VW MK3 GTI 16v Turbo

[lugnuts]

Car:

Engine:

32-33 psi Dyno:

25-27 psi Dyno:


Wire-in VEMS v3 ECU. External 400 KPA MAP Sensor. Bosch 2x2 Ignition Coil.

Thanks Rob and this Forum for the support!

[rob@vems.co.uk]

Awesome

[lugnuts]

Thanks, just another day at the office.
Here is a new run on my "home dyno", which has a working RPM pickup and more consistent results.

[lugnuts]

Update, 1 year later.

This car now runs E85 fuel, still a street car, Bosch 160# injectors, it makes 680 wheel HP and it has gone 10.42@141 mph in the 1/4 mile.

VEMS is working great, I hope to implement some of the new features to make this car faster and still as reliable.

[GintsK]

Would you describe more detailed about parts, sizes?

[lugnuts]

Sure, here are the specs:

    * ABA / 16v
    * 10:1 compression Wiseco pistons
    * Crower connecting rods
    * Stock 1.8 head w/ valve springs
    * Shrick Camshafts
    * Racecraft Intake and Exhaust Manifolds
    * Precision 6262 .63AR Turbo
    * Bosch 044 fuel pumps
    * Bosch 1680cc fuel injectors
    * E85 Fuel
    * Clutchmasters FX700 Twin Disc Clutch
    * Quaife 6 Speed
    * DSS Stage 5 Axles
    * M+H 25"x8.7"Tires on Exospeed 13" Wheels

- We ran the 10.41 pass on stock camshafts at 43 psi boost
- The 683 whp dyno was with Schrick camshafts at 39 psi
- Here's a dyno chart, one run is 18-22 psi and the 671 run is 38 psi

[GintsK]

Did't 4th cyl suffer from leaner? Intake manifold looks too simplified for so high flow.

[lugnuts]

Do you mean cylinder #1 (by the timing belt?)

Regardless, no, there are no problems with any cylinders.

The E85 is working very well. This car has been too lean, overboosted (46+ psi on 43.5 psi MAP sensor), and still has no damage.

[lugnuts]

Newest engine picture:

[GintsK]

Do you mean cylinder #1 (by the timing belt?)

Regardless, no, there are no problems with any cylinders.

The E85 is working very well. This car has been too lean, overboosted (46+ psi on 43.5 psi MAP sensor), and still has no damage.

Sorry - 1st cylinder, yes!

What is launching strategy?
Crankshaft and bearings are OE?

[Denmark]

evil Golf 

[lugnuts]

thanks! 

The Quaife gearset has a pretty tall first gear. Right now, I'm basically running full boost down the racetrack.
The boost is 10-13 psi on the launch, and grows to 31 psi, the tires spin all of first gear.
On a "good" launch, the rpm will "catch" and drop from 8000+ down to 6500 rpm in the middle of the gear, and then it will be a good 60" time (1.6 to 1.7). The car makes ~36 psi in second gear, and spins a bit at the bottom of 2nd. Then it dead hooks 3rd and 4th as it hits 39+ psi boost.  The 10.41 run was with a 1.77 60' time. this is all unorthodox, with a lower numerically first gear, we can do low 1.6 60' times all day long.

Now that I have founf out about the "Completely Undocumented Boost by Gear and RPM 1.1.47FW and MT", I am going to try staging the boost some more.

[MWfire]

thanks! 

Now that I have founf out about the "Completely Undocumented Boost by Gear and RPM 1.1.47FW and MT", I am going to try staging the boost some more.

In two days i'll write tutorial for that on wiki and forum.

[lugnuts]

Excellent, thanks.

I just had a setback, I found out that my test car has a broken Speed Gear in the transaxle, so i cannot use fromt (driven) wheel speed.

So, I'm back to making the rear wheel speed work. I'm just trying to knock a couple tenths off of this car before the end of the year.

[gunni]

Of course you never use a driven wheel unless you absolutely must like 4wd.