…it worked! MKC’s tuner Chad Charlton was able to safely get 409 WHP with a very safe 332 lb-ft of torque on 93 octane by letting the turbo initially hit 14 PSI and feeding it to 17 PSI up top like a supercharger, so torque would stay the same and keep engine longevity happy (red line). With a splash of E85 (bringing the total ethanol content up to around E35-40), Chad played with a little more ignition timing and boost, brining the grand total to 476 WHP, while still keeping the torque at just over 360 lb-ft, which was about where I wanted to be. Boost here was between 15 PSI to 19 PSI up top.
Apologies for not having the old blue 67mm baseline graph overlayed with these, but at 4600 RPM–where were were hitting 240 lb-ft of torque before, we were seeing 300 and 330 lb-ft with the new turbo on 93 octane and E85, respectively! I got to drive the car at this 476 WHP level and it was simply intoxicating. The turbo hit much smoothly, and sooner. But if I kept my foot in it throughout each gear, that top end was like no other turbocharged car I’d driven before. Like a centrifugal supercharger that doesn’t give up, it really felt like I was tossing 1000 lb of weight out the window with every impremental 1000 RPM. It was so smooth, but yet plenty fast. And the sound at nearly 8000 RPM with the MKC-fabricated Vibrant exhaust system brought a smile to my and my passengers’ faces every time. What I was experiencing was nothing short of awesome–this is why I’d always wanted a Skyline GT-R!
Fast forward a couple of weeks and, well, as luck (or lack thereof) would have it, I started to see increased smoking from my catch can, and so much so that I could clearly smell it in the cabin. This killed the fun in driving the R33 GT-R. The car had always had this burnt oil smell a little bit anyway, but now it was noticeably and visibly worse.
I’m sad to report that I haven’t experienced the car at 517WHP because they went ahead and pulled the head the very next day to investigate the smoke. We decided to go ahead and do a fresh build, so I can drive the car smoke-free, and with confidence. Stay tuned, MOTOIQ’s Mike Kojima and Martin Gonzales already have the new pistons and rods in their hands at the Southern California headquarters, and they’ll be going through these highly anticipated components in detail via video! Stay tuned.