Best street turbo ever?

[jckrieger]

Ok, so I finally got my Enforcer 3 turbo rebuilt and the CSX put together last night. The turbo has a 50 trim TO4E compressor wheel in the stock housing and a stage 3 .48 turbine side. I'm only looking for 300-350hp at best, so I figured I'd try the .48 turbine to see how it'd work. Well, I noticed the car starts building boost at 2000RPM at part throttle (about 5psi) and reaches max boost (10psi) by 3K rpm (grainger is turned all the way out). Has anyone else used a stage 3 .48 turbine housing before? This turbo is unbelievable!

Now, to build the 60 trim TO4E Stage 3 .63 turbo for the hybrid motor....

[86Shelby]

That should spool like no other with the .48 housing on it! I suppose it would be very nice for the street. My hybrid spools about the same on the R/T with the .63 housing(20 psi), great for street driving!

[jckrieger]

I never imagined a hybrid turbo could spool like this. I was told the turbo would be laggy with the stock intercooler, but heck, that's not the case at all. I can't wait to crank up the boost and see how this thing performs. Now, if only the weather would cooperate...

[Dave]

Ok, so I finally got my Enforcer 3 turbo rebuilt and the CSX put together last night. The turbo has a 50 trim TO4E compressor wheel in the stock housing and a stage 3 .48 turbine side. I'm only looking for 300-350hp at best, so I figured I'd try the .48 turbine to see how it'd work. Well, I noticed the car starts building boost at 2000RPM at part throttle (about 5psi) and reaches max boost (10psi) by 3K rpm (grainger is turned all the way out). Has anyone else used a stage 3 .48 turbine housing before? This turbo is unbelievable!

Now, to build the 60 trim TO4E Stage 3 .63 turbo for the hybrid motor....

That's incredible. Spools as quickly as a freaking mitsu.

[inmyshadow]

Man, I thought my quick spool optioned stock TII turbo was a handful with it building peak(20lbs) at 3000RPM.

later

[BadAssPerformance]

I told ya that .48 stage 3 worked well

[The S is Silent]

That sounds bad----. What other mods are done? Any port work done on the head and exhaust manifold? 2.2 or 2.5?

[Frank]

This is on a 60trim? You sure you dont have surging because it spools to fast? I would say you do have turbo surge?!


Frank

[The S is Silent]

This is on a 60trim? You sure you dont have surging because it spools to fast? I would say you do have turbo surge?!


Frank

50 trim. The 60trim is going on his hybrid motor.

[cordes]

That is pretty quick indeed. It will probably be too quick when you really start laying down the power though.

[turbovanman²]

2.2 or a 2.5?


How does it pull to redline? I wonder when you turn the boost up, it will be like hitting a brick wall? if not, we all learned something new.

[cordes]

2.2 or a 2.5?


How does it pull to redline? I wonder when you turn the boost up, it will be like hitting a brick wall? if not, we all learned something new.

No kidding, I would have thought that it would have surged like nobodies buisiness. I will wait until he has the boost at about 18-20 PSI before I start looking for a .48 housing though.

[jckrieger]

This turbo is on a 2.2L T2 bottom end with an 84 G head that I cleaned up a little with a die grinder in the bowl areas. The intake manifold is a stock 2 piece intake and the exhaust manifold is a unit I ported slightly. Exhaust tubing is crush bent 2.5'' out the back with a hollow Flowmaster muffler.

As far as surge goes, I haven't heard anything yet, but it could be a problem... I'll put a boost gage at the intercooler inlet for testing. I remember looking at the boost gage setup at the turbo outlet on my CSXT when it was running 20psi... man would that needle flutter when I let off the throttle! When it comes to cranking things up, well, I can't get the car rolling without wheelspin it's so cold, so we'll see how things work at higher power levels when the pavement warms up a little. Right now the car looks 100% stock, so I can't wait to see what kind of numbers I can put down before going to a larger intercooler.

[Ondonti]

Having a turbo that spools early must be fun. I wouldnt know anything about that.

[jckrieger]

I took the car out again tonight over to a friend's house to make sure all the funky smells went away (had anti-seize on the turbine and grease on the downpipe). I can't get boost readings in 1st gear because the tires spin before I start building boost. In 2nd gear, rolling into the throttle I get 5psi by around 2100 and 10psi around 2800, which is the point where the tires start spinning. I can't imagine what this turbo would be like if I could spool it up in 1st and just lay into 2nd gear. 3rd and 4th gear response is excellent, and even 5th is reasonable (can still get boost at 2K). I never thought a 2.2L G headed car could feel like this.

[FrankTheTank843]

a new kind of monster

[8valves]

Sounds like a great thing for a lower boost intended street brauler. I think you'll run into some issues at higher boost levels though because of backpressure in the manifold from the .48

Let us know how it works though, which may be a while till you can get the tires to hold, and a better intercooler to support it!

Aaron Miller

[jckrieger]

If all goes well, I should be able to setup a dual stock intercooler or a GN intercooler in the car for some testing. I'd really like to go to the track with the stock intercooler in the car and make some runs at 14psi. With the stock head and turbo, the car ran 14.56 @95mph at 14psi, so I'd like to know how a ported G head and a larger turbo with no other changes affects performance. Even with excessive pressure drop in the intercooler, the larger turbo should help keep compressor efficiency in check with the larger pressure drop... as long as I don't run into surge anyway. As far as the turbine goes, we'll have to see how it works out. I wish there was some good information on turbine backpressure vs A/R, turbine wheel geometry and turbine speed.

[John B]

Hmmm! I've always wondered why the stage one wheel wasn't more of a restriction than a 2.5" SV. I should have also wondered why it wasn't more restriction than a .48 AR housing! Conventional wisdom has it that you can't make decent power with the .48 but what if the wheel is the greater restriction?? Hmmm. Hmmm again...

[Ondonti]

at some point the .48 is going to create diminishing returns, but for the purpose it was bought its probably great.