Turbo's with cut back blades ?????
25-07-2005, 01:46 PM
#1
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Turbo's with cut back blades ?????
Quick question.....
How do you identify if a turbo has cut back blades ?? and
what are there main purpose...
I should know this by now
Cheers
Al.........
How do you identify if a turbo has cut back blades ?? and
what are there main purpose...
I should know this by now
Cheers
Al.........
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25-07-2005, 02:04 PM
#12
Originally Posted by Turbosystems
cut back blades are to reduce turbine speed at high boost levels to prevent overspeed,the reduction in surface area of the exhaust blades actually increases lag
25-07-2005, 02:10 PM
#17
Originally Posted by AlexD
Whats the point then ???
Al..
Al..
bodge really IMHO
25-07-2005, 02:14 PM
#20
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Originally Posted by Mike Rainbird
Originally Posted by Tony Turbo
Main purpose is.....
?
25-07-2005, 02:19 PM
#22
Originally Posted by Mike Rainbird
The point is when pushing a turbo to it's absolute limit (as is regularly done within the Cossie tuning scene), it is designed to protect the turbo from over-speeding and destroying itself.
.
25-07-2005, 02:24 PM
#25
Chip what u on about ????? 
it is the exhaust wheel blades that have a reduction of surface area and it is for high boost applications only, to prevent turbine overspeed at these high boost levels. The higer the boost the higher the turbine speed.It is important that the turbine does not go beyond it's designed operating speeds.
If you look at the exhaust wheel you can see the blades have obviously been ground back commen cut back is 7 degrees.
it is the exhaust wheel blades that have a reduction of surface area and it is for high boost applications only, to prevent turbine overspeed at these high boost levels. The higer the boost the higher the turbine speed.It is important that the turbine does not go beyond it's designed operating speeds.
If you look at the exhaust wheel you can see the blades have obviously been ground back commen cut back is 7 degrees.
25-07-2005, 02:27 PM
#26
Originally Posted by Turbosystems
Chip what u on about ?????
it is the exhaust wheel blades that have a reduction of surface area and it is for high boost applications only, to prevent turbine overspeed at these high boost levels. The higer the boost the higher the turbine speed.It is important that the turbine does not go beyond it's designed operating speeds.
If you look at the exhaust wheel you can see the blades have obviously been ground back commen cut back is 7 degrees.
it is the exhaust wheel blades that have a reduction of surface area and it is for high boost applications only, to prevent turbine overspeed at these high boost levels. The higer the boost the higher the turbine speed.It is important that the turbine does not go beyond it's designed operating speeds.
If you look at the exhaust wheel you can see the blades have obviously been ground back commen cut back is 7 degrees.
The idea is to stop the turbo spinning too fast, an external gate can do the same thing by bleeding air off to prevent it going over the turbine, thats what i meant.
25-07-2005, 02:31 PM
#28
Originally Posted by chip-3door
Originally Posted by Turbosystems
Chip what u on about ?????
it is the exhaust wheel blades that have a reduction of surface area and it is for high boost applications only, to prevent turbine overspeed at these high boost levels. The higer the boost the higher the turbine speed.It is important that the turbine does not go beyond it's designed operating speeds.
If you look at the exhaust wheel you can see the blades have obviously been ground back commen cut back is 7 degrees.
it is the exhaust wheel blades that have a reduction of surface area and it is for high boost applications only, to prevent turbine overspeed at these high boost levels. The higer the boost the higher the turbine speed.It is important that the turbine does not go beyond it's designed operating speeds.
If you look at the exhaust wheel you can see the blades have obviously been ground back commen cut back is 7 degrees.
The idea is to stop the turbo spinning too fast, an external gate can do the same thing by bleeding air off to prevent it going over the turbine, thats what i meant.
. This is NOT what cutting back the blades is for, it is done JUST for the reason Tony stated...Opening the wastegate reduces the flow as you state, but this also has the effect of reducing the boost. Cutting back the blades achieves something similar witout reducing flow over that exhaust wheel. This retains the boost pressure, but reduces back pressure and stops the turbo from overspeeding.
25-07-2005, 02:32 PM
#29
Originally Posted by Turbosystems
doesn't read like that chip
and it's exhaust gas the air comes out the other end i believe
and it's exhaust gas the air comes out the other end i believe
I'll try and word things more carefully next time though if that was confusing, but yes i was talking about the hot side the whole time.
25-07-2005, 02:32 PM
#30
Originally Posted by chip-3door
Originally Posted by AlexD
Whats the point then ???
Al..
Al..
bodge really IMHO
25-07-2005, 02:33 PM
#31
Originally Posted by Mike Rainbird
So can an integral wastegate
. This is NOT what cutting back the blades is for, it is done JUST for the reason Tony stated...
25-07-2005, 02:37 PM
#33
Originally Posted by Turbosystems
Originally Posted by chip-3door
Originally Posted by AlexD
Whats the point then ???
Al..
Al..
bodge really IMHO
25-07-2005, 02:39 PM
#34
Originally Posted by Turbosystems
they aren't small on the turbo's that this topic relates if anything the wastegate penny is to big.The integral wastegate was a revolution.It is old turbo's that ran seperate wastgates
(the picture posted wasnt by the topic starter)
I thought it was just a general interest type of question?
25-07-2005, 02:41 PM
#36
Originally Posted by Turbosystems
obvious reply to you chip is don't buy a vauxhall lol
This is a ford site and the waste gate penny on a vauxhall wasn't really relavent to it's operation as they always fell off and became bonnet ornaments for the car behind lol
This is a ford site and the waste gate penny on a vauxhall wasn't really relavent to it's operation as they always fell off and became bonnet ornaments for the car behind lol
SO true!
25-07-2005, 02:45 PM
#38
Originally Posted by Turbosystems
chip on a big ford site like this the topic is normally ford unless i am a complete numpty the vauxhall sites talk about vauxhalls
and it is a saph cossie in his siggy
and it is a saph cossie in his siggy
Not to mention:
"why are women so fooking complicated"
"fooking taxman, how do i avoid?"
"is this wart on my knob something to worry about"
Thats what makes it so interesting, the general chat section can literally be about anything!
25-07-2005, 02:45 PM
#39
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Originally Posted by Turbosystems
chip on a big ford site like this the topic is normally ford unless i am a complete numpty the vauxhall sites talk about vauxhalls
and it is a saph cossie in his siggy
and it is a saph cossie in his siggy
25-07-2005, 02:49 PM
#40
Originally Posted by chip-3door
Originally Posted by Turbosystems
chip on a big ford site like this the topic is normally ford unless i am a complete numpty the vauxhall sites talk about vauxhalls
and it is a saph cossie in his siggy
and it is a saph cossie in his siggy
Not to mention:
"why are women so fooking complicated"
"fooking taxman, how do i avoid?"
"is this wart on my knob something to worry about"
Thats what makes it so interesting, the general chat section can literally be about anything!