sequential twin turbo idea
On The Tree
Joined: Jun 2005
Posts: 111
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wouldnt you still have to wait for spool? the supras used a smaller and a bigger turbo.. your still throwing exhaust gas at a turbo thats sitting still...
cant tune the slow spool out? try raising egt's for quicker spool..
nitrous is a quick and easier fix..
cant tune the slow spool out? try raising egt's for quicker spool..
nitrous is a quick and easier fix..
Originally Posted by LS1_boostdscoob
wouldnt you still have to wait for spool? the supras used a smaller and a bigger turbo.. your still throwing exhaust gas at a turbo thats sitting still...
cant tune the slow spool out? try raising egt's for quicker spool..
nitrous is a quick and easier fix..
cant tune the slow spool out? try raising egt's for quicker spool..
nitrous is a quick and easier fix..
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TECH Addict
Joined: Aug 2004
Posts: 2,866
Likes: 4
veriable geomitry turbos will start to become more popular on production cars in the next very years! they havr deen used widley on deisels and are starrting to appear on high end pertol car (eg Porsche 911 turbo). the probelm is they are very complex to tune right! try aassking BTF (boldturbofreak) about his scooby with a VGT turbo on it and how long it took to get right! he is normaly nocking around onthe C4 section of corvettefourm.com
N2O is a great way to get the turbo up and running but it runs out. a supercharger would help loads, giving you boost all the time and spooling the turbo sooner but that is very complex and exspencive! bigger cc will help but again thats costly if you already have a forged motor. you could advance the itimg to the limits and map it as boost come on (like the rally guys do) but that takes a hell of a lot of dyno time and if you get it wrong it can be costly!
is anyone with turbos (esp big ones) running anti-lag???? i know it might sound stupid but this is a really effective way of killing lag! ok its not the best idea forthe turbo (quoted as being like trying to spin it using a huge hammer lol) but it does work!
therre are even more ways but i cant be bothered to type anymore. if you want to know some more the just ask! lol
thanks Chris.
PS. what i was trying to say is its always going to be complicated and there will allways be downsides to whichever route you take. itsjust which one (or more than one
) you think will work best for you! 
N2O is a great way to get the turbo up and running but it runs out. a supercharger would help loads, giving you boost all the time and spooling the turbo sooner but that is very complex and exspencive! bigger cc will help but again thats costly if you already have a forged motor. you could advance the itimg to the limits and map it as boost come on (like the rally guys do) but that takes a hell of a lot of dyno time and if you get it wrong it can be costly!
is anyone with turbos (esp big ones) running anti-lag???? i know it might sound stupid but this is a really effective way of killing lag! ok its not the best idea forthe turbo (quoted as being like trying to spin it using a huge hammer lol) but it does work!
therre are even more ways but i cant be bothered to type anymore. if you want to know some more the just ask! lol
thanks Chris.
PS. what i was trying to say is its always going to be complicated and there will allways be downsides to whichever route you take. itsjust which one (or more than one
) you think will work best for you! 
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Originally Posted by 1CAMWNDR
parish already has N2O on that truck.
ie, squirt 50-100bhp off boost, until a pre-determined boost pressure is reached, then shut it off, and let the turbo take over.
SSU'S Vice Mod
Joined: Jul 2004
Posts: 2,391
Likes: 0
From: Hazard Co. Maryland
Originally Posted by chuntington101
lulu that the 3.0ltr diesel used in the 535d right?? i have heard its AMAZING!!! and even better if you let some guys chip it for you! hehe i think they are making 450lbsft and will do well over 30 to the gallon even when giving it some! hehehe
anyway great find!
i think yu will see more VNT/VG turbos coming on the market for petrol engines! they are starting to come through now. the only problems with these butties is they requier complex electronics to control them! the sequential system above looks all manual!
Chris.
anyway great find!
i think yu will see more VNT/VG turbos coming on the market for petrol engines! they are starting to come through now. the only problems with these butties is they requier complex electronics to control them! the sequential system above looks all manual!
Chris.
Look at the way the turbos are set up on a Cummins twin turbo. Two chargers in series with a large wastegate between the head and first turbo that dumps the exhaust from the first turbo to the second at a certain intake pressure. A setup like this would be killer on a higher revving gas motor.
www.turbodieselregister.com - search here
www.turbodieselregister.com - search here
