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turbo k series
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dazbooker
Posted 5/2/2011 12:45 PM (#589726 - in reply to #474141)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley

got the cams all set up with the verniers 

inlet needed advancing very slightley to gain full lift

and exhaust needed retarding very slightley to gain full lift

heres some pics of the timing disc set to tdc before i adjusted the verniers

the timing belt on and the new water outlet elbow fitted





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dazbooker
Posted 6/2/2011 1:48 PM (#589879 - in reply to #474141)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley

been busy today got the rocker cover on

painted some parts before fitting on the engine

and fitted the lower manifol and fuel rail





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dazbooker
Posted 7/2/2011 3:28 PM (#590171 - in reply to #474141)
Subject: RE: turbo k series
Expert

Posts: 1265
10001001002525
Location: barnsley
painted my old injector clips as couldnt get new

and cleaned upper half of inlet manifold and fitted to lower half

need to remove sump from old engine to get powder coated and then i can fit it to new engine

looks like a weekend job



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Attachments 001.jpg (80KB - 61 downloads)
Attachments 002.jpg (93KB - 66 downloads)
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Attachments 005.jpg (98KB - 64 downloads)
djwilma
Posted 8/2/2011 10:15 AM (#590266 - in reply to #474141)
Subject: RE: turbo k series


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Location: Bournemouth
Looking luuurvely. when you planning on fitting it ?
dazbooker
Posted 8/2/2011 12:15 PM (#590300 - in reply to #590266)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley
djwilma - 8/2/2011 6:15 PM

Looking luuurvely. when you planning on fitting it ?


hopefully this weekend
Turley_vvc
Posted 8/2/2011 1:47 PM (#590350 - in reply to #474141)
Subject: RE: turbo k series




Posts: 2794
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Location: Tamworth/Measham
excuse me french but that is fooking amazin daz,wona build my engine back up for me
dazbooker
Posted 8/2/2011 1:56 PM (#590352 - in reply to #590350)
Subject: RE: turbo k series
Expert

Posts: 1265
10001001002525
Location: barnsley
Turley_vvc - 8/2/2011 9:47 PM

excuse me french but that is fooking amazin daz,wona build my engine back up for me


can do mate get the parts and ill give you an hand
munday
Posted 8/2/2011 2:00 PM (#590353 - in reply to #589679)
Subject: RE: turbo k series


Expert

Posts: 5629
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Location: Letchworth/Basildon
dazbooker - 5/2/2011 6:26 PM

munday - 5/2/2011 9:53 AM
dazbooker - 5/2/2011 2:08 PM

just worked compression ratio works out at 8.257 plus or minus 0.500 to 1

means i can run more boost over standard ratio 9.200 to 1 plus or minus 0.500 to 1

With that sort of CR you can run some healthy boost through that May seem a little more sluggish off boost, but as its in a metro you will hardly notice it

what sort of boost pressure do you reckon i coul run with this cr



Well if it were mine (I wish) depending on the turb being used I would run up to 18psi at first and see how it was on a stock turbo no more than 15psi, with a bigger turbo and the same boost you could have more power safely rather than running extra boost on the stock gt20. But it's only my opinion, others may disagree

Really nice journal and love the work going into this
munday
Posted 8/2/2011 2:01 PM (#590354 - in reply to #589679)
Subject: RE: turbo k series


Expert

Posts: 5629
500050010025
Location: Letchworth/Basildon
dazbooker - 5/2/2011 6:26 PM

munday - 5/2/2011 9:53 AM
dazbooker - 5/2/2011 2:08 PM

just worked compression ratio works out at 8.257 plus or minus 0.500 to 1

means i can run more boost over standard ratio 9.200 to 1 plus or minus 0.500 to 1

With that sort of CR you can run some healthy boost through that May seem a little more sluggish off boost, but as its in a metro you will hardly notice it

what sort of boost pressure do you reckon i coul run with this cr



Well if it were mine (I wish) depending on the turb being used I would run up to 18psi at first and see how it was on a stock turbo no more than 15psi, with a bigger turbo and the same boost you could have more power safely rather than running extra boost on the stock gt20. But it's only my opinion, others may disagree

Really nice journal and love the work going into this
Turley_vvc
Posted 8/2/2011 2:07 PM (#590357 - in reply to #590352)
Subject: RE: turbo k series




Posts: 2794
2000500100100252525
Location: Tamworth/Measham
dazbooker - 8/2/2011 1:56 PM

Turley_vvc - 8/2/2011 9:47 PM

excuse me french but that is fooking amazin daz,wona build my engine back up for me


can do mate get the parts and ill give you an hand


Cheers but how would that work lol
dazbooker
Posted 8/2/2011 2:27 PM (#590370 - in reply to #590357)
Subject: RE: turbo k series
Expert

Posts: 1265
10001001002525
Location: barnsley
Turley_vvc - 8/2/2011 10:07 PM

dazbooker - 8/2/2011 1:56 PM

Turley_vvc - 8/2/2011 9:47 PM

excuse me french but that is fooking amazin daz,wona build my engine back up for me


can do mate get the parts and ill give you an hand


Cheers but how would that work lol


if you really want it doing you would have to drop it up to me with all your bits and ill build it for you
dazbooker
Posted 8/2/2011 2:31 PM (#590375 - in reply to #590353)
Subject: RE: turbo k series
Expert

Posts: 1265
10001001002525
Location: barnsley
munday - 8/2/2011 10:00 PM

dazbooker - 5/2/2011 6:26 PM

munday - 5/2/2011 9:53 AM
dazbooker - 5/2/2011 2:08 PM

just worked compression ratio works out at 8.257 plus or minus 0.500 to 1

means i can run more boost over standard ratio 9.200 to 1 plus or minus 0.500 to 1

With that sort of CR you can run some healthy boost through that May seem a little more sluggish off boost, but as its in a metro you will hardly notice it

what sort of boost pressure do you reckon i coul run with this cr



Well if it were mine (I wish) depending on the turb being used I would run up to 18psi at first and see how it was on a stock turbo no more than 15psi, with a bigger turbo and the same boost you could have more power safely rather than running extra boost on the stock gt20. But it's only my opinion, others may disagree

Really nice journal and love the work going into this


going to have to use the gt20 turbo as theres no room for a bigger turbo

standard pressure is about 10 psi at the moment was running 15 psi but didnt feel like it was safe on standard rods and pistons so maybe i could try that first
munday
Posted 9/2/2011 2:10 AM (#590417 - in reply to #474141)
Subject: RE: turbo k series


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Posts: 5629
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Location: Letchworth/Basildon
Yeah wouldnt feel too comfortable running any more than that. I would worry about inlet temps but you can moniter these cant you? So thats great!

With a gt28 you could run 15psi but be in a whole new league of power. Proably not what you're aiming for though
Roverdose
Posted 9/2/2011 11:40 AM (#590538 - in reply to #474141)
Subject: RE: turbo k series
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the c/r is fine for loads of boost, but id be concerned about the deck height.

Drew
djwilma
Posted 9/2/2011 11:54 AM (#590540 - in reply to #590417)
Subject: RE: turbo k series


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Posts: 2812
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Location: Bournemouth
munday - 8/2/2011 10:10 AM
With a gt28 you could run 15psi but be in a whole new league of power. Proably not what you're aiming for though


Here we go again
dazbooker
Posted 9/2/2011 12:52 PM (#590549 - in reply to #590538)
Subject: RE: turbo k series
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Posts: 1265
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Location: barnsley
Roverdose - 9/2/2011 7:40 PM

the c/r is fine for loads of boost, but id be concerned about the deck height.


Drew

what concerns you about the deck height drew

the piston height is 0.33mm above the liner and the gasket height comressed is 1.25mm so can see a problem really

as the engine turns over no problem and i cant see anything altering much if anything when its running

Edited by dazbooker 9/2/2011 2:35 PM
muzza
Posted 9/2/2011 1:44 PM (#590586 - in reply to #474141)
Subject: RE: turbo k series


Nutta With An Orange Grille


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Location: Who put that pit there keep falling down :(
correct me if im wrong but the gt20 gt28 etc doesent have much to do with the turbo size its a measurement of shaft size for example the compressor on the gt2052ls as fitted to the r75t uses almost exactly the same size compressor as the TB2555 (gt25) fitted on the rover 220 turbo
djwilma
Posted 9/2/2011 3:24 PM (#590661 - in reply to #590586)
Subject: RE: turbo k series


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Posts: 2812
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Location: Bournemouth
muzza - 8/2/2011 9:44 PM

correct me if im wrong but the gt20 gt28 etc doesent have much to do with the turbo size its a measurement of shaft size for example the compressor on the gt2052ls as fitted to the r75t uses almost exactly the same size compressor as the TB2555 (gt25) fitted on the rover 220 turbo


This explains it best

http://www.turbobygarrett.com/turbobygarrett/tech_center/gt_basics.html

http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/turbo_comparison_sheet.htm

In essence you can have a GT20 and a GT28 with the same or similar size compressor wheel, but the frame of a GT28 is bigger
dazbooker
Posted 9/2/2011 3:31 PM (#590663 - in reply to #590661)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley
djwilma - 9/2/2011 11:24 PM

muzza - 8/2/2011 9:44 PM

correct me if im wrong but the gt20 gt28 etc doesent have much to do with the turbo size its a measurement of shaft size for example the compressor on the gt2052ls as fitted to the r75t uses almost exactly the same size compressor as the TB2555 (gt25) fitted on the rover 220 turbo


This explains it best


http://www.turbobygarrett.com/turbobygarrett/tech_center/gt_basics.html

http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/turbo_comparison_sheet.htm

In essence you can have a GT20 and a GT28 with the same or similar size compressor wheel, but the frame of a GT28 is bigger


yeh looked at this myself
just the bodys bigger to allow more air in to the turbo
cant fit this though notenough room

think the one i have should do fine
Roverdose
Posted 9/2/2011 10:31 PM (#590675 - in reply to #474141)
Subject: RE: turbo k series
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Posts: 444
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you might be able to fit a t28 as the std recirc valve is quite big, so without that could allow a larger compressor housing.

as for the deck height, the piston is quite close to the head, that 'may' cause a problem. although its a T so slightly different i found that high boost and low deck height dont mix too well.

Drew
Access_denied
Posted 10/2/2011 11:16 AM (#590844 - in reply to #590417)
Subject: RE: turbo k series


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Location: Guildford
munday - 9/2/2011 8:10 AM

Yeah wouldnt feel too comfortable running any more than that. I would worry about inlet temps but you can moniter these cant you? So thats great!

With a gt28 you could run 15psi but be in a whole new league of power. Proably not what you're aiming for though


I dont get this, if 2 turbo's are both making 15psi at 4500rpm for example how will one make more power than the other assuming 15 psi is within the efficiency range of both? I can see the bigger turbo making the same boost at higher rpms but if the small turbo is not outside its comfort zone in the RPM range you require why would a bigger turbo make more power?
munday
Posted 10/2/2011 11:52 AM (#590857 - in reply to #590844)
Subject: RE: turbo k series


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Posts: 5629
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Location: Letchworth/Basildon
Access_denied - 10/2/2011 7:16 PM

munday - 9/2/2011 8:10 AM

Yeah wouldnt feel too comfortable running any more than that. I would worry about inlet temps but you can moniter these cant you? So thats great!

With a gt28 you could run 15psi but be in a whole new league of power. Proably not what you're aiming for though


I dont get this, if 2 turbo's are both making 15psi at 4500rpm for example how will one make more power than the other assuming 15 psi is within the efficiency range of both? I can see the bigger turbo making the same boost at higher rpms but if the small turbo is not outside its comfort zone in the RPM range you require why would a bigger turbo make more power?


Its because the bigger turbo will flow more air at a given pressure than a smaller one.

This is kinda an extreme example http://www.youtube.com/watch?v=qrb2sBGI8Sk
Access_denied
Posted 10/2/2011 11:57 AM (#590860 - in reply to #590857)
Subject: RE: turbo k series


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Posts: 6619
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Location: Guildford
munday - 10/2/2011 5:52 PM

Access_denied - 10/2/2011 7:16 PM

munday - 9/2/2011 8:10 AM

Yeah wouldnt feel too comfortable running any more than that. I would worry about inlet temps but you can moniter these cant you? So thats great!

With a gt28 you could run 15psi but be in a whole new league of power. Proably not what you're aiming for though


I dont get this, if 2 turbo's are both making 15psi at 4500rpm for example how will one make more power than the other assuming 15 psi is within the efficiency range of both? I can see the bigger turbo making the same boost at higher rpms but if the small turbo is not outside its comfort zone in the RPM range you require why would a bigger turbo make more power?


Its because the bigger turbo will flow more air at a given pressure than a smaller one.

This is kinda an extreme example http://www.youtube.com/watch?v=qrb2sBGI8Sk


That does not make sense, boyles law says that air pressure and mass are intrisicly linked so if the pressure is the same, the volume of the container is the same (same engine) and the air temperature is the same then the mass of air is the same.

You have to run higher rpm's to run lower boost so its all a trade off, make an engine capable of running boost or high RPMs or both if you have deep pockets.

Edited by Access_denied 10/2/2011 12:06 PM
munday
Posted 10/2/2011 12:25 PM (#590869 - in reply to #474141)
Subject: RE: turbo k series


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Location: Letchworth/Basildon
It is really due to an increase in VE. You end up with less backpressure because the bigger turbos turbine will flow more and the wastegate will open sooner and wider because of the much lower rpm the turbo needs to spin at to create the desired boost.

With the reduced backpressure the engines demand for air increases.

Oh and you'll undoubtedly get lower pre intercooler temps.

Obviously you are looking for a balance between the response and the flow capability of the turbo
dazbooker
Posted 10/2/2011 12:29 PM (#590872 - in reply to #474141)
Subject: RE: turbo k series
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Posts: 1265
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Location: barnsley
all this is good reading guys but at the end of the day theres no room to fit a bigger turbo so im stuck with the one ive got
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