VTG upgrade what to go for next?
Registered User
Joined: Apr 2006
Posts: 1,677
From: London (UK)
Rep Power: 156
P.S. I was just talking from a money saving point of view and also a big performance gain over the vtg.
Also Sean has a controller plugin that allows the stock ecu to control the efrs so need for additional boost controllers which is some food for thought too.
In regards to having a good core, that is an excellent point. This will not be a good core for an upgrade most likely. When we lose such a large section of blade the amount of imbalance is pretty high. This will drive high shaft motion and squeeze the oil film out in the bearings (single radial bearing in this design, "semi-float" design, cheaper and less noise, common in automotive). Once you tear this turbo down, you should see the radial bearing is damaged allowing for high clearance. The additional clearance will let the wheels contact the housings. On the compressor side its not too bad because you would be boring and re-profiling that side anyways for the bigger compressor wheel. On the turbine side is where the issue would be. These turbine stages have the an insert that connects the volute to the discharge. That insert is profiled to the turbine wheel and completes the housing. I would expect it to be damaged. That insert in tac welded onto the turbine housing and holds the vane pack in place. In addition you will need a new turbine wheel/shaft assembly.
So essentially, the parts you need for re-use (bearing housing(might be damaged too), turbine housing, turbine shaft/wheel assembly) in the upgrade have a likelihood of being damaged.
I think ES Motor will point you in the right direction, their achievements speak for themselves. If you have more turbocharger specific questions I'm always happy to help.
So essentially, the parts you need for re-use (bearing housing(might be damaged too), turbine housing, turbine shaft/wheel assembly) in the upgrade have a likelihood of being damaged.
I think ES Motor will point you in the right direction, their achievements speak for themselves. If you have more turbocharger specific questions I'm always happy to help.
Your info is highly appreciated mate, and yes i would like to ask some questions in the next 2 days as i am gona split open both turbos and see if i get get myself temporarily sorted out i hate the car being parked. until i decide what i want to go with best. i want a strong car on pump gas 98 pushing mid 600s to the wheels. so give me your best thought guys and off course on race gas somewhere in the 700s if possible.
Can we get more info regarding these turbos, and the cost and their effect on a stock motor car!?
If it were me after all the experience i have been through over the years i would be not going for a vtg upgrade as at some point you will want more.
Personally I would speak with SRM and go for their efr bolt on kit as they spool great and can achieve at low boost what vtg achieve with hi boost. Less boost equals less stress and less heat and much more power down the line
Either way I hope you sort your car out.
Personally I would speak with SRM and go for their efr bolt on kit as they spool great and can achieve at low boost what vtg achieve with hi boost. Less boost equals less stress and less heat and much more power down the line
Either way I hope you sort your car out.
That's fair enough. All the best and good luck
P.S. I was just talking from a money saving point of view and also a big performance gain over the vtg.
Also Sean has a controller plugin that allows the stock ecu to control the efrs so need for additional boost controllers which is some food for thought too.
P.S. I was just talking from a money saving point of view and also a big performance gain over the vtg.
Also Sean has a controller plugin that allows the stock ecu to control the efrs so need for additional boost controllers which is some food for thought too.
Guys anyone tried or had experience with the EFR turbo kit from SRM. i tried to check them out on the website and not much info about them. are they new? and no1 tried them yet? it bolts right on directly with no issues? or i need to remove actuators from my existing turbos and install them? or it comes ready with everything just bolt it connect oil lines and start the car?
Last edited by Najis997; Mar 8, 2017 at 04:05 AM.
Registered User
Joined: Apr 2006
Posts: 1,677
From: London (UK)
Rep Power: 156
Yes they do he gives you some control box that works in conjunction with the stock ecu so they are controlled in the same way as the vtgs I'm guessing.
Registered User
Joined: Nov 2012
Posts: 487
From: Iowa
Rep Power: 130
Your info is highly appreciated mate, and yes i would like to ask some questions in the next 2 days as i am gona split open both turbos and see if i get get myself temporarily sorted out i hate the car being parked. until i decide what i want to go with best. i want a strong car on pump gas 98 pushing mid 600s to the wheels. so give me your best thought guys and off course on race gas somewhere in the 700s if possible.
If you are ready to move on to wastegates then it opens up to more options.
Registered User
Joined: Apr 2006
Posts: 1,677
From: London (UK)
Rep Power: 156
yeah i guess i would like to get more info from them. as i also seen a thread about some guy that had issues with the install and didnt get proper feedback from SRM. He also stated its not a direct bolt on, he had to modify a couple of stuff for the turbo to take its place right.
If you want to go with a Garrett or alpha turbo then you will need new everything and external boost control.
P.S. The reason i reccomend EFR is I have a 9180 on my r34 gtr which is a 3ltr and for such a large frame turbo the spool is insane and the transient response is amazing so IMO a very versatile turbo. The twin 7163 on a 3.6ltr must amazing!!
Last edited by GTRNICK; Mar 9, 2017 at 03:23 AM.
Registered User
Joined: Oct 2010
Posts: 433
From: Bahrain
Rep Power: 65
Boost controllers are not as bad as you guys make them, actually I like it more than the fixed value of the ecu control ... I have 4 settings for different moods and fuels, when installed and setup properly its the best thing after a full aftermarket ecu ....
Naj I know you, vtg's even modified ones will leave you wanting more, and that 700whp is on racefuel ....
I wanted to keep the oem airbox when I changed my turbos, I passed on the EFR's as they would not work with the do88 style intake (3" vs 2.25" inlets) .... Alphas fit perfectly, and as Sam says half of the work is done for you by TiAL its a straight fit I installed mine at home working alone over a weekend ....
Good luck mate
Naj I know you, vtg's even modified ones will leave you wanting more, and that 700whp is on racefuel ....
I wanted to keep the oem airbox when I changed my turbos, I passed on the EFR's as they would not work with the do88 style intake (3" vs 2.25" inlets) .... Alphas fit perfectly, and as Sam says half of the work is done for you by TiAL its a straight fit I installed mine at home working alone over a weekend ....
Good luck mate
Registered User
Joined: Nov 2012
Posts: 487
From: Iowa
Rep Power: 130
If I ever go that route I would be taking a hard look at those kits.
Best of luck with your decision. In the end you are making the car faster so that's always a good thing lol
