M30b34 E30 twin-screw supercharged muscle car

[Ether-D]

OMgoodness. I think it may become a bit of a monster.

[Ether-D]

When you've got time instead of money…
I got the bends.

[Ether-D]

Yep, I don't actually have it in my hands yet. It should arrive late this week or next. I'll definitely dick around with it for many hours pre-install on the oil fittings and whatnot.

Zerk fittings would be neat.

[Shaffer325ix]

The supercharged Mazda Mellinias had something called a "Miller Cycle" I think. Look it up on the wikipedias. It's weird. It involves the actual engine and valves and such more than other types of supercharger setups.

But yes, twin screw is generally referred to as Lysholm as well.

Yes, yes.. I'm very familiar with that POS.. lol. The idea was great. Having 11 electric/vacuum solenoids and 38 feet of rubber vacuum line wasn't. One tiny little vac leak, the engine ran like poo and you possibly lost ABS and Traction control, engine would stall intermittently... When it ran good, The engine ran smooth and quiet at idle. Pretty flat torque 'curve'. However, the Lysholm (brand, not type) was fed oil from the engine. Unlike the M90 which had a bath (I believe), or at least its own source. Like the Lysholm, your SC has those little tubes to supply the oil to the bearings. You need to run synthetic or you can clog them up... Then the obvious happens. I know a few guys who tapped them for grease zerks without issues, but they also greased them frequently. You would probably be doing yourself a favor by making sure the tube were not obstructed at all.

[Ether-D]

A little exhaust work, all from recycled items except for the four 6" splices where I used new 2" pipe to overlap in both directions.

Downpipe section:


Splice to "H" or "X" pipe section:


Bend to dual in/out cat:


Complete unit:

[Ether-D]

This is the C101 pin out for 1987 325is. OMG such fear-smashing info in here. Yes. Very good.

[Ether-D]

The supercharged Mazda Mellinias had something called a "Miller Cycle" I think. Look it up on the wikipedias. It's weird. It involves the actual engine and valves and such more than other types of supercharger setups.

But yes, twin screw is generally referred to as Lysholm as well.

[Shaffer325ix]

twin screw is the ONLY way to go. I have a clutched twin screw off the c32 amg waiting to go on my fun car. Good choice in supercharger!

Is it a Lysholm?

I just junked my Mazda Millenia.. After seeing this thread I'm kicking myself for not pulling the Lysholm out of it.

..Subscribed

[Ether-D]

I haven't been doing a whole lot lately, but I did start to get the exhaust figured out. It'll go from the 1 7/8" stock down pipes, to stock "H" pipe then dual into the cat. It's some 2" dual inlet/outlet high flow somethingorother. Then I'm gonna have a couple 12" glass packs then some 2" pipe back to dual 24" glass packs at the ends of the tail pipe where the factory muffler was. I have no idea how it will sound. But it will have cost me about $80. $35 for 10' of the 2" pipe, and $45 for the 2 rear glass packs. Everything else so far was from the e30 parts hoard.

I think I'm spending all this time on exhaust because I don't wanna a do the motor wiring. I really don't wanna.

[DER E30]

I like this. I like this a lot.

[Ether-D]

Thanks Guise! So who has clever ideas about where I can tap some pressurized oil to feed it? It has an inlet and outlet on the intake side for rear bearing oiling. So I'm gonna need some erl from somewhere, and a drain also I reckon.

[chondamx]

I like this. I like this a lot.

[jeenyus]

Sick!

[dadsbmw]

twin screw is the ONLY way to go. I have a clutched twin screw off the c32 amg waiting to go on my fun car. Good choice in supercharger!

[Ether-D]

Ok, now I done bought this from The dark side of Will here on the forum. He's a super good dude, btdubz. This is a 1.5l Opcon Autorotor OA-3150 "twin screw" supercharger. It's basically the same size as the Eaton m90 from my m20 build, but about 25% more efficient. So it makes 3-4 more lbs of boost without raising the intake temps. I'm gonna shoot for about 10psi outta this little contraption. Scrumptious.