1.8 --> 2.0 Race Stroker. Before and after dyno results!

[CO AVANT]

2003 B6A4 Avant AMB

Mods before the 2.0 build:       
GTRS (ceramic coated hotside)             
Revo BT software                                 
Ecode FMIC                                           
Ecode testpipe  (thermal coated)                                   
NS exhaust                                         
ATP mani (thermal coated)                   
NS TIP                                                   
440cc Bosch greentops                       
Forge 007 DV                                       
AFE air filter, 3.0 snorkel                       
Bosch 3 prong plugs     
AVC-R EBC                     

Mods that I changed to during 2.0 build:
NGK BKR8EIX, Genesis 430cc, APR exhaust, ER Competition FMIC, gasket matching               


Internal Upgraded Mods done on 2.0 Build:
JE forged pistons 82.5mm, 9:0:1 cr, pro rings
Eurospec knife edged forged 2.0L crank
Eurospec forged Rods with 20mm wrist pin
Ferrea exhaust valves, with QEDpower valve job
Cat springs
Cat 3651 Cams
Ported and Polished runners into head on exhaust and intake side
Autotech Cam gear

Ambient Temps in the room on the old GTRS dyno runs were 85deg.  Temps in the room today were 92deg. 5800ft elevation.  0cf Timing pull on all 4 cylinders through the entire pulls today.  BTDC's were in the 16.5 range.  Spool up on both the new and old pull are worse on the dyno rollers than when actually driving by ~300rpms.  Both 3rd gear pulls.  Both old and new pulls were done on +/- 22psi and 104oct unleaded.  I was messing around with boost today on the first couple pulls and actually didn't push what I call "max boost" until the 3rd pull today which ended up being my highest numbers of the day.  I only have 1100 miles on the engine.  I could even up the timing some more.  I'm hoping to reach for ~370whp with the dinky GTRS.  Now I just need to throw on a bigger turbo, fueling, and some custom programming for the stroker.  That'll get me into the power range I want. []

Obviously these #'s would be much higher at sea level as I would be able to push the GTRS by 3psi more or so efficiently.  If I could keep from leaning out too much down there with these injectors and fueling... 









Video/Sound Clip of Dyno
http://www.youtube.com/watch?v=J3rj7TqECgI

[enginerd]

If your making 350 whp on 430's your afrs must be like 16:1.

EGT's must be like 2xxx degrees, i would definitely not run high boost without more injector.

[CO AVANT]

A/F is 12:4 at redline with 104oct race gas.  I have not even driven the car yet with the newly built motor on pump gas.  I do not need as much fuel delivery with race gas.  Lambda is spot on.  EGT's are below 900deg C.  I can get away with running 430cc injectors because I am not running the car at sea level, nor am I making 350whp uncorrected.  The 350whp is using a correction factor for 5800ft and 92deg.  It's around 1.24-1.25 at the dyno I use.  The real uncorrected #'s I'm making are ~280whp and 277wtq.  Since that is the case I am not worried about running too lean up here.  If I were down at sea level I would most likely have to step up in injector size.

[sciroccoR]

you said "race".  where and what type of racing?

[CO AVANT]

I said "race" as in race gas.  104 octane unleaded.  I do mostly Bandimere drag strip and extreme mountain driving.

[bobqzzi]

Nicely done.  Time for the bigger turbo!!

[CO AVANT]

haha, no doubt.  At least I know now just what this build can do on a relatively small choked up turbo.  I will be going with either a full 2871R or 3071R soon.  Will prolly have to jump up in injector size though and tweak them down for the 440 tune I'm rocking.  If I stay within a ~10-15% fuel trim, I should be able to get away with pushing ~500cc out of the 440cc file.  I'm not going to go with anything bigger than a 3071R or 3076R because I just won't spool anything bigger efficiently at 6000ft.  Much less 10000ft when I do my mountain drives...

Thanks for all your help Bob.  This head sounds pissed off now and the cams have really helped my power curve.  Can't wait to see the difference on a bigger setup. 

[kilmer420]

You dyno in 3rd gear?

[CO AVANT]

yeah 3rd gear.  Too bad my motor blew a month or so after this dyno because of shitty machine work done by AMS in Fort Collins CO. 

Here is the thread and the carnage pics...
http://www.audigeeks.com/forums/index.php?topic=2389.0