let me see if I got this right ( turbo wastegate Q )
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let me see if I got this right ( turbo wastegate Q )
I have been reading Maximum boost by Corey Bell ( thanx for the tip ...the book is GREAT !!!! )
I got a Q about electronic boost controllers. I know the are put on the reference line for the wastegate. They make a controlled leak to fool the wastegate . Fine but lets say I am running 6 psi of boost ...... and I let the controller leak out 4 psi ....is it safe to say the amount leaked out is directly proportional to the boost after the fact ( so it would make 10 psi with 4 psi leaked out so to speak )
do I got it ,or am I out in left field
TIA
I got a Q about electronic boost controllers. I know the are put on the reference line for the wastegate. They make a controlled leak to fool the wastegate . Fine but lets say I am running 6 psi of boost ...... and I let the controller leak out 4 psi ....is it safe to say the amount leaked out is directly proportional to the boost after the fact ( so it would make 10 psi with 4 psi leaked out so to speak )
do I got it ,or am I out in left field
TIA
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From: Timrå, Sweden
Car: 1984 Corvette
Engine: Turbo 350
Transmission: 4L80E with TCI T-Com
Electronic boost controllers measure the actual boost.
The controller valve uses a constant frequency and variable duty-cycle. ( PWM ) The controller will adjust the duty cycle untill the preset boost level is reached.
Yes, If the wastegate spring is set at 6 psi and you set the controller at 10 psi, then valve will 'leak out' 4 psi when you have 10 psi boost.
No, the amount leaked out is NOT directly proportional to boost.
At 9 psi boost it will 'leak out' more to keep the wastegate closed. At 11 psi it might not 'leak out' anything to force the weastegate open.
The controller valve uses a constant frequency and variable duty-cycle. ( PWM ) The controller will adjust the duty cycle untill the preset boost level is reached.
Yes, If the wastegate spring is set at 6 psi and you set the controller at 10 psi, then valve will 'leak out' 4 psi when you have 10 psi boost.
No, the amount leaked out is NOT directly proportional to boost.
At 9 psi boost it will 'leak out' more to keep the wastegate closed. At 11 psi it might not 'leak out' anything to force the weastegate open.
Last edited by JoBy; Jul 7, 2005 at 03:27 PM.
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