External Wastegate Opening at higher boost than spring rated

[BK]

Do the bottom port test again off car to confirm it definitely passes to the top port, therefore being faulty. If it's got a split diaphragm it'll be obvious when disassembled with a tear in it - It's about the only thing that really fails on them.

[Chereboy]

Alright, thanks so much again man, everyone had been heaps of help. I've been soo stuck until now, I'll give an update hopefully tomorrow afternoon after work

[BK]

👍

Just be careful when you pull the gate apart - remember big spring in there that can send the cover into your face if it flies apart without keeping it compressed on disassembly.

[Chereboy]

Not gonna lie, I'm actually really happy and thankful you just said that cause I know what would have happened aha

[Chereboy]

The Air Compressor was at 5psi throughout the testing

Edited February 16, 2022 by Chereboy

[Chereboy]

Think I might have found the issue

Edited February 16, 2022 by Chereboy

[BK]

On 16/02/2022 at 4:02 PM, Chereboy said:

Think I might have found the issue

Good work, you owe me a carton 😄

That gate diaphragm is exactly the one I linked you to from RHDjapan, so around $150.

HKS part 1499-RA057

[Chereboy]

On 16/02/2022 at 5:41 PM, BK said:

Good work, you owe me a carton 😄

That gate diaphragm is exactly the one I linked you to from RHDjapan, so around $150.

HKS part 1499-RA057

Thanks soo much man, I honestly appreciate it soo damn much. You've been a huge help.

[Chereboy]

On 16/02/2022 at 5:41 PM, BK said:

Good work, you owe me a carton 😄

That gate diaphragm is exactly the one I linked you to from RHDjapan, so around $150.

HKS part 1499-RA057

Also just curious on how I would fit it on as the one on my wastegate is round but the online one is squared off, do I just run a knife around the outside of the wastegate after clamping it shut? Thanks again

[BK]

Nah the rhd one is round - have a good look at all the pictures again - it is curved and just a bit wrinkled up. It'll take shape when installing.

[Chereboy]

On 16/02/2022 at 6:31 PM, BK said:

Nah the rhd one is round - have a good look at all the pictures again - it is curved and just a bit wrinkled up. It'll take shape when installing.

Damn aha, you're spot on again

[tridentt150v]

On another tack...10psi sounds a bit low.  You would need to test, but a 14psi would probably suit that turbo and setup a bit better.

[Chereboy]

On 18/02/2022 at 8:46 PM, tridentt150v said:

On another tack...10psi sounds a bit low.  You would need to test, but a 14psi would probably suit that turbo and setup a bit better.

Hey mate, so your saying it would be worth my while to have a 14pound spring in there instead of the 7pound one? I'm also going to be tuning the car soon after the diaphragm arrives and I'll probably be pushing close of not a little more than 20psi. I'm also probably just going to have the ECU control the boost so I'll just delete the Blitz one

[GTSBoy]

On 2/20/2022 at 1:16 PM, Chereboy said:

close of not a little more than 20psi.

The general rule is that you do not want to use a spring that is less than half the boost you want to bleed up to, and more spring is generally better than less. So for 20+ psi, you definitely want to be in the 14 psi spring range, rather than 10, and you definitely don't want to be using a 7.

[Chereboy]

On 20/02/2022 at 4:27 PM, GTSBoy said:

The general rule is that you do not want to use a spring that is less than half the boost you want to bleed up to, and more spring is generally better than less. So for 20+ psi, you definitely want to be in the 14 psi spring range, rather than 10, and you definitely don't want to be using a 7.

Alright mad, too easy, I'll definitely be sourcing out at least a 14 psi spring setup. Thanks mate

Edited February 20, 2022 by Chereboy

[BK]

On 20/02/2022 at 3:26 PM, Chereboy said:

Alright mad, too easy, I'll definitely be sourcing out at least a 14 psi spring setup. Thanks mate

As your HKS standard gate has no spring preload adjustment on it, I'd say you want the purple spring as it should be about 1.1 bar fitted being that's minimum on the adjustable version  Available springs from RHDjapan attached, although HKS themselves say only the yellow and purple springs are available now and that the original standard gate spring selection is discontinued.

https://www.rhdjapan.com/search/brands/hks/category/turbo-and-na-systems/?q=Spring

[Chereboy]

Alright, I'm gonna order the purple one tomorrow, I'll see if they can add it to my pending order for the diaphragm as it's apparently going to be sent out on the 21st.

Anyone know how long I'm looking at it taking to reach Sydney NSW? I paid for the DHL shipping and wasn't really sure what it meant by 1-5 days as I'm sure it will take much longer than that to arrive and 5 days will be the 21st when I think they are saying it will be sent out. Thanks guys, don't really understand their shipping system

.

Edited February 20, 2022 by Chereboy

[BK]

Quick. I'm getting stuff out of Japan from them quicker than the east coast at the moment from like Just jap, Golebys etc.

[r32-25t]

Usually when I order from rhd it leaves on the Friday afternoon and arrives Monday morning or Tuesday at the latest