Page: |
Home > Help Needed / General Tech Chat > No boost | |||||||
13 Posts Member #: 11857 Member |
8th Jun, 2019 at 03:19:39pm
My turbo set up is all fitted and engine running well. Booked the car in to be rolling roaded to be told it’s not boosting at all until it’s basically to late high up the Rev range. I had only driven the car gently before hand as I’m very cautious of running lean/rich. Standard metro t3 setup with rebuilt carb.
|
||||||
9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
10th Jun, 2019 at 10:55:12am
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
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. |
||||||
4619 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
10th Jun, 2019 at 11:30:17pm
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 ?
|
||||||
3569 Posts Member #: 655 Post Whore Northern Ireland |
11th Jun, 2019 at 12:07:08am
Shouldnt take long to check the actuator etc to see if it is closing/closed ok.
9.85 @ 145mph
|
||||||
13 Posts Member #: 11857 Member |
14th Jun, 2019 at 11:55:13pm
Cheers Guys haven’t had a chance to try anything yet broke my ribs on the mx bike!!!
Edited by Ryan22lgm on 14th Jun, 2019. |
||||||
3569 Posts Member #: 655 Post Whore Northern Ireland |
16th Jun, 2019 at 11:47:31am
No, as already said you need to check the w/g is actually closed.
Edited by stevieturbo on 16th Jun, 2019. 9.85 @ 145mph
|
||||||
13 Posts Member #: 11857 Member |
20th Jun, 2019 at 10:34:17pm
Had a little play with the car tonight. Took carb off and checked the preload on actuator seemed to be around 3-5mm so upped it to about 8mm. Took it for a test drive and seems to be ‘boosting’ but still doesn’t have that turbo car feel. Seems to come in too high up the Rev range. I don’t have a tachometer so can only judge by how loud it is in the car 🤣 |
||||||
806 Posts Member #: 989 Post Whore North Yorkshire |
23rd Jun, 2019 at 10:13:25am
Boost from an old school T3 should have arrived by 3000rpm and be obvious, as it isn't very progressive.
|
||||||
13 Posts Member #: 11857 Member |
6th Jul, 2019 at 08:42:02am
I do have a boost gauge fitted and it was showing boost but as I say when it’s far to late.
Edited by Ryan22lgm on 6th Jul, 2019. |
||||||
3569 Posts Member #: 655 Post Whore Northern Ireland |
8th Jul, 2019 at 06:47:48pm
There isnt supposed to be a gasket there, nor any other crap.
9.85 @ 145mph
|
||||||
4619 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
8th Jul, 2019 at 07:14:50pm
As Stevie says there’s no gasket or anything else to seal the wastegate flap against the turbine housing, it simply relies on the pull of the actuator to hold it against the machined surface in the housing.
|
||||||
13 Posts Member #: 11857 Member |
9th Jul, 2019 at 11:36:48pm
So took the car apart again tonight and think I have sussed out the problem! Seems like the actuator has far to much play in it preventing a full seal over the hole (see pictures) You can also see the sealer I used which I will remove. Is there a way to tighten up the actuator/flapper rod? Or do I need to source a new part? Seems like mostly up and down play not side to side. |
||||||
2619 Posts Member #: 1246 Post Whore Lowestoft, Suffolk. |
10th Jul, 2019 at 03:54:21pm
. Edited by shane on 10th Jul, 2019. |
||||||
3569 Posts Member #: 655 Post Whore Northern Ireland |
12th Jul, 2019 at 12:32:43am
What do you mean it has far too much play ?
9.85 @ 145mph
|
||||||
9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
12th Jul, 2019 at 06:18:45pm
It looks fooked to me too.
Fastest 998 mini in the world? 13.05 1/4 mile 106mph
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. |
||||||
13 Posts Member #: 11857 Member |
12th Jul, 2019 at 11:58:16pm
On 12th Jul, 2019 stevieturbo said:
What do you mean it has far too much play ? It's a simple flap, and you were asked ages ago to ensure it was actually closed, and ideally with maybe half a hole pre-load on the actuator arm. Which from the black marks....seems it was nowhere near closed, and doesnt even look as if it is aligned over the hole ? Is something fucked with the arm/flap ? I fully understand how the flap should work and reset the preload several times before stripping it apart. As I just said the shaft has to much play up and down as shown in the black marks. This is allowing it to leak at the top. I am not going to scrap my turbo just because this part is not available. I plan on removing the weld from the top of the shaft then moving it up and re-welding to cure the up and down play. This will then make a full seal over the hole and solve the problem. I want to say thanks to everyone that has commented nothing has been ignored! |
||||||
3569 Posts Member #: 655 Post Whore Northern Ireland |
13th Jul, 2019 at 10:38:48am
Anything is fixable, and many parts are available.
9.85 @ 145mph
|
||||||
13 Posts Member #: 11857 Member |
21st Sep, 2019 at 12:14:10am
So finally managed to figure out the cause of this!!! Bought another turbo from phil and as soon as I took the wastegate housing off I started to see differences.
|
||||||
3569 Posts Member #: 655 Post Whore Northern Ireland |
22nd Sep, 2019 at 10:28:34pm
Don't know...cant see it from here. 9.85 @ 145mph
|
||||||
Site Admin 15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
23rd Sep, 2019 at 09:24:00am
On 21st Sep, 2019 Ryan22lgm said:
So finally managed to figure out the cause of this!!! Bought another turbo from phil and as soon as I took the wastegate housing off I started to see differences. The turbo fitted to my car I had bought in a kit from eBay described as removed from a running mini. This was lies!!! The hot side of the turbo was completely the wrong size inside so the core was just sat in a void. Wastegate hole was lower down so poppet valve did not cover. So I have changed this along with the cover took it for a test drive tonight and bloody hell I have boost!!! 🤪 What other vehicle could this hot side be from as it’s clear that it’s not made for the mini turbo core? Well done finding it. Frustrating but often can be the way with second hand unknown bits. A photo would help but the exhaust housing is metro specific, it could be from any other larger T3.
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
||||||
13 Posts Member #: 11857 Member |
23rd Sep, 2019 at 10:28:53am
Will definitely get you guys some pictures. It fits on the metro manifold same as the new one I fitted. Pain in the ass!!! |
||||||
Home > Help Needed / General Tech Chat > No boost | |||||||
|
Page: |