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turbo k series
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Access_denied
Posted 10/2/2011 12:38 PM (#590878 - in reply to #590869)
Subject: RE: turbo k series


Expert

Posts: 6619
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Location: Guildford
munday - 10/2/2011 6:25 PM

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


But at 3.5krpm and 15psi both engines will be the same or the small turbo will be better due to spooling faster, same container volume same pressure so you will only yeild more power by going for more revs which is engine N/A or turbo 101. Making more power with higher revs always needs a bigger turbo so saying a bigger turbo gives more power because it gives more air at a lower boost is rubbish, it gives more air at higher rpms at lower boost or the same air at the same rpms and the same boost.
dazbooker
Posted 10/2/2011 12:59 PM (#590889 - in reply to #474141)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley		managed to get a few more stuff fitted to the engine today

thanks to matt parker i got a new oil feed pipe and painted it now fitted

new coolant sensors and a new oil pressure sensor

oh and the right length stailnless bolts in the inlet manifold



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dazbooker
Posted 11/2/2011 3:33 PM (#591184 - in reply to #474141)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley		off to pick the freshly powder coated sump up tomorrow
will post some pics when i have it
then hopefully when fitted to engine can start and remove old engine
Roverdose
Posted 11/2/2011 10:26 PM (#591207 - in reply to #590878)
Subject: RE: turbo k series
Veteran

Posts: 444
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Access_denied - 10/2/2011 6:38 PM
But at 3.5krpm and 15psi both engines will be the same or the small turbo will be better due to spooling faster


how can you say the smaller one would be better but think the larger one cant be?

munday is on about the efficiency of the engine, if you stick a 1" exhaust on it it wont be very good, go with a 3" and it will be more efficient. same principal with turbo's. if the larger turbine can flow the same pressure at the same revs, the engine will be more efficient so make more power.

where did you get the pistons daz?

Drew

Edited by Roverdose 12/2/2011 4:23 AM
dazbooker
Posted 12/2/2011 11:56 AM (#591285 - in reply to #474141)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley		got the sump back from powder coaters

fitted the oil sump baffles to the sump and then the sump to the engine

also had the engine mounting bracket coated aswell and fitted it to the sump





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dazbooker
Posted 12/2/2011 12:00 PM (#591287 - in reply to #591184)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley		-

Edited by dazbooker 12/2/2011 12:05 PM
Turley_vvc
Posted 12/2/2011 12:51 PM (#591296 - in reply to #474141)
Subject: RE: turbo k series




Posts: 2794
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Location: Tamworth/Measham		Daz juat been looking at your engine,what engine paint did you use to get that finished as i want that finish on mine?
dazbooker
Posted 12/2/2011 12:54 PM (#591298 - in reply to #591207)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley
Roverdose - 12/2/2011 6:26 AM

Access_denied - 10/2/2011 6:38 PM
But at 3.5krpm and 15psi both engines will be the same or the small turbo will be better due to spooling faster


how can you say the smaller one would be better but think the larger one cant be?

munday is on about the efficiency of the engine, if you stick a 1" exhaust on it it wont be very good, go with a 3" and it will be more efficient. same principal with turbo's. if the larger turbine can flow the same pressure at the same revs, the engine will be more efficient so make more power.

where did you get the pistons daz?

Drew


got the pistons from qed matched to the rods
dazbooker
Posted 12/2/2011 12:56 PM (#591299 - in reply to #591296)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley
Turley_vvc - 12/2/2011 8:51 PM

Daz juat been looking at your engine,what engine paint did you use to get that finished as i want that finish on mine?


cant remember really it does say in the journal somewhere
elise
Posted 12/2/2011 2:20 PM (#591319 - in reply to #590549)
Subject: RE: turbo k series
Member

Posts: 57
2525
dazbooker - 9/2/2011 12:52 PM

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


The problem is not impact you will be fine on that , but piston too close is more prone to det however i expect a good mapper will map around it
I have less than 40 thou between the head / piston as i am chasing squish ( better burn less det ? )even thou there is not a lot to be had on a k head i have high c/r low boost and dont expect any problems
dazbooker
Posted 13/2/2011 3:21 PM (#591516 - in reply to #474141)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley		heres a few pics of what ive done today

before i started lifting the engine out and then the bay empty

i managed to get the engine mounting fitted to the bnew engine and the aternater bracket fitted

ive also retaped the wiring loom aswell and sorted a few dodgy wires i noticed



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Attachments 005.jpg (91KB - 75 downloads)
jon8oy
Posted 13/2/2011 3:46 PM (#591521 - in reply to #474141)
Subject: RE: turbo k series


now on 2 wheels

Posts: 7576
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Location: back in longbridge b31		looks awsome mate can i ask why no cambelt covers?
dazbooker
Posted 13/2/2011 3:52 PM (#591527 - in reply to #591521)
Subject: RE: turbo k series
Expert

Posts: 1265
10001001002525
Location: barnsley
jon8oy - 13/2/2011 11:46 PM

looks awsome mate can i ask why no cambelt covers?


like it without mate
jon8oy
Posted 13/2/2011 3:57 PM (#591528 - in reply to #591527)
Subject: RE: turbo k series


now on 2 wheels

Posts: 7576
50002000500252525
Location: back in longbridge b31
dazbooker - 13/2/2011 8:52 PM

jon8oy - 13/2/2011 11:46 PM

looks awsome mate can i ask why no cambelt covers?


like it without mate
i think they look great without id be woried about the stones or have i missed somat and youve got a gaurd?
goldievvc
Posted 13/2/2011 3:58 PM (#591529 - in reply to #591527)
Subject: RE: turbo k series
Scooby Slayer

Posts: 2229
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Location: falkirk, scotland
dazbooker - 13/2/2011 11:52 PM

jon8oy - 13/2/2011 11:46 PM

looks awsome mate can i ask why no cambelt covers?


like it without mate


i used to be the same until i watched a stone get lodged into a race cars cambelt and throw £12000 of engine down the pan!!

you`d be finished by now if you didn`t stop to take pics every 5 minutes
dazbooker
Posted 14/2/2011 1:09 PM (#591710 - in reply to #591528)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley
jon8oy - 13/2/2011 11:57 PM

dazbooker - 13/2/2011 8:52 PM

jon8oy - 13/2/2011 11:46 PM

looks awsome mate can i ask why no cambelt covers?


like it without mate
i think they look great without id be woried about the stones or have i missed somat and youve got a gaurd?


got an under wing shield mate that i made especially for the reason of keeping anything out of the way of the cam belt
dazbooker
Posted 14/2/2011 1:51 PM (#591724 - in reply to #474141)
Subject: RE: turbo k series
Expert

Posts: 1265
10001001002525
Location: barnsley		ok got the oil cooler take off plate painted up and fitted

also got the retaped wiring loom fitted and also fitted the lower alternater bracket



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Attachments 004.jpg (94KB - 77 downloads)
DAVESEI
Posted 14/2/2011 2:12 PM (#591729 - in reply to #474141)
Subject: RE: turbo k series
previously known as....Dazgta

Posts: 2019
2000
Location: birmingham		looks quality mate ....this really gets me motivated to do more to my tourer
dazbooker
Posted 17/2/2011 12:48 PM (#592290 - in reply to #474141)
Subject: RE: turbo k series
Expert

Posts: 1265
10001001002525
Location: barnsley		heres some pics of the mgfmounting i converted to fit the metro

Edited by dazbooker 17/2/2011 12:49 PM




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James160vvc
Posted 17/2/2011 4:58 PM (#592330 - in reply to #591729)
Subject: RE: turbo k series


Flying a Spitfire

Posts: 5097
5000252525
Location: birmingham
DAVESEI - 14/2/2011 8:12 PM

looks quality mate ....this really gets me motivated to do more to my tourer


yeah other than clean it lol
DAVESEI
Posted 18/2/2011 1:38 AM (#592350 - in reply to #592330)
Subject: RE: turbo k series
previously known as....Dazgta

Posts: 2019
2000
Location: birmingham
James160vvc - 17/2/2011 4:58 PM

DAVESEI - 14/2/2011 8:12 PM

looks quality mate ....this really gets me motivated to do more to my tourer


yeah other than clean it lol


Lol I do loves cleaning mi kars
DAVESEI
Posted 18/2/2011 1:38 AM (#592351 - in reply to #592330)
Subject: RE: turbo k series
previously known as....Dazgta

Posts: 2019
2000
Location: birmingham
James160vvc - 17/2/2011 4:58 PM

DAVESEI - 14/2/2011 8:12 PM

looks quality mate ....this really gets me motivated to do more to my tourer


yeah other than clean it lol


Lol I do loves cleaning mi kars
carl747
Posted 18/2/2011 5:50 AM (#592402 - in reply to #474141)
Subject: RE: turbo k series


Regular

Posts: 234
10010025
Location: Leicester		Daz could you PM the link for the polybushes engine mounts cheers mate

and looking good can't wait to finish my enigne now nd i've only just started lol

andyvvcmetro
Posted 18/2/2011 10:19 AM (#592427 - in reply to #474141)
Subject: RE: turbo k series
Veteran

Posts: 309
100100100
Location: dumfries		i noticed in the photo of the engine mount that you have a white bush in it? What is it made of and where did you get it?
dazbooker
Posted 18/2/2011 10:48 AM (#592439 - in reply to #592427)
Subject: RE: turbo k series
Expert

Posts: 1265
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Location: barnsley
andyvvcmetro - 18/2/2011 6:19 PM

i noticed in the photo of the engine mount that you have a white bush in it? What is it made of and where did you get it?


the bush is nylon and i had it specially made as i couldnt get any poly ones to fit
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