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Car was on pump gas (94 octane): First baseline pull at 1.4kg (20psi) no tuning.
Car ran super rich. I raised the boost to 1.5kg (21 psi) car still run rich. My A/F above 5k rpm was below the scale 10:1. EGTs never exceeded 850 C. We started playing with the AFC. We saw significant hp gain everytime we lean out the fuel. After a couple pulls, I was able to get the A/F to stay at 12.5 across the rpm. The AFC is so wonderful :)
EGTs were never exceed 900C. They were at 890C all the time. Here's just a comparison of the HKS 2350 vs the stock turbo I dynoed last year.
 I am satisfied with the car on pump gas. Poured a couple gallons of 110 octane inside and start tuning for race gas. I raised the boost to 1.85kg (26 psi) and reset the AFC to run richer. Car pulled very smooth until 5k rpm, then it started misfiring a little bit.
Damn! The HKS twin power apperantly is not up to the task. I have my plug gap at 0.040. It was perfectly fine at 21 psi but not 26 psi. We pulled another run at 25psi and same thing happened. The engine misfired. It stumbled once it hit 25psi. I decided to call it quit since There's nothing I can do about it. I will have to re-gap the plug to 0.035 and dynoed tune-it next time, and plan to run 27psi. Base on the misfired 26 psi pull, I hope to get more than 550rwhp. Now this is totally unrelated, with the race gas setting, can I take this?
 Keep in mind, the engine is bone stock. no nitrous, not even cam :)
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Dyno-tuned the Z yesterday. Results >>> - 
