Stock Turbo on MS6
- Thread starter USAFVMI08
- Start date
Found the comp map on another forum yesterday but I can tell you that basically the standard turbo at factory Mazda settings is running pretty close to the choke line so once you guys start modding then it pushes the turbo speeds beyond its optimum compressor efficiency.
GioDiGreek
Member
Can you give us any numbers or graphs? I would like to see how is in comparison with other turbos
Garry68, I'm curious what your take is on the PG turbo rebuild for the stock k04. I know in the supercharger world a port/polish and internal modification on a stock blower works wonders, but does the same apply with this setup? I'm mainly asking since I am still undecided if I want to go the rebuild route or start working towards upgrading components to support a larger turbo in the future. I'm not looking for massive gains, just looking to keep things in line on a slightly bumped up scale.
GioDiGreek
Member
Silo Thank you very much sir for the quick post. I just have the same delima with Myriad. I love the power gains but on the safe side. I strongly believe that engineers put a lot of effort to built a turbocharged engine with DISI technology and had their reasons to choose this turbine. Always room for improvement but what is right? Unfortunately for me I don't have the space and tools to research and experiment with the turbines. Just thru theory research. So every little info counts for me and I guess for other tuners.
Ok from reading over the PG article it seems that they have polished / plated the comp cover which would give slightly better aerodynamic performance anyway due to relative aerodynamic drag factors.
Additionally, they are using a slightly larger compressor wheel which is billet aluminum so not only is it able to flow slightly more air, it can do so operating with slightly higher tip speeds. Although the original compressor wheel was not exactly moving at snail pace with a maximum tip speed ca. 520 m/sec (169,000 rpm) the billet wheel can operate ca. 560 m/sec however they would not usually be running near their maximum at standard factory settings.
So long as the comp cover is re profiled correctly to take the larger wheel then there should be no problems in achieving more airflow at the same factory boost pressure setting, therefore a "safer" higher HP and TQ output.
GioDiGreek - When turbos and engines are matched we predominantly look at emissions and fuel efficiency. High HP and TQ numbers are just a by-product of these key factors. Basically, the faster the turbo is able to operate, the better fuel efficiency and lower emissions you get due to improved AF ratios.
This is a very strong trend is Europe now where you can find small turbocharged 1.4 litre engines which run very low gas mpg, have great emissions but have very high power to weight ratios. God bless emissions legislation!!
Additionally, they are using a slightly larger compressor wheel which is billet aluminum so not only is it able to flow slightly more air, it can do so operating with slightly higher tip speeds. Although the original compressor wheel was not exactly moving at snail pace with a maximum tip speed ca. 520 m/sec (169,000 rpm) the billet wheel can operate ca. 560 m/sec however they would not usually be running near their maximum at standard factory settings.
So long as the comp cover is re profiled correctly to take the larger wheel then there should be no problems in achieving more airflow at the same factory boost pressure setting, therefore a "safer" higher HP and TQ output.
GioDiGreek - When turbos and engines are matched we predominantly look at emissions and fuel efficiency. High HP and TQ numbers are just a by-product of these key factors. Basically, the faster the turbo is able to operate, the better fuel efficiency and lower emissions you get due to improved AF ratios.
This is a very strong trend is Europe now where you can find small turbocharged 1.4 litre engines which run very low gas mpg, have great emissions but have very high power to weight ratios. God bless emissions legislation!!
GioDiGreek
Member
I remember when I was living in Greece I had a FIAT PUNTO 1.4 liter engine with turbo. Factory stock was producing 134HP. With full exhaust and "chip" and intake 186HP. Amazingly strong. Also FIAT had another engine natural aspired wich called "FIRE" 1 liter 100HP. Full ball bearing. Good Memories. So Garry let me ask you, my speed6 is 2007. Do you know if is a different turbine setup between years? I heard also at the dealer the mechanic was replacing turbochargers on speed 3s because of failure. Is our speed6 ok ? Thank you.
Hey Gio, pretty impressive numbers out of your FIAT. You know what FIAT stands for right..... Fix It Again Tony!!!
The K04 turbo is fine running in the 3 and 6 at under normal conditions. Start to add non factory parts to increase the power and problems CAN happen but not to say WILL happen.
If you guys are really looking to put some extra boost into your engine then the K04 would not be the most suitable solution IMO.
The K04 turbo is fine running in the 3 and 6 at under normal conditions. Start to add non factory parts to increase the power and problems CAN happen but not to say WILL happen.
If you guys are really looking to put some extra boost into your engine then the K04 would not be the most suitable solution IMO.
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GioDiGreek
Member
I am not looking for carzy things. Just some bolt ons. CAI, Access Port form COBB, turbo back exhaust and mabe a front mount intercooler. It will be too much? Thank you.
