap, expensive strokers are expensive

[Hooffenstein HD]

It can be pretty much as simple as a head gasket replacement, or a full race build. Depends on the size of your wallet and goals for the car.

[FunkySwerve]

generally there are no visible indicators on the outside of the engine to determine if the displacement has been increased. So, visually it should pass.
As long as the engine is running well with the proper air/fuel ratio then it should pass the tail pipe emission.

Excellent! I've read a lot of things need to be bought new and customized to some extent. I reckon it's quite expensive just on parts alone?

[wilholl]

Well that answers my street-able question. Will it past inspection? =0

generally there are no visible indicators on the outside of the engine to determine if the displacement has been increased. So, visually it should pass.
As long as the engine is running well with the proper air/fuel ratio then it should pass the tail pipe emission.

[FunkySwerve]

Well that answers my street-able question. Will it past inspection? =0

[digger]

Stroking an engine provides a means to increase mass flow of air through the engine

When you move more air through the engine and add a corresponding amount more fuel and it is burnt efficiently you get more power

the advantage of stroking the engine is that the mass flow has the potential to be increased at all rpm, though more typically the lower end and midrange torque and power show the biggest gains and the top end less gains but it depends.

[Hooffenstein HD]

Why? Increased displacement.

[FunkySwerve]

I've always been told that there's no replacement for displacement. Stroking = more displacement = more torque. People mainly do the 2.7i for the turbo application because it lowers the cr from 8.8 to 8.5:1. Not sure if that's what you're looking for, but hope it helps.

That does help, thank you! It makes a lot of sense given how light it is(and can be) and of course the rear wheel drive!

[biodose]

I've always been told that there's no replacement for displacement. Stroking = more displacement = more torque. People mainly do the 2.7i for the turbo application because it lowers the cr from 8.8 to 8.5:1. Not sure if that's what you're looking for, but hope it helps.

[FunkySwerve]

I've looked up many threads online about this very topic, perhaps I've missed a post in the many many pages of Stroker science and math...but there doesn't seem to be a short answer as to why you would stroke your engine in the first place.

So why stroke a m20B25 engine? Advantages? Disadvantages? I understand this may lean more towards subjectivity, but it'd be nice to know any and all reasons.

Also...because I live in CA, is it CA smog compliant and street-able?