New 2.5 owner here with some questions

[somerset9]

I had a 2014 Golf auto, then a 2014 GTI manual, 2009 Miata, then back to a 2007 Rabbit.

The 2.5L is probably the favorite engine--definitely not a fast engine but feels lively and has character.

Some quick questions though--

1. How should the NVH feel when accelerating at highway speeds? When I'm in 5th gear and give it moderate gas above 2500 RPM I get a decent bit of vibrations. It feels absolutely fine on city speeds and I try to keep in mind that inline 5 doesn't have primary balance.

2. When engine braking, it feels like the engine lurches down suddenly after 5 seconds under all driving scenarios.

Otherwise, so far so good with the Rabbit.

 

[MLue1]

Welcome back! Change the engine mounts and install one of those inserts in the Dog Bone under the car.

 

[somerset9]

Thanks. I have the dogbone insert on order, also need to replace the front control arm rear bushings--I am hoping that's the main culprit.

 

[somerset9]

Long overdue update, it's was the rear bushings of the front control arm, replacing that fixed the bit of vibrations on acceleration.

 

[Maxey]

As far as the weird engine braking, mine does that too; I'm assuming it's the same part of the factory tune that causes the rev-hang when changing gears.

 

[somerset9]

I don't think it has to do with the transmission. I'm always in the same gear when the lurching thing happens.
I got a United Motorsport stage 1 tune and the biggest benefit was the weird lurch. It just feels like a regular engine braking, where you can feel a bit of deceleration as soon as (or I guess several miliseconds since it's a electronic throttle body) you get off the gas. Highly recommended.