Simple question, has turbo lag in the X been fixed or lessened?

I'm still trying to fully understand how a turbo charger works and why there even is turbo lag. Perhaps someone can sum it all up in noob terms.

 

http://auto.howstuffworks.com/turbo.htm

You should do some googling . I am not expert in this, but I don't think one can actually fix "turbo lag", but new cars with turbo chargers are getting less and less lag, kind of like how SST has shorten the gear changing time. You can't eliminate the time for the gearbox to change gears, but you can shorten it.

 

Cool, thanks. I also used wikipedia.

 

i think you can fix turbo lag... bmw did it by useing 2 small turbos one for low rpm and 1 for higher rpm or something like that... or u can use an anti lag system... i think its the same same thing as a misfire system...anyway you wont have anylag...but you will have to change tubos ALOT...

 

 

think of a turbo as a fan, you cant just flip a switch on and its instantly the speed you desire. instead of electricity turning this fan the exhaust air from your engine is turning it. the higher the rpm, the more air is comming out thus the fast the fan can spin until it reaches its maximum speed. the wastgate in a turbo system opens to leak out some of that exhaust air to control how fast the fan is spinning if it didnt the turbo would just keep going faster. now imagine a shaft connecting this fan to another both fans connected by the metal shaft in between them. so when the exhaust air spins one, the other is spun. the fans are shaped differently because fan 1 is using (exhaust)air to spin and the other (fan2)is pushing out air. from this point on lets call the fans wheels (since thats really what they should be referred to as. for fan two to be pushing air out it has to get that air from somewhere (keep in mind that the wheels are completely isolated from each other even though they are connected. that is what we reffer to as the hotside (exhaust housing) and coldside (compressor housing) and likewise the exhaust wheel and compressor wheel. the exhaust wheel is propelled by the used air from your motor and it goes out the other side into your O2 housing then through your downpipe and out your exhaust. the spinning of the exhaust wheel causes the compressor wheel to spin when it spins it takes air in through the cars intake and air filter, and pushes it out through the lower intercooler pipe. this air gets hot from moving fast and being close to exhaust components so it then makes it journey though the intercooler then the upper intercooler pipe. finally it enters the throttle body and gets burned into the engine starting the cycle again. any questions

 

NOPE! Thank you for your positive contribution!

 

pretty good summary

 

That would be a sequential turbo setup. That's not what the X35 BMW's use. They use two small turbos that spool quickly but, because they are small they run out of steam up top.

If you want good top end power you will most likely have to deal with a bit of lag.

 

you all act like turbo lag is bad. It really is not bad. If your racing your always gonna be on turbo, and for daily driving when your cruising theres no need for it. And lastly it makes for a nice kick in the *** feeling when you start to accelerate and you feel the boost kick in.

 

Umm, turbo lag is bad. It makes driving the car interesting but, that doesn't make it good.

 

there is ALWAYS a trade off in turbo systems, twin turbos do cover a far broader RPM range, but they are typically small turbos and way more complex. Unfortunately if you want big HP you have to sacrifice the fast spooling evo-turbo. considering the power that the evo is capable of maxed out on the stock turbo, it spools very fast, especially compared to turbos that would make equal power on other 4cylinder engines. the EVO is 2.0L less litres = less exhaust air coming out the engine head, this is one of the main reasons that it takes it soo long to spool a large turbo

 

you could invest in nos they sell kit I forget what they're called but they spray nos till the turbo spools then automatically shuts off they these kinds of system are used on bigger turbo sets that have more lagg, but doesn't mean there can't be some minior tweaks to be done to have it work on the stockies :P

 

mine improved slightly when i added the catback and changed the filter

 

Full bolt ons + E85 = no lag.