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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E30 (1982 - 1993)

E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 05-01-2014, 01:24 AM
astroboy424 astroboy424 is offline
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Mein Auto: e30 325i
M20 eta stroker ideas!!

Finally decided to go the stroker route in my project.

Getting a short block from pick n pull shortly for $150 from an 325E. Yada yada. You know the story, clean it put it together.

My question is there better options?

Crankshaft.. I heard a m52 can fit.. is that the best and will it fit? What's the best without modding so much?

Pistons... Heard I's are the best for this if using m52 crank because compression will be 9:1. Anything better pair?

Intake manifold... are they all the same?

Throttle body... 325i is bigger than the E. But heard m50 can fit right one.

I'm also looking to turboing this as well, but in the future.

I just want the most bang for the buck. Anything will help thank you!

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  #2  
Old 05-02-2014, 05:30 AM
M-technik-3 M-technik-3 is offline
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Mein Auto: 88 M3x2 86 330i 4 e36's
If your going to go through that much work, purchase a nice M52 or S5X and install that. You will get far more hp and tq and not have to deal with a timing belt every 50K miles.

You will have to change the head on the 2.7L eta to see any gains in HP and TQ. I keep seeing people reference eta stroker. It was stroked by the factory so it has the longer throws, the crank doesn't need to be swapped with exception that it's cast vs forged. Guys were using m21 diesel cranks sometime ago. ETA engines respond well to adding a 731 head from a 323i E30 which was never sold here in NA officially. Plus adding the i intake and a better exhaust than the eta has.

You can purchase a good M52 and put new gaskets in it for under $1200, and enjoy the 190 hp and 210 TQ which is what a Alpina B3 made at a fraction of the cost.

I'm jaded, the lack of M20 speed parts are going away but there is plenty of M/S 5X parts out there. Had it been a m20b25 i would suggest a turbo system. Eta with a turbo nah the lack of cam journals limits the revs.
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  #3  
Old 05-02-2014, 12:27 PM
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Newman271 Newman271 is offline
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Location: Cincinnati, OH
 
Join Date: Apr 2012
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Mein Auto: 99' 540i M-Sport
M30B35 for half the cost and they respond to forced induction real well. M30B35 3428 cc 155 kW (207 hp) @ 5700 305 Nm (225 lbft) @ 4000 6200 9.0 1988

I paid 550 for the motor, trans, ecu, intake, wiring harness.. I did another 500 bucks in extras (port and polish, new mustang gt injectors, and new gaskets) and 300 for the mounts. It's a strong strong running car now. I don't know why BMW didn't put these in the cars to start lol.
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1985 335i
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  #4  
Old 05-02-2014, 02:11 PM
astroboy424 astroboy424 is offline
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Where can I find a m30? And is it easy to convert? I haven't done research on them but I will check it out now, isn't it for a e28? No clue about it. Lol
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  #5  
Old 05-03-2014, 11:40 PM
astroboy424 astroboy424 is offline
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Did more research and decided to go m30 route. Where did you buy the mounts? Anything cheaper?
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  #6  
Old 05-05-2014, 06:25 AM
M-technik-3 M-technik-3 is offline
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Mein Auto: 88 M3x2 86 330i 4 e36's
If you plan to do an M30 use a B35 engine from an E34 it was the most modern version of a M30.
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  #7  
Old 05-06-2014, 02:57 AM
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toybuilder toybuilder is offline
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Mein Auto: 89 325i 2dr&DucatiMonster
AB before you start doing engine swaps of any kind understand there is no cheap one they all will have problems and expenses you didn't count on and the more ambitious you are the more it will cost . HP = Dollars it's a pretty simple equation , I always tell customers who what to do swaps to tell me how much they think it will cost after they research what they want , then know that they will spend at least double what they think and sometimes triple before their happy.Yes you can swap in a different motor and trans and get it running cheap and spend the rest of you ownership driving a rolling project or spend big bucks and finish it all. A bit of advise though rolling projects NEVER get finished by you ,sometimes you can pass them on and a new person will finish them but never the guy who started them.
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  #8  
Old 05-06-2014, 06:09 AM
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Newman271 Newman271 is offline
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Location: Cincinnati, OH
 
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Mein Auto: 99' 540i M-Sport
Mine was a rolling project for a while... but it got done. Depending on the year of e30 you have depends on how hard the wiring conversion will be. Mine is a early model e30 so I had the Motronic 1.0 computer system in my car. I used a e34 engine so I had to do a bit of wiring to get everything to work. The worst part about the early motronic 1.0 is there not documented well on the wiring or atleast not accurately lol. So alot of what I did was trace wiring from the old harness to verify colors then do the same on the M30 engine harness then soldered and heat shrank the wires. The engine mounts can be bought from garagistic now, a sponsor of this forum, I think they sell for 300 bucks which is what I paid for a canadian to build be a set custom. The nice thing about my custom set is that I can slide the motor forward or backward about an inch. With the early model e30's there shifter assembly is set up on a plate that runs underneath the shifter. The newer stlye e30's use a shift rod. I had to drill and tap the plate on the e34 transmission. but I didnt have to modify the driveshaft.
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1999 540i M-Sport
Silver/Black
Still fresh and Minty

1985 335i
Black on Black coupe 5spd
R.I.P

1979 Trans Am 10th Anniversary
#16 of 5,683 made

KOI Import Parts-- 513-771-7777
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  #9  
Old 05-07-2014, 04:50 PM
astroboy424 astroboy424 is offline
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@toybuilder yeah I understand, what my plan is get a m50 or m30 ( still indecisive ) from pick n pull (300) and start from there. I'm leaning more on the m50, because there's a lot of parts out there still. I saw h beam rods forced pistons, maybe 500 ecu and wiring harness pick n pull, I'll just sneak it out. Lol ($0). I'm just going to clean it find valve springs that are not worned out and lost tension. New cams from dealer from an s50. $700 for both maybe? I understand it'll take me months and that's what I want. Machine shop. Maybe $600? I go to school and I get 1400 a semester for whatever I need so I'm going to be using that on this. For the wiring and all that. There's a btm racing shop near my house and I'll be asking them for a quote I remember last time they told me 300 cause its simple and just labor
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  #10  
Old 05-07-2014, 04:52 PM
astroboy424 astroboy424 is offline
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@newman271 sounds legit! I saw some m30 on YouTube with turbo. They look mean. They say it has more torque then the m50 but the m50 pulls out more hp. That's why I'm confused on with on to choose from
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  #11  
Old 05-08-2014, 05:49 AM
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Newman271 Newman271 is offline
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Location: Cincinnati, OH
 
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Mein Auto: 99' 540i M-Sport
Ha.. depends what your doing. Torque moves the car and horsepower sells cars lol. I think its more fun to hoon around town with all my torque at low rpm's than to have to rev out to 6500rpms to feel all the horsepower ha.
__________________
1999 540i M-Sport
Silver/Black
Still fresh and Minty

1985 335i
Black on Black coupe 5spd
R.I.P

1979 Trans Am 10th Anniversary
#16 of 5,683 made

KOI Import Parts-- 513-771-7777
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  #12  
Old 05-08-2014, 02:07 PM
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toybuilder toybuilder is offline
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I like Newman's car but I think if you want to do a budget swap an M50 might be a better fit since it's a little new motor and the parts new and used are a bit easier to come by. Plus to be honest it's been done more often so there's a lot more info out there on doing an M50 swap .Also a lot more shops would be willing to jump in and help fix say an electrical issue for an M50 or M52 as they're more likely to be familiar with working on them. It's getting tough to find a shop that does a lot of work on older BMW's .I still say HP= $ spent or the other way around.
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  #13  
Old 05-08-2014, 08:13 PM
astroboy424 astroboy424 is offline
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@newman your car sounds bad ass. And sounds dope. I'll keep my eyes open on that option it's though because everyone is treating those motors like garbage ): high torque.. YES lol but in the loooooooong run I guess an m50 is the route for now. Haha @toybuilder how hard is the wiring and what do you recommend doing?
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