any one know how to stop boost spikes. i picked up aManual Boost Controllerform vast but i dont know how to instal it. will this stop my spikes. or is there anything else i can use, i go from 22 to 12 and hold at 15. thanks...

 

The MBC really won't stop boost spikes. The K03 turbos aren't that big and are out of their efficiency range after 15 psi, so in other words the boost will fall flat on its face after you hit about 5k RPM's. You're also gonna screw up your turbos faster which means you're gonna have to pull your motor out sooner to put in new turbos. I say just stick with your APR chip.

 

so how would i stop the spikes? thats a big fluctuation.

i did timing belt, waterpump,intercoolers, alt, hoses and a few other things put it all back together today and then test drove it. its running good but feels like im at a15% loss in power. i did aboost leak test at 10psi no leaks. i dont know if it has some thing to do with the spikes or if its some thing else.

 

1. Get a Vag-com
2. Run some logs
3. Test for boost leaks
4. Test for failed parts, DV's TBB, N75, N239, etc...
5. If you want to install the MBC, vast has great instruction on their web site.