.::|Active Autowerkes Stage "TrippinBimmer" 330i ZHP Supercharged Street/Show Car|::. by WALKD U

3 minute(s) of a 146 minute read

Food for Thoughts...

Final Compression Ratio on a 10:1 C/R Boosted Car (Stock m54b30)

Compression Ratio 10:1 with 4lbs of boost will yield a Final C/R of 12.7:1

Compression Ratio 10:1 with 6lbs of boost will yield a Final C/R of 14.1:1

Compression Ratio 10:1 with 8lbs of boost will yield a Final C/R of 15.4:1

Compression Ratio 10:1 with 10lbs of boost will yield a Final C/R of 16.8:1

Compression Ratio 10:1 with 12lbs of boost will yield a Final C/R of 18.2:1

Compression Ratio 10:1 with 14lbs of boost will yield a Final C/R of 19.5:1

Compression Ratio 10:1 with 16lbs of boost will yield a Final C/R of 20.9:1

Compression Ratio 10:1 with 18lbs of boost will yield a Final C/R of 22.2:1

These are the Final Compression Ratios on a car with 10:1 C/R while under its full boost.

Final Compression Ratio on a 9:1 C/R Boosted Car (Built Boosted m54b30)

Compression Ratio 9:1 with 4lbs of boost will yield a Final C/R of 11.4:1

Compression Ratio 9:1 with 6lbs of boost will yield a Final C/R of 12.7:1

Compression Ratio 9:1 with 8lbs of boost will yield a Final C/R of 13.9:1

Compression Ratio 9:1 with 10lbs of boost will yield a Final C/R of 15.1:1

Compression Ratio 9:1 with 12lbs of boost will yield a Final C/R of 16.3:1

Compression Ratio 9:1 with 14lbs of boost will yield a Final C/R of 17.6:1

Compression Ratio 9:1 with 16lbs of boost will yield a Final C/R of 18.8:1

Compression Ratio 9:1 with 18lbs of boost will yield a Final C/R of 20.0:1

These are the Final Compression Ratios on a car with 9:1 C/R while under its full boost.

Thanks to Supercharging Performance Handbook for the info.

2-18-2013

You are asking a legitimate question. So no worries, I never plan this install to be this long. Over a Year  One issue after another. The car runs fine but I just can't get on it and a cold start issue. (Timing Pulls like crazy after the SAP turns off) I can feel it and its in my datalog as well. 

I am about to jack her up tomorrow and tear her down again. This time will be the last time I hope. I will be doing my Transmission VB Mod, M3 Rearend Swap, Custom Driveshaft, Zionsville Radiator and Expansion Tank, Tial 50mm QR BOV, New ATI SuperDamper, 95mm Rotrex Pulley, ARD Underdrive Kit, Apex ARC-8 18'' Wheels, Bosch Motorsports 60lbs Injectors and a few other goodies. 

Yes, I did installed some shrick 248/256 FI cams in the car and 3" exhaust with the help of Brady. They are a PITA to install but well worth it. When finish and done. I am expecting about 400 or so WHP. So wish me luck 

As far as tuning goes. I have yet have time to send Zak@AA a good Datalog (30mins or so) of the car from a cold start and warmed up operations. Hopefully, AA can get my tune squared off and running correctly. My other option is go with a Stand-A-Lone ECU unit and that will be some fun...