Stage 1+ Unitronic ECU tune boost question

Hello all!

I've a 2017 GTI S with DSG with about 5k on it (bought it CPO with 2k a little while ago).

I've since performed an oil change, removed the snow guard, installed an AFE Dry filter, and just recently flashed Uni's Stg 1+ ECU tune.

Had a quick question about the boost levels I'm seeing. I know the infotainment boost gauge takes atmospheric pressure into account and I'm about 1400ft above sea level so that's about 14-14.5psi.

The max boost I'm seeing on a rolling 10-100mph onramp sprint is 34.5psi, meaning my actual peak boost is 20-20.5psi.

Is this normal levels for this tune? I know Uni doesn't crank the boost like others, but I can't find much info about boost levels and their tunes. Everything else about the car is perfect, plenty of power (can't hardly keep the tires from spinning in gears 1-3).

I just wanted to check with y'all and make sure I don't have a boost leak or a bad diverter or something.

Any help would be very much appreciated!

Sounds about right.

Diggs24 said:

Sounds about right.

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Very cool. Can you tell I'm a complete n00b about this stuff?

I've been driving trucks for 16 years and traded in my '13 EcoBoost F150 for this GTI so I'm definitely playing catch-up. I love it though. My F150 was tuned and almost FBO so it was damn quick for a 6000lb hunk of metal, but this GTI with just a tune and minor intake mods demolishes it.

Thanks for the response!

s4in7 said:

Very cool. Can you tell I'm a complete n00b about this stuff?

I've been driving trucks for 16 years and traded in my '13 EcoBoost F150 for this GTI so I'm definitely playing catch-up. I love it though. My F150 was tuned and almost FBO so it was damn quick for a 6000lb hunk of metal, but this GTI with just a tune and minor intake mods demolishes it.

Thanks for the response!

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Get an intercooler. Enjoy the power in the summer too.

Or think of it this way. Keep the power you paid for.

I have Uni Stage 1+, and asked Uni the same question.

Here is the reply: "As for the boost pressure, it should boost around 19-20psi under normal conditions, however this can greatly vary as the MQB platform is torque based and if the required torque is achieved at a lower psi, it will maintain that pressure as it is achieving what is being requested."

2017 GTI DSG Uni stage 1(not 1+) here. Running 91 octane with a K&N drop in filter. Boost gauge on the screen says 34.7 psi maximum. Also watched a guy's video on youtube and his mk7 is also Uni stage 1+ and I can see his max is 34.7 as well. stage 1+ make no difference on boost level than stage 1, just a different mapping to run better on 93.

Just for confirmation that this ecu will use less boost if it can to achieve the torque target. I'm Uni stage 2 93 on my 7R. at -20c i get 14-15psi. at -10c i get 18-19psi. at -5 i get 19-20psi. I'm assuming the density of the air is the reason for this. Also for note, im FBO including IC and charge piping, + im running w/m post IC. when the temps get above 0c, im sure ill be seeing boost in the 20+ range. going to dyno it again as i did when it was stock. made 268/262 to all 4, on a mustang dyno running petro94.

I don’t understand the psi issues because my stock m7 shows 34.5 on dash gauge so that would be about 20 psi stock.

Better tires now?