Another question regarding my turbo installation.
My turbo - Garrett GT2860RS doesn't have a nipple on the housing for the wastegate actuator.
Am I best drilling/tapping one or can I connect this hose with a Tee in the vac line?
If not, please can you explain why this wouldn't work. I'm looking for the best possible boost response so I'm happy to go with whichever way is the best.
Cheers guys.
Does it have an internal wastegate?
Please don't drill into your turbo s:) :) s:) haha
Just tap boost pressure from the throttle body area. A lot safer. That's where ours gets it from for the boost controller
it's always best to take the pressure reference for the waste gate from as close to the turbo as possible - that way you avoid boost spikes when going from partial to full throttle.
The ECU should be fed with a pressure reading after the throttle body to ensure accurate fuelling.
Truth.
Still, is this still not a better idea?
(https://uploads.tapatalk-cdn.com/20171028/e53687b3d89c9cc621b37d965c729d4b.jpg)
I saw that before. I was just not sure if it was as reliable as a drilled and tapped brass fitting. Straight after that silicone piece on mine (obviously has no nipple in it yet) is the intercooler pipework. Id be happier taking that small bend of pipework into work and drilling/welding a fitting in as there's less to go wrong it I make a pigs ear of it.
Since the internal diameter is bigger and thus volume of the intercooler pipework greater, will this give any different readings with regards to the pressure?
On a side note, what type of boost controller are you using shnazzle?
Quote from: "woodypk"I saw that before. I was just not sure if it was as reliable as a drilled and tapped brass fitting. Straight after that silicone piece on mine (obviously has no nipple in it yet) is the intercooler pipework. Id be happier taking that small bend of pipework into work and drilling/welding a fitting in as there's less to go wrong it I make a pigs ear of it.
Since the internal diameter is bigger and thus volume of the intercooler pipework greater, will this give any different readings with regards to the pressure?
On a side note, what type of boost controller are you using shnazzle?
I can't imagine there will be any pressure or response difference whether it's as on the pic or in the housing. Not significantly anyway.
We/my wife has the misfortune of having a Unichip piggyback solution with associated unichip boost controller. It does the job. Overboost protection being the main thing.
So what if the fitting was installed a little further downstream towards the intercooler? Is the basic consensus that anywhere between the turbo and the throttle body is acceptable but closer the housing, the better?
I think the point Steve was (very validly) making is that you don't want any delays what so ever in pressure readings. You already have a bit of overhead with signal processing speed, the last thing you want is for your boost controller to read that massive spike just too late and blow a peep hole in your block before it can close that boost actuator or cut ignition.
So if you catch boost at the manifold, it's too late. By the time it reads overboost there, it's in your engine.
If you catch overboost at the turbo, you have 0.something seconds for your boost controller to close that actuator and let the wastegate pop or cut ignition so that at least yoy don't ignite that deadly mixture
Whereas a boost gauge, you want at the manifold so that you can read what the engine is actually getting.
I'll let the big boys answer exactly how close to the turbo is minimum s:) :) s:)
Oh, and in case you wondered... Ours is tapped at the manifold. So, not optimal, but still works and the controller has caught a good few overboost scenarios. So, don't let my previous post scare you.
Thanks for the explanations. The only reason I'm confused is because since starting my research on turbo setups, I've only ever seen the wastegate actuator nipple have a hose directly to the outlet of the turbo. I'm just trying to make sure that when my setup is complete, I'm minimising as far as reasonably possible, any potential damage to the engine due to setting it up wrong since I'm literally learning as I go.
It is a fun project though!
Quote from: "woodypk"Thanks for the explanations. The only reason I'm confused is because since starting my research on turbo setups, I've only ever seen the wastegate actuator nipple have a hose directly to the outlet of the turbo. I'm just trying to make sure that when my setup is complete, I'm minimising as far as reasonably possible, any potential damage to the engine due to setting it up wrong since I'm literally learning as I go.
It is a fun project though!
I wish it were my project too s:) :) s:)
To be honest, I never knew there were turbos without the nipple on the housing. Usually the housing is directly piped to the actuator, which seems like the best solution.
But, a lot of exhaust manifolds have built in outlets for an aftermarket blow off valve. So, I guess that's why. Ultimate control over your boost.
So I guess the gt2860rs is built for use with such a manifold
Garrett GT and GTX series don't have pressure signal nipple.
I don't know why but it is like that.
Greddy turbo are in the same situation.
You can drill the compressor housing and put a nipple or you can use a metal pipe insert with a nipple or... many solutions.
However, as metioned, that is one of the points where things can go wrong.