Clamped boost line wont go over 15psi MODIFIED CAR
03-11-2014, 01:07 AM
#16
once the line is clamped the wastegate would open to whatever is the spring capacity, if this is a shimmed stock 15psi is probably right with a tired wastegate the valve is probably opening and bleeding boost, with all the mods you have why would you use a shimmed wastegate, been there done that.
When you clamp the wastegates feed line you're sending no air to the diaphram which means the wastegate won't open at all, preventing bleed off of exhaust, creating a self destructing loop to the turbo. If you are clamping the feed line and reach a max level of 15 psi, then your wastegate is failing (stuck partly open). When you clamp the wastegate your car will not have a boost cap, or i suppose the cap will be when the motor or turbo destructs. this is exactly why when you read about wastegate testing on clarks garage they say to clamp the line and to not drive the car over a certain rpm.
03-11-2014, 01:25 AM
#17
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But i did clamp it and I did drive it over a certian RPM and the only psi achieved AT MAX was 15psi not a self destruction so i dont understand what you are now trying to say. Is it the wastegate failing that is the issue? or is it something else...
03-11-2014, 01:41 AM
#18
The wastegate is stuck partly open, yes. In a working system. when your car enters boost some of that boost pressure is sent from the j hard pipe to the wastegate. this pressure is what forces against the diaphram in the wastegate which pushes the valve open. the valve opening is what regulates the exhaust flow which spins your turbo. if the valve stays shut and doesnt open the car will make more boost which makes more exhaust which makes more boost which makes more exhaust and so on and so on until the car over boosts and causes damage. when you clamp the wastegate feed line your preventing the wastgate from opening at all creating the loop i just described. now you ask, well i clamped the line why didnt it cause damage and max at 15 psi? this is because the valve in your wastegate is stuck slightly open, where exhaust is constantly leaving not allowing enough pressure to build up in the crossover pipe.
03-11-2014, 01:51 AM
#19
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Where the hell you got that? Have you taken a look at the 951 system, he has a stock wastegate not a dual port, the pressure of the boost will open the valve, go do your homework
03-11-2014, 01:54 AM
#20
your an idiot on a stock wastegate the boost pressure opens the valve. how does a wastegate open if he clamps the line to the wastegate? it doesnt. ive tested wategates more then you im positive.
03-11-2014, 01:59 AM
#21
CAUTION!
Use extreme caution when driving the car with the actuating line clamped off. The overboost protection system is defeated by clamping the line. If the charging system is intact, you can overboost the engine and cause extensive damage.
Use extreme caution when driving the car with the actuating line clamped off. The overboost protection system is defeated by clamping the line. If the charging system is intact, you can overboost the engine and cause extensive damage.
heres the link http://www.clarks-garage.com/shop-manual/exh-02.htm
Nice try though,
03-11-2014, 02:08 AM
#22
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Lol you don't what he'll you are talking about, he has aftermarket chips, over boost protection is overrided. Is this your first turbo? Have you ever modded one?
03-11-2014, 02:09 AM
#23
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Also he has a mbc so no cv , get it
03-11-2014, 02:10 AM
#24
you can try to argue with me all day. but if he clamps the wastegate line(the line that supplies the pressure for opening the wastegate) then the wastegate will stay closed and the car will over boost. if it doesnt then the wastegate is seized and stuck open.
and yes your right, stock the car would send a fuel shutoff in the attempt to prevent over boost, with aftermarket chips this doesnt happen. the car can boost as high as you want. thanks for adding to my point. you obviously dont know these cars. quit trying to explain things you dont understand yourself.
over boost protection is overrided
03-11-2014, 02:14 AM
#25
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If you think i need to do my homework then maybe you can read exactly what i just stated from a 951 expert
heres the link http://www.clarks-garage.com/shop-manual/exh-02.htm
Nice try though,
heres the link http://www.clarks-garage.com/shop-manual/exh-02.htm
Nice try though,
By clamping the hose, you're using spring pressure only!!!
03-11-2014, 02:18 AM
#26
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Clamping the line is like having no line at all, than it's the mechanical part that controls the wastegate the design is simple pressure from the crossover pushes the valve open, the stock wastegate will start to bleed around 7psi.
03-11-2014, 02:18 AM
#27
a stock wastegate is always closed, it opens in boost from boost pressure being sent to the top of the diaphram. if you connect a line from the j pipe to the wastegate sending it max pressure the wastegate will open quickly and results in low boost. this is why on a single port setup you use a mbc to restrict the flow to the wastegate to raise boost.
03-11-2014, 02:19 AM
#28
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