What size waste gate?

That_sick_LS

New Member
Hey all I have a b16a with a turbonetics t3/t4 setup and am looking to push like 7psi through it and am just wondering what size wastegate i should get because right now the waste gate i have stays open but still builds up to like 11psi from what i have seen when vtec hits and your not even all the way on it in third gear help me please the screw was takin out of this waste gate but i am not sure if i can find another one thanks
 

That_sick_LS

New Member
ya i think i got a guy who might be able to get a 7psi spring for me so i might try installing that in current wastegate so i could save about $200 on a new one but if it doesn't work i guess tial 38 it is
 


theshodan

Turbo Design Specialist
The new Tial 38mm wastegates now come as a v-band setup. Many new manifolds have an option to weld to that now. Manual boost controllers are decent to start, I recommend Hallman over turboxs. Let me know if you need options for electronic boost controller.
 

patrick4588

Integra God
That_sick_LS said:
ya i think i got a guy who might be able to get a 7psi spring for me so i might try installing that in current wastegate so i could save about $200 on a new one but if it doesn't work i guess tial 38 it is
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unless you have an upgraded map sensor, i hope you werent going over 10.8psi. and duh you need to change the spring to the right size.
 

speedin

The Transporter
patrick4588 said:
unless you have an upgraded map sensor, i hope you werent going over 10.8psi. and duh you need to change the spring to the right size.
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What size WG do you have now? Most aftermarkets come with about a 38, and that fine.


You NEED to get that screw first, then go get an appropriate WG spring for your boost. Or just get a new wg.

for him to use a BC in his case he would have to modify the boost signal up from what he wants to the WG. (bump a 7psi signal to 11psi to match the spring) The point of a BC is to lower the boost signal to the WG
 

That_sick_LS

New Member
ahhh help me lol I bought a 38mm Turbonetics wastegate and I dont have a boost controller it has two lines one that says boost one that says vacuum I was told to just T them together so I have to kind of eliminate the boost one but that seems very wrong... It has a 8psi spring in it and it stays fine at 8 psi until i hit vtec than BAM 15psi in like less than a second please help me out thanks
 

patrick4588

Integra God
um fuck no, dont put them together. only use the vacuum line. if you use both it wont open at all. the boost nipple is for a boost controller and thats it. leave it open if you dont have a boost controller
 

That_sick_LS

New Member
patrick4588 said:
um fuck no, dont put them together. only use the vacuum line. if you use both it wont open at all. the boost nipple is for a boost controller and thats it. leave it open if you dont have a boost controller
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THANK YOU SOOO MUCH I will go try it right away the guy said that it wouldn't open if I did leave it open thank you thank you thank you lol
 

That_sick_LS

New Member
That_sick_LS said:
THANK YOU SOOO MUCH I will go try it right away the guy said that it wouldn't open if I did leave it open thank you thank you thank you lol
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Ok... Never mind that did not work it actually got worse, last time with the the two together i got to 15psi in third gear maybe half throttle now I went to 20psi in like 40% throttle =/ I need help, if I just buy a manual boost controller is that gonna fix the prob? any and all comments appreciated
 

patrick4588

Integra God
no. the vacuum fitting opens the valve. the top fititng holds it closed for a boost controller (at least with any wastegate ive seen). check your vacuum source for the wastegate and make sure you have it hooked up right.
 
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