[nikitopo]

I was researching this topic for some time. Our cars don't have an external EGR system, but it looks that a similar functionality was implemented in the factory cams. Specifically, in the exhaust cam which retards the closing time of the valve. This was mentioned in an official engine paper (file attached). The Piper Stage 2.0 cams (272° 266°) are particularly good to eliminate this setting and enhance the scavenging effect. The HKS cams don't do anything to eliminate this setting. Does it really matter? Are there any considerable gains if the rev limit is not raised? No one really knows, because we don't have any dyno results.

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