Can someone explain wastegate springs?
- Thread starter TYTILIDIE
- Start date
Re: Can someone explain wastegate springs?
It means that the wastegate wont even begin to operate until the spring pressure is reached in psi boost, think of it like your base boost lvl, I run a progate on the crossover with a 15# spring meaning i can't adjust my boost below 15 no matter how many adjustable controllers are on it ;p
It means that the wastegate wont even begin to operate until the spring pressure is reached in psi boost, think of it like your base boost lvl, I run a progate on the crossover with a 15# spring meaning i can't adjust my boost below 15 no matter how many adjustable controllers are on it ;p
It's just a six
Super Member
Re: Can someone explain wastegate springs?
What is the minimun boost pressure you want to run?
What is the minimun boost pressure you want to run?
Don W.
Stab it and steer it
Re: Can someone explain wastegate springs?
Hmmm, I'll buy part of this answer. If I have a 10psi spring, yes, it's gonna take 10psi of boost to start to move the WG actuator. However it may take more than 10psi of boost to actually move the actuator enough to stop additional boost. Meaning equilibrium may not be reached until, say, 12psi of boost. Did that make sense or am I full of it.:rotf: I wouldn't think it's directly pound for pound. I would agree that anything less than 10psi (assuming the turbo is spinning fast enough) ain't gonna happen.
Hmmm, I'll buy part of this answer. If I have a 10psi spring, yes, it's gonna take 10psi of boost to start to move the WG actuator. However it may take more than 10psi of boost to actually move the actuator enough to stop additional boost. Meaning equilibrium may not be reached until, say, 12psi of boost. Did that make sense or am I full of it.:rotf: I wouldn't think it's directly pound for pound. I would agree that anything less than 10psi (assuming the turbo is spinning fast enough) ain't gonna happen.
THEMADTYPH00N
Active member
Re: Can someone explain wastegate springs?
No, you have to have a spring thats fairly close to the max boost you want to run. If you had a 2 psi spring you would never be able to bleed enough air away from the gate to make 25 psi.
TYTILIDIE said:
No, you have to have a spring thats fairly close to the max boost you want to run. If you had a 2 psi spring you would never be able to bleed enough air away from the gate to make 25 psi.
Tooky
Serious about performance
Re: Can someone explain wastegate springs?
Be advised that the PT60 is actually the 2nd smallest PTE turbo, right between the PT44 and PT51 (check with PTE yourself if you dont believe me). I have a PT51 with vortec heads and a healthy 218* cam, and I maxed it out at 16-20 PSI.
I was just looking at your sig. Obviously if you run the PT60 on stock heads it will support a higher boost pressure.
Be advised that the PT60 is actually the 2nd smallest PTE turbo, right between the PT44 and PT51 (check with PTE yourself if you dont believe me). I have a PT51 with vortec heads and a healthy 218* cam, and I maxed it out at 16-20 PSI.
I was just looking at your sig. Obviously if you run the PT60 on stock heads it will support a higher boost pressure.
JSM
Active member
Re: Can someone explain wastegate springs?
Depends on WG. If your talking Tial or similiar there are 2 ports. One on bottom is hooked to pressure to help it open, if you duct pressure to top it will help close it.
I have seen 10psi springs make over 30psi just put pressure to the top, nothing to the bottom.
For example right now I have 4psi springs in my wg's. I have pressure going to the bottom port, nothing to the top. This gives me minimum boost for tuning purposes which for me is between 4-7psi. That is the least amount I can run. When I get ready to run more I will be ducting pressure to the top via the solenoid controlled by ECM to hold the valve closed above the 7psi I see now. (I do need bigger nut sacks first though).
Also remember the more boost you run, the less the wastegate must work.
THEMADTYPH00N said:
Depends on WG. If your talking Tial or similiar there are 2 ports. One on bottom is hooked to pressure to help it open, if you duct pressure to top it will help close it.
I have seen 10psi springs make over 30psi just put pressure to the top, nothing to the bottom.
For example right now I have 4psi springs in my wg's. I have pressure going to the bottom port, nothing to the top. This gives me minimum boost for tuning purposes which for me is between 4-7psi. That is the least amount I can run. When I get ready to run more I will be ducting pressure to the top via the solenoid controlled by ECM to hold the valve closed above the 7psi I see now. (I do need bigger nut sacks first though).
Also remember the more boost you run, the less the wastegate must work.
Tooky
Serious about performance
Re: Can someone explain wastegate springs?
But in light of the fact that you're at high altitude, that throws things off considerably, so I'm not sure what to tell you there.
You said you wanted to run "25 PSI", I was pointing out that everything I know tells me a PT60 would be maxed out well before that point on the combo you're proposing. It still should make good power up to whatever point it maxes out at (maybe 18-20 PSI depending on what cam and how ported your vortecs are.)TYTILIDIE said:
But in light of the fact that you're at high altitude, that throws things off considerably, so I'm not sure what to tell you there.
opcorn2: