Deep thought for tonight....

Thor06 · #1 07-27-2006, 12:59 AM

Ok, so heres my deep thought for tonight. So you know how on a turbo for every one revolution the exhaust turbine makes, the intake turbine makes one revolution? What if we could sorta "gear it" so that for every one revolution of the exhaust turbine the intake turbine would make say 1.5 revolutions? See what I am getting at? The intake side would be taking in more than the exhaust side is getting, and to me that would make the spool times drop durasticly and we would need a way more hardcore wastegate to keep up. Anyone follow my logic? Think it'll work anyone or am I just crazy?

I am going to school to be a mechanical engineer, if any of you fuckers take my idea, I'll eat your children

. I'm not joking.

Blackcrow64 · #2 07-27-2006, 01:11 AM

Umm... I could be wrong but I was pretty sure that they already did that with the wheels being different sizes. lol

david-b · #3 07-27-2006, 01:38 AM

crunchymilk55 · #4 07-27-2006, 01:44 AM

heheheheheh

Blackcrow64 · #5 07-27-2006, 02:02 AM

+1 for me! lol

Thor06 · #6 07-27-2006, 02:13 AM

I dont think we are on the same page. Correct me if I am wrong, but on a turbo, the exhaust turbine RPMs = the intake turbine RPMS, no matter what size the compressor wheel right? Now what I am saying is not running a connected shaft between compressor wheels and exhaust turbines and some how gearing them so that say for every one revolution of the exhaust turbine, the compressor wheel will make like 1.25 or 1.5 revolutions. Do you see what I mean?

I know bigger wheels will get more air in there, I am talking about bringing spool time down on those bigger wheels or making the bigger wheels make more power than they used to. Or for that matter, making a small wheel make more power. See what I am getting at?

crunchymilk55 · #7 07-27-2006, 02:29 AM

someone hasn't taken physics yet

take a paper plate, shove a pencil through it, put a bottle cap or something on the other end. Now rotate it through the pencil. Put a dot on the outer edge of each. See how at the same speed the paper plate dot travels a lot more? It has something to do with tangential acceleration and angular velocity, but I finished physics so I don't care to think about it

Blackcrow64 · #8 07-27-2006, 02:34 AM

Plus wouldn't using gears create too much friction and drag as opposed to the shaft we use now that pretty much rides on oil?

Thor06 · #9 07-27-2006, 07:42 AM

Quote:

Originally Posted by crunchymilk55

someone hasn't taken physics yet

take a paper plate, shove a pencil through it, put a bottle cap or something on the other end. Now rotate it through the pencil. Put a dot on the outer edge of each. See how at the same speed the paper plate dot travels a lot more? It has something to do with tangential acceleration and angular velocity, but I finished physics so I don't care to think about it

Yes crunchy I know. Now gear that so the paper plate makes an extra 1/4 turn or so than the bottle cap. It would be forcing more air into the engine at a given RPM since it is now spinning at a faster. See what I mean?

Blackcrow, never thought of that.

I guess I should just keep my "great" ideas to myself when I am that tired.

E-Klips · #10 07-28-2006, 12:18 AM

They just started making this type of thing in superchargers.

Its called Planetary gearing. Just like an automatic tranny, you can adjust the gearing so you can have 1:1, 1.5:1, 2:1, and so on. So say you have a 3:1 planetary geared supercharger. Every 3 turns of the compressor wheel equals 1 turn on the pully.

For turbochargers its a bit different. It basically goes by the size of the wheels. If you want the compressor wheel to spin faster than the turbine wheel then you need a turbine wheel that is larger than the compressor wheel. All that will do is get you a great airflow but your boost would suck, it would peak quick and drop off fast. Usually you want a little smaller turbine wheel to make the compressor wheel hold the boost and still flow good air. That is why companies make t3/t4 turbo's that spool crazy, also 16g's and bastard 20g's that use the 14b turbine wheel to help with fast spool.

It also depends on the turbine housing. Most mitsu housings create faster spool up time compaired to a T3 or T4 turbine housing. The smaller the A/R or the turbine housing, the faster the turbo spools.

BeZerK2112 · #11 07-28-2006, 12:31 AM

I can understand the concept working with a supercharger. With the belt driving the whole system you have power to push the gears. But with a turbo there would definently be too much friction to make it work. You would lose way too much energy to turning the gears and less to power would be left to produce the boost.

gthompson97 · #12 07-28-2006, 01:20 AM

I agree with everyone. It's a great idea Thor, and someday it will probably work, but it would create a good amount of more friction, probably equaling out everything anyways. The gearing idea would work if you could get like a "pre-turbo" turbo, like bolting a t-25 in front of a t66. The t25 would spool mad crazy, therefore sort of bridging the spool up time gap. I'm sure it would work if you found a small enough turbo, but that's wayy to much mathematical thinking for me to do, at least for tonight.

Another idea would be to somehow integrate a centrifugal clutch into the whole deal. Instead of running gears, if you used a centrifugal clutch with a small hotside blade to help spool faster, it would probably show some gains. Either way, any of these ideas would be a number of years before someone even though about trying something different.

I'm done being in my smart mood for tonight. I just painted a car and I think some of the fumes got to my head.

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