should my boost gauge drop to 0 when i shift?
07-01-2005, 05:03 PM
#11
1.0 BAR
Join Date: Oct 2004
Posts: 277
Re: should my boost gauge drop to 0 when i shift?
not trying to steal your post.... but
not to argue or anything but why would almost all oem turbo cars have a recurculated bov system if it didnt decrease lag? think about it, all that pressure lets say 10 psi goes out the bov as soon as the manifold hits vacume, its being waisted on an uncirculated bov system. the same principles that go into turbochargeing (not waisting vauable energy to increase effiecny) are applied to a bov system that recurculates in order for the positive air pressure to enter the turbine inlet allownig it to work less, because the energy that it needs to keep whatever psi your w/g is set at is less because the air is already pressurized, so your turbo would only have to push an extra say 4 psi after you hit the gas again. if you put 10 psi in from the turbo back into the turbo, its going to help keep the turbo spinning longer wich will reduce lag time. yeah it might not sound cool but whatever. yeah its true it may heat the air up more, because the ambiant inlet tempature is increased. but if you have a good i/c and your haulin *** down the freeway the chargepipe temps are going to be close to ambient, so if your bov was set after the i/c it wouldnt matter so much unless your no a dyno or somethin w/o any fans to keep it cool. anyways, im not trying to argue i just dont like seeing statements like that, when companys have spent trillions of dollars in research to make a turbochargeing system as efficient as possible and reduceing lag (while keeping it safe). i doubt many people w/o an engenerring degree can out do them. i say its best to look at thier work and build off of it.
Sean
not to argue or anything but why would almost all oem turbo cars have a recurculated bov system if it didnt decrease lag? think about it, all that pressure lets say 10 psi goes out the bov as soon as the manifold hits vacume, its being waisted on an uncirculated bov system. the same principles that go into turbochargeing (not waisting vauable energy to increase effiecny) are applied to a bov system that recurculates in order for the positive air pressure to enter the turbine inlet allownig it to work less, because the energy that it needs to keep whatever psi your w/g is set at is less because the air is already pressurized, so your turbo would only have to push an extra say 4 psi after you hit the gas again. if you put 10 psi in from the turbo back into the turbo, its going to help keep the turbo spinning longer wich will reduce lag time. yeah it might not sound cool but whatever. yeah its true it may heat the air up more, because the ambiant inlet tempature is increased. but if you have a good i/c and your haulin *** down the freeway the chargepipe temps are going to be close to ambient, so if your bov was set after the i/c it wouldnt matter so much unless your no a dyno or somethin w/o any fans to keep it cool. anyways, im not trying to argue i just dont like seeing statements like that, when companys have spent trillions of dollars in research to make a turbochargeing system as efficient as possible and reduceing lag (while keeping it safe). i doubt many people w/o an engenerring degree can out do them. i say its best to look at thier work and build off of it.
Sean
07-01-2005, 05:52 PM
#12
3.0 BAR
Join Date: Dec 2004
Posts: 2,133
Re: should my boost gauge drop to 0 when i shift?
Originally Posted by d0nfry
Originally Posted by B16CRXT
yes, teh lack of boost is normal when shifting. It goes right back up when you floor it again.
07-01-2005, 08:51 PM
#13
1.0 BAR
Join Date: May 2005
Posts: 378
Re: should my boost gauge drop to 0 when i shift?
Originally Posted by rexsk8er
not trying to steal your post.... but
not to argue or anything but why would almost all oem turbo cars have a recurculated bov system if it didnt decrease lag? think about it, all that pressure lets say 10 psi goes out the bov as soon as the manifold hits vacume, its being waisted on an uncirculated bov system. the same principles that go into turbochargeing (not waisting vauable energy to increase effiecny) are applied to a bov system that recurculates in order for the positive air pressure to enter the turbine inlet allownig it to work less, because the energy that it needs to keep whatever psi your w/g is set at is less because the air is already pressurized, so your turbo would only have to push an extra say 4 psi after you hit the gas again. if you put 10 psi in from the turbo back into the turbo, its going to help keep the turbo spinning longer wich will reduce lag time. yeah it might not sound cool but whatever. yeah its true it may heat the air up more, because the ambiant inlet tempature is increased. but if you have a good i/c and your haulin *** down the freeway the chargepipe temps are going to be close to ambient, so if your bov was set after the i/c it wouldnt matter so much unless your no a dyno or somethin w/o any fans to keep it cool. anyways, im not trying to argue i just dont like seeing statements like that, when companys have spent trillions of dollars in research to make a turbochargeing system as efficient as possible and reduceing lag (while keeping it safe). i doubt many people w/o an engenerring degree can out do them. i say its best to look at thier work and build off of it.
Sean
not to argue or anything but why would almost all oem turbo cars have a recurculated bov system if it didnt decrease lag? think about it, all that pressure lets say 10 psi goes out the bov as soon as the manifold hits vacume, its being waisted on an uncirculated bov system. the same principles that go into turbochargeing (not waisting vauable energy to increase effiecny) are applied to a bov system that recurculates in order for the positive air pressure to enter the turbine inlet allownig it to work less, because the energy that it needs to keep whatever psi your w/g is set at is less because the air is already pressurized, so your turbo would only have to push an extra say 4 psi after you hit the gas again. if you put 10 psi in from the turbo back into the turbo, its going to help keep the turbo spinning longer wich will reduce lag time. yeah it might not sound cool but whatever. yeah its true it may heat the air up more, because the ambiant inlet tempature is increased. but if you have a good i/c and your haulin *** down the freeway the chargepipe temps are going to be close to ambient, so if your bov was set after the i/c it wouldnt matter so much unless your no a dyno or somethin w/o any fans to keep it cool. anyways, im not trying to argue i just dont like seeing statements like that, when companys have spent trillions of dollars in research to make a turbochargeing system as efficient as possible and reduceing lag (while keeping it safe). i doubt many people w/o an engenerring degree can out do them. i say its best to look at thier work and build off of it.
Sean
07-02-2005, 12:25 AM
#14
3.0 BAR
Join Date: Mar 2004
Posts: 1,729
Re: should my boost gauge drop to 0 when i shift?
Originally Posted by sixsick6
Well said. Unfortunately, the ricers still don't seem to get it. The best system is a recirculating system, BUT, you have to pick your valve based on the system that you're running. A blow off valve does absolutely NOTHING performance wise, NOTHING.
Whether a BOV does anything "performance wise" depends entirely on your definition of performance. I'm guessing your statement concerns the people who upgrade the BOV on their car when the rest of it is totally stock, which is fair, I know a few of those. I grabbed a BOV and DSM sidemount off the same guy when he bought a new BOV and a new interf00ler, for his otherwise stock 2G DSM
Originally Posted by rexsk8er
im not trying to argue i just dont like seeing statements like that, when companys have spent trillions of dollars in research to make a turbochargeing system as efficient as possible and reduceing lag (while keeping it safe). i doubt many people w/o an engenerring degree can out do them. i say its best to look at thier work and build off of it.
Sean
Sean
Cheers,
Brett
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