How-to: +2psi for a cheap $5

[Pretzellogic]

I like it. I wouldn't do it to my car, but horay for cheap innovation.

Of course, my car does a fair share of zip-ties holding it together.

 

[CasopoliS]

You all make valid points. I never thought about the warranty and what would actually happen if the spring broke. I never think of that because I voided the warranty a long time ago.

 

[Rainman]

I think that this is an acceptable mod as long as you know what tension of spring that you are applying. I also think that it will provide more accurate and reliable (read: consistent) alteration of boost than an MBC will. Just because it doesn't cost alot, doesn't mean that it isn't worthy. s***, have any of you naysayers taken apart your MBCs before? If you have the mechanical aptitude to install parts on your car then you should know that most of the MBCs can be reproduced with less than $15.00 worth of parts from Home Depot. The only thing separating Home Depot ghetto-ized MBC and one from a known entity (e.g. Joe P MBC - which I do own, but do not have installed) is that they have had someone else offer up their car as a guinea pig to make sure that it wouldn't blow anything up. However, all it takes is a little bit of patience, some mechanical aptitude, and some ingenuity to copy something. In fact, many of the MBCs use an internal spring to provide resistance which in turn allows you to control boost pressure.

R

 

[peepsalot]

Hell, I think I might do this eventually once my wideband comes in and I get a laptop for my fuel controller. Just remember this though, the tension in the spring (2lbs for example) does not necessarily translate to +2psi. Since psi is lbs/sq in. You have to take into account the area of the wastegate actuator diaphragm(whatever that may be). If it is less than 1sq in then one extra pound of force will require >1psi to open, and if it is bigger than 1sq. in. then it will be less than 1psi extra boost per pound of tension.

 

[Stormtrooper77]

If I didn't already have an EBC I would've considered this mod. I think it looks decent, it serves it's purpose and ups the boost. What's to dislike?

 

[Rainman]

^^^Good points Peepsalot. This is an important note. Calibration of the spring to a particular PSI is where trial and error comes in.

R

Hell, I think I might do this eventually once my wideband comes in and I get a laptop for my fuel controller. Just remember this though, the tension in the spring (2lbs for example) does not necessarily translate to +2psi. Since psi is lbs/sq in. You have to take into account the area of the wastegate actuator diaphragm(whatever that may be). If it is less than 1sq in then one extra pound of force will require >1psi to open, and if it is bigger than 1sq. in. then it will be less than 1psi extra boost per pound of tension.

 

[FSDET]

okay okay your mods awesome enjoy.

why are u being a jackass ? why does everyone has to attack someone with a new idea... theres nothin wrong with this mod. actually thats exactly what i want to do. raise the boost 2 PSI without having a faster spool or spiking issues that you get from a MBC and YES ive tried 3 kinds of MBCs already and the Apexi EBC which still spikes up to 2 PSIs u might not notice it but if u have invested a couple of hundred more and bought an electronic boost gauge with the peak hold instead of the autometer ull see it . Thanks for the How-To

 

[CChris704]

one problem is in the first part of your write up you talk about two red circles...one is supposed to be blue but i dunno which one.

 

[FSDET]

the second red is supposed to be blue

 

[TampaSport20]

This mod is perfectly ok..Most MBC's are just a ball and SPRING valve anyway. Although a cheap MBC can be had for about the same $5 price all day on ebay

 

[BlkZoomZoom]

Nothing wrong with adding a spring, I wish I thought of it before I had adjusted the rod length, would've saved me alot of time.

 

[DragonEye]

this is a dumb idea... if you want a good setup, MBC and tune it.. it will cost you $30 more but you can get more power out of it.. dont mess with $1 mods.. usually they cost you alot more than that.

 

[BlkZoomZoom]

coming from a guy owning a vw....lol. sorry.

 

[DragonEye]

coming from a guy owning a vw....lol. sorry.

im not saying its a good set-up for a VW... for VW's chip and then tune to your liking... its totally different for setting up, but with the MSP you are better off with a MBC and tuning it accordingly

 

[terbow]

hes mocking ur vw, and its a turbo trick not an msp trick. turbos are universal, its a fine mod if you just want some extra boost. MBC can spike 1+ psi so its not always better, and this isnt about which gets more power, its not for 5+ psi gains. its for a 2 psi boost.

 

[CChris704]

plus mbc and tuning costs more then 35 dollars....

but i like vdubs

 

[jurgs01]

Great idea. All of you who are saying don't be cheap and buy an MBC: What do you think an MBC does? Cuts the airflow to the wastegate so it opens at a higher PSI. Now that's a rigged idea that's done on a large scale. You could even get a higher lb spring and boost 10psi, etc. The downside is that you won't have control.

 

[Dexter]

**** it dudes, just get a boost gauge and a clamp off the wastegate hose.

 

[msp35]

**** it dudes, just get a boost gauge and a clamp off the wastegate hose.

Yeah, then just let off the gas when you get where you want (naughty)

This is definately better than turning the rod, which I WAS contemplating. But I am a puss so I'm still @ stock boost 7.5psi wooohooo

 

[DragonEye]

hes mocking ur vw, and its a turbo trick not an msp trick. turbos are universal, its a fine mod if you just want some extra boost. MBC can spike 1+ psi so its not always better, and this isnt about which gets more power, its not for 5+ psi gains. its for a 2 psi boost.

i know what he is doing, and its mostly used for the MSP because it comes stock turboed...

incase you didn't know my car is turboed as well. adjusting the wastegate when not using real programing/tunning for the car is PART of tuning it. it isn't a "lets unscrew this and call it a day" mod... i guess im just used to people tuning their cars correctly and getting them to run like they should.

and with this post im sure i pissed off at least 20 people... do i care? no because i drive a VW. (laugh)