Throttle boost on 91 tune?

[ROBSMST]

I understand the 91 boost comes standard with 15% throttle boost.

If I go into adjustable settings and set it at 5% does that mean it is now at 20% or did I set it down to actually 5%?

[TerrysRam]

Good question. subscribe

[mikel]

adding 5% takes it to 20% total.

[ROBSMST]

thank you mikel!