Boost

darkcrave · Post by **darkcrave** » Sat Sep 17, 2011 4:55 pm

My boost builds strong to 10/11 PSI but after that it takes way to long to build to 18/19PSI. So slow the power feels useless. any ideas?

beatersubi · Post by **beatersubi** » Sat Sep 17, 2011 5:16 pm

Wastegate spring?

darkcrave · Post by **darkcrave** » Sat Sep 17, 2011 7:45 pm

Not sure? is their a way to clean the spring? or lube or whatever

beatersubi · Post by **beatersubi** » Sat Sep 17, 2011 10:10 pm

Not in a factory wastegate actuator. I was thinking more of a weak spring which would allow the wastegate to partially open under less-than-full boost thereby slowing the building of further boost.
What kind of boost-controller are you using?

darkcrave · Post by **darkcrave** » Sat Sep 17, 2011 10:24 pm

OBX, i was using a forge and that one work better but the nipple broke ( With the boost controller removed and leaving the wastegate nipples open to the air, the boost builds fast. Just uncontrollable )

beatersubi · Post by **beatersubi** » Sun Sep 18, 2011 6:37 am

Did you experience the problem before switching boost controllers?

darkcrave · Post by **darkcrave** » Sun Sep 18, 2011 9:20 am

my forge was on my on my VF11 boosting above 15psi no problems. But the nipple broke on on end
I purchase the OBX MBC then i installed my TD05H, so i havent tryed the forge on the TD05H, i think im going to try and repair the forge MBC tomorrow and see if it makes a difference

beatersubi · Post by **beatersubi** » Sun Sep 18, 2011 5:40 pm

You could also swap the wastegate actuator (if they interchange) and see if that makes a difference.

darkcrave · Post by **darkcrave** » Mon Sep 19, 2011 3:36 am

are the VF11 and the TD05 swappable?

beatersubi · Post by **beatersubi** » Mon Sep 19, 2011 4:20 pm

I've never had a TD05 next to a VF11, so I couldn't say.

Post by **Legacy777** » Mon Sep 19, 2011 5:30 pm

If you try moving the actuator by hand and it's pretty stiff, then it's likely ok. As you mentioned, I'd suggest getting your other boost controller working and try that.

darkcrave · Post by **darkcrave** » Thu Sep 22, 2011 7:53 pm

Old mbc did the trick, strange the OBX was so Fail?

beatersubi · Post by **beatersubi** » Fri Sep 23, 2011 1:59 am

I'm not exactly familiar with how either work, however...
A spring check-valve style controller sends no signal pressure to the wastegate actuator until the set level is reached. The actuator, therefor, keeps full spring pressure on the gate until the preset level is reached.
'Bleed' and adjustable orifice style controllers allow partial signal pressure to reach the actuator until the full preset pressure is reached effectively reducing the spring pressure in the actuator and possibly allowing the wastegate to partially open, slowing the further building of boost.
It could simply be a matter of the differing operation of the controllers.

legacycentral bbs

A forum for 89-94 BC-BF(BJ) Legacy Owners and Fans

Boost

Boost

Re: Boost

Re: Boost

Re: Boost

Re: Boost

Re: Boost

Re: Boost

Re: Boost

Re: Boost

Re: Boost

Re: Boost

Re: Boost

Re: Boost