Damn my mbc sucks ass....
#1
Damn my mbc sucks ***....
well, I was curious if I can run a lil more boost yesturday and decided to make one of those home depot mbc. My stock wastegate is at 5psi, but I wanna get it about 7-8 tops. so I got all the fittings and a the ball bearing and the spring. hooked that ---- inline with my wastegate and drove hard on the streets it went to 7psi. I was like okay, cool. Whats fucked up about it is it's not consistant, sometimes it would overboost getting nearly 10psi maybe more if i hadn't let off the throttle. I dunno if my spring is weak or or that ball bearing doesn't work, but this ---- doesn't work. I know some of you out there use them all the time and probably did it right or somthin but mine was those ones off c-speed racing.
#5
Re:Damn my mbc sucks ***....
Originally Posted by Boost n Ls
hey, can u tell me what exact parts your using? to make the ball and spring mbc? i mean i probably have a leak somewhere in the boost controller.
-1 1/8th npt brass tee
-2 1/8th npt brass nipples (for pressure lines)
- one ball bearing (a 'bb' is too small!) and spring from a pen- preferably as close to the size of the inside of your tee as possible.
-look @ pictures for the rest, it requires a bit of creativity.
Parts:
cut nipple:
Throw out piece you cut off and thread hole (to the size of your bolt):
Assemble as so:
Goes together like this:
Now you have a home made manual boost controller. Use wisely.
#7
Re:Damn my mbc sucks ***....
how do you adjust those things anyways? which direction you turn to raise and lower boost? I want to run really low boost untill my piston ring brake in, I will set the wastegate to like 2 psi, and adjust up to 10 psi, how high can you adjust it with those? I got mine off ebay.
#8
Re:Damn my mbc sucks ***....
This is the website I stole it all from anyways:
http://www.geocities.com/chmwatson/FAQs/mbc.html
Go check it out, it has everything you need to know.
http://www.geocities.com/chmwatson/FAQs/mbc.html
Go check it out, it has everything you need to know.
#10
Re:Damn my mbc sucks ***....
use the grainger valve from mcmaster, it's $7.00 for same basic ball/spring but it's meant for higher temps which will not deform the spring and create spikes
mine held what i want all rpm in all temps... -20 and like 35C
http://www.xmission.com/~dempsey/perform/grainger.htm
reason why this doens't spike and works better because of the nice strong brass housing, the stainless steel spring which can withstand temps up to 300C and the stainless ball which is good too...
mine held what i want all rpm in all temps... -20 and like 35C
http://www.xmission.com/~dempsey/perform/grainger.htm
reason why this doens't spike and works better because of the nice strong brass housing, the stainless steel spring which can withstand temps up to 300C and the stainless ball which is good too...
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