I think youll like the pump power of that 3071 David. Ive had one on my car for some time

 

Good job Dave!

Anyway, I had a question.

Did you ever consider the 18G? I rember that being a pretty good option for DSM's back in the day. I never heard anyone talk about it for a Evo. Any opnions on that guy?

 

So downpipes with a donut gasket wont be able to work,like my perrin?

Ive always like the GT3071, seems like a good all around upgrade with alot of room and pretty good spool.

 

Clipped Wheel Turbos - Wooohoooo

 

Not sure what your current downpipe is, if it uses a flat flange and does NOT use the factory donut gasket then it should bolt to our turbo kits. Even with a donut gasket style downpipe you could probably just eliminate the donut and bolt one up, probably would work, but won't gaurantee it.

Honesty, the 18G for the DSM's in my opinion was a flop. It never really did anything, as a matter of fact a highly tuned 16g I think would beat an 18g hands down. I never liked those turbos.

Alright, so check this out. Today the turbo got pulled off the RS. HOLY CRAP! I have never seen a failure this severe. The turbine wheel actually exploded. There are pieces of it embedded IN the turbine housing. This was a ti/al wheel that has been run HARD for quite awhile. The shaft speeds of this turbo were retarded, 30+ psi is where I have been running the boost on the stock turbo. This high boost actuator I am running works very good.

So, I didn't get a chance to run the stock turbo, clipped and ported on race gas at the track. This sucks as I had high hopes. I could go back and change again but I don't know if I will.

We bolted on the real-deal 20G turbo. Got it on right before closing time. Quick check for leaks and I was gone. It's only about 5 miles from work to my house. I am easy out of town in 4th gear and I push the gas, notice out of the corner of my eye that at 2,000 rpm I have about 5 psi of boost. I'm in a 35 mph zone so I let off and just cruise. I hit the outside of town where the speed limit changes and accelerate. Nice. I glance at the boost gauge and see 25 psi. (the car has 118 octane in it Hmm, I think, that's odd. The old turbo was spiking as high as 28-30 when I drove like this. So I just cruise a little further, hit a clear spot, slow down and drop it into 3rd from about 2,000-2,500 rpm. Mash the throttle and watch the boost. Boost hits 26 psi and sits there, may have dropped to 25 psi, but very little if any drop. Well, O.K. at this point I am thinking 100 thoughts.

I turn onto the small country road I live on and remember the horrible compressor surge from the other "21G's". I try to get it to surge at part throttle and can't. I then ease into it, hard, in 3rd and as it spools up, maybe around 4500 I hear a slight surge. The GT30's and GT35's do this same thing. Honestly it is very moderate and liveable, no complaint.

I get to where my property starts and stop in the road. It just so happens the frontage of my property is just over a 1/4 mile I get the car rolling in 1st gear and hit it about 2500 rpm. The car PULLS, I am fixed on the boost gauge, it sits at 25 psi, shift to 2nd at 7500 and it sits at 25 psi, I shift to 3rd at 7500 and it is still sitting on 25 psi. I run the car out to about 7800 in 3rd gear and hammer the brakes to turn into my driveway. From what I could see on the gauge it held between 25-26 psi through three gears all the way to 7500 rpm. I AM FREAKING AMAZED

 

Sorry, I got so freaking amazed I hit the enter key! haha

I wasn't honestly expecting to see the boost hold like this. It is really amazing that it is to be honest.

My car is about as built as you can get an EVO. I have just been sticking with the stock turbo, everything else around it is ready for 700 whp with just a turbo change, fuel pump and set of large injectors.

I am going to pull the actual datalog out of the EMS tomorrow morning as I still don't believe the boost is that flat. If it is we have a winner.

Tomorrow we are running the black car we have posted pictures of at the track. I wanted to concentrate on only that car but with this turbo swap I am going to have to take the RS out and see what it will do. This boost pressure is crazy.

I am use to seeing 30 psi of boost peak and by redline, even with the high boost actuator I am running, it will drop off to low 20's. This turbo has no drop in boost on my car and that says alot.

Very interesting, very. Maybe after all this work and messing with this turbo we finally have one that is going to kick some butt.

The turbo doesn't hit as hard as the stock one. A stock turbo on my car is like a light switch, this one seems more linear, but not laggy. Hard to descibe.

I will try and post an actual datalog of a run with it tomorrow. I don't know if you guys can view an EMS datalog without the EMS hardware. I might be able to print the log, scan it and post it. This will show boost, RPM and I will also show off the air intake temps with our new FMIC on the car.

Thanks for reading, hope I haven't bored you guys! I am excited.

David Buschur
www.buschurracing.com

 

That is great news DB! I can't wait to hear about your track results!

 

That is freakin hilarious! I was reading the first post and was like wtf, that's the end of the story?

This sounds really promising.
I will be looking for something bigger in the future and I just don't know if I want to go big 600whp GT35r or something smaller that is more streetable and still runs a respectable time. With the bottom end and head all ready to go I can pretty much bolt anything on and not have to worry about the engine handling it. Plus with the head ported, etc it should push anything well. Right now even with the stock turbo and an "off" tune in the ECU the car is a bear, even in this heat.

Of course I realize that I am going to have to get meth inj. to ever turn the boost up. Race gas is just not worth the price and trouble in obtaining.

 

I like the point that your brought up about using the larger evo IX turbo... Im intrested to know what kind of components will be need to run that turbo.. or will it be an exact bolt on. Is it also possible the rs Ti version will be pretty hard to beat? There is alot of work being done on modifying current 16gs.. but this turbo is about to become obsolete with the new design

 

My biggest regret to this is going to be not getting a time out of the stock turbo that was on the car. I do NOT want to be in the situation the other turbo that has been released has been put in.

The testing has to be done properly and equally for people to be happy.

The best idea would be to put pump gas back in the EVO with this 20G on it and test it like that as I have a ton of runs with the stock turbo on pump gas in my RS. That would be a fair comparison. I have had nothing but 118 in the tank of the car since we got back from the C&D Shootout, I have been waiting to run the car and see what it can do.

I took it out about a week ago and ran 11.8 at 116 mph on race gas but something didn't feel right. I got back and found one ripped i/c coupling. That night I heard a high pitched squeel, next day I did more searching and found another leak. Then a few days ago the turbo exploded. I just didn't get to run the car on a good clean trouble free pass with race gas in it. On straight 94 octane it has run as fast as 11.7 at 116 mph with Kevin in the car. With me driving it the best I have run is 11.9 at 115 or 116 mph. These new tires are kicking some butt and definetely improved the 60' times, so a little quicker could be expected now. My brother had a 1.62 sixty foot in the car last week and was spinning so hard he lifted, this killed the ET and he only ran 11.8 at 116.

Anyway, I don't know what I would have to see out of this turbo to be impressed on race gas. I am not the driver Curt Brown is by any means. He ran 124 mph on the stock turbo. In my old Talon I ran 127 mph on a 20G after years and years of tuning and trying.

I believe with a good driver in my RS on the stock turbo and race gas it would have been in the 120+mph range. That is why I don't know what I should expect from this 20G.

I guess the only solution is run it on race gas, see what it does, post the results and then put some pump gas back in and see how it will compare. That stock turbo is hard to beat on pump gas, that's a fact!

David Buschur
www.buschurracing.com

 

I'm very glad that your hard work with the new turbo is paying off....

MachC5

 

Dave-

This is the "clipped" reverse scroll 20g wheel you're talking about - correct

And yes, please post up data on pump gas results...

Here's some info on the advantages of clipping (I'd like to get your input aswell interjecting where you can - Thanks in advance...

"Another common method of equalizing turbo lag, is to have the turbine wheel "clipped", or to reduce the surface area of the turbine wheel's rotating blades. By clipping a minute portion off of the tip of each blade of the turbine wheel, less restriction is imposed upon the escaping exhaust gases. This imparts less impedance onto the flow of exhaust gasses at low rpm, allowing the vehicle to retain more of its low-end torque, but also pushes the effective boost rpm to a slightly higher level. The amount a turbine wheel is and can be clipped is highly application-specific. Turbine clipping is measured and specified in degrees." Taken from http://en.wikipedia.org/wiki/Turbocharger

 

Let Dynoflash customer (me)go with stock turbo on dyno, then switch to 20G on pump gas and see results.I think a lot of people want this type of turbo to run good on pump gas and also race gas.Not just race gas cause most of the driving will be on the street.
Thanks

 

Dave,

Heck post the AEM log. I want to see this log . If it holds 25 psi to redline i am buying one .

 

This sounds very promising. Let us know how it turns out. Good job!!