Ok after reading every page, i have one question. All my others have been answered.

The $1260 no core option....Does that one come with the 10.5 hotside? Ive got an '03 with the 9.8, and im debating on sending that one in or buying an entirely new 16/20g hybrid. I dont care for the ti wheel and shaft. Id just like to have the 10.5 housing.

 

nyredevo,

Those numbers are on race gas. I think they can be reproduced on pump gas, but you'd have to use our alcohol injection kit to do it.

evildylan,

The 10.5 hotside will only come with the ti/al wheel. The price of $1260 is a new turbo with no core, standard upgraded EVO turbo. That means no 10.5 or ti/al.

midwest monster,
You asked approximate HP levels on pump gas and race with our Stg 4 and but no cams.

Stg 4 is going to give you nothing for HP over Stg 3. The Stg 4 kit is the extra fuel you need to keep the car together at high boost or with a larger turbo.

I have some numbers that will get close. Last week we tested out Stage 2, plus the FMIC from Stg 3 on 94 octane. You can expect 330 whp and 330 ft lbs with that package and our flash. The fuel pump wasn't on the car for those runs although it is in need of it.

We then added the alky kit (about the same as race gas) and did a re-tune, this brought that same package up to 345 whp and 360 ft lbs of torque.

This should easily put the car into the 11's with a good driver.

David Buschur
www.buschurracing.com

 

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"Yeah, I just talked to David last night and he told me that when the turbos are ready to ship, he's going to cross reference this thread and anyone that requested an update or bumped the post for no apparent reason would not receive a 20G. Ever."

HAHA, that's a good one, I didn't say it though

David Buschur
www.buschurracing.com

 

I have news.

I had handed to me today a very nice CNC'd wheel. The wheel has been overnighted to be machined and installed in a turbo.

IF all goes well I will have a completed turbo in my hands on Friday.

Downside to this is, this wheel from the drawing, came out a little bit bigger than was intended. I am actually excited about it as we can try it and see what happens. From here it is very easy to make smaller or just machine a new one. Everything else appears to be what it should be.

I am excited guys (not sexually). This particular wheel, if it works has the potential to make HUGE power, I am talking, HUGE power. Not 450 whp, but HUGE power. The limiting factor is going to be the turbine wheel and that would be a very easy fix. What I am not wanting is a laggy piece of crap. I will trade some big power numbers for a very snappy 450 whp capable turbo. I may be able to offer two different versions though.

As I said, very excited. This particular wheel will absolutely NOT be able to be run on the stock injectors.

I hit 407 whp on the stock turbo this afternoon on 94 octane and still a very safe tune, this was a long spike in the power induced by wheelspin on the dyno, the power settled at a nice flat 378 whp. The head and shortblock are untouched stock. The poor RS has 298 dyno pulls on it now. I have to do some tuning tomorrow as my last change moved the AFR's around. The promising part of this is with 378 whp on 94 octane the car is going to go at or over 400 whp on alky or race gas. With this turbo upgrade it is going to be nuts.

I am trying to get the absolute maximum out of the stock components on this car, I want the car stock appearing and just screaming.

David Buschur
www.buschurracing.com

 

Are you using the stock manifold for this turbo, and could be achieve those numbers with it? I assume this would be the cheapest turbo upgrade if you just change the turbo. You recommend having stage 3 or 4 to run this turbo but what other stuff do we need to modify or add to make this turbo fit? This thread was so long I forgot if someone had already answered this. Thanks

 

David,


Was this setup with the Ported intake and throtlebody ? Please tell us what exactly was on the RS when you got the 378 hp with 94 pump gas.

Because I know that you were gonna try out the intake and TB.

Derek

 

Can the hot side be ceramic coated as well as the o2 and mani? Maybe coat first and then machine to fit the new wheel w/o clearance issues? Sorry, a little off topic, I want to start working on my cores.

 

Yes, you can ceramic coat the hot side, I was planning on doing it.. As far as I know, there are no mods done to the turbine wheel at this time so there should be little if any changes made to that portion. I did read earlier in the thread that there may be some porting that they do to the hot-side that you might want to get confirmation on. But thats also why I'm sending everything in one box over to buschur so everything is coated, ported (as necessary), matched, etc.. Including my Cylinder head.

 

I HAVE A 20G TURBO ON ITS WAY HERE UPS RED LABEL FOR MONDAY MORNING GUYS!!!!

I sent the wheel in yesterday and they have the turbo done. First thing Monday when it gets here it will go on for tesing. I am going to have to upgrade the injectors too while I am at it.

I am really expecting great things. I don't see any trouble making well over 400 whp if it works the way it should and that is ON pump gas.

For those of you not following our dyno thread on here go check it out as we made 382.4 whp and 368 ft lbs today on straight 94 octane.

David Buschur
www.buschurracing.com

 

That has me laughing my butt off!!

The more I think about the WHP I am getting out of this car on 94 octane the more impressed I am with the entire car. Aren't EVO's freaking great?!

Something I need to point out is I don't think any of this can be just bolted onto a car and just ran expecting to repeat these identical numbers. Do I think you can get damn close? Sure. I am saving every single one of these maps in the AEM for future use in customer cars. At this point I don't think there are many other things out there that will repeat the power the car is putting out other than the EMS.

I am absolutely pushing the limits of what the stock turbo is capable of. Not the stock head/engine but the stock turbo. I don't feel by saying that I am pushing the limits of it that I am pushing it unsafely with the tune but just the parts themselves and what they are capable of making. My knock voltage still is not over 1.7 volts in the highest point anywhere on the datalog, this is exceptional. The knock control is set up vary aggressively.

382 whp/368 ft lbs, 94 octane, stock clipped turbo, stock head and stock shortblock. Stock rod bolts, stock head bolts and gasket, stock valve springs and retainers. Not a drop of water pushed over 300 dyno runs in 3rd gear up to the revlimiter of 7500 each pass. It's a beautiful thing.

When this turbo shows up on Monday, if things go as I am hoping 400 whp should be an absolute breeze to hit. I never thought I would get this close with what the car has. Let me put some race gas in this RS or alky and you will see the stock turbo eclipse the 400 whp mark with no problem

Hell, what is the stock turbo record anyway? Might have to chase it down and see what I can get before swapping turbos out on Monday.

I hate to put any race gas in this car, I don't want there to ever be any question of whether or not I used it to get any gains.

This new turbo should make a nice flat boost curve instead of the horrible spiking I have been dealing with in this particular EVO. A steady 20 psi will make for one very nice dyno sheet. I would guess a small loss of torque will be noticed if there is not spike at all though. We'll have to see.

Have a great weekend guys. Cross your fingers the testing on Monday goes well.

David Buschur
www.buschurracing.com

 

HOLY CRAP u have one YES YES YES YES let us know

 

Hey Dave,

Using a manual boost controler I was getting the same spike and fall off to 18 psi you are experiancing. I then set up the AEM EMS with a GM boost control solenoid and was able to get ride of the spike. I now run 20 psi rock steady up to 6000 RPM where it then tappers off to 18 psi because the turbo can't keep up. As fast as the 20G setup you are going with will spool you may end up with the same spike problem as with the stock compressor.... have you thought of using the EMS to control your boost?

Later,

Keith

PS: I don't think I have any record, but I hit 375 on pump gas and 411 on race gas before I ran out of tuning time on a Dynapack AWD dyno.

 

I have considered using the AEM for boost control but have not got around to it. Couple things in the AEM I haven't got around to actually.

As you said though, you hit 20 psi and then fell off to 18, basically what is happening to me but I have to wing the turbo even harder to get it to stay anywhere near that at redline. I think in my case the car is just out of turbo.

The Dynapack dyno is very close if not identical to the numbers you will see on a dynojet from what I have seen customers report. Those are really good numbers. What did the dyno sheet from the 411 look like? I'd like to see it if you don't mind sharing it as I have got as high as 407 or something already but just at the top of boost spike/wheel spin.

BTW, I did try an HKS EVC EZ on the car thinking that a better more sophisticated boost controller would help with the spike, it was the same outcome though.

David Buschur
www.buschurracing.com

 

Dave, are you planning on doing any testing with a 10.5 cm^2 turbine housing with the stock turbo?

 

Hey Dave,

Here is the dyno sheet from that run. I was able to dial in the boost control on the AEM EMS that day, but I didn't get a chance to play with the timing at all.... that sheet is with the same timing map as the AEM came with from you when you set me up for pump gas! I think I could have made substantial gains with a bit more dyno time. I have your stage 4 setup on the car with the 272 cams, adjustable cam gears, SSAutochrome header and SSAutochrome O2 housing.

Later,

Keith

Edit: Link to large pic https://www.evolutionm.net/forums/at...chmentid=48352