Hi guys I wonder if someone can help.
I've got a rev 2 turbo with a CT20B turbo, de-cat, hks fcd, manual boost controller which is set at 1.0 bar of boost. However when under full throttle it hits 1 bar of boost but doesnt hold to the red line it dies down to between 0.8 and 0.9 bar. Any ideas why its not holding 1 bar to redline?
Cheers
Kieran
[Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
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Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
Are u sure its a ct20b? Get a pic up
Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
Not got a pic but 100% it's a ct20b mate
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Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
Id say boost leak then
Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
Will pressure check the system and report back, cheers buddy
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Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
Also check the wastegate isnt fouling on the decat
Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
no boost leak found. waste gate operating as it should and isn't fowling the down pipe!
Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
Turn it up a bit more it will spike and come back down
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Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
It's not holding for a reason, I'd investigate further before upping the boost, try to get it in somewhere. Any fault codes?
Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
No fault codes atall found, it also over boosts past 1.2 bar at high speed when applying the throttle in 5th gear which leads me to believe it could be the mbc which isnt working correctly?
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Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
manuelk1 wrote:No fault codes atall found, it also over boosts past 1.2 bar at high speed when applying the throttle in 5th gear which leads me to believe it could be the mbc which isnt working correctly?
Its possible, what boost controller are you using? 17.5 PSI is too much without cooling mods and other supporting mods and could result in damage mate.
Rob
Re: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline
It's a Mumsby developments mbc. It's set to 1 bar mate but as I say over boots at high speed in 5th.