@550 Phil posted:I’m probably the only person on this site to have owned a Spyder with a stock EJ25 engine and stock ECU and also a Spyder with Outfront “200”hp EJ25 with built heads and Stinger ECU. My new car does have a LSD and a better shifter. But I can tell you from the seat of the pants. There is absolutely no comparison in the performance of these 2 vehicles. My new car would smoke my old car. I was told by the builder of my first engine to just put 87 octane in the car since with a stock ECU there would be no difference in performance between regular and high test. Of course I tried premium and could never tell the difference. Obviously there’s no difference in displacement between these two engines. Difference has to be compression and ECU tuning. I know the argument for going all stock. But I’ve been there. Done that. My new car screams. I’m just not interested in stock. Also not interested in forced induction.
We were not trying to disparage your build or any on here that have opted for a NA with a bit more oomph.
I also agree that your experience is different Phil, as you compared two engines and when building from new it makes sense to add some discretionary spending to get a solid 200hp engine and an ECU curve that makes the car more responsive as they can even change the Drivebywire throttle response that would give you more seat of the pants inertia. I am happy, that your happy with it, truly. Personally, I don't like forced induction either and with 175hp NA in my car it is hard to justify just doing a 10K upgrade for 25 hp unless the engine requires it which it does not at this time... the madness could get me though. 