This thread is copied over from the N/A forums, as i know a lot of people don't explore elsewhere on the 'tex. Car is NOT mine, it's my housemate's (vwjunkie42)
2 years ago he decided to ITB and Megasquirt his super high mileage 16V. Did lots of research, trial and error, tuning and re-tuning on Speed Density before finally going to Alpha-N.
Dynoed last fall before tearing it apart to get a number before we tore it all down and built a new motor.
Old motor specs were:
9A block with tons of miles
9A head some minor (and sloppy) port work
Euro Intake cam
1.8T injectors (blacktop)
MSnS V3MS2 2.01 code.
28* timing WOT
This setup made 144whp 131wtq peaking @ 6200RPM
New motor specs:
2L 9A Block
.040 Wiseco 11:1 pistons
SCCH intermediate shaft
Autotech lightweight intermediate gear
MLS 9A headgasket (stock)
Ported 1.8L PL Head
Supertech +.5mm Intake valves backcut to 6.5mm
Supertech +.5mm Exhaust valves
Tapered TT guides
Basic 3-angle valve job
Supertech valve springs
Supertech Ti retainers
German OE lightweight mk4 TDI lifters
TT 288 cams
Autotech adj. cam gear @ 3* retarded
GSXR1000 TB's w/ 3" Velocity of Sound trumpets
I got the car running well enough to get 1500 miles of break in on it with it tuned to about 4K RPM.
Made the trek to New England Dyno for an hour tuning session with it strapped on the rollers. This motor makes so much noise at anything over 50% throttle it was just not feasible to tune WOT on the street. It doesn't help that with it's tune now after our dyno session, it'll hit 67mph in 2nd gear ( ).
First pull on the rollers was a 50% throttle. It made the same power @ 1/2 throttle as the old motor.
After about an hours worth of tuning we ended up with:
195whp & 146wtq
I tried my best to weasel out another 5 ponies but it just wasn't happening, it's there, I just couldn't get it out in the time we had. Peak power comes in around 8000 RPM. Injectors are running @ 106% Duty cycle (per the datalog) at the 8200 RPM rev-limiter.
All tuning was done by myself, untrained and amateur at best. The AFR's on his old motor were spot-on and it was tuned 100% on the street. With this motor being strung so high, it's difficult with the fuel table resolution and the time we had last night to get the AFR's perfect. And if you ask me, it bugs the hell out of me. Nick's happy, and it's his car so it's all that matters. Plan now is to get it over the 200 wheel mark...and it WILL happen....
If interested, his full build thread can be found Here
Special thanks to Steve Dutcher who did all the machine work, and also to Steve and John at New England Dyno.
The "haze" in the ports that you see it the fuel....this was taken at 7000+ RPM
These video's really do the noises this motor makes any justice. You need to hear it first hand to fully appreciate it.
Watch the second gauge in on the bottom row, that's the injector duty cycle gauge.....when it hits red, it's over 100%.
Modified by secondgen at 1:38 PM 6-10-2009