forge unos mbc installed.
Feb 5, 2006, 01:21 AM
#1
forge unos mbc installed.
i installed the forge unos mbc today and its great. i have the soft spring in it now. it is set at 19 psi and drops to 18psi by redline. tomarrow i will put the stiffer pring in and turn the boost up to 20psi. install was really fast and easy. i have never done one befor and it went great. i found a few how to's on this site with some pics and diagrams that helped alot. took about 40 min at most. now i think im going to get the forge w/g/a to eliminate boost taper for good. or at least i hope. il update you all soon on how the stiffer sring works and then the w/g/a.
Feb 5, 2006, 06:55 AM
#3
Dan, definitely put in the stiff spring, but then turn down the MBC knob all the way to minimum. Go out and test the boost, then slowly adjust the knob until you get to 20-21psi. The Forge WGA is not really something you buy to eliminate boost taper completely. The turbo needs to taper down, because it can't maintain high boost at high rpms due to its inefficiencies, but when you start running high boost on race gas or alky, then it will come in handy, because it will help you maintain 24-27psi longer before the eventual taper at high rpm.
Feb 5, 2006, 07:58 AM
#4
Originally Posted by truedefekt
i installed my mbc from forge as well but the spring that came already inside the mbc was teh suck.. for me at least it would only boost to 16psi all the way turned up.. I then took the stiffer spring and installed that woohoo 19psi all the way to redline.. my 03 with just that mod can now sit side by side a stock 06 STi (my friends) my only concern is why the boost is 19 1-4th gear but on my 5th its 21psi ? great mbc and easy install, although i did have to take off my stock airbox and my underneath black thingy ( diffuser? )
Feb 5, 2006, 08:02 AM
#5
Originally Posted by Warrtalon
Dan, definitely put in the stiff spring, but then turn down the MBC knob all the way to minimum. Go out and test the boost, then slowly adjust the knob until you get to 20-21psi. The Forge WGA is not really something you buy to eliminate boost taper completely. The turbo needs to taper down, because it can't maintain high boost at high rpms due to its inefficiencies, but when you start running high boost on race gas or alky, then it will come in handy, because it will help you maintain 24-27psi longer before the eventual taper at high rpm.
when i put the stiffer spring in i planed on turning it all the way down. will that be 20 psi or will i have to ajust some. i will do the same thing anyway *** i did with the soft spring but just trying to get a head start on what will go on.
Feb 5, 2006, 08:46 AM
#7
No worries, dan. The UNOS is very easy to take apart and reassemble. The reason why people have problems with the spring is they don't realize that it has to be fully-seated on the nipple. They just kinda throw it in the cylinder with the ball on top, but that doesn't work. You will find that the stiff spring doesn't sit right on the nipple. You have to work it on there, but once you get it, it will stay. In fact, it will stand straight up without you holding it, because it's a tight fit. Once you do this, put the ball in the other half of the UNOS, then put the two halves together and screw them together.
With the stiff spring set at minimum, no, it won't be at 20psi. It should be more like 16-17psi, then it will take 8-12 clicks to get to 20psi PROBABLY, but don't rely on that. Tune it a few clicks at a time until it's perfect.
With the stiff spring set at minimum, no, it won't be at 20psi. It should be more like 16-17psi, then it will take 8-12 clicks to get to 20psi PROBABLY, but don't rely on that. Tune it a few clicks at a time until it's perfect.
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Feb 5, 2006, 09:15 AM
#8
Originally Posted by Warrtalon
No worries, dan. The UNOS is very easy to take apart and reassemble. The reason why people have problems with the spring is they don't realize that it has to be fully-seated on the nipple. They just kinda throw it in the cylinder with the ball on top, but that doesn't work. You will find that the stiff spring doesn't sit right on the nipple. You have to work it on there, but once you get it, it will stay. In fact, it will stand straight up without you holding it, because it's a tight fit. Once you do this, put the ball in the other half of the UNOS, then put the two halves together and screw them together.
With the stiff spring set at minimum, no, it won't be at 20psi. It should be more like 16-17psi, then it will take 8-12 clicks to get to 20psi PROBABLY, but don't rely on that. Tune it a few clicks at a time until it's perfect.
With the stiff spring set at minimum, no, it won't be at 20psi. It should be more like 16-17psi, then it will take 8-12 clicks to get to 20psi PROBABLY, but don't rely on that. Tune it a few clicks at a time until it's perfect.
as for the psi seting. i will do like i did befor and also as you said. il keep this thread posted. also im going to find all the good info i got and post for others. bbs
p.s. i member someone saying to grease the ball. should i leave it alone or what.
Feb 5, 2006, 10:53 AM
#10
Originally Posted by evodan2004
ok it is in. spring was set right on the nipple. lol i took it apart and it shot across the room. sweet.
p.s. i did not grease the ball. going to dial it in now. brb
p.s. i did not grease the ball. going to dial it in now. brb
Feb 5, 2006, 10:55 AM
#11
Originally Posted by Warrtalon
The greasing is not necessary unless you have issues with boost. I haven't greased mine, but if you do grease it, be sure to use FULLY SYNTHETIC grease.
