gt35r/wastegate size?

pln

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Apr 10, 2007
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eskilstuna.SWEDEN
I had no problem with my 40mm wastegate at first, but at higher boost and rpm (6000 and 18psi).. it could not evacuate enough exhaust and boost took off way too fast. Building 50mm wastegate now. this is with gt3582r
 

MRSUPRA

New Member
Apr 11, 2005
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I have a 40mm HKS wastegate and it has worked flawlesly between 16 and 24psi on my GT35R.

Why are you only running 10 to 12psi?
 

pln

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Apr 10, 2007
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eskilstuna.SWEDEN
I can add some more info on gt35. My 5psi spring was too weak. It opened at 13psi even with EBC programmed for higher psi.. and regardless of duty. I changed to 12psi spring and the boost was rock solid and back on 18 psi.

Just wanted to chare info so no one wastes time for nothing.
 

IJ.

Grumpy Old Man
Mar 30, 2005
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pln;1382102 said:
I can add some more info on gt35. My 5psi spring was too weak. It opened at 13psi even with EBC programmed for higher psi.. and regardless of duty. I changed to 12psi spring and the boost was rock solid and back on 18 psi.

Just wanted to chare info so no one wastes time for nothing.

Might want to check/change the plumbing on the WG as mine would hold 5psi all day on a 5psi spring.
 

pln

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Apr 10, 2007
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eskilstuna.SWEDEN
5psi was no problem . It was at higher boost wg flew open.. 13psi. I put plumbing under pressure and all wacum-lines to solenoid (AEM) and w-gate, and found no leakage at all. Allso disambeled w-gate (brand new) and found no error there.
 

IJ.

Grumpy Old Man
Mar 30, 2005
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I run mine Turbo Compressor > Bottom Port of WG T'd to NC on the Solenoid>COM on the Solenoid to Top Port on the WG.

Doing it this way prevents the Boost blowing the Valve off the seat.

Not sure on your terminology but it sounds much the same?

Mine ran stable to 30psi on a 5psi spring with this configuration.
 

pln

Get the gate!
Apr 10, 2007
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eskilstuna.SWEDEN
Sound like we have same set up on vacumlines. Its strange.. Maybe i have som error somewhere but I sure have not found it. It was only when I changed to a stronger spring that the problem was solved. Do you have gt35? One theori I had was gt35 build more exhaust pressure then other turbos?
 

IJ.

Grumpy Old Man
Mar 30, 2005
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pln;1382157 said:
Sound like we have same set up on vacumlines. Its strange.. Maybe i have som error somewhere but I sure have not found it. It was only when I changed to a stronger spring that the problem was solved. Do you have gt35? One theori I had was gt35 build more exhaust pressure then other turbos?

I ran the same config on a GT30R, GT35R and a T04z first using an AVCR then the MoTeC to control boost.

What have you done with the 3rd port on the Solenoid?
 

pln

Get the gate!
Apr 10, 2007
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eskilstuna.SWEDEN
no offence taken :icon_bigg

everything can go wrong...

Not sure what you refer to. I have port 1 to vacum pressure and port 2-top side of can. I also have same dimentions on hoses and on w-gate ports.
 

pln

Get the gate!
Apr 10, 2007
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eskilstuna.SWEDEN
IJ.;1382172 said:
On the Boost Control Solenoid

3 ports

1= NC/Compressor outlet-bottom port on the WG

2= NO/muffler

3 = COM/top port on the WG

ok. I hooked up according to AEM manual for ext-w-gate. Maybe its just my spring. It worked fine on 40mm w-gate but not on 50mm. Seller said it works with both. Maybe its mapecu bugging. I just see now it works with a stronger spring.