E30 Project Thread -- Job 4: Fix a bunch of little things.
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Marcus Brody
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Location: floating bumpercar

PostPosted: Tue Sep 28, 2010 1:54 pm    Post subject: E30 Project Thread -- Job 4: Fix a bunch of little things. Reply with quote

For those of you who haven't yet seen the new car, here's some semiartistic photos:






I'll try to maintain a decent explanation of anything technical for anyone who wants to follow along (who isn't John or Vince). If anyone at all wants anything elaborated upon, just let me know.

First job is to replace the blown 1.8l 4-cylinder engine with something bigger, more powerful, and...not blown. Several options are available for this. Here are the ones I'm considering, from least to most expensive:

1. M50 (189 hp at 5900rpm; 181 ft-lbs torque at 4700rpm)
This is BMW's engine out of the ~1991-1992 325i and 525i. It's a 2.5l straight 6. Costs about $400-600.

2. M50TU (189 hp at 5900rpm; 181 ft-lbs torque at 4200rpm)
This is the above engine with VANOS (variable Nockenwellensteuerung...see wikipedia) added. It's a variable valve timing system. Functionally, it fattens up torque curves a little bit. For reference, this is the engine out of John's 325i. Costs about $600-800.

3. M52 (193 hp at 5500rpm; 206 ft-lbs torque at 3500rpm)
This is the 2.8 liter successor of the M50 out of the 328i and 528i. A little more power, lots more torque. It can be converted back to an earlier emissions diagnostic standard (OBD1) for a little more power and torque. Costs about $800-1200.

4. S50 (240 hp at 6000rpm; 225 ft-lbs torque at 4250rpm)
This is the 3.0l engine out of the early E36 generation M3. It's still a straight 6, but the power and torque increases are pretty big. Costs about $2000-2600.

5. S52 (240 hp at 6000rpm; 236 ft-lbs torque at 3800rpm)
This is the later E36 M3 engine. It comes in a 3.2l configuration and gets a bit of a torque boost. Like the M52, you can covert it back to OBD1 for a little more power. Costs about $2400-3000.


The long-term plan is to go with the S50 or S52, but there's a pretty good chance I'll end up going with one of the M50s just to save cost in the short term.


Useful links:

Vorshlag $2010 GRM Challenge car - BMW E30 V8...or "How to build the perfect autox/track car for $2K"

OBD1 Conversion Links:

http://m3forum.net/m3forum/showthread.php?t=130494
http://homepage.mac.com/aceves/OBDI/OBD_ONE1.htm


Last edited by Marcus Brody on Sun Dec 09, 2012 3:09 pm; edited 6 times in total
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Viscount
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PostPosted: Wed Sep 29, 2010 9:03 am    Post subject: Reply with quote

will you be happy with the smaller engine in the long term though?
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Marcus Brody
The Dog


Joined: 09 Jan 2004
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Location: floating bumpercar

PostPosted: Wed Sep 29, 2010 1:45 pm    Post subject: Reply with quote

No, but if I've already swapped it once, doing it a second time should be relatively easy. Also, if I end up with the S52, I can use some of the M50 parts for the OBD1 conversion, which keeps the M50 from being a complete waste of money.

And in the meantime I can use the money I saved on the engine to build up the suspension and brakes so that the thing isn't a deathmachine when I put the M3 motor in it.
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Vin Sanity
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PostPosted: Wed Sep 29, 2010 9:51 pm    Post subject: Reply with quote

Jealous...


I would go with the M50TU or the M52 for now, depending on availability.. you could always go nuts and find a RB26DETT on eBay too, but that's if you want PCH (Project Car Hell, anyone ever read those posts on Jalopnik?)

But man, I often forget how pretty the e30 is, even though theyre kinda common down here...

EDIT: Or find a scrapped e90 or e85, and get a N52B30:
255 hp (190 kW) @ 6600 rpm and 220 ftlbf (300 Nm) @ 2750 rpm

It's a fairly nice lil engine, just sayin' Wink

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Marcus Brody
The Dog


Joined: 09 Jan 2004
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Location: floating bumpercar

PostPosted: Wed Sep 29, 2010 10:39 pm    Post subject: Reply with quote

Being my first engine swap, I'm sticking to something a little more tried-and-true. If I were going for a wildcat, I'd probably do the LS1 swap. There is, however, a definite romantic appeal in keeping the thing all-BMW.
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Raptor
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PostPosted: Sat Oct 02, 2010 9:45 pm    Post subject: Reply with quote

Here this build is worth reading:
http://forums.bimmerforums.com/forum/showthread.php?t=1343977

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Marcus Brody
The Dog


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PostPosted: Mon Oct 04, 2010 10:15 pm    Post subject: Reply with quote

So I just dumped a gallon of baking-soda-filled water into my battery tray and the underlying parts of the trunk (yeah, the battery is in the trunk). Let this be a lesson to everyone that you should always connect your battery overflow tube rather than being lazy about it like whoever put a battery in my car last.
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Marcus Brody
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PostPosted: Mon Oct 25, 2010 10:03 pm    Post subject: Reply with quote

Update:

I now have a complete S50 sitting in my garage, with matching ECU/harness, transmission, driveshaft, and rear differential. Not sure I'll need all of that, but it came as a package.

Other parts needed to complete swap:

E34 oil pan, pan gasket, oil sump, dipstick, and dipstick tube (have them)
Oil pan sump gasket, dipstick o-ring (still need them)
Engine mount arms (have one, other is en route)
Engine mounts (en route...went with AKG Motorsports polyurethane mounts made specifically for the swap)
Transmission mounts (en route...aluminum-reinforced E21 mounts, also from AKG)
Clutch kit (en route...F1 Stage 1 kit with organic clutch disc, pressure plate, lightweight flywheel, bearings, and alignment tool, from Gripforce)
Various replacement coolant hoses (still need them)
Various nuts and bolts (figure it out as I go)
Exhaust headers (still need them...never mind...just bought a set on ebay for $105 shipped...wooo cheapass parts!)
Replacement rear main seal (if I decide I have the balls to mess with it)
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Silverhand
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PostPosted: Tue Oct 26, 2010 8:01 am    Post subject: Reply with quote

Did you get a deal on the S50? You said earlier you were looking to save some dough now and perhaps throwing the big boys in later. Also what is the total investment to date? What did the car itself run you and such?
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Marcus Brody
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PostPosted: Tue Oct 26, 2010 9:54 am    Post subject: Reply with quote

The car itself was only $700 since the engine was blown, so that worked out perfectly. Everything after that has beat on my bank account pretty hard. I sort of used the philosophy of pulling off a band-aid by just getting the big spending out of the way all at once so I could rebuild my cash supply as I get the car ready for spring.

I just decided to go for the better engine first, since shipping ended up being about $270. It's a relatively small part of the bill at this point, but I'd still hate to pay that twice.
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Marcus Brody
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PostPosted: Wed Oct 27, 2010 12:00 am    Post subject: Reply with quote

Temp post for reference:

Need Dayco 71901 hose to use M42 radiator. Cut it in half and it works for top and bottom.


Last edited by Marcus Brody on Sun Oct 31, 2010 1:02 am; edited 1 time in total
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Viscount
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PostPosted: Wed Oct 27, 2010 2:03 pm    Post subject: Reply with quote

Marcus Brody wrote:
Temp post for reference:


Ahh, i thought that this was the starts of your christmas list

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Marcus Brody
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PostPosted: Tue Nov 16, 2010 9:53 pm    Post subject: Reply with quote

Started serious work on the car yesterday. Would have had the old engine pulled in one evening's work except for one tricky pin on the shifter linkage. Once that's dealt with, I just have to unbolt the mounts and lift the sucker out.

Compared to everything I've ever touched, this car is an absolute pleasure to work on. Very Happy
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Marcus Brody
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PostPosted: Fri Nov 19, 2010 8:48 pm    Post subject: Reply with quote

Old engine is out! Now I just need to:

-Clean the engine bay.
-Clean the new engine.
-Make a wiring harness adapter.
-Replace the rear main seal.
-Pull the old driveshaft.
-Move the brake booster over about 1/2".
-Weld/wire/locktite my oil pump nut, then swap the oil pan, pickup, and dipstick tube.

...all in no particular order.

And then a bunch of other stuff.
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Vin Sanity
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PostPosted: Sat Nov 20, 2010 12:28 am    Post subject: Reply with quote

Damn.. I'm jealous that you're having all the fun.. Of course I do have all my nautical nonsense going on down here, and the ongoing project that is keeping the S10 a viable mode of transportation.. I think I need to sort out getting money to bring the Tempest down here, possibly with the Audi 80 in tow, then strap in some Japanese encouragement into the engine bay of the Tempest, maybe that RB26DETT I love so much, or an HR37DETT (yeah, right)...

Anyhow, 'grats on the parts acquiring and the progress. Hopefully it continues going smoothly for you. You do need to post some before, and during/progress pics though..

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