Golf II GTD with 1.9 AAZ engine --- EVO II

[RabbitJockey]

i just wound the first thread that discussed the quick spool valve because i thought u may be interested and that it it could help with the flat spot in power.  should be interesting.  i may have missed it, have you fixed the leaking head again?

[Alleslowbuged]

Hi,

no it is still leaking, but i do not longer think that the headgasket is the problem, i think it is the soldered crack in the exhaust port of cylinder four. It is leaking, yes, but it is not so bad that i could not drive the car. It is leaking since several month i use the car as daily driver over the hole time, if i drive like a normal dirver is nearly no issue, only when i drive it with high boost and/or really high revs i have to fill up coolant from time to time. When the car is runing there are no signs of water steam at the exhaust, so it is not so much. If i drive the car hard and then park it, wihtout relief the pressure from the coolant system first and than wait a few days, than it will have a certain amount of water in the exhaust, which causes a bad black spot on the tarmarc during start up.

Best Regards

[RabbitJockey]

a problem u can still drive with seems to be how vws break.  its probably cracked in the best place possible for such a crappy thing. 

[Alleslowbuged]

[Alleslowbuged]

Hi,

today the turbo was only good for 1,0 bar (15 psi), and here for all how wants do know what "turbo-lag"  means:

(all data in fourth gear)

0,10 bar   bei  90 km/h  (2350 rpm)
0,20 bar   bei 100 km/h (2600 rpm)
0,50 bar   bei 140 km/h (3600 rpm)
0,75 bar   bei 165 km/h (4300 rpm)
1,00 bar   bei 190 km/h (5050 rpm)

The dyno was not strong enough to allow the turbo to spool up the whole way. But for only 1,0 bar the peak power was quite good in my eyes. To mount the S2B on the AAZ was only a crazy idea at the begining, but now i think it could be worth the try. If the QSV works only 50% as i hope, this should be a real competitive turbo and i will not install any wastegate in my engines again.  

here is a small video from the first dyno run:



dyno plots to follow later

Best Regards
Alleslowbuged

[carrizog60]

how does it drives before turbo spool?
and how did you like the s1 series?

[Alleslowbuged]

Hi,

@ carrizog60
Without boost it drives like a NA engine.
I have liked both smaller Schwitzer turbos a lot, the S2a was good for a bit more peak power and the S100 should be the best daily driver, non vtg turbo for an tuned 1,9 TD i know.

Here now the dyno diagrams:

first run:


Because the shape is a bit weird above 170 km/h, we had make a second run. It does not sound or feel, if the power was decreasing increasing and i also could not feel that during my test runs on the street, so pherhaps there was a little bit wheel spin on the dyno.

second run:


and here as comparison with the older dyno results:





and as numbers:

175 hp bei 5360 rpm @ 1,0 bar
253 Nm bei 4450 rpm @ 1,0 bar

For sure power is less as 190 hp, but for only 1,0 bar boost pressure  iwas really surprised from my small engine with the big turbo. Above 5000 rpm it is nearly the same power as with the smaller turbos and 2,0 bar boost pressure. The dyno results in mind i can imagine that there was 200+ hp during my test run on street with 1,4 bar boost pressure. I am excited as a child to get the QSV and try how it works.

Best Regards Alleslowbuged   

[Alleslowbuged]

Hi again,

some more data to follow. I have get the compressor map from Schwitzer yesterday:



The compressor is capable for full 3,0 bar (43,5 psi) boost pressure and according to my match bot calculation i end up in the area with the best efficiency at peak power.

here are the map with my calculated points, according to the dyno run:


Best Regards
Alleslowbuged

P.S.
here is the link to the match bot calculation:
http://www.turbodriven.com///////performanceturbos/matchbot/index.html#version=1.2&displacement=1.9&CID=115.938&altitude=500&baro=14.502&aat=75&turboconfig=1&compressor=62k80&pt1_rpm=2350&pt1_ve=90&pt1_boost=0.145&pt1_ie=95&pt1_filres=0.08&pt1_ipd=0.2&pt1_mbp=0.5&pt1_ce=65&pt1_te=75&pt1_egt=480&pt1_ter=1.03&pt1_pw=12.77&pt1_bsfc=0.34&pt1_afr=16&pt1_wts=300&pt1_wd=83&pt1_wd2=74&pt1_wrsin=69033&pt2_rpm=2600&pt2_ve=90&pt2_boost=0.29&pt2_ie=92&pt2_filres=0.1&pt2_ipd=0.2&pt2_mbp=1&pt2_ce=70&pt2_te=73&pt2_egt=790&pt2_ter=1.03&pt2_pw=11.31&pt2_bsfc=0.34&pt2_afr=16&pt2_wts=320&pt2_wd=83&pt2_wd2=74&pt2_wrsin=73635&pt3_rpm=3600&pt3_ve=90&pt3_boost=7.25&pt3_ie=92&pt3_filres=0.12&pt3_ipd=0.4&pt3_mbp=1.3&pt3_ce=73&pt3_te=72&pt3_egt=910&pt3_ter=1.39&pt3_pw=1.1&pt3_bsfc=0.35&pt3_afr=16&pt3_wts=340&pt3_wd=83&pt3_wd2=74&pt3_wrsin=78238&pt4_rpm=4300&pt4_ve=88&pt4_boost=10.875&pt4_ie=90&pt4_filres=0.15&pt4_ipd=0.5&pt4_mbp=1.5&pt4_ce=70&pt4_te=73.5&pt4_egt=1100&pt4_ter=1.52&pt4_pw=NaN&pt4_bsfc=0.35&pt4_afr=17&pt4_wts=368&pt4_wd=83&pt4_wd2=74&pt4_wrsin=84681&pt5_rpm=5050&pt5_ve=82&pt5_boost=14.5&pt5_ie=80&pt5_filres=0.18&pt5_ipd=1&pt5_mbp=1.8&pt5_ce=69&pt5_te=74&pt5_egt=1150&pt5_ter=1.7&pt5_pw=0.08&pt5_bsfc=0.37&pt5_afr=18.5&pt5_wts=400&pt5_wd=83&pt5_wd2=74&pt5_wrsin=92044&pt6_rpm=5050&pt6_ve=82&pt6_boost=14.5&pt6_ie=80&pt6_filres=0.18&pt6_ipd=1&pt6_mbp=1.8&pt6_ce=69&pt6_te=74&pt6_egt=1150&pt6_ter=1.7&pt6_pw=0.08&pt6_bsfc=0.37&pt6_afr=18.5&pt6_wts=400&pt6_wd=83&pt6_wd2=74&pt6_wrsin=92044& 

[carrizog60]

too bad for the lag...
looks to be a good turbo for a twin turbo setup!

[Alleslowbuged]

I think lag will be ok with the quick spool valve and than it is nearly a twin turbo setup, but time will tell us.

Best Regards

[RabbitJockey]

I wasn't impressed until I realized this is at only 1bar.  Very impressive and what a fun thread the way you have recorded all this data along the way for comparison.

[Alcaid]

Looks like there would be nothing but benefits from running a smaller turbine housing A/R

A smaller turbo to help spool it up would also work If you are afraid of back pressure, just run it sequential and bypass the small turbo when back pressure rises

Do you have any wheel dimensions on the S2B? Most likely you have a 76/47mm compressor wheel and a 74/58mm turbine wheel. Do you have a .85 or .76 A/R turbine housing?

[carrizog60]

I think lag will be ok with the quick spool valve and than it is nearly a twin turbo setup, but time will tell us.

Best Regards

where can i find more info on quick spool valve?never heard...

[RabbitJockey]

google it! 

it is for using with a split scroll turbine housing on a non split exhaust manifold, the valve cuts off flow to one side of the turbine housing which cuts the a/r of the housing in half making for faster spool up, then as boost comes on and more flow is needed the valve opens and doubles the a/r making for more flow on the exhaust side.

[RabbitJockey]

here is a good thread

http://www.gtrpwr.com/showthread.php?t=1665