Jump to content
SAU Community

Recommended Posts

  • Replies 886
  • Created
  • Last Reply

Top Posters In This Topic

Can you confirm a couple of things...

When you pressure test the system, u remove the afm and put in ur test fitting. That means ur intake pipe is in the pressure system, yet has non pressure areas being compressed. Ie your bov pipe and presumably the breather hoses that go from the ex rocker to the intake pipe, yes?

To rule that out please do the test on the system post turbo instead of pre, and make sure ur motor is on TDC. Then work ur way thru to see where its leaking, work forwards... So from there go to ur cooler entry, cooler exit, crossover pipe, throttle body. Work forward until u track how far the leak is into the system.

Ur breather shouldn't need ur finger put over the gromit, that means ur pressurizing ur sump... Obviously from the ex rocker breather via the intake. Otherwise ur PVC is ficked too. Test this before anything else.. Then test the guys infinite boost (blocked actuator) theory and see if it can actually make that boost up high when it cant possibly bleed it off.. If it can do it then u know the issue is boost control (actuator/wastegate arrangement).

Report back and well all help from there.

Yes that's how I've always done it, it did blow my intake pipe off once, took 2 hours to get it all back on and ready to test again. My bov does have a tiny little leak on the outlet side between the bov and the pipe adapter, not a problem during running. I no longer have the pipe that goes to the intake pipe from the tappet cover, that's the pipe I put my finger in. You can see it in the photos.

it will make over 20psi at 6500rpm, hard to hold it steady there without going stupidly fast. so i crept up to 6500rpm at between 15 and 20 psi then i put my foot down a bit quicker to see if it would make 25. not sure if this is a deffinative answer but makes me feel better. so new actuator and new tune and my car should be fine, hopefully the heat soak issue will be resolved with the tune. thanks everyone.

whats running to your p/s pump if your using that as a boost source?

is the p/s side blocked off?

did you use new hose for your boost to wastegate feed? one of the factory lines has restrictors in it

DVS can you pm me a prIce on a retune please.

Thought i did buddy, ill send u another one.

Let me know how u go with the new actuator, more preload, and put the boost source for the actuator in the cooler pipe just out of the turbo.

it will make over 20psi at 6500rpm, hard to hold it steady there without going stupidly fast. so i crept up to 6500rpm at between 15 and 20 psi then i put my foot down a bit quicker to see if it would make 25. not sure if this is a deffinative answer but makes me feel better. so new actuator and new tune and my car should be fine, hopefully the heat soak issue will be resolved with the tune. thanks everyone.

How long ago in that HG thread did I say it was the actuator lol.

This IS a definitive answer. Your car made more boost at points it never could when you eliminated the actuator from the equation. Done and done. Get that new bitch on her and enjoy.

Sarge. I did believe you but I didn't have a safe way to test it, that's where my wife comes in handy.

There isn't any boost feed going to the ps pump, I used new vacuum line to the turbo.

Yer I deleted it by accident and couldn't remember what you said.

That's the vacuum valve on a neo rb25. That's what I took the line off, il trace the other line and see if it's causing a leak.

Edited by lilcrash

I thought the Hypergear turbos had a nipple on the outlet of the turbo already for that purpose...

If not, do as Jez has said and put a brand new nipple on the intercooler pipe, nice and close to the turbo.

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



  • Similar Content

  • Latest Posts

    • Have a look at that (shitty) pic I posted. You can see AN -4 braided line coming to a -4 to 1/8 BSPT adapter, into a 1/8 BSPT T piece. The Haltech pressure sender is screwed into the long arm of the sender and factory sender (pre your pic) into the T side. You can also see the cable tie holding the whole contraption in place. Is it better than mounting the sender direct to your engine fitting......yes because it removes that vibration as the engine revs out 50 times every lap and that factory sender is pretty big. Is it necessary for you......well I've got no idea, I just don't like something important failing twice so over-engineer it to the moon!
    • Yup. You can get creative and make a sort of "bracket" with cable ties. Put 2 around the sender with a third passing underneath them strapped down against the sender. Then that third one is able to be passed through some hole at right angles to the orientation of the sender. Or some variation on the theme. Yes.... ummm, with caveats? I mean, the sender is BSP and you would likely have AN stuff on the hose, so yes, there would be the adapter you mention. But the block end will either be 1/8 NPT if that thread is still OK in there, or you can drill and tap it out to 1/4 BSP or NPT and use appropriate adapter there. As it stands, your mention of 1/8 BSPT male seems... wrong for the 1/8 NPT female it has to go into. The hose will be better, because even with the bush, the mass of the sender will be "hanging" off a hard threaded connection and will add some stress/strain to that. It might fail in the future. The hose eliminates almost all such risk - but adds in several more threaded connections to leak from! It really should be tapered, but it looks very long in that photo with no taper visible. If you have it in hand you should be able to see if it tapered or not. There technically is no possibility of a mechanical seal with a parallel male in a parallel female, so it is hard to believe that it is parallel male, but weirder things have happened. Maybe it's meant to seat on some surface when screwed in on the original installation? Anyway, at that thread size, parallel in parallel, with tape and goop, will seal just fine.
    • How do you propose I cable tie this: To something securely? Is it really just a case of finding a couple of holes and ziptying it there so it never goes flying or starts dangling around, more or less? Then run a 1/8 BSP Female to [hose adapter of choice?/AN?] and then the opposing fitting at the bush-into-oil-block end? being the hose-into-realistically likely a 1/8 BSPT male) Is this going to provide any real benefit over using a stainless/steel 1/4 to 1/8 BSPT reducing bush? I am making the assumption the OEM sender is BSPT not BSPP/BSP
    • I fashioned a ramp out of a couple of pieces of 140x35 lumber, to get the bumper up slightly, and then one of these is what I use
    • I wouldn't worry about dissimilar metal corrosion, should you just buy/make a steel replacement. There will be thread tape and sealant compound between the metals. The few little spots where they touch each other will be deep inside the joint, unable to get wet. And the alloy block is much much larger than a small steel fitting, so there is plenty of "sacrificial" capacity there. Any bush you put in there will be dissimilar anyway. Either steel or brass. Maybe stainless. All of them are different to the other parts in the chain. But what I said above still applies.
×
×
  • Create New...