[Reason]

I am also having the 'bogging' issue. First off, I wouldn't call this a bog. It feels much more like a complete dead spot in acceleration. Some people seem to be reading the term 'bogging' and just thinking of a car that isn't accelerating. This actually feels like the engine suddenly cuts fuel or lets in to much air and so tries to stall. This is not just a flat spot in torque or power.

I've noticed it when both moving from a dead stop (takes a measurable, noticeable amount more pedal travel to avoid stalling and to accelerate) and when doing the 1-2 shift I need to be further into the pedal travel for a smooth shift. It's also noticeable if you drive in 1st gear at a parking lot speed using the lightest throttle opening you can without bogging or stalling the car. I have to do this on a daily basis due to my awkward parking spot at work and I can say with 99% certainty I'm having to step much further into the throttle putter the car along at 5km/h. At throttle load above 40% you don't notice it at all even modulating the throttle. It only seems to be at low speeds with high engine load.

For record, I am on a completely stock car other than this intake and I am running 94 octane no ethanol fuel like I have since day 1. I drive the same boring route to work daily and know my car like the back of my hand. I need to put more throttle into it to move up my inclined driveway at parking speeds, or up the long steep hill I drive up to work every morning that hits that lovely spot that isn't quite slow enough for 1st but isn't quite fast enough for 2nd.


The best way to sum it up is It feels as if there is a much larger off idle dead spot. Similar to a dead spot in a TPS or a mild vacuum leak.

It also seems to come and go, and it has been quite cold here the last few mornings so I'm wondering if it might be enivornmental

I've gotten a second opinion on this and this is definitely not in my head. I'm actually going to put the car back to stock tonight so I can do repeated tests to isolate this further and am prepared to start logging to prove that this is occuring.

I can honestly say that if this isn't something like installer error or a simple fix, I will be putting the car back to stock as it is noticeable worse to drive around town and at low speeds. I really hope its just as simple as I have a coupler installed funny and it's got a slight vacuum leak.