Hi
I fitted a mbc today. The ball and spring type from gts chris.
I blocked the tvsv at the vsv end.
Went on a run, 10 psi.
Turned the screw in, still at 10 psi.
Any ideas?
Fitted a manual boost controller, won't go over 10psi.
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Re: Fitted a manual boost controller, won't go over 10psi.
Might not of sealed the tvsv end properly.
Re: Fitted a manual boost controller, won't go over 10psi.
any pics of how you fitted it
Mr2 Rev1 tubby
http://www.imoc.co.uk/forums/garage.php ... e&CID=4217
my build thread
http://www.imoc.co.uk/forums/viewtopic. ... sc&start=0
http://www.imoc.co.uk/forums/garage.php ... e&CID=4217
my build thread
http://www.imoc.co.uk/forums/viewtopic. ... sc&start=0
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Re: Fitted a manual boost controller, won't go over 10psi.
4ndee wrote:any pics of how you fitted it
I'll get one.. i followed the instruction.
Boost leak may be the issue.
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Re: Fitted a manual boost controller, won't go over 10psi.
if it's a GTS chris one, they sometimes need a coil cutting off the spring
Re: Fitted a manual boost controller, won't go over 10psi.
sheppy wrote:if it's a GTS chris one, they sometimes need a coil cutting off the spring
That'll only serve to reduce the boost, not increase it
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Re: Fitted a manual boost controller, won't go over 10psi.
Slarty wrote:sheppy wrote:if it's a GTS chris one, they sometimes need a coil cutting off the spring
That'll only serve to reduce the boost, not increase it
logic.
It's probably a leak.
Re: Fitted a manual boost controller, won't go over 10psi.
did you block tvsv actuator end to?
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Re: Fitted a manual boost controller, won't go over 10psi.
i put a bolt in it. and tied it up.
I think the leak is there. The only option to be honest.
I need to check it again.
I think the leak is there. The only option to be honest.
I need to check it again.
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Re: Fitted a manual boost controller, won't go over 10psi.
Slarty wrote:sheppy wrote:if it's a GTS chris one, they sometimes need a coil cutting off the spring
That'll only serve to reduce the boost, not increase it
i thought it was to give less tension in the spring resulting in actual control of your boost, i bought one years ago and it didn't matter which way you turned it, the boost wouldn't go up or down. cutting a coil off solved this issue.
i'd stick some plumbers tape on all the threads too, they leak like fook otherwise.
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Re: Fitted a manual boost controller, won't go over 10psi.
You turn the knob to apply load to the spring and the ball bearing.
If more load is on the ball bearing it is harder for the air to reach the actuator so more boost is required to move the ball bearing and actuate the waste gate.
If more load is on the ball bearing it is harder for the air to reach the actuator so more boost is required to move the ball bearing and actuate the waste gate.
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Re: Fitted a manual boost controller, won't go over 10psi.
I blocked the airway properly.
Still got the issue.
I think it might be faulty.
Still got the issue.
I think it might be faulty.
Re: Fitted a manual boost controller, won't go over 10psi.
When I bought an MBC, it also holded about 10psi of boost at max.
Then I took off a spring and streched it to be a bit longer. now I can have boost as much as I want. Maybe the better idea would be just to but a stiffer spring, because streching is not the best option probably.
Then I took off a spring and streched it to be a bit longer. now I can have boost as much as I want. Maybe the better idea would be just to but a stiffer spring, because streching is not the best option probably.
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Re: Fitted a manual boost controller, won't go over 10psi.
Huh?
I bought it off GTSChris.
For the mr2.
If it doesn't work I'm sending it back and he can send me a new one.
I bought it off GTSChris.
For the mr2.
If it doesn't work I'm sending it back and he can send me a new one.
Re: Fitted a manual boost controller, won't go over 10psi.
just open it up and see what you can see.
its an extremely primitive device.
personally, i would be buying an electrical boost controller.
in cabin control, set the gain, boost limit etc
its an extremely primitive device.
personally, i would be buying an electrical boost controller.
in cabin control, set the gain, boost limit etc
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Re: Fitted a manual boost controller, won't go over 10psi.
completely agree,
http://www.ebay.co.uk/itm/AUTOGAUGE-EBC ... 336de4ffad
you can't get better value than this, i have one of these fitted and it does the job fantastically
(just to note, r-spec performance in the Uk sell the exact same unit for £135)
http://www.ebay.co.uk/itm/AUTOGAUGE-EBC ... 336de4ffad
you can't get better value than this, i have one of these fitted and it does the job fantastically
(just to note, r-spec performance in the Uk sell the exact same unit for £135)
Re: Fitted a manual boost controller, won't go over 10psi.
sheppy wrote:cut a coil off it,
He wants to increase the boost, not lower it
Cutting a coil off will reduce the preload on the spring. This in turn will make the valve open at a lower amount of boost thereby opening the wastegate actuator at a lower boost.
@OP You can, as Greddy MR2 suggested, "stretch" the spring slightly, which may help
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Re: Fitted a manual boost controller, won't go over 10psi.
I know how they work. The problem is that the spring is too big for the thing. It doesn't do anything at all, its jutsa spring and ball crammed into a piece of metal. You need to cut off a coil or 2 then stretch it.