good mbc that holds 35psi+

[95burgundyesi]

My homemade mbc kinda spikes and is hard setting boost above 28psi. Anyone know of a proven mbc that will hold all the boost I want to throw at it?

 

[viprez586]

When running that high of boost, it is probably best to get an EBC. With that much psi the mbc spring will get slammed open - hence your spike.
I have a hallman evo in-cabin MBC and when i run 20psi or anything over 20psi - i get spikes to 22-26psi.
To get a quality MBC you're already spending at least half the cost of a good EBC like the tru-boost or profec.

 

[donniekak]

I've used an ebay nxs with a stiffer spring on my hx40 car set at 38psi. The only ebc I would trust at that high of a boost setting would be using the boost control settings of a aem or other stand alone. Most ebc's use a 3 bar sensor, so boost control over 30psi is impossible.

 

[viprez586]

AEM's tru-boost has a sensor to support 60psi.

 

[pneumo]

MBC's can work at high psi if the wastegate spring is stiff enough. It won't work so good if you have an internal WG with a large 34mm flapper.

 

[95burgundyesi]

I think the spring I have in there is just maxed out. I will go to the hardware store and go through the bin of springs, and find one a little bit stiffer and cut to size. I already need a new boost gauge. I never thought I would be going over 20psi when I bought the car haha, now the autometer gauge pegs in what i like to call "Oshit" zone where the gauge face has no markings.