hey guys i just ordered my invidia 02 housing and my buddy said that aftermarket 02 housings cause boost spikes bad.. How do you prevent boost spikes? and what are results from boost spikes?

 

if i remember correctly.. if you run a good MBC and have a good portjob

 

well the only o2 housing that really should cause boost spikes are ones which do not have a large enough hole for the wastegate ...example the megan o2 housing i had to dremel it out so the pressure wouldnt build up and in turn cause my boost to spike with the invidia you should be fine everything i heard about that o2 housing is that its the largest so i dont see you having a problem....with that o2 housing you have to extend you o2 sensor.

 

avoid by not going into boost lol, jp make sure you do a boost leak and make sure everything is tied on tight

 

It depends on which o2 housing you end up with. I personally went with evopowermods.com o2 dump and it doesn't spike or creep.

 

is there a diff between that and others?

 

You can alter some of the boost overshoot behaviour with the bleed hole size on manual boost controller setups. There should be a bleed hole after the output of the MBC somewhere before it reaches the Wastegate Actuator.

A Larger hole will tend to give it a weaker signal and better spool with more overshoot until enough pressure builds up and moves the WG. Smaller holes will tend to hold more of that boost in and will reduce the boost spike at the expense of slightly less spool, although honestly the turbo is already spooled up pretty good by the time you are moving air past the MBC towards the WG anyways.

How much of the boost signal is reaching the MBC can also have an effect, I left the restricter pill in my boost line which means it delays the point where enough boost is in the line to move the WG. Typically having 1-2 PSI boost spike with it returning to the set point right after is ideal for best spoolup.

 

upgraded wastegate actuator.