 » Site Navigation | | | | » Recent Threads | | | 1999 M3 Swap 09-07-2023 10:10 PM 05-02-2024 08:18 PM 6 Replies, 404,980 Views | |  |  |  | |  03-08-2006, 05:20 PM | #1 | | Member Join Date: Feb 2006 Location: Dublin Posts: 66 |  Turbo Injection?
What exactly does turbo injection mean? Are exhaust fumes being channelled back into the cylinders to improve performance? |  |  | | 03-08-2006, 08:17 PM | #2 | | aka Stabby Join Date: Nov 2004 Location: Mead, CO Posts: 5,336 |
where did you see "turbo injection"? not sure what you're referring to. __________________ 1996 318ti, California package, 267k miles
current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray
acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts
2002 X5 4.4 Sport Package, 53.5k miles
Current Mods: e46 m3 steering wheel | | | | | 03-08-2006, 08:27 PM | #3 | | Senior Member Join Date: Apr 2004 Location: Pennsylvania Posts: 218 |
A "turbo" uses a turbine that is powered by the exhaust to force more air (read oxygen) into the engine, But this is new air from outside, not the exhaust itself.
A supercharger is powered by the crankshaft (I believe).
Speaking of this, it seems that there is a lot of talk on these forums about DASC and other s/c's but not a lot with turbos... aren't turbos generally more efficient since they don't take energy from the crankshaft? I guess because s/c's don't suffer from lag the way turbo's do? | | | | | 03-09-2006, 01:18 AM | #4 | | Junior Member Join Date: Feb 2006 Location: Portland, OR Posts: 17 |
Quote: | Originally Posted by Etienne A "turbo" uses a turbine that is powered by the exhaust to force more air (read oxygen) into the engine, But this is new air from outside, not the exhaust itself.
A supercharger is powered by the crankshaft (I believe).
Speaking of this, it seems that there is a lot of talk on these forums about DASC and other s/c's but not a lot with turbos... aren't turbos generally more efficient since they don't take energy from the crankshaft? I guess because s/c's don't suffer from lag the way turbo's do? | I believe more people go with the S/C because of the engine configuration. With the current turbo kits out there the turbo goes under the car. The space is pretty tight as you work with the exhaust header and turbo. I have the turbo kit on my '95. | | | | | 03-09-2006, 01:55 AM | #5 | | aka Stabby Join Date: Nov 2004 Location: Mead, CO Posts: 5,336 |
i was thinking he thought "ti" meant turbo injection ... that's why i asked the question i did  __________________ 1996 318ti, California package, 267k miles
current mods: bilstein sports, bavauto springs, e30 m3 LCABs, solid metal ball joints, bavauto RSMs w/reinforcements, e30 3.73 LSD & halfshafts, supersprint cat-back exhaust, turner rear sway bar reinforcements, IE poly subframe & RTABs + camber/toe kits, powdercoated e36 32x front calipers, sport mirrors, H&R 28mmF/19mmR sway bars, x-brace, auto solutions SSK w/poly bushing upgrade, BMW CD43 head unit, DICE HD Radio w/iPod integration and "stealth" HD antenna, staggered style 68s, orange electronic TPMS, leather arm rest, JT Designs metal undertray
acquired and awaiting install: heated seat kit, cali top switch relo, lumbar support kit, park distance control kit, heated washer nozzle kit, m-coupe rear subframe, trailing arms, differential, and halfshafts, m-coupe front/rear brakes with master cylinder, under hood light kit, mud flaps, rear sun blind, auto-dimming rear view mirror, tilt steering wheel retrofit, apexcone 5000K HIDs with 55W ballasts
2002 X5 4.4 Sport Package, 53.5k miles
Current Mods: e46 m3 steering wheel | | | | | 03-09-2006, 09:44 AM | #6 | | Member Join Date: Feb 2006 Location: Dublin Posts: 66 |
So ti doesn't stand for turbo injection then? | | | | | 03-09-2006, 10:16 AM | #7 | | Senior Member Join Date: Feb 2006 Posts: 102 |
Hey Guys,
Yes turbos are more efficient than superchargers in a number of respects, like you mentioned they do not require power from the engine to run them they use the wasted gas off of the engine, also they are more volumetrically efficient than superchargers and if sized correctly lag can be reduced, but not eliminated (new technology dealing with variable vane geometry is coming about that reduces turbo lag so that its almost gone, but these cost a little too much for the aftermarket). But when it comes to smaller engines like the M44 and M42 a positive displacement supercharger like the Opcon Autorotor Twin Screw unit we are using or the Eaton Roots units the DASC and MASC systems use you get the ability to one eliminate lag and two to create more power at low rpms where these engines are really lacking this is due to the positive displacement of these types of superchargers. But these also have their own problems like you said, one being driven by the engine takes power with the roots drawing more due to its inefficient design (compared to the twin screw or the centrifugal type superchargers). Finally with a turbo system you usually have to do a lot of pipe routing to the air to air intercooler or to the intake manifold which on a car that didnt come with that space available in the first place things can get a little cramped and you can get into pressure losses where as with the supercharger you can literally replace the intake manifold and be done with it (over simplified). I can go on and on with both because they both have benefits and I love talking about this but I will finish with this turbos for racing and superchargers for everyday, you want to know my reasoning just ask, it will give me a reason to talk more haha. Look forward to your replies!
Greg Scrivner
SEAM
OEM & Performance BMW Parts | | | | | 03-09-2006, 01:15 PM | #8 | | Senior Member Join Date: Apr 2004 Location: Pennsylvania Posts: 218 |
If you write it I'll read it. Nothing like a free education  . I did a little perusing on wikipedia on turbos, and I can see what you mean about turbos requiring more "adaptation" to the car. They use engine oil too? Some really interesting science there though. We should have a thread on clever things that "ti" could stand for, or what people thought it stood for before they bought one. In Haiti ( where I grew up -- my parents did relief/missions work there) the local language is french-creole and "ti" means little ( a shortened version of the french "petit"). I knew that couldn't be what it meant, but it always seemed fitting to me. | | | | | 03-09-2006, 01:28 PM | #9 | | Senior Member Join Date: Dec 2005 Location: Asheville NC Posts: 669 |
Quote: | Originally Posted by Etienne We should have a thread on clever things that "ti" could stand for, or what people thought it stood for before they bought one. In Haiti ( where I grew up -- my parents did relief/missions work there) the local language is french-creole and "ti" means little ( a shortened version of the french "petit"). I knew that couldn't be what it meant, but it always seemed fitting to me. | I like Trunk Impared the best. That's what I tell my friends. | | | | | 03-09-2006, 01:49 PM | #10 | | Senior Member Join Date: Oct 2005 Location: Watford, herts, England Posts: 805 |
Ti = Touring International __________________ 
'96 318ti in Montreal Blue :m-tec sideskirts,m-bootspoiler,clear corners & repeaters .m-tech side mouldings, Magnex Exhaust System, leather armrest, F-15 gear Knob, 18" Evo 2's. Not Finished Yet......
http://www.myspace.com/davep_uk | | | | | 03-09-2006, 08:56 PM | #11 | | Senior Member Join Date: Jan 2006 Location: MN Posts: 155 |
Quote: | Originally Posted by SparksTi I have the turbo kit on my '95. | If you don't mind me asking, is that the mosselman or custom? __________________
live with boost | | | | | 03-10-2006, 02:00 AM | #12 | | Junior Member Join Date: Feb 2006 Location: Portland, OR Posts: 17 |
Quote: | Originally Posted by REDIS If you don't mind me asking, is that the mosselman or custom? | I have the mosselman turbo kit, installed it myself. | | | | | 03-10-2006, 02:42 AM | #13 | | Senior Member Join Date: Jan 2005 Location: boston Posts: 142 |
Quote: | Originally Posted by mss318ti , you want to know my reasoning just ask, it will give me a reason to talk more haha. Look forward to your replies!
Greg Scrivner
SEAM
OEM & Performance BMW Parts | Man i would love to hear it! I think of doing a major rebuild job on my ti..... __________________
HIOP TWINSCREW w/aftercooler water to air,
3.73 lsd,ported headdone,performence valve springs w/titanium retainersinstalled..nitrous kitinstalled fun fun
X brace installed5th injector w/ piggyback controler, high flow cat | | | | | 03-10-2006, 02:43 AM | #14 | | Senior Member Join Date: Jan 2005 Location: boston Posts: 142 |
oh yeah if a LS1 V8 can fit... anything can.. __________________
HIOP TWINSCREW w/aftercooler water to air,
3.73 lsd,ported headdone,performence valve springs w/titanium retainersinstalled..nitrous kitinstalled fun fun
X brace installed5th injector w/ piggyback controler, high flow cat | | | | | 03-16-2006, 04:02 AM | #15 | | Member Join Date: Sep 2005 Location: San Jose, CA Posts: 34 |
you put a Ls1 V8 on a ti ?? | | | | | |
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