Boost controller and wastegates on blower cars
06-24-2012, 01:01 PM
#63
9 Second Club
Ive decided to have a go at this myself after getting mine back up and running. Although not from the point of view of dumping boost at the higher rpm's, more dumping boost for low traction scenarios.
ie 1-3 gears on the street and possibly a little bit of 4th, as currently traction is non existent in the lower gears. A large power reduction should help ( ie run less boost in these gears, or up to say 120mph )
Ive only done some preliminary testing to see if it is feasible, and it seems it is. You do not need a wastegate.
Ive tested with my Mondo BOV and it works just fine. Just remove the two brass filters on the bottom ports so you can apply boost and this will allow you to vent pressure.
I tried using a regular 3 port solenoid to regulate pressure into this but it isnt suitable. Boost signal needs removed from the top port in order to vent enough air otherwise the valve just stays shut.
The OP in this thread is going about this in a slightly different way, same end result.
So here is what is needed. 4 port solenoid. Obviously some form of boost controller is still needed to control this. I'll just be using my ecu so will try to limit boost by gear
http://circuitse7en.net/fantcube/ind...d&productId=23
It will basically allow you to blow air into either top or bottom port as required, or any split in between.
So you can blow the valve open at one extreme, or blow it shut at the other.
green = unpowered
red = 12v applied.
ie 1-3 gears on the street and possibly a little bit of 4th, as currently traction is non existent in the lower gears. A large power reduction should help ( ie run less boost in these gears, or up to say 120mph )
Ive only done some preliminary testing to see if it is feasible, and it seems it is. You do not need a wastegate.
Ive tested with my Mondo BOV and it works just fine. Just remove the two brass filters on the bottom ports so you can apply boost and this will allow you to vent pressure.
I tried using a regular 3 port solenoid to regulate pressure into this but it isnt suitable. Boost signal needs removed from the top port in order to vent enough air otherwise the valve just stays shut.
The OP in this thread is going about this in a slightly different way, same end result.
So here is what is needed. 4 port solenoid. Obviously some form of boost controller is still needed to control this. I'll just be using my ecu so will try to limit boost by gear
http://circuitse7en.net/fantcube/ind...d&productId=23
It will basically allow you to blow air into either top or bottom port as required, or any split in between.
So you can blow the valve open at one extreme, or blow it shut at the other.
green = unpowered
red = 12v applied.
06-27-2012, 10:19 PM
#64
11 Second Club
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Ive decided to have a go at this myself after getting mine back up and running. Although not from the point of view of dumping boost at the higher rpm's, more dumping boost for low traction scenarios.
ie 1-3 gears on the street and possibly a little bit of 4th, as currently traction is non existent in the lower gears. A large power reduction should help ( ie run less boost in these gears, or up to say 120mph )
Ive only done some preliminary testing to see if it is feasible, and it seems it is. You do not need a wastegate.
Ive tested with my Mondo BOV and it works just fine. Just remove the two brass filters on the bottom ports so you can apply boost and this will allow you to vent pressure.
I tried using a regular 3 port solenoid to regulate pressure into this but it isnt suitable. Boost signal needs removed from the top port in order to vent enough air otherwise the valve just stays shut.
The OP in this thread is going about this in a slightly different way, same end result.
So here is what is needed. 4 port solenoid. Obviously some form of boost controller is still needed to control this. I'll just be using my ecu so will try to limit boost by gear
http://circuitse7en.net/fantcube/ind...d&productId=23
It will basically allow you to blow air into either top or bottom port as required, or any split in between.
So you can blow the valve open at one extreme, or blow it shut at the other.
green = unpowered
red = 12v applied.
ie 1-3 gears on the street and possibly a little bit of 4th, as currently traction is non existent in the lower gears. A large power reduction should help ( ie run less boost in these gears, or up to say 120mph )
Ive only done some preliminary testing to see if it is feasible, and it seems it is. You do not need a wastegate.
Ive tested with my Mondo BOV and it works just fine. Just remove the two brass filters on the bottom ports so you can apply boost and this will allow you to vent pressure.
I tried using a regular 3 port solenoid to regulate pressure into this but it isnt suitable. Boost signal needs removed from the top port in order to vent enough air otherwise the valve just stays shut.
The OP in this thread is going about this in a slightly different way, same end result.
So here is what is needed. 4 port solenoid. Obviously some form of boost controller is still needed to control this. I'll just be using my ecu so will try to limit boost by gear
http://circuitse7en.net/fantcube/ind...d&productId=23
It will basically allow you to blow air into either top or bottom port as required, or any split in between.
So you can blow the valve open at one extreme, or blow it shut at the other.
green = unpowered
red = 12v applied.
06-28-2012, 02:31 AM
#65
9 Second Club
That's an issue with using a wastegate. The diaphragm on top isn't large enough relative to the valve, so boost in the ic pipework is able to apply more force on the valve than the top can.
02-11-2016, 01:03 AM
#68
So many mixed reviews on this over the years. Does it work, yes. Should you do it..............well probably not.
When you free flow a blower into the atmosphere it apparently puts tremendous strain on it, often resulting in it premature failure.
My take on the whole deal...........When your not doing any serious racing, keep it pulleyed down or just simply keep your foot out of it. Then when its time to do something, put the kill pulleys on it and do your thing.
When you free flow a blower into the atmosphere it apparently puts tremendous strain on it, often resulting in it premature failure.
My take on the whole deal...........When your not doing any serious racing, keep it pulleyed down or just simply keep your foot out of it. Then when its time to do something, put the kill pulleys on it and do your thing.
02-11-2016, 03:12 PM
#69
9 Second Club
You can use any BOV that flows enough air for you, and that allows you access to above and below the diaphragm so you can either blow it closed, or open.
Then you need a 4 port solenoid to hook up to the BOV.
Basically 0% duty the valve will operate as normal, 100% duty would effectively see the ports reversed so boost pressure always tries to blow the valve open just like a wastegate.
02-12-2016, 01:20 AM
#70
Yes it does work, yes it is easy, and I dont believe for a second it will hurt the blower.
You can use any BOV that flows enough air for you, and that allows you access to above and below the diaphragm so you can either blow it closed, or open.
Then you need a 4 port solenoid to hook up to the BOV.
Basically 0% duty the valve will operate as normal, 100% duty would effectively see the ports reversed so boost pressure always tries to blow the valve open just like a wastegate.
You can use any BOV that flows enough air for you, and that allows you access to above and below the diaphragm so you can either blow it closed, or open.
Then you need a 4 port solenoid to hook up to the BOV.
Basically 0% duty the valve will operate as normal, 100% duty would effectively see the ports reversed so boost pressure always tries to blow the valve open just like a wastegate.
Do don't post as if it is okay only if you "think" it is okay.
02-12-2016, 03:35 AM
#71
9 Second Club
And look how many blowers fail on boost. We better stop running them like that too.
I ran mine for 2 years bleeding off, it works, it didn't explode my blower or even anything remotely like it.
I ran mine for 2 years bleeding off, it works, it didn't explode my blower or even anything remotely like it.
02-13-2016, 03:36 AM
#72
Never said your **** would blow up. Also, bleeding pressure is a little different than flat out free flowing it. Hence, why I said it "often results" and not "always results" in premature failure.
Running the blower into a restricted space (like the motor) is not nearly as hard on it. So the first two sentences in your last post make zero sense.
I'm just posting based on real world testing, where several of the different procharger head units where flowed (both restricted to certain boost levels, and open flowed) and the amount of power to drive the blower sky rockets when there is no restriction.
Go outside with your leave blower, hold that ****** wide open, now put you hand over the outlet and tell me what happens. I'll save you the trouble.........the motor/impeller speed up tremendously as all of the load is gone. This is an analogy, but obviously in the other direction.
Like I said.........it works, but not the smartest way to get to the desired end result.
Running the blower into a restricted space (like the motor) is not nearly as hard on it. So the first two sentences in your last post make zero sense.
I'm just posting based on real world testing, where several of the different procharger head units where flowed (both restricted to certain boost levels, and open flowed) and the amount of power to drive the blower sky rockets when there is no restriction.
Go outside with your leave blower, hold that ****** wide open, now put you hand over the outlet and tell me what happens. I'll save you the trouble.........the motor/impeller speed up tremendously as all of the load is gone. This is an analogy, but obviously in the other direction.
Like I said.........it works, but not the smartest way to get to the desired end result.
02-13-2016, 04:00 AM
#73
9 Second Club
How can it speed up when there is a solid mechanical drive with no slip possible ? Blower speed will always be relative to engine rpm. That cannot change.
And you dont know what the guy who is asking end result actually is. I thought he wanted a way of regulating boost with his blower, using his ecu and a BOV...which is what he asked.
Hence doing what I said will work, and work perfectly for what he wanted to do.
And even with a big red blowing it open as much as boost will allow, I couldnt achieve less than 8-9psi boost ( at the top end ) with my YSI vs 24psi or so with no leaks.
So to achieve a very low boost level it will take a lot more BOV or w/g than you think.
And you dont know what the guy who is asking end result actually is. I thought he wanted a way of regulating boost with his blower, using his ecu and a BOV...which is what he asked.
Hence doing what I said will work, and work perfectly for what he wanted to do.
And even with a big red blowing it open as much as boost will allow, I couldnt achieve less than 8-9psi boost ( at the top end ) with my YSI vs 24psi or so with no leaks.
So to achieve a very low boost level it will take a lot more BOV or w/g than you think.
02-14-2016, 01:53 AM
#74
How can it speed up when there is a solid mechanical drive with no slip possible ? Blower speed will always be relative to engine rpm. That cannot change.
And you dont know what the guy who is asking end result actually is. I thought he wanted a way of regulating boost with his blower, using his ecu and a BOV...which is what he asked.
Hence doing what I said will work, and work perfectly for what he wanted to do.
And even with a big red blowing it open as much as boost will allow, I couldnt achieve less than 8-9psi boost ( at the top end ) with my YSI vs 24psi or so with no leaks.
So to achieve a very low boost level it will take a lot more BOV or w/g than you think.
And you dont know what the guy who is asking end result actually is. I thought he wanted a way of regulating boost with his blower, using his ecu and a BOV...which is what he asked.
Hence doing what I said will work, and work perfectly for what he wanted to do.
And even with a big red blowing it open as much as boost will allow, I couldnt achieve less than 8-9psi boost ( at the top end ) with my YSI vs 24psi or so with no leaks.
So to achieve a very low boost level it will take a lot more BOV or w/g than you think.
