Donations towards server fund so far this month.

 
£0.00 / £100.00 per month
Page:
Home > Help Needed / General Tech Chat > No boost

Ryan22lgm

4 Posts
Member #: 11857
Junior Member

My turbo set up is all fitted and engine running well. Booked the car in to be rolling roaded to be told itís not boosting at all until itís basically to late high up the Rev range. I had only driven the car gently before hand as Iím very cautious of running lean/rich. Standard metro t3 setup with rebuilt carb.
Triple checked all vacuum lines
Checked wastegate pre-load set about 6mm
Bleed valve piped in correctly as per diagram.
Chap at rolling road checked for boost leaks found one and sorted this for me.
He seemed to think I could have an issue with the wastegate not shutting correctly. Is there anything else I should check before I start stripping it right back down???


wil_h

User Avatar

9237 Posts
Member #: 123
Post Whore

Betwix Harrogate and York

How about the poppet valve on the plenum not being fitted or not sealing?

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Turbo Phil

User Avatar

4393 Posts
Member #: 20
My sister is so fit I won't show anyone her picture

Lake District

The actuator could be weak allowing the wastegate to creep, hence the boost only at high RPM. Or the WG is sticking open. If you disconnect the actuator from the WG does the WG arm move smoothly/freely ?

Phil.

WWW.TURBO-MINI.COM


stevieturbo

3376 Posts
Member #: 655
Post Whore

Northern Ireland

Shouldnt take long to check the actuator etc to see if it is closing/closed ok.

Is it ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Ryan22lgm

4 Posts
Member #: 11857
Junior Member

Cheers Guys havenít had a chance to try anything yet broke my ribs on the mx bike!!!
The popper valve has been blanked with modified plenum chamber for intercooler pipe takeoff. New gasket put on when carb rebuilt.
I have tried running up the road with the actuator vacuum line disconnected this made no difference. Should I swap it out for a standard actuator as the one fitted is a red aftermarket one? Or should I disconnect it altogether and try to hold the wastegate shut with cable ties to see if I get boost that way?

Thanks again

Edited by Ryan22lgm on 14th Jun, 2019.


stevieturbo

3376 Posts
Member #: 655
Post Whore

Northern Ireland

No, as already said you need to check the w/g is actually closed.

A decent start would be about half a hole tension on the rod

Edited by stevieturbo on 16th Jun, 2019.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Home > Help Needed / General Tech Chat > No boost
Users viewing this thread: none. (+ 1 Guests)  
To post messages you must be logged in!
Username: Password:
Page: