PNW Chit Chat thread

[Matt-B]

Disagree.

Cooling issues: M30 has none, mine is turbo'ed and can run full 25min track sessions without a fan, only time it creeps is sitting at an idle after awhile. Then I flip a switch on my stock AC fan and it cools right off, even in 100 degree weather. I'm also not worried about my head warping or cracking when it does get a little hot.

Water pump isn't made out of plastic

Stock internals can handle tons of boost - see Good&Tight

Maintenance = regular oil changes, no brittle plastic to break such as intake manifold, oil filter cap, etc.

Big 6 ftw

Your comparing bone stock to bone stock? My intake isnt brittle, oil caps are same as m30s, I have the ease of a drop in filter, water pump is metal, I sit.in 100 degree weather running ac for 4-5 hours a day. No issues

[AbeSonic]

I have an M30 I'm planning on swapping onto my e30.

[delamaize]

I'm still on the fence about M30 Vs M5x. the 10mpg thing kinda spooks me though. I'm getting 25 out of my seta/eta/bastard now, and I'd like to stay in the 20's if possible, considering my other vehicle is a f150.....

[EN318isPDX]

Your comparing bone stock to bone stock? My intake isnt brittle, oil caps are same as m30s, I have the ease of a drop in filter, water pump is metal, I sit.in 100 degree weather running ac for 4-5 hours a day. No issues

Yup this S52 didn't come with a plastic thermostat housing/oil filter or a plastic waterpump. 24v wins for DD'ablility also performance parts are much more available for 24v motors, but M30 is still a badass budget swap out of the box.

MPG is the only downside IMO, According to several weight threads, the m30 engine isnt much heavier than anyone else, but weight is weight. and my next swap .. ya! ill wait till the payments is down to say. but the price and mileage was WAY to good to pass up.

M20 = 180.3 kg = 397.49 lbs

M20 + G260 transmission = 497lbs

M52B28 = 148.85 kg = 328.16 lbs


M30 + G260 transmission = 540lbs

So ~60-100lbs heavier? Not extremely huge but a bad place for an extra 100lbs.. Still a massive improvement over the M20

SOURCE

[Rennsport]

M30 is still an awesome motor but its not the best swap for an E30 IMHO ofc. Its heavy but sounds amazing.. If you want good power and torque on a tight budget M30 is the way to go.. But the MPG are gonna rape you

I was referring to late model oil filter cap, which is plastic with the dildo thing that can break which leads to oil pressure issues.

M30 gas mileage does not suck, I dd'ed my m30 swap (motor all stock) and did not have a considerable drop in fuel mileage, sure they use more when your romping on it (obviously, larger displacement.) Gearing can be changed also to minimize mpg loss, and it has plenty of torque to overcome low gear ratios.

Without AC components is not really all that much heaver and only noticeable on track/autox, which is able to be compromised with suspension tuning/corner balancing.

[e30austin]

I love my S50.

I liked it so well I bought another one to boost.

[Rennsport]

Just my family experience:

Mom's e36 (m52) - 2 engines in 2 years due to overheating and cracking the head, now onto the third engine and the car is up for sale.
Mom's e34 (m30) 4 years no issues
Sister's e28 (m30) 2 years no issues
Dad's e28 (m30) since new - no issues
My e28 (m30) 3 years no issues
My e30 (m30) 6 years no issues
My e36 (m44) 2 years, head gasket

These are only related to engine - plenty of other issues with the cars lol

[EN318isPDX]

Just my family experience:

Mom's e36 (m52) - 2 engines in 2 years due to overheating and cracking the head, now onto the third engine and the car is up for sale.
Mom's e34 (m30) 4 years no issues
Sister's e28 (m30) 2 years no issues
Dad's e28 (m30) since new - no issues
My e28 (m30) 3 years no issues
My e30 (m30) 6 years no issues
My e36 (m44) 2 years, head gasket

These are only related to engine - plenty of other issues with the cars lol

This makes you look pretty bias! LOL

[Rennsport]

I love my m30's

[EN318isPDX]

I love my m30's

I cannot blame you! What sorta MPG you get with the m106?

[Rennsport]

worse than terrible. Simply because I'm running 70lb injectors with a bosch 044 pump.

[Matt-B]

Just my family experience:

Mom's e36 (m52) - 2 engines in 2 years due to overheating and cracking the head, now onto the third engine and the car is up for sale.
Mom's e34 (m30) 4 years no issues
Sister's e28 (m30) 2 years no issues
Dad's e28 (m30) since new - no issues
My e28 (m30) 3 years no issues
My e30 (m30) 6 years no issues
My e36 (m44) 2 years, head gasket

These are only related to engine - plenty of other issues with the cars lol

This isnt really data you would logically go off of. Both of the dohc motors could of have pre existing issues. You can really only compare brand new vs brand new. Besides the motors being built differntly, they operate differently. Different designers, builders etc. Parts likes radiators differ etc.

[Matt-B]

Maybe im 24v biased, but ive only known people to blow m20s ( watson ) and m30s ( my friend alex, and tigran) since ive been into bmws. Never heard of someone grenading a 24v

[Wschnitz]

The s52 I sold ian should be a testament to the reliability of 24vs even when not taken care of.

[EN318isPDX]

The s52 I sold ian should be a testament to the reliability of 24vs even when not taken care of.

This is true. No idea how this motor was still functional