Its a 2.2L it should be pretty wicked, I'm guessing 3K to 3500 for spool start time... I think a GT30R has ball bearings...

Ah, yes, good question, which I wonder myself also. Actually, I would ideally have wanted the GT3071R for even a little lesser lag, but this one came along..

Kulein: the former IHI VF34 had ball bearings also! Theoretically spool should be (much) later, but in reality I think it will not make that much of a difference. A little later spool is not neccessarily a bad thing! I actually like spool to be a little later so your not on (back)pressure all the time on the highway and overall back pressure (=high EGT) is less.

About 1 bar boost (14.5 psi) at 3800-ish rpm would be excellent for me. Right now I had 1 bar at 3300/3400 rpm in 4th. The old turbo had a nicer (for me personally that is) spool on the 2 liter.
Purely track driving, spool of the VF34 was better on the 2,2 I think. In 3rd coming out of a corner at 3000-3200 rpm, spool came in really nicely an drelatively gentle. That last thing is cam and tune (wastegate ecu control) dependant as well of course.

Waste gate location
 

Hi Walter, please be very careful of the waste gate location. If somethng hit it/bend it, you could over boost.

I think a lot of people use the GT30Rs here for 2.0 - 2.2L engines, with good results, but these aren't Aircooled VW engines, so who knows...

Heat on the outer CV could also be a problem especially when stationary after a power run and its glowing red hot:angry:. You could kill two birds with a heat/impact shield over the waste gate and exhaust side of the turbo.

Clive

Fantastic reading! Great pics,great vids,great car and a great guy! The continuous improvements made to the car over the years is amazing.Keep the news coming Wally! All the best! Hopefully I´ll see you at the track next year!

Mark

Great looking (re) install :D. I would not worry about the closeness of the turbine to the outer CV as I have my turbo installed in the same location with no issues.

My exhaust pipe was actually 19mm away from the inner sidewall of the rear passenger tire and no problems after some hard runs and then sitting. The cooling airflow in that location is a bonus ;)

Looking forward to the upcoming performance reports :cool:

Sandeep

Nice to "see" you here as well Mark :)

Sandeep

Ditto! although I dunno about that 'great guy' :lmao:
CU around Mark! And as a german, the - look should appeal to you :D

:lmao: Thanks guys - it´s good to be here! I was registered here before but I had forgotten my password and my nick aswell:o ....getting old I guess.
It´s good to see that the GT3076 fits in that location.I have a GT3071R which is imho a little smaller in diameter at the compressor housing.Just waiting now for my parts to get back from balancing,then I can finally put the engine together.

New turbo has been started and run for the first time! Whoaha! I like this turbo already :D
This was just on the internal wastegate without WI and without any additional tuning, but already is clear that this 50% more flowing turbo only gave a 100 rpm later spool to make 1 bar boost :cool:
Proof:

http://i174.photobucket.com/albums/w...g.jpg~original

It also holds its boost better and the internal wastegate doesn't creep (yet) as is shown by the steady boost line.
BTW: 200 MAP is 1 bar boost above ambient (=100). The wastegate boost goes on to about 1,15 bar boost (~17 psi).

That is awesome, good job picking a better turbo out for minimal increase in lag!

Even without further tuning that is quite an improvement! My guess is that your intake temps are also lower due to the better effeiciency of this turbo.How much boost do you intend to run?

Intake air temp is also in the graph: ' AIR' Its in Celcius and outside temp was about 12 degrees Celcius. IAT started at 14 Celcius and climbed to 18 Celcius during that WOT run. But I have a slow Bosch sensor and its probably not showing the fast increase accurately.
The info is all there in the log though ;)

EDIT: does everybody 'get' the log? (in what you see?). The log adds data and therefore puts new info at the left in front of what was already there, so you need to watch it in such that the car runs from the right hand side to the left. Boost and INJ% (= IDC) rise when I floor it and throttle gets over 90% (100%=WOT). The x-axis is in seconds (time), so the log part you see here is from about 7 minutes ago after I shut it down back home. /EDIT

Do you also see the IDC (injector duty cycle) climb to over 80% at the end of the run at about 6000 rpm? I am a little (too) rich maybe so a little gain in IDC room can probably be made, but I am running out of injector pretty soon (again...)
I hope to get to 1,35 bar, which is about 20 psi.
But how much boost you can run is not always that decisive on making power: Case in point: I needed to take out a lot of timing with the smaller turbine of the IHI turbo (which choked on my engine I can now probably safely conclude).
Depending how much timing I can bring back (which is dancing with the devil as well), will determine more how much more power I will be able make. I f you can run a fair amount of boost AND you don't have to retard timing a lot, then that says something about the efficiency of the combo. At least, that is my experience so far ;)
I think I am going to make an apppointment with the dyno already :-))

Ahh now I see the air temp - thanks!

That is the reason I was asking.I´m anxious to see how much you can add without detonation.Myth has it,that a larger bore is more prone to detonation.So another myth to be busted! :D Inlet temp plays a key role for that,which also dictates how far you advance your timing and where in your rpm band your max boost will start.
What is the MB (Lambda?) and PM (Timing?) on the vertical line in the graph mean?

Great to see the new turbo is working for you, and thanks for the clarification on how to read the logs.

I've copied the image to my desktop so I can review it in detail and then ask some questions :lmao: What size are your injectors again ? I'm now thinking my 57 LB/hr (599cc/min) are now too small :(

Sandeep

Some of the abbriviations fell away because I put the line exactly in the spot where 1 bar boost has been reached, so you all could see what the sensors read there, especially the rpm, which makes a nice bridge tou your q.:
MB is the remnent of LAMB ;)
and PM the remains of RPM ;);)

so hopefully you now see that 202 (1,02 bar boost) is reached at 3535 RPM :D

Your very welcome to it :)
I now run the 60 or 63 lbs Siemens injectors. Said to be 660 cc/min at 3 bar or 45psi fuelpressure, but I have upped the fuel press. in the meantime to 3,5 bar.

Rolling road dyno is booked for saturday morning early. Little bit too soon, but later wasn't possible or too late for me...
I hope I can get the boost regulation dialed in again on time and tune for it. Will be stressed for time, but very curieus what she will do on the dyno.

BTW If you indeed study the plot closely, you can see that at around 5800-6000 rpm, the lambda gets a little higher for half a second and that the closed-loop immediately corrects this by adding fuel, which makes the IDC go up there at almost that same very instant! The Bosch/Innovate are very quick to react and the DTA closed loop function does too. It all shows in that very spot. I have now added some more lambda filter, so that will smoothen the curve a bit more I hope and relex the closed loop corrections a bit ;-)

I guess I busted that myth too then :D

Result: 350 hp! at 6500 rpm with close to 300 hp at the rear wheels :D:D:D

Torque: max at 420Nm or 310 ft.lbs at 5200 rpm.

I fiddled somewhat with fuel correction and look what I did in the other run, but up top we made some gains (just 10 hp):

Flywheel hp and torque of both runs:
http://i174.photobucket.com/albums/w...24okt09005.jpg

Rear wheel hp:
http://i174.photobucket.com/albums/w...24okt09007.jpg

Video of the run:

http://www.youtube.com/watch?v=nljeNyH07Cs

WAY TO GO!!!!

Chris.

MMMMMMMMMM... I Can't stop drooling.
Do you have extra head studs on your engine for the boost?

sweet

:notworthy:

Great job Wally!! :goodjob:

Way to lay it down Wally. Very nice numbers.

Nope, just good ones (ARP) but it only has 16 psi at 6000-6500, so its not excessive boost that created these hp numbers ;)
And on a 103mm bore, which is said to not even seal in n/a aplications...

And cast alu cylinders, stock VW type4 crank and stock rods.

I count at least another 3 myths busted :D

that ROCKS Wally :)

Chris.

Congrats Wally! Awesome results! It just keeps getting better! Torque just shoots straight up 420NM and only 16psi - fantastic!

I count at least another 3 myths busted :D[/QUOTE]
I wonder what my 2.8 build would put out turbo'ed?Hmmmm.

Good looking numbers! hows the seat of the pants feel between the different turbos, any noticable difference besides lag?

Awesome #'s Wally !

Congratulations on your 350hp aircooled daily driver :D

Sandeep

Funny thing is, there is just 100-150 rpm lag difference! So its hardly felt in real world conditions.

I overlaid the two dyno plots and this turbo is about the same down low, but just keeps pulling more (more torque) from 4500 rpm to 6500 rpm, while the former turbo did not make more power after 6000 rpm.
But I only did two evenings road'tuning' with it, that was it. So there's probably a little more in it I suspect (but not that much) ;)

You got that right Sandeep!! We don't need no stinking watercooled PEEEEEP to make serious powerrrrr :D :lmao:

When you say your car is daily driven are we talking like a 40 mile round trip to work 5 days a week or its just street legal?

I didn't say and never said that its daily driven... its not ;)

Its also not 'just' street legal. It has the (turbo) power on the official vehicles papers! Furthermore I do track days, runs several laps Nurburgring (15 miles for just 1 lap) and drive to all european drag day events on its own wheels and in germany at sustained speeds of well over 100 mph on the autobahn.
So the car has a worse life than when it would be daily driven ;)

I know you never said it was a DD, I just wanted clarification on how driveable it is, off the track, seems its very much so...

Ah, yes, its remarkably drivable: I can drive in 3rd gear 1100-1200 rpm and power on without hesitation.
That's a bit of EFI tuning as well though I must confess ;)

I'm STILL getting together all my EFI bits, and I can't wait to get that kind of driveabillity, my dual kads are the suck... but they were always a stop gap solution until I got the EFI together...

I SO badly want to open the case up do some oil mods, and make the engine bigger...

You're car has always been one of my favorites!

Sweet, 350hp. :goodjob:

Just found again the dynorun with the old turbo at Budel, june 2009.

Small flames out the exhaust at 1:08 :D

http://www.youtube.com/watch?v=T0PDByAqyjM