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View Full Version : My Ihi Turbo Is Dead !! Help With New Turbo Please


barnsley
21-07-2007, 13:55
hi i have a leon with jabba ihi fitted the turbo when last night no boost and loads of oil smoke out of the exhaust :cry::cry:

do i just fit a new ihi vf34 or do fit some scat rods and go BIGGER with the turbo

THANKS ALL

Craig!
21-07-2007, 14:30
Bigger... my engine and turbo's fooked and it looks like im going bigger or back to standard and sell on.

ryan_s3
21-07-2007, 15:37
I'd go with a 18g,depends whether jabba can/will map it for you.Other option is owens ihi/gt30 hybrid.Is it under warranty?do you have standard internal?what boost were you running?

lofer
21-07-2007, 15:42
I'd ring jabba first thing Monday! I've always found them extremely helpful

barnsley
21-07-2007, 15:55
I'd go with a 18g,depends whether jabba can/will map it for you.Other option is owens ihi/gt30 hybrid.Is it under warranty?do you have standard internal?what boost were you running?

whats an 18g im a bit thick phoned jabba no warranty not sure if im taking it back there im on std internals 1.3 bar boost small port auq engine

ryan_s3
21-07-2007, 16:02
I wouldn't have thought it should have failed running 1.3 bar.Mine did 10k at 1.6bar no problem. a 18g is a mhi td05h 18g they come in all sorts of forms but i'd try and go for one with a 8cm exhaust housing and larger td06 compressor cover if it will fit.
MRC would be my first choice.

barnsley
21-07-2007, 16:11
will that bolt stright on or req some mods ie exhaust manifold down pipe whos MRC

ryan_s3
21-07-2007, 16:23
Will bolt straight on,just make sure of clearance with the bigger compressor housing.
MRC are a company, www.mrctuning.com

ibizacupra
21-07-2007, 16:45
you 100% sure that combo "will bolt straight on" Ryan?

you seen it actually done?
8cm housing? TD06 wheel?????

what compressor housing..
its mighty tight down there.

Another IHI bites the dust.
why no warranty? how longs it been fitted then? (by them?)

http://badger-5.com/bin/new-mani/new-turbo-mani-1.jpg
or
http://badger-5.com/bin/new-mani/badger5-ceram-mani-4.jpg

not a chance of these comp housings fitting Jabbasport manifold.

barnsley
21-07-2007, 16:51
was fitted by jabba 2000 mile ago befor i got the car was told warranty is with the person that payed the bill

ryan_s3
21-07-2007, 16:57
You can get a small td06 compressor housing,the 8cm is the exhaust housing and it will bolt up directly to the standard manifold,the only issue is that it might just foul as we have seen with dan-ish proper td06.Personally i think the vf34 is a small turbo capable of 340bhp maximum.A proper 18g will do 380bhp no problem.

ryan_s3
21-07-2007, 16:58
was fitted by jabba 2000 mile ago befor i got the car was told warranty is with the person that payed the bill

sounds like a get-out clause!

barnsley
21-07-2007, 17:00
sounds like a get-out clause!


does to me too not happy at all [:@]

CupraUK
21-07-2007, 17:19
http://badger-5.com/bin/new-mani/new-turbo-mani-1.jpg
I love that pic... such a beautiful thing

ibizacupra
21-07-2007, 17:43
You can get a small td06 compressor housing,the 8cm is the exhaust housing and it will bolt up directly to the standard manifold,the only issue is that it might just foul as we have seen with dan-ish proper td06.Personally i think the vf34 is a small turbo capable of 340bhp maximum.A proper 18g will do 380bhp no problem.

oddly enough i do know what an 8cm housing is... I do have one after all. lol
pointless however and ill sized on a small comp wheel... but what do I know eh?
:p

VF34 have been fine except for when customers get over zealous with their ambitions on what it will make... much to do with people on forums and the power claims... but not so many speak up when its all gone pete tong... How weird is that tho eh? :rolleyes:
Many VF34's have expired is the reality.

How has wilko's 18G got on... not ever seen any figures off it.. or Caneys? whats he running these days?

Owens would be my choice for hybrid if someone asked me today for a 400bhp level unit on cast manifold like JS.

barnsley
21-07-2007, 17:48
bill is that the ihi/gt30 hybrid on owens will i have to mod much what would you do . not sure what to do thinking about buying a kit from jbs but not sure which one as im small port

Craig!
21-07-2007, 17:52
Mine might have expired after 2000 miles too but this looks like a valve will have caused the damage (if there is damage yet to check). I however was running 1.5 bar but it was no where near as hard mapping as the likes of Jools (custardcupra) as his with the P20 still spooled well mine always felt laggy.

As soon as I've stripped mine down there will be a 'looks whats failed' thread to warn people, and I really wished I'd seen Bill's thread regarding fitting a £375.00 set of one piece valves before going IHI. When I spoke to Jabba regarding internals I was told not to worry or waste my money, and there would be no problems on the standard valves... oops.

If my VF34 P20 is dead I'll be looking into the likes of the above mentioned, but untill I actually know whats wrong I can't comment too much. Need to find out what is wrong before throwing away £££.

I'm undecided on mapping, if Mike will map another turbo fair play, if not I'll need to find somewhere willing to do it.

ibizacupra
21-07-2007, 17:56
owens have a few versions of that turbo in various trims etc. given a call and discuss.
hotside and DP should be ok, but not sure about oil/water lines to it.. Dan can comment as he's fitted one.
you do have to trim a piece of the head casting to allow it to sit righ on the manifold.
EGTs are critical on these for reliable operation, so whoever tunes it afterwards should bare this in mind.
The leon combe saloon i race against runs the owens turbo, previously PE1820 like mine, and has made 440bhp on owens rollers. it has had wastegate actuator seizure like my FPs have had, but thats its positioning in 1.8t engine bay (transverse) and its "cooking" temps.
The 18G's mentioned are worth considering, but you should work up a package with whoever you wish to tune the car with and consider some tweeks during fitting will inevitably be req'd..... as opposed "it just bolts on"
Mark Harrison @ Owens is who I have spoken with (race against) - top bloke with some very good advise.

barnsley
21-07-2007, 18:02
thanks bill
do you have a web address or phone number

ibizacupra
21-07-2007, 18:07
Mine might have expired after 2000 miles too but this looks like a valve will have caused the damage (if there is damage yet to check). I however was running 1.5 bar but it was no where near as hard mapping as the likes of Jools (custardcupra) as his with the P20 still spooled well mine always felt laggy.

As soon as I've stripped mine down there will be a 'looks whats failed' thread to warn people, and I really wished I'd seen Bill's thread regarding fitting a £375.00 set of one piece valves before going IHI. When I spoke to Jabba regarding internals I was told not to worry or waste my money, and there would be no problems on the standard valves... oops.

If my VF34 P20 is dead I'll be looking into the likes of the above mentioned, but untill I actually know whats wrong I can't comment too much. Need to find out what is wrong before throwing away £££.

I'm undecided on mapping, if Mike will map another turbo fair play, if not I'll need to find somewhere willing to do it.

you might wanna check with jools/custard on how theirs are currently running

If JS have advised not to bother with valves, thats surprising to me, as we both know what happens on more than a few tuned 1.8t's. Thats why uprated valves got brought into the equation at all, BECAUSE of KNOWN FAILURES. I started the change to uprated valves supplying them initially. Its an investment at the end of the day vs risk if you dont. (much like rods... do i dont i type question)

Fueling and top end egt's is where some of the "tuners" vary their opinions on how to map cars. I know CC mapping is less than ideal on my own for absolute power on afr's compared to mikes mapping, but egt's are lower from the extra fuel dumping. The thing is, unless you have gauging to see whats going on, you will be oblivious until things go wrong mechanically in a big way.
Ignorence is'nt neccessarily bliss. Thats a big reason I fitted zeitronix way back when... as I had had enough of not knowing whats going on, in real world/track use, and repeated heat related failures. (never bearings tho)

:)

ibizacupra
21-07-2007, 18:10
thanks bill
do you have a web address or phone number


http://www.owendevelopments.co.uk/uploaded/Owens-Subaru-1.jpg

Mail: Owen Developments (UK) Limited
28 Kingston Business Park
Kingston Bagpuize
Oxford
OX13 5AS
United Kingdom

For a detailed map of where to find us click here


Phone: (+44) 01865 821062
Fax: (+44) 01865 821076
Email: Technical Support
support@owendevelopments.co.uk

Sales
sales@owendevelopments.co.uk

Service
service@owendevelopments.co.uk


Mark Harrison is the guy I know.

ryan_s3
21-07-2007, 18:21
When i said it will bolt up i mean it will fit the jabba manifold and i did point out that there would be some fitment issues due to the larger compressor housing.I have no idea what wilko or caney run these days.
Seems as though my own big 16g with 10.5cm hotside would not be too your liking then?



oddly enough i do know what an 8cm housing is... I do have one after all. lol
pointless however and ill sized on a small comp wheel... but what do I know eh?
:p

barnsley
21-07-2007, 18:25
http://www.owendevelopments.co.uk/products/product-detail.asp?prodId=612

is it this one

ibizacupra
21-07-2007, 18:27
10.5cm hotside??? wtf...
your kidding right? thru a JS mani which is less than 52mm outlet port size...

Your talking EVO tho now yes?

ibizacupra
21-07-2007, 18:28
http://www.owendevelopments.co.uk/products/product-detail.asp?prodId=612

is it this one

I've posted the picture up yes..
several "flavours" of them

ryan_s3
21-07-2007, 18:42
i guess i can't compare evo stuff to vag stuff ,but i'm sure the jbs twin scroll stuff are just evo turbos as the manifold seems to reflect that. The e9 turbo runs a big 16g comp wheel,10.5cm hotside and large td06 compressor housing 420bhp potential on the stock e9. The 18g runs the same size comp ex and slightly bigger in the same hot side turbine in/ex but smaller 8cm housing.

my opinions of the owens ihi/gt30 is that it's a total mismatch and i can only think of one word lag. It will be very similar to a pe1820f but worse,tiny hotside and massive compressor wheel.

Wilko
21-07-2007, 19:53
The 18G on mine fits fine on the jabba manifold. Some minor grinding of the head casting and block casting was necessary to fit. It hold 1/2 bar more boost at the limiter than the vf34p20 did. Shifts nearer 300g/s of air verses <250g/s on a vf34. Spools quicker than my 34 ever did.

Caneys on td0520g, and tells me when it's running well is like his vf34 on nos. Still has some teething troubles though.

These turbos are much easier to fit if you make a 5mm stainless spacer to go between the manifold and turbo. No clearance issues then.
Oil feed line needs changing, and you may as well change the horrible water feed arrangement jabba supply.

I don't think any of the big turbo suppliers will give you a cast iron warranty, as there's always a number of excuses they can use, and at the end of the day you're taking the piss with these boost pressures >1.5 bar on normal fuel.

IHI's are fragile little turbos. I've killed 4, R1gti has killed 3, dan killed more.

WeeJase
21-07-2007, 20:08
was fitted by jabba 2000 mile ago befor i got the car was told warranty is with the person that payed the bill

get him to take the car back then.is the v5 in your name yet ?

UncleFester
21-07-2007, 20:41
Just transfer it back to his name for the work and then transfer it back after - that's if it's not in your name yet.

barnsley
21-07-2007, 21:01
get him to take the car back then.is the v5 in your name yet ?

car was up for sale at jabba they know last owner well

Wilko do you know the best place to get an 18g and fittings also who did you mapping

ryan_s3
21-07-2007, 21:06
I figured a decent 18g would produce 40-50bhp more than a vf34 nice to hear that it does wilko.
20g possibly too big a compressor wheel for the small exhaust turbine/housing but alot better than a vf34 hotside and a gt30 compressor.

dan-ish
21-07-2007, 22:05
I wouldn't bother going for a bigger turbo unless you can get it mapped.

The owens turbo spools well on the 2l...
BUT MY AUDI IS STILL NOT MAPPED.(I may be braking it soon as the tax will be up again so if anyone fances a 2l 20v let me know)

Wilko
21-07-2007, 22:31
car was up for sale at jabba they know last owner well

Wilko do you know the best place to get an 18g and fittings also who did you mapping

I got mine from blouch turbo in the states. Stealth racing sourcd the fittings.
Mapped by someone who works for a tuning company that doesn't offer custom mapping.:whistle:

Mrc seem to have been able to map Caneys at 2 bar using an rs4 maf. Boost has to come in slowly, as as ryan says big compresser on small turbine, the 20G is prone to surge.

Dan. You could try MRC, or go stand alone and take the bulbs out of the lights on your dash.

ibizacupra
21-07-2007, 22:59
i guess i can't compare evo stuff to vag stuff ,but i'm sure the jbs twin scroll stuff are just evo turbos as the manifold seems to reflect that. The e9 turbo runs a big 16g comp wheel,10.5cm hotside and large td06 compressor housing 420bhp potential on the stock e9. The 18g runs the same size comp ex and slightly bigger in the same hot side turbine in/ex but smaller 8cm housing.

my opinions of the owens ihi/gt30 is that it's a total mismatch and i can only think of one word lag. It will be very similar to a pe1820f but worse,tiny hotside and massive compressor wheel.

You exactly right your not comparing like for like remotely ryan.. :rolleyes:
EVO aint Scooby fitment turbo's (thread being IHI, Jabba VF34 died remember)

This guys running JS mani, VF34 setup, so what the point in talking EVo setups and twin scrolls?? :confused:

Have you driven a PE? laggy? not...
GT30R on 0.63 housing is as quick spooling as the PE1820 was, but had much stronger sustained top end.. Tims ibiza would drive by mine on a lot lower boost and neat idential spool on track.

Kevins Leon racecar runs the owen Gt30/ihi hybrid, running a reported 440bhp on owens rollers. He's not running big boost so far as I know either. (~1.5bar)

If you think a PE1820 has a massive compressor??? LOL It aint.
Its still small, as is its tiny turbine and housing.

if you look at a 62lb and 65lb comp wheel, you will soon realise what small is and what medium size looks like... :)

ibizacupra
21-07-2007, 23:01
.... vf34 hotside and a gt30 compressor.

What on earth runs this setup?

barnsley
21-07-2007, 23:11
so if i went for an 18g would it just be oil feed and coolant piping and mapping i need to sort i can use my exhaust and will my 440 injectors be ok for fueling will my inlet piping need to be bigger

ibizacupra
21-07-2007, 23:38
clocking it? (rotating)
remounting actuator brkt?

fueling should be ok, maybe consider 4bar fpr if not already on one, and also fuel pump, again if not already running a higher output one

18g does'nt sound like a huge leap.
only know of wilko running one for a few months now.

or another one>> http://cgi.ebay.co.uk/IHI-VF34-Ball-Bearing-Turbo-Turbocharger-SUABRU-Impreza_W0QQitemZ320138241804QQihZ011QQcategoryZ43120QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

for £435+carriage (£25) and start again as is.

JAY DE
22-07-2007, 01:16
or

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=320131811804&ssPageName=MERC_VI_RSCC_Pr4_PcY_BIN_Stores_IT&refitem=320138241804&itemcount=4&refwidgetloc=active_view_item&usedrule1=StoreCatToStoreCat&refwidgettype=cross_promot_widget

my 2 pence..

how much does it cost to get it clocked and the actuator, relocated... and who can go it..?

ryan_s3
22-07-2007, 08:13
hey bill lets not fall out over this mate,i did hours of research on a upgraded turbo when i had my vf34/1.8t. Everything pointed to a 18g being alot better option than the vf34,it's rebuilable/upgradable for a start and in my opinion alot stronger turbo.There's guys running a real 380bhp on scoobies at 1.4bar on the spec 18g i quoted.Lets face it 340bhp is a absolute top figure for a vf34 running lots of boost,as a alternative a 18g will do 40-50bhp more thats why i recommend it .

Could you explain why i can't compare evo 2.0 vs 1.8t? other than the twin scroll which helps spool but would not affect peak power? I would have thought a scooby engine is more unlike a straight 4 evo/1.8t engine.
Your telling me that the jbs kit is not a evo 9 turbo/evo fp green?

i know the compressor wheel on a pe1820 is 70mm which is not alot bigger than a big 16g/18g 68mm but the the pe has the tiny hotside of a vf34 i would say your car was running a real 360/370bhp when you had it on.

Tim was running a decent manifold, ie not jabba. A evo will spool a gt3076r (gt30r) alot quicker than a 1.8t and i've been in a 520bhp one with a proper set-up and i wouldn't describe the spool as anywhere near vf34/pe1820f but then again i wouldn't descibe the performance as near a vf34.

Interested to know more about this owens gt/ihi hybrid ,owens themselves quote 405bhp/355lb/t at 1.7 bar and full boost around 3500rpm for the smaller turbo but i doubt this would be suitable for standard piston/rodded 1.8t's lets face it we have been going round thinking we have 350-380bhp when we have 320-340bhp and it's a big jump to 400+









You exactly right your not comparing like for like remotely ryan.. :rolleyes:
EVO aint Scooby fitment turbo's (thread being IHI, Jabba VF34 died remember)

This guys running JS mani, VF34 setup, so what the point in talking EVo setups and twin scrolls?? :confused:

Have you driven a PE? laggy? not...
GT30R on 0.63 housing is as quick spooling as the PE1820 was, but had much stronger sustained top end.. Tims ibiza would drive by mine on a lot lower boost and neat idential spool on track.

Kevins Leon racecar runs the owen Gt30/ihi hybrid, running a reported 440bhp on owens rollers. He's not running big boost so far as I know either. (~1.5bar)

If you think a PE1820 has a massive compressor??? LOL It aint.
Its still small, as is its tiny turbine and housing.

if you look at a 62lb and 65lb comp wheel, you will soon realise what small is and what medium size looks like... :)

ryan_s3
22-07-2007, 08:17
You would have to convert back to cable driven throttle cable to run most stand alones other than the motecs and there £££'s. Standard ecu seems to do the trick on bills but whether jbs would touch it is another matter.Try MRC mate have heard nothing but good things.

Wilko
22-07-2007, 08:33
With an 18g my 550's are maxed out at 3bar fuel pressure, so 440's at 4 bar will be beyond their limits. I'm going 4 bar when I can get hold of my mapper.

Clocking the turbo is easy, but get whoever fits it to do it, and then the bosses for the actuator need cutting off, and rewelding.

ryan_s3
22-07-2007, 08:43
this seems to make sense,i could never understand how 440's could supply 380bhp worth of fuel,easy answer they don't,i remember 430's on mr2 turbo running out of puff at 320bhp and 540's being good for 370bhp. The evo comes with 560's though.

barnsley
22-07-2007, 09:21
With an 18g my 550's are maxed out at 3bar fuel pressure, so 440's at 4 bar will be beyond their limits. I'm going 4 bar when I can get hold of my mapper.

Clocking the turbo is easy, but get whoever fits it to do it, and then the bosses for the actuator need cutting off, and rewelding.


i will be fitting it my self so how would i clock it

h17och
22-07-2007, 09:53
mrc....i can say bad about them mate! done a terrible job of mapping my k04 ibiza

ryan_s3
22-07-2007, 11:05
lets hear some details then. I've never used them but i've heard good things

dan-ish
22-07-2007, 11:34
this seems to make sense,i could never understand how 440's could supply 380bhp worth of fuel,easy answer they don't,i remember 430's on mr2 turbo running out of puff at 320bhp and 540's being good for 370bhp. The evo comes with 560's though.

They can it has been done,it's not ideal to run injectors at high pressure and duty cycle mind.

ibizacupra
22-07-2007, 11:45
hey bill lets not fall out over this mate,i did hours of research on a upgraded turbo when i had my vf34/1.8t. Everything pointed to a 18g being alot better option than the vf34,it's rebuilable/upgradable for a start and in my opinion alot stronger turbo.There's guys running a real 380bhp on scoobies at 1.4bar on the spec 18g i quoted.Lets face it 340bhp is a absolute top figure for a vf34 running lots of boost,as a alternative a 18g will do 40-50bhp more thats why i recommend it .

Could you explain why i can't compare evo 2.0 vs 1.8t? other than the twin scroll which helps spool but would not affect peak power? I would have thought a scooby engine is more unlike a straight 4 evo/1.8t engine.
Your telling me that the jbs kit is not a evo 9 turbo/evo fp green?

i know the compressor wheel on a pe1820 is 70mm which is not alot bigger than a big 16g/18g 68mm but the the pe has the tiny hotside of a vf34 i would say your car was running a real 360/370bhp when you had it on.

Tim was running a decent manifold, ie not jabba. A evo will spool a gt3076r (gt30r) alot quicker than a 1.8t and i've been in a 520bhp one with a proper set-up and i wouldn't describe the spool as anywhere near vf34/pe1820f but then again i wouldn't descibe the performance as near a vf34.

Interested to know more about this owens gt/ihi hybrid ,owens themselves quote 405bhp/355lb/t at 1.7 bar and full boost around 3500rpm for the smaller turbo but i doubt this would be suitable for standard piston/rodded 1.8t's lets face it we have been going round thinking we have 350-380bhp when we have 320-340bhp and it's a big jump to 400+


You did research and I did actual fitment... and run a different setup.
In the context OF THIS THREAD, the guys got a JS mani, and an expired VF34.
Comparing hotsides from EVO's on twin scroll is completely irrelevant.. might as well talk external gated whilst your at it.. its that different.
Owens offer more than the 2 versions on their website I believe of their particular hybrid.
If this guys looking for something else, and still has stock internals, then he will be in the danger zone from anything bigger. 18g might well suit his wants, but I would'nt fit one on stock internals personally. foolhardy

Its a reasonable step change to push past 400bhp yes, and an even bigger one when your closer to 600bhp believe me ;)

ryan_s3
22-07-2007, 12:11
I thought your swapped the pe1820f for a td06 20g/fp green ?
Anyway in context of this thread,the guys not getting a vf34 off jabba so he needs a replacement.I guess the cheapest option is too buy another for £700 and chuck it on and it will need clocking. Personally if i was to do it again i wouldn't use a vf34 i would use a 18g,you could run it at lower boost until funds were available for rods/valves because as we should all know you always want more!It's also rebuilable with a 20g wheel etc.If your happy with what you have then stick with the vf34.

ryan_s3
22-07-2007, 13:02
What on earth runs this setup?

jbs blurb;

The JBS IHI Stage 2 turbo conversion uses a custom developed JBS hybrid IHI hot-side combined with the cold-side of a GT30, offering the Garrett turbo power yet with the good old IHI turbo spool!

ibizacupra
22-07-2007, 13:15
thats a good option for him, just needs to be able to get the 18g modded to fit etc, and mapping checked and tweeked as req'd

ibizacupra
22-07-2007, 13:17
jbs blurb;

The JBS IHI Stage 2 turbo conversion uses a custom developed JBS hybrid IHI hot-side combined with the cold-side of a GT30, offering the Garrett turbo power yet with the good old IHI turbo spool!

lmao.... aka FP Green Spec, superzilla, which is nothing to do with an IHI aside from sharing the flange style.

and how do I know? I supplied it. ;)

ryan_s3
22-07-2007, 14:32
lmao.... aka FP Green Spec, superzilla, which is nothing to do with an IHI aside from sharing the flange style.
and how do I know? I supplied it. ;)

i knew it wasn't a ihi exhaust housing just by looking at it,but i thought i'd see what you would say!

ibizacupra
22-07-2007, 14:45
i knew it wasn't a ihi exhaust housing just by looking at it,but i thought i'd see what you would say!

lol-yea right
:rolleyes:

ryan_s3
22-07-2007, 15:12
lol.just look at the picture http://i103.photobucket.com/albums/m136/JBS_Auto_Designs/DSCF0001Small.jpg

barnsley
22-07-2007, 15:41
does anyone know what the most power i can run on a small port head as im now thinking about doing the internals

ryan_s3
22-07-2007, 15:49
plenty but you will make more with a largeport.

barnsley
22-07-2007, 15:58
am i right in saying large port is vvt or can i just use my cam set up

ryan_s3
22-07-2007, 16:17
nope all largeport are non vvt,cams depend on what you bhp goal is.

barnsley
22-07-2007, 16:19
not sure on how much bhp im wanting need to see how much funds i can get and need to buy a cheap run about

JAY DE
22-07-2007, 17:14
So guys if he bought an 18g and run it at 340 bhp what kinda boost will it be running..? 1.0bar maybe :confused:

ibizacupra
22-07-2007, 19:26
lol.just look at the picture http://i103.photobucket.com/albums/m136/JBS_Auto_Designs/DSCF0001Small.jpg

Yawn,.,,,,


:rolleyes:

ryan_s3
22-07-2007, 19:32
So guys if he bought an 18g and run it at 340 bhp what kinda boost will it be running..? 1.0bar maybe :confused:

around 1.2bar?a guess though

ibizacupra
22-07-2007, 19:44
some light reading :

http://seatcupra.net/forums/archive/index.php?t-62555.html

ryan_s3
22-07-2007, 20:02
john banks,now with me on the dark side,420bhp in his standard internalled evo 9. good link though.

Wilko
22-07-2007, 21:03
around 1.2bar?a guess though

1.4-1.5 bar on a small port just like the ihi. 1.8 bar to max the compresser flow out.

ryan_s3
22-07-2007, 21:36
suprised that the 18g can't shift more air at 1.5bar than a vf34 but if wilko says it i guess it's true.

Wilko
22-07-2007, 21:46
suprised that the 18g can't shift more air at 1.5bar than a vf34 but if wilko says it i guess it's true.

The amount of air you can fit into the cylinders is dictated by the capacity and the pressure at the valves. The only advantage a bigger turbo will give you is a slightly cooler charge, so 1-2% more air at best. It's a common fallacy banded around by idiots.

The power gains are in less exhaust backpressure on the pistons on the exhaust stroke

Bigger turbos make more power as they can move more air. The pressure at the intake is a function of volumetric flow and cylinder capacity, assuming volumetric efficiency is constant.

ibizacupra
23-07-2007, 09:47
and a 65lb comp wheel running 2.5bar boost shifts a lot of air.
:D

barnsley
23-07-2007, 18:49
come on then people so what do i do fit the same one or go bigger

Craig!
23-07-2007, 19:23
That choice can only be made by you and your budget. Owen Developments turbo to suit the 20VT engine is £1575.00, you'll need to make a new TIP and possibly (although not 100% as the manifold they used was warped them skimmed flat) need to trim the head castings a little.

You'll also require 550cc or 750cc injectors and you'll need to find someone to map it, not to mention anything over 340bhp will need valves and rods.

It all depends on how far you want to go.