NOR-CAL General Chat.

[kronus]

good idea to not make it worse. less stuff to replace.

we probably have most of an m20 sitting around the shop if you need stuff.

[McGyver]

So I've been reading a bunch of m20 stroker threads, but haven't found solid comparison data. do we have a thread that summarizes builds and outcomes?

I'm looking for specific build info like, displacement, compression ratio, crank, connecting rod, piston, valve grind info, cam, any intake/exhaust port/polish, engine management. Then info on how that relates to dyno numbers for hp and tq. An added bonus would be fuel economy and how a chip tune on Motronic compared to standalone for the specific engine.

[kronus]

there are too many variables to draw consistent conclusions for any particular stroker build. kind of like, when you rebuild a motor you end up with error bars around whatever you'll end up with.

pick a build and go with it. this one is recent and fairly informative - https://adamsautosport.com/informati...ine-checklist/

[McGyver]

there are too many variables to draw consistent conclusions for any particular stroker build. kind of like, when you rebuild a motor you end up with error bars around whatever you'll end up with.

pick a build and go with it. this one is recent and fairly informative - https://adamsautosport.com/informati...ine-checklist/

Yeah, I get that there will be some variation based on literally everything when it's dyno'd. (ambient temp, elevation, humidity, engine temp, dyno machine, oil type, oil level, etc., etc., etc.)

I'd just like to see some number ranges. For example, BimmerHeads 2.9L vs 3.0L vs 3.1L engine with the recommended cam and a good tune vs IE's version vs MetricMechanic's version.

I guess I should just call Bimmer Heads...

[McGyver]

Shit, for the cost of building a proper 2.9L 10:1 compression m20 (~$6k), now I'm thinking about rebuilding my current m30b35 and just stuffing that into my daily. Maybe toss a slightly more aggressive cam, MAF, and chip at it while its apart and call it a day.

[wworm]

^would be cheaper, would also be sicker IMO cuz timing chain

but thats just the keyboard mechanic in me talking

[Bimmerman325i]

I'd vote a BAR'd 24v. More power, no emissions headaches since you won't be cheating, plentiful parts, similar cost.


Strokers are cool and all...but good luck with smog.

[betz]

I'd vote a BAR'd 24v. More power, no emissions headaches since you won't be cheating, plentiful parts, similar cost.


Strokers are cool and all...but good luck with smog.

Once I had my injectors/ tune sorted out, I did have good luck with smog :devil:

Final smog results

[Plantgame]

E30 Mechanic in Placerville

Does anybody know of a reliable e30 mechanic in placerville/sacramento

[McGyver]

Drove to new car to work today! I plan on taking it to smog after work. Gut feeling is that I fail, but we'll see!

[chriso]

Good luck!

[kronus]

it's ok i failed smog this weekend too

[McGyver]

it's ok i failed smog this weekend too

The touring? How's that project going? Legally registered yet?

[kronus]

The touring? How's that project going? Legally registered yet?

passed visual, failed the sniffer. running too cold.

[McGyver]

So it just needs a higher temp thermostat and more warm-up, or do you think it's a running-rich causing low combustion temps kind of cold.

Also, can anyone point me in the right direction for reading material about building a mild m30? I know this engine needs a rebuild before I use it, so while it's apart it would be a good time for a slightly more aggressive cam and/or chip.