Wastegate Problem - 50mm Hks
#1
Wastegate Problem - 50mm Hks
Members,
I`m having an issue with my HKS 50mm wastegate (genuine). Here`s the history
FD HKS Cast iron Manifold with 50mm wastegate...Turbonetics T-66 A/R .70
I have a 10 psi spring in the wastegate and sometimes it would spike to 12/15 psi
I`ve eliminated the Greddy Profec-b and just connect the wastegate straight. (from the turbo compressor to the side of the gate) still creep to 12/15 psi
So I`ve check the diaphragm and done alot of bench test to see if its sticking and its not.
I`ve got tired of trying to figure this out so I bought an ebay replica. I installed and the same **** happends.
I can't figure out the life of me what the hell is the problem.
The dump tube is an S-bend, could this be the reason for the spiking?
Please Advise
I`m having an issue with my HKS 50mm wastegate (genuine). Here`s the history
FD HKS Cast iron Manifold with 50mm wastegate...Turbonetics T-66 A/R .70
I have a 10 psi spring in the wastegate and sometimes it would spike to 12/15 psi
I`ve eliminated the Greddy Profec-b and just connect the wastegate straight. (from the turbo compressor to the side of the gate) still creep to 12/15 psi
So I`ve check the diaphragm and done alot of bench test to see if its sticking and its not.
I`ve got tired of trying to figure this out so I bought an ebay replica. I installed and the same **** happends.
I can't figure out the life of me what the hell is the problem.
The dump tube is an S-bend, could this be the reason for the spiking?
Please Advise
#2
Laying Down Rotary Law
your turbine might be too small and is overpowering the wastegate
the smallest you should use for any 50 trim and above turbo on a rotary is .81
running lean can also cause spikes
the smallest you should use for any 50 trim and above turbo on a rotary is .81
running lean can also cause spikes
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#12
yes it was connected...
The compressor vacuum line from the turbo when to the IN of the Greddy profec-b stepper box.
The OUT from the box when to the top of the WG
The side of the WG went to the intake manifold.
But I`ve eliminated it all together and it still spikes.
#17
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1.5" plus the fact that it has an s-bend doesn't help flow through the wastegate. 50mm is just short of 2" and you should run piping as such from the wastegate. This will likely be the source of your problems.
#18
Tenseiga
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got the hks cast with a 50mm hks wg.
running a 62-1 with exhaust at 1.00 divided i think.
Keeps perfect 14.7 all the way through the power band (ebay spring no less).
The 10psi spring was all perfect (original).
running a 62-1 with exhaust at 1.00 divided i think.
Keeps perfect 14.7 all the way through the power band (ebay spring no less).
The 10psi spring was all perfect (original).