www.imoc.co.uk Forum Index
 AlbumAlbum CalendarCalendar FAQFAQ SearchSearch MemberlistMemberlist Legal NoticeLegal Notice IMOC 1/4 Mile1/4 Mile Table Knowledge BaseKnowledge Base   RegisterRegister 
 GarageCommittee GarageGarage  SubscriptionPremium Membership  ProfileProfile   Log in to check private messagesLog in to check private messages   Log inLog in 
Calendar 
[Mk2] [Turbo] Rev 2 Turbo not holding boost to redline

 
Post new topic   Reply to topic       www.imoc.co.uk Forum Index -> MR2 MK2 1990 - 1999 NA & Turbo -> Modifications
View previous topic :: View next topic  
Author Message
manuelk1
Premium Member



Joined: 13 Jul 2015
Posts: 70

Feedback Score: 1



PostPosted: Thu Mar 02, 2017 12:45 pm    Post subject: [Mk2] [Turbo] Rev 2 Turbo not holding boost to redline Reply with quote Reply with quote including images

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
Back to top
User is offline 
markstevieandmads




Joined: 05 Aug 2013
Posts: 1700
Location: Swindon, Wilts
Feedback Score: 4

1993 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Thu Mar 02, 2017 2:42 pm    Post subject: Reply with quote Reply with quote including images

Are u sure its a ct20b? Get a pic up
Back to top
User is offline 
manuelk1
Premium Member



Joined: 13 Jul 2015
Posts: 70

Feedback Score: 1



PostPosted: Thu Mar 02, 2017 2:48 pm    Post subject: Reply with quote Reply with quote including images

Not got a pic but 100% it's a ct20b mate
Back to top
User is offline 
markstevieandmads




Joined: 05 Aug 2013
Posts: 1700
Location: Swindon, Wilts
Feedback Score: 4

1993 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Thu Mar 02, 2017 3:09 pm    Post subject: Reply with quote Reply with quote including images

Id say boost leak then
Back to top
User is offline 
manuelk1
Premium Member



Joined: 13 Jul 2015
Posts: 70

Feedback Score: 1



PostPosted: Thu Mar 02, 2017 3:21 pm    Post subject: Reply with quote Reply with quote including images

Will pressure check the system and report back, cheers buddy [thumleft]
Back to top
User is offline 
markstevieandmads




Joined: 05 Aug 2013
Posts: 1700
Location: Swindon, Wilts
Feedback Score: 4

1993 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Thu Mar 02, 2017 3:35 pm    Post subject: Reply with quote Reply with quote including images

Also check the wastegate isnt fouling on the decat
Back to top
User is offline 
manuelk1
Premium Member



Joined: 13 Jul 2015
Posts: 70

Feedback Score: 1



PostPosted: Mon Mar 13, 2017 11:44 am    Post subject: Reply with quote Reply with quote including images

no boost leak found. waste gate operating as it should and isn't fowling the down pipe!
Back to top
User is offline 
cooper514
Premium Member



Joined: 03 Jun 2013
Posts: 97

Feedback Score: 1

1995 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Sat Mar 18, 2017 9:31 am    Post subject: Reply with quote Reply with quote including images

Turn it up a bit more it will spike and come back down
Back to top
User is offline 
robbie_742003
Premium Member



Joined: 15 Dec 2004
Posts: 1134
Location: Midlands
Feedback Score: 11

1996 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Sun Mar 19, 2017 8:38 pm    Post subject: Reply with quote Reply with quote including images

It's not holding for a reason, I'd investigate further before upping the boost, try to get it in somewhere. Any fault codes?
Back to top
User is offline 
manuelk1
Premium Member



Joined: 13 Jul 2015
Posts: 70

Feedback Score: 1



PostPosted: Mon Mar 20, 2017 6:12 pm    Post subject: Reply with quote Reply with quote including images

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?
Back to top
User is offline 
robbie_742003
Premium Member



Joined: 15 Dec 2004
Posts: 1134
Location: Midlands
Feedback Score: 11

1996 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Mon Mar 20, 2017 7:55 pm    Post subject: Reply with quote Reply with quote including images

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
Back to top
User is offline 
manuelk1
Premium Member



Joined: 13 Jul 2015
Posts: 70

Feedback Score: 1



PostPosted: Mon Mar 20, 2017 9:38 pm    Post subject: Reply with quote Reply with quote including images

It's a Mumsby developments mbc. It's set to 1 bar mate but as I say over boots at high speed in 5th.
Back to top
User is offline 
Display posts from previous:   
Post new topic   Reply to topic       www.imoc.co.uk Forum Index -> MR2 MK2 1990 - 1999 NA & Turbo -> Modifications All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group