Utah Beast Mode
Ready to race!
Where's all the other Utah GTI owners at? Lol.
I remember that there is something weird with the way the ecu reads the pressure. It gets it from the Map sensor, but I know there is some sort of correction that has to take place.
APR 3.1 tune I'd running 25-28 psi consistently. This is 10-13psi over what the K03 produced. Keep in mind it isn't the pressure that usually blows up internals. It is the back pressure of the restrictive manifold that opens exhaust valves and causes a lean situation. Thus grenades the motor. Once you go big turbo, the restriction is gone, but now the pressure does wear on the pistons and rods.
I remember that there is something weird with the way the ecu reads the pressure. It gets it from the Map sensor, but I know there is some sort of correction that has to take place.
It really is a good idea. I was thinking of developing a less restrictive hot side for the Borg Warner turbo that is used for all the K04 kits. Something you would have to split the CHRA and reassemble to turbo with. Best of both worlds, fast spool time and no back pressure restriction.
Yep that sounds better. I knew it was a "corrected" amount. This is why I rely on my trusty mechanical boost gauge. It never lies to me!
Nah, a new casting for the exhaust manifold leading to the turbo. If you have ever seen a K04 it has a very small runner leading to the turbine wheel On the exhaust side. I think this could be designed a little better to allow better flow but still spool at a good rate. A lot like the disco potato turbo was for the 1.8t.
On this turbo I believe it is mostly due to the very small Exhaust runners. If you look at the big turbo kits, they all have a custom manifold that is hella beefier and flows much better. The valve springs are really only needed when there is a lot of back pressure. The big turbo guys don't usually do springs.