In this thread I will try to show what I have done with the rotrex superchargers on the K motors. I have being playing with the Rotrex on a stock K20Z1 for 4 or 5 years, and bought a Dynapack in December last year to do the development properly.
Long term I am building 89 x 90.7mm, 88 x 99mm, and 89 x 103mm K24 ERL blocks.
These will all have ported heads, and cam profiles I have been developing specially for the rotrex.
In my signature I will keep updating my current WHP and as I find the time I will build the jaydeequantum.com.au web site with plenty of photos of the builds.
With the C38-91 the %eff is pretty good, so I am quietly confident that it might be possible to give the turbos a run for their money, at <25psi boost anyway. I may even try 2x SC in series. We shall see.
c38 81 vc C3094 are dyno graphs of the engine as first run on the dyno compared to the current setup, with the bigger intercooler, 1 months dyno development tuning and bigger SC. This is now about the limit.
509 - 510 are 2 dyno runs with the 509 being the current tune with a C38-81.
I still have the RRC inlet manifold, 74mm throttle body, and a bigger SC to try. The supercharger was given to me to try by Tom at Bullet Cars, who are the Australian importers and they have been very supportive of all my development. I will try, but I am not thinking the gains will be much more that 15 - 30WHP.
Crankshaft BHP is approx 7 - 8% higher than my measurement of WHP on the hubs, so we are at about 550BHP at the crank. The SC rating is 630 less accessories and SC drive so its maxed out. The next one I am going to try is the C38-91 which is 11% bigger. It should be interesting......
our pump fuel is equivalent to USA 92 octane and I run water/methanol injection
Enjoy, Tomola's video of the Jaydee Ariel Atom 600, with 579WHP partially tuned.
and here is the dyno graph of the 579WHP partially tuned motor.
Even though the quality is not great here are some track testing videos.
And Winton in car video with Motec Data overlayed
This is a copy of the Poster from the final year presentation in November 2013,and I thought you guys might be interested. The K25 engine simulation specification was from late 2012 as our Twin Rotrex SC'ed K25 is now at mid 600's WHP but otherwise the information is fairly current.
Common Question's I get.....
Cheers Jeff
Long term I am building 89 x 90.7mm, 88 x 99mm, and 89 x 103mm K24 ERL blocks.
These will all have ported heads, and cam profiles I have been developing specially for the rotrex.
In my signature I will keep updating my current WHP and as I find the time I will build the jaydeequantum.com.au web site with plenty of photos of the builds.
With the C38-91 the %eff is pretty good, so I am quietly confident that it might be possible to give the turbos a run for their money, at <25psi boost anyway. I may even try 2x SC in series. We shall see.
c38 81 vc C3094 are dyno graphs of the engine as first run on the dyno compared to the current setup, with the bigger intercooler, 1 months dyno development tuning and bigger SC. This is now about the limit.
509 - 510 are 2 dyno runs with the 509 being the current tune with a C38-81.
I still have the RRC inlet manifold, 74mm throttle body, and a bigger SC to try. The supercharger was given to me to try by Tom at Bullet Cars, who are the Australian importers and they have been very supportive of all my development. I will try, but I am not thinking the gains will be much more that 15 - 30WHP.
Crankshaft BHP is approx 7 - 8% higher than my measurement of WHP on the hubs, so we are at about 550BHP at the crank. The SC rating is 630 less accessories and SC drive so its maxed out. The next one I am going to try is the C38-91 which is 11% bigger. It should be interesting......
our pump fuel is equivalent to USA 92 octane and I run water/methanol injection
Enjoy, Tomola's video of the Jaydee Ariel Atom 600, with 579WHP partially tuned.
and here is the dyno graph of the 579WHP partially tuned motor.
Even though the quality is not great here are some track testing videos.
And Winton in car video with Motec Data overlayed
This is a copy of the Poster from the final year presentation in November 2013,and I thought you guys might be interested. The K25 engine simulation specification was from late 2012 as our Twin Rotrex SC'ed K25 is now at mid 600's WHP but otherwise the information is fairly current.
Common Question's I get.....
I would place the hose feeding the solenoid close to the Rotrex. This will give you the highest boost source and enable PID control software in your ECU to create the most accurate PWM. As it is before the IC the pressure will be 2-3 psi more and this means the lowest boost setting will be 2-3 psi less with the 4 port solenoid which will give more adjustment range.
Cheers Jeff