^correct. even in modern engines, after a certain given amount of TPS input, the ECU will pretty much ignore all O2 sensor input, and go into a pre-determined mapping. in older setups, O2 only comes into play in steady state cruise scenarios


and keep in mind, 184whp could be calculated as being 211 at the flywheel, with a very modest 15% powertrain loss

Now I understand. Thanks for the replies. I already understood that that was RWHP and not at the flywheel, so I would be looking for 170 RWHP equivalently as my goal.

I was looking up what it would cost to get my car tuned and it would be
200 for a used apexi neo SAFC
100 to install it
125 for a fuel pressure regulator
150 an hour for dyno and tuning (estimated at 2 hours)

Does this seem reasonable? I could probably install the controller myself.


What sort of power gains could I expect?

Also, btw, 184 RWHP would be 216 flywheel horsepower, not 211.

184 = (.85)(HP)
184/(.85) = HP
216.5 ~ HP

Sorry, I'm a math major and so I couldn't help correcting that.

great numbers. I'm building almost the same setup with an s5 intake and I port my exhauts with pinnaple template. I'm realy curious how much I will pull. I'll keep you updated

its impressive to see what people can do with the NA motors. Put a turbo on damn near anything and it will make power, building a good NA more challenging