VersaTune User Forum

Hello,
I have finnaly found some time to make some dyno test to my car.
The results of it is :

My car mods are :

cp-e cai - cp-e fmic- cp-e upgraded fuel pump - 3 inch custom downpipe (decut) -2.75 inch custom exhaust - k1 rods -wiseco pistons - reworked k4 -devils own meth system.

The car is running 26 psi overboost and holds untill redline 20 psi (with greddy profec b boost controller).

All these mods are under a custom tune ,with Versatune..........

I take it that's whp? Are you using a 3bar map sensor?

skiptownmcat wrote:I take it that's whp? Are you using a 3bar map sensor?

Yes it is whp, no i don`t use a 3bar sensor(i still have the stock)

The stock MAP sensor reads up to 1.5BAR/22PSI (21.75). How is this problem addressed actually?

mituc wrote:The stock MAP sensor reads up to 1.5BAR/22PSI (21.75). How is this problem addressed actually?

Stock ecu operates in close loop lamda all the time. So map reading is not a problem

Are you saying you're in closed loop the time?

The MAP sensor is really only used for overboost protection. All of the tuning tables are based on load which is derived from the MAF input.

Ah, I see. You set the overboost limits above the range of the map sensor but leave the load limits in place?

Looks like so, and since the load is calculated based on the MAF g/s readings (which is still reading consistent data) everything else simply makes sense.

OP, how do your per gear requested load tables look like? I'm just curious.