| Page: |
| Home > Introduce Yourself > Teaching an old dog new tricks | |||||||
|
80 Posts Member #: 4178 Advanced Member Chesterfield |
26th Oct, 2008 at 12:59:59pm
Hello folks, I guess that at my age I should not be building turbo a mini, but hey, it's better than sitting at home with the missus.
I am nobody, nobody's perfect. Therefore I am perfect |
||||||
|
64 Posts Member #: 2244 Advanced Member mulbarton, norwich nr14 8gs |
26th Oct, 2008 at 01:18:53pm
2 bar??? what sort of spec is your engine? |
||||||
|
80 Posts Member #: 4178 Advanced Member Chesterfield |
26th Oct, 2008 at 01:33:35pm
I bought the car complete and i was told it is a standard metty turbo it runs well apart from a problem ticking over but his may be due to it has 6mm fuel lines as opposed to 8mm. I am trying to find a boost gauge that reads in psi as bar means shit to me I am nobody, nobody's perfect. Therefore I am perfect |
||||||
|
4018 Posts Member #: 1757 Back to Fucking Tool status Swindon |
26th Oct, 2008 at 01:54:11pm
2 bar on a standard metro turbo engine... are you a wizzard! Drives
|
||||||
 4559 Posts Member #: 786 Post Whore Bermingum |
26th Oct, 2008 at 02:05:07pm
Hi,
Edited by Bat on 26th Oct, 2008. VEMs Authorised Installer / Re-seller. K head kits now available!
|
||||||
|
80 Posts Member #: 4178 Advanced Member Chesterfield |
26th Oct, 2008 at 02:05:40pm
look i asked a question to see if the dump valve was working right, i guess i should have gone somewhere where someone could offer advice instead of ridicule, i have no idea as to the set up as i bought it complete, so before i ran it proper i thought i'd get some advice from the people in the know. I'm not on here for confrontation and i'm not on here to boast about mines got more boost than yours. i just wanted a question answered that's all, if someone can do this i would be grateful, i take on board that the 2 bar thing is inaccurate and as soon as i can get a new gauge that reads in psi i will do. but firstly I need to know if the dump valve i've got is working as it should in regard to the rpm.
I am nobody, nobody's perfect. Therefore I am perfect |
||||||
|
80 Posts Member #: 4178 Advanced Member Chesterfield |
26th Oct, 2008 at 02:15:29pm
Thanks bat, The vacuum pipe from the valve is connected to the inlet where the servo connects, is this right? I am nobody, nobody's perfect. Therefore I am perfect |
||||||
|
80 Posts Member #: 4178 Advanced Member Chesterfield |
26th Oct, 2008 at 02:31:16pm
Sorry for my intolerance and i have now looked a little more closely and the boost gauge infact reads it's boosting at .2 bar.
I am nobody, nobody's perfect. Therefore I am perfect |
||||||
 3692 Posts Member #: 1833 Formally mini_majic Auckland, New Zealand |
26th Oct, 2008 at 02:49:09pm
your dumop valve should remain closed untill your butterfly closes and your manifold see's vacuum. the vacum then opens yours dump valve to release the boost pressure that otherwise would be hitting the butterfly and not be able to go anywhere which causes your compressor(intake side of the turbo) to stall which increases lag on gear changes and also increases wear on the turbo.
|
||||||
|
2496 Posts Member #: 1954 Post Whore Luton Bedfordshire |
27th Oct, 2008 at 11:11:18am
On 26th Oct, 2008 roguesaga said: That sounds a little odd to me your dump valve should remain closed until you take your foot off of the accelerator. The differential pressure caused by the vacume created in the inlet manifold overcomes the spring pressure holding the piston or diaphram down lifts it off of its seat thus allowing the excess boost pressure to be vented. When you apply more throttle you loose the vacume due to the butterfly opening and the spring pressure closes the dump valve.
The problem i'm having is the Bailey valve that i inherited stays open and will only close at about 3500 then at 5000 it'll open again. Many thanks As far as I am aware dumpvalve opening and closing is not RPM controled. What you seem to be describing is the operation of the waste gate control solenoid valve. Does it act like this in all gears? as your boost will increase at different rates due to the amount of gas produced depending on engine loading. Own the day
|
||||||
 6549 Posts Member #: 1149 #1 Basshunter Fan Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes! |
27th Oct, 2008 at 11:24:15am
2 Bar! Are you sure you havent got the Boost Gauge plumbed between the Turbo and the Actuator? 1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.
|
||||||
 249 Posts Member #: 513 Senior Member Sheffield |
27th Oct, 2008 at 11:27:28am
If the engine isn't under load the turbo won't be producing any boost so you'll see a vacuum in the inlet manifold, this will open the dump valve.
|
||||||
|
2496 Posts Member #: 1954 Post Whore Luton Bedfordshire |
27th Oct, 2008 at 11:27:43am
On 26th Oct, 2008 roguesaga said: Your running just under 3psi of boost which is nothing to be honest. A little looking has suggested you should have fitted a DV24 or DV34 either way there is no suggestion that it should be acting the way it is. Post up a detailed description of how it is fitted and where the small vacume pipe is plumed into.
Sorry for my intolerance and i have now looked a little more closely and the boost gauge infact reads it's boosting at .2 bar. Egg firmley on mi face One last question has the original dump valve been removed and plugged. Own the day
|
||||||
|
2496 Posts Member #: 1954 Post Whore Luton Bedfordshire |
27th Oct, 2008 at 11:35:55am
On 27th Oct, 2008 andygardner said: Got my dump valve from Mini speed and that had a restriction in the vacume pipe which totaly messed up the operation of the dump valve! ended up drilling it out with an eighth drill. I have noticed mine doing the same since but its a minute movement and you will miss it if you blink. But you make a valid point about the unfiltered air, how about fitting a foam band around the vent holes, a sort of improvised foam filter? If the engine isn't under load the turbo won't be producing any boost so you'll see a vacuum in the inlet manifold, this will open the dump valve. I've observed this happening with mine, can't see it being ideal as you're going to be taking in unfiltered air? I was going to try putting a restriction in the vacuum side of the DV when I get round to it, not sure if that will work though. 
Edited by Mr Joshua on 27th Oct, 2008. Own the day
|
||||||
 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
27th Oct, 2008 at 11:42:57am
On 27th Oct, 2008 MikeRace said:
2 Bar! Are you sure you havent got the Boost Gauge plumbed between the Turbo and the Actuator? Keep up mike! Firstly all dump valves will be open at tickover, and yes this means sucking in unfiltered air. Then as you get boost it will close. Generally this will be at a lower RPM than 3k. However, to be looking at the valve, you must have the bonnet open and not be moving. If so, you will be making very little boost and I wouldn't expect the valve to close much below 3k. It does seem wierd that it opens again at 5k. Again though, is this a stationary test? What happens at 5k when you drive it? does it dump and you lose all boost? Finally, your boost is lower than standard, so worth investigating. it should run around 0.5bar max. 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. |
||||||
|
2496 Posts Member #: 1954 Post Whore Luton Bedfordshire |
27th Oct, 2008 at 12:11:32pm
Edit:- sorry Andy just realised I repeated exactly what you said. Edited by Mr Joshua on 28th Oct, 2008. Own the day
|
||||||
|
4559 Posts Member #: 786 Post Whore Bermingum |
27th Oct, 2008 at 01:54:47pm
Hi,
Edited by Bat on 27th Oct, 2008. VEMs Authorised Installer / Re-seller. K head kits now available!
|
||||||
 2500 Posts Member #: 648 Post Whore Northern Ireland (ex AUS) |
27th Oct, 2008 at 02:17:45pm
On 27th Oct, 2008 Mr Joshua said:
But you make a valid point about the unfiltered air, how about fitting a foam band around the vent holes, a sort of improvised foam filter? Like this: http://www.forgemotorsport.co.uk/content.a...roduct=FMDVF003 On 7th Nov, 2008 Nic said:
naeJ m !!!!!!sdrawkcab si gnihtyreve ?droabyekym ot deneppah sah tahw ayhwdd |
||||||
|
2496 Posts Member #: 1954 Post Whore Luton Bedfordshire |
27th Oct, 2008 at 02:22:48pm
damn the brain leaches are out to get me arghhhh! Own the day
|
||||||
 6274 Posts Member #: 509 Post Whore Isle of Man |
27th Oct, 2008 at 05:45:38pm
mate, no ones trying to get your back up, no need to be so thin skinned
"Turbo's make torque, and torque makes fun"
|
||||||
|
2496 Posts Member #: 1954 Post Whore Luton Bedfordshire |
28th Oct, 2008 at 09:38:46am
On 26th Oct, 2008 roguesaga said: Eer he did recant his minor rant and he kinda had a point.
Sorry for my intolerance and i have now looked a little more closely and the boost gauge infact reads it's boosting at .2 bar. Egg firmley on mi face Own the day
|
||||||
| Home > Introduce Yourself > Teaching an old dog new tricks | |||||||
|
|||||||
| Page: |