This is a non-scientific review. I don’t have drag strip run data, it’s only about my thoughts and impressions.
I removed the JB4 last night. I’ve driven just 20 miles without it today, and here is my review of the Burger Tuning JB4.
I think getting a read on the JB4 is made easy by removing it, just as much as it is installing it. The absence of the unit — after using it for 3.5 months — makes a difference felt just as strongly as adding it.
Without the JB4…
The midrange kick is gone – 2500 to 3500 RPM, of course
But the kick made the throttle touchy right where I set higher-than-stock boost levels (2k-3k RPM)
You know what? The stock VW 1.8 is pretty good the way it is!
I ran the JB4 with its stock settings for a month before increasing the boost at certain RPM levels… custom map.
I’m going to leave it off for a few weeks to get even more of a gauge on how much power is missing and how fuel economy is affected. While I had the JB4 installed, I didn’t notice a significant loss or gain in my Alltrack’s fuel economy.
After a few runs to Castle Rock to get some data on MPG, I’ll make another JB4 post, this one specifically MPG apples – apples with actual numbers.
So I wanted a little more power delivered safely — well within the VW 1.8 4-cylinder’s happy place. And I didn’t want even “bolt-on” level of mods. This Burger Tuning JB4 isn’t even bolt-on level because it’s so easily reversed and removed. And at $429 it’s not cheap but it won’t break the bank either.
Additionally, if I didn’t like it I could remove it and sell it fairly easily.
On a new car, that’s the level of commitment I’m comfortable with.
JB4 Install on a 2017 Golf Alltrack – Overview
The install took about 2 hours. It’s one of those where the next time you do it it takes 1/2 the time.
I removed the battery to get the OBDII wire through the firewall. It makes it so much easier with the battery gone.
Some people say they can get the lowest connector done without jacking the car or using ramps. I have no idea how. I didn’t even try without jacking and removing the belly pan/splash guard. Wrong! I tried this last night, a week after the install, and I could get my hand down there. Undid the clip even.
For jacking points, I found this, but it’s really the same as any modern car: use the strong points on the subframe, when raising the front of the car.
JB4 Install Notes and Tips
Plugs B, C and D are pass-throughs. That means they go in-between the female and male connection that are already there. Unplug what’s there, insert the JB4 connector, then put what’s left into the JB4 connector. Of course, the blue AFR wire and OBDII connections you don’t do this with.
JB4 driving and power impressions coming soon in a post here. Also look for a post about the effect of the JB4 on my Alltrack’s MPG.