A little while back we blog'ed about the tuning success one of our GReddy GTR Master Tuner Shops, SP Engineering, was having with our GReddy R35 TD06SH-20 Twin Turbo Upgrade Kit. Well we are happy to report an update. Over the weekend, they began to boost up a little more from their 706whp @ 1.45kg/cm2 to a crazy 816whp @ 1.7kg/cm2! Not only does it make great peak power, but if you notice on the graph, the mid range is still quite good with 360whp at 3500 RPM & 520whp @ 4000 RPM...
And the guys at SP Eng, tell us they are not done yet. We can't wait to see how much they end up with!