Jump to content
SAU Community

External Wastegate Opening at higher boost than spring rated

Chereboy

By Chereboy,
in Engines & Forced Induction

 Share

Recommended Posts

BK Grand Master

BK

Posted
Posted

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.

BK Grand Master

BK

Posted
Posted

👍

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.

BK Grand Master

BK

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

Think I might have found the issue20220216_173132.jpg

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

  • Like 1
Chereboy Apprentice

Chereboy

Posted
  • Author
Posted
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 Apprentice

Chereboy

Posted
  • Author
Posted
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 Grand Master

BK

Posted
Posted

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 Apprentice

Chereboy

Posted
  • Author
Posted
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 Grand Master

GTSBoy

Posted
Posted
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 Apprentice

Chereboy

Posted
  • Author
Posted (edited)
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 by Chereboy
BK Grand Master

BK

Posted
Posted
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 Apprentice

Chereboy

Posted
  • Author
Posted (edited)

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

Screenshot_20220220-201933_Chrome.thumb.jpg.cb4ff0e834a1f1d482a3335fe7b3469e.jpg.

Edited by Chereboy

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • thomasLait
      New Stegea Owner

      By thomasLait · Posted

      Hey everyone, I recently bought myself a 2001 Nissan Stegea M35, and I've had a few issues that I had to fix, my car would start intermittently and I had a bad rocker cover leak, after a couple days of looking I finally found a part number that interchanges with the OEM starter as the OEM starters at $1300 and I can't afford that, this starter was only $270 and I replaced the start and still had the same issues, I posted a video asking for help online and it went very well, some guy said it was probably a bad ignition switch so I took my dash apart and turns out my ignition switch was half screwed in and was loose, once it was tightened it fired right up, I found a local place called "Boost factory" and they sold me a part of OEM Nissan rocker covers, they were $600 which was a shocker but I couldn't find them anywhere else, so I installed them and fixed my oil leak as the old rocker cover was cracked and warped, I now need to replace my boost air inlet hoses as they have some cracks.
    • drifter17a
      R34 gtt rb25det neo timing belt kit

      By drifter17a · Posted

      I am being real ocd and do not want to make amy mistakes so appreciate all help provided. I am overly cautious so asking for opinion even if i know the answer   few questions,   1.re tensioner, should spring be greased lightly?    2.tensioner has two washers , one pressure washer and other has recessed/ seat. I am going to put the recessed one facing tensioner where edges are cut out and pressure washer on top   3. my car has custom triger kit sold few years ago by guy who initially built the engine. I moved the crank gear and it moved in and out easy, only way to remove belt is to slide the crankshaft gear forward which I did. I have seen these being very tough to move , anything to do with my woodruff key?   it has a crank sensor shown in purple which I assume reads from the 12 teeth position mounted to the crankcase gear   4. timing belt doesn’t have arrow stating front or back just a arrow which I think is direction of rotation . Do you agree?   5.i figured out why my crankcase cover was worn as there was no washer installed over the crankcase cover before the harmonic balancer was put in place. It is missing, anyone knows the part number? It looks like this https://justjap.com/products/genuine-nissan-crankshaft-timing-gear-rear-plate-washer-nissan-s13-ca18-a31-r32-rb20-r33-r34-c33-c34-c35-rb25?currency=USD   https://tinypic.host/image/IMG-4535.382Zy2 https://tinypic.host/image/IMG-4537.382dSz https://tinypic.host/image/IMG-4534.382q4U  
    • TurboTapin
      New fix for low tyre pressure from bmw

      By TurboTapin · Posted

      CTIS (Central Tire Inflation System) has existed since the 80's. I'm looking into buying a Hummer H1 and they generally included it. 
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      My idle is set at 950rpm though - Moving the timing around 20 degrees is not really what I'd call a calm idle. That said... neither is chop, by definition. The LS ECU likes to adjust timing to hold idle as opposed to air. It'd work, but generally speaking there'd be a discrepancy in the base idle and the IACV would want to move the timing around anyway to maintain said idle. I think I'm just going to keep the timing steady anyway. Preserve my engine mounts.  My aircon is now officially regassed. As the guy was reversing I noticed my reverse lights do not operate, along with my reverse cam. This is a bit distressing, because 100% of guides talk about which wire to connect to backup cams as "the goes with the [other color] wire". Often when doing conversions. Unfortunately the R34 colour wires aren't documented Unfortunately I had a T56 Magnum gearbox with it's reverse switch, which also isn't documented. Unfortunately there's definitely not documentation for people with both of these in the one car. Unfortunately I forgot. After many hours of this, I have a reverse cam and reverse lights again. The wire going through the trans tunnel to the reverse switch had broken. Upon inspection, it looks like this one wire had about 7 spade terminals and extensions in it.. for reasons I cannot possibly comprehend. I also spent the 750 hours required to clean up the wiring behind my head unit which now looks like this: This is a monumental improvement relative to what used to be there WRT triple gauges, head unit, traction control, wideband controller, and whatever the f**k OEM stuff still exists there in various states of connectivity/needed. Next step is to check in at the Exhaust shop to see/confirm how much clearance I have, to decide what mid mufflers or 'resonators' (which are just straight through, narrower mufflers) I can add and hopefully cut out a lot of exhaust leaks, pinhole, v-band or otherwise. But first step will be to 'take a look' before the next step.
    • Dose Pipe Sutututu
      Another little story of weird shit happening

      By Dose Pipe Sutututu · Posted

      Fark the AFM card and Nistune, Haltech Nexus S3, DBW, cruise control, flex fuel, dis dat.  
×
×
  • Create New...