Ball bearing conversion for stock turbo?
Originally Posted by chuntington101
On the boost thing, a Ti turbo with a GOOD bb conversion will run at 2.4 bar no problems in the midrange.
It is interesting, but asinine that it is a debate... there can be no clear cut winner as we all seem to have different priorities... Mine are between here and work 1st, and play later.
Originally Posted by Zeus
It is interesting, but asinine that it is a debate... there can be no clear cut winner as we all seem to have different priorities... Mine are between here and work 1st, and play later.
I did finally start playing with the new Turbo (the titanium one) and the manifold/o2 housing to make sure everything lined up and matched, I know, why wouldn't it, but I've seen stranger things..
Now, here's my dilemma. Do I just put the whole thing in? Or hold onto it a bit and try to solicit a BB conversion from a reputable builder? Or, is anyone here a builder and can do it for me (preferrably in the Northeast USA)
I took some pics of the whole setup the other day laid out.. Wow, looks real nice, certainly not very stealthy, however it does honor the "spirit" of the stock component rules since it is a Stock turbo found on a stock Evo..

Sadly, I'm still waiting on a few little items, coolant and oil lines, Cam gears, head studs, custom upper intercooler pipe for my MAF conversion, I'm still debating on doing a head upgrade now, or waiting.. but the one thing holding me up is I'm waiting on TurboXS to release their upgraded firmware for the UTEC so I can take advantage of these new goodies..
Turbo Conversion
Give me a few days... I've opened up a dialog with one of the noted companies doing the conversion abroad. I'll let you know when I get some details. Who knows, possible group buy
How much might this mod cost?
I am looking into having our IHI turbo supplier look into this as well. I know he can perform this mod while having the turbos rebalanced @ a higher speed as well. I dont know how well the stock turbos are balanced, along with the speed that they are balanced at as well.
anyone know this?
I am looking into having our IHI turbo supplier look into this as well. I know he can perform this mod while having the turbos rebalanced @ a higher speed as well. I dont know how well the stock turbos are balanced, along with the speed that they are balanced at as well.
anyone know this?
This is my setup currently as it sits.. I'm waiting on coolant and oil plumbing so I don't have to recycle my stock parts (I want everything to be clean and free of debris) Plus I'm detailing the components to show the car and possibly a magazine feature if I can somehow sell my soul..
This is the JDM Evo VII RS Titanium 9.8 nozzle turbo with a DNP O2 housing and JIC exhaust header.. What I'd like to do is have this turbo converted to ballbearing, have some minor porting and blending done and other minor mods to make it flow a little better, but use the titanium components that this turbo contains.
The total cost for the components so far is $1300, in order to be a worthwhile conversion this entire setup including BB conversion should cost under $2000, that would place it well below the price of the most inexpensive turbo kits.
This is not yet converted to BB.. thats what i'm hoping to do before I have to install everything to show the car.
This is the JDM Evo VII RS Titanium 9.8 nozzle turbo with a DNP O2 housing and JIC exhaust header.. What I'd like to do is have this turbo converted to ballbearing, have some minor porting and blending done and other minor mods to make it flow a little better, but use the titanium components that this turbo contains.
The total cost for the components so far is $1300, in order to be a worthwhile conversion this entire setup including BB conversion should cost under $2000, that would place it well below the price of the most inexpensive turbo kits.
This is not yet converted to BB.. thats what i'm hoping to do before I have to install everything to show the car.
Originally Posted by WOT
Very nice!
Does the DNP O2 housing a direct replacement of the factory piece or do you need a DNP downpipe?
Does the DNP O2 housing a direct replacement of the factory piece or do you need a DNP downpipe?
Evoate already answered.. Its a bolt-on swap.. works with any aftermarket or stock downpipe that bolts to the stock O2 housing.. its really nicely made and uses a super thick flange.
If you're looking for an answer like "Yes, you will see a solid 5HP gain.", you won't get it.
Improving the engine's ability to breathe increases knock resistance and the turbocharger's ability to spool more effectively. Will it give power? Not directly, but the whole package of giving the car better breathing will, and a tubular 02 is part of that equation.
Improving the engine's ability to breathe increases knock resistance and the turbocharger's ability to spool more effectively. Will it give power? Not directly, but the whole package of giving the car better breathing will, and a tubular 02 is part of that equation.
Wow.. great answer thats exactly what I was going to say.. Overall it doesn't offer much except lowered restriction.. As you can see I chose all of the components I'm using specifically to lower the restrictions in the exhaust system and intake. Its hard to put a tangeble value on "how much HP is gained" since I honestly don't know, but I'm looking for specific characteristics that are more important than a large HP gain.. Specifically
1) Less restriction
2) Durability
3) Servicability
Notice that HP isn't anywhere on my list.. Although we know this will gain a bit, likely the gains could be significant, my primary concern was being able to service the vehicle with available parts should an emergency arise.. There's no question that if something happened to an aftermarket turbo or its components, you would likely have a hell of a time finding components to fix a problem quickly .
Now, regardless of the BB conversion (since I have not had it done yet) I can be certain that I'll make more horsepower, but more importantly, Horsepower and Torque in the area where most of my driving is, and a more drivable setup if I do any circuit racing. I should gain a wide-flat torque curve due to the lowered mass in the cartridge, that means earlier spool, and lowered overall restriction and mass up top so the turbo can run more efficiently at the boost pressures I intend to run.. More efficiency means less backpressure caused by the turbo, which in turn indirectly results in a bit more free power.
All I have been focusing on, with my intercooler upgrade, throttle body, MAF upgrade, Intake manifold, ported head, etc.. are to reduce the restrictions in the system.. which will have a big effect on a stock sized turbo's ability to produce good power while remaining drivable and also better efficiency also means more fuel efficient.
1) Less restriction
2) Durability
3) Servicability
Notice that HP isn't anywhere on my list.. Although we know this will gain a bit, likely the gains could be significant, my primary concern was being able to service the vehicle with available parts should an emergency arise.. There's no question that if something happened to an aftermarket turbo or its components, you would likely have a hell of a time finding components to fix a problem quickly .
Now, regardless of the BB conversion (since I have not had it done yet) I can be certain that I'll make more horsepower, but more importantly, Horsepower and Torque in the area where most of my driving is, and a more drivable setup if I do any circuit racing. I should gain a wide-flat torque curve due to the lowered mass in the cartridge, that means earlier spool, and lowered overall restriction and mass up top so the turbo can run more efficiently at the boost pressures I intend to run.. More efficiency means less backpressure caused by the turbo, which in turn indirectly results in a bit more free power.
All I have been focusing on, with my intercooler upgrade, throttle body, MAF upgrade, Intake manifold, ported head, etc.. are to reduce the restrictions in the system.. which will have a big effect on a stock sized turbo's ability to produce good power while remaining drivable and also better efficiency also means more fuel efficient.
Its a great Idea andn you will see an improvement, but If I am spending NORTH of $1000 for a turbo, its gona be a 50Trim, and these new ones spool ALMOST as fast as stock, like 3500 or so, and oh yeah 500WHP too....
Actually, I paid $490 for the turbo.. the other components I had gotten a few months back to upgrade the stock turbo.. You do have a point, but 3500 compared to 2700rpm is a pretty significant difference when your dealing with daily driving..
I'll let you all know how it goes though.
I'll let you all know how it goes though.



