Decat on standard turbo

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Decat on standard turbo #472463 01/11/2007 23:46 01/11/2007 23:46
Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart Kelv27 OP Forum is my job
Kelv27 OP Forum is my job Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart	I know alot on here say that you should never decat on a standard turbo. How many here has done it without experiencing any smokyness? $\:D$

Re: Decat on standard turbo [Re: Kelv27] #472467 01/11/2007 23:49 01/11/2007 23:49
H h2ypr Unregistered
h2ypr Unregistered H	Moi. Didnt run for MEGA mile without it on stnd turbo. But no smoking. Ross

Re: Decat on standard turbo [Re: ] #472491 02/11/2007 00:06 02/11/2007 00:06
Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart Kelv27 OP Forum is my job
Kelv27 OP Forum is my job Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart	Did or didn't ross?

Re: Decat on standard turbo [Re: Kelv27] #472522 02/11/2007 00:52 02/11/2007 00:52
H h2ypr Unregistered
h2ypr Unregistered H	Didnt. Ross

Re: Decat on standard turbo [Re: ] #472534 02/11/2007 00:59 02/11/2007 00:59
Joined: Dec 2005 Posts: 10,728 N.E Scotland mattB Club member 6
mattB Club member 6 I AM a Coop Joined: Dec 2005 Posts: 10,728 N.E Scotland	Put it this way; It's a good excuse if you're after a new turbo. $;\)$ 'Oh dear, my turbo seems to have gone. I shall have to get a new one. I feel it would be rude not to upgrade it while i'm there.' Death-rattle-tastic

Re: Decat on standard turbo [Re: mattB] #472572 02/11/2007 01:41 02/11/2007 01:41
Joined: Nov 2006 Posts: 2,000 Costa Del Sawley Paul_V Competition Level
Paul_V Competition Level Joined: Nov 2006 Posts: 2,000 Costa Del Sawley	Exactly what i did $;\)$

Re: Decat on standard turbo [Re: Paul_V] #472876 02/11/2007 07:21 02/11/2007 07:21
Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart Kelv27 OP Forum is my job
Kelv27 OP Forum is my job Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart	yeah I wouldlove a new turbo..but its so darn costly!..not to metion the other stuff you have to get to 'support' the new uprated turbo like fmic..etc.

Re: Decat on standard turbo [Re: Kelv27] #472932 02/11/2007 14:46 02/11/2007 14:46
Y yellow20vtbmx Unregistered
yellow20vtbmx Unregistered Y	mines done and doesnt smoke,cars done 94k so im sure it'll be new turbo in the next 6months $;\)$ make so much difference to the car,i did all the other jobs ready for the turbo. fmic,boost gauge,gtec, just need the walbro,g-reddy and turbo next.

Re: Decat on standard turbo [Re: ] #472965 02/11/2007 15:28 02/11/2007 15:28
D DidCoop Unregistered
DidCoop Unregistered D	I'd love to decat mine but just don't have the money to upgrade the turbo just yet so I'm wondering if I can get a Sports CAT for it instead?

Re: Decat on standard turbo [Re: ] #472990 02/11/2007 15:52 02/11/2007 15:52
M MattW Unregistered
MattW Unregistered M	I thought 16vt didnt need the back pressure as much as the 20vt so you can decat it on the standard turbo? dont quote me on that though.

Re: Decat on standard turbo [Re: ] #473143 02/11/2007 19:08 02/11/2007 19:08
D DidCoop Unregistered
DidCoop Unregistered D	Im pretty sure that's not the case but correct me if I'm wrong folks

Re: Decat on standard turbo [Re: ] #474974 05/11/2007 04:18 05/11/2007 04:18
G GT_SEB0 Unregistered
GT_SEB0 Unregistered G	i had this dispute on the puntosportsforum many times. a turbo causes its own back preasure and the manifold helps too. the best way to explain a turbo is the old hoover way of teling it turn your hoover on it sucks freely now put a sock over it and the airflow is reduced less performance. which all means with a decat yourn turbo has more freedom to spool up quicker faster and now back preasure from the cat cause the turbo to slow. if you do search about turbos they are recomended to be used with a decat. a cat on a turbo is wrong and its only job is to reduce emissions thats all.

Re: Decat on standard turbo [Re: ] #474978 05/11/2007 04:22 05/11/2007 04:22
M Mike_bd Unregistered
Mike_bd Unregistered M	agree with GT... p.s u have a punto gt? my mate used to have one in broom yellow, put my hyundai coupe 2.0 se to shame $\:D$ until it started losing oil pressure and he sold it on

Re: Decat on standard turbo [Re: ] #474985 05/11/2007 04:26 05/11/2007 04:26
M MABR Unregistered
MABR Unregistered M	Unless I'm mistaken, CoupeDave has also been running a decat with the standard turbo for quite some time with no obvious problems and quite a few gains. $\:\)$

Re: Decat on standard turbo [Re: ] #475025 05/11/2007 05:12 05/11/2007 05:12
Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart Kelv27 OP Forum is my job
Kelv27 OP Forum is my job Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart	Which means all these reports on smokey turbos has nothing to do with the decat at all?..and the only reason is because their turbo seals are already knackered and therefore more noticeble without the cat?

Re: Decat on standard turbo [Re: Kelv27] #475189 05/11/2007 16:21 05/11/2007 16:21
Joined: Aug 2007 Posts: 8,057 Southsea G Gunzi Club member 189, Former Club President
Gunzi Club member 189, Former Club President Je suis un Coupé G Joined: Aug 2007 Posts: 8,057 Southsea	I know a few people running with decats who've had no problems with smokey turbos. I guess it's like anything, if your clutch was on it's way out then a decat may accelerate its death due to increase in power/torque $\:\)$

Re: Decat on standard turbo [Re: Gunzi] #475206 05/11/2007 16:34 05/11/2007 16:34
Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart Kelv27 OP Forum is my job
Kelv27 OP Forum is my job Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart	Yeah i guess that makes sense Gunzi..just like how some say you would need a new clutch with a gtech

Re: Decat on standard turbo [Re: Kelv27] #475229 05/11/2007 16:54 05/11/2007 16:54
H h2ypr Unregistered
h2ypr Unregistered H	Yeah its like any consumable part. More strain and stress is obviously gonna mean it needs replaced quicker.... just buy the GTiR kelv!! $\:D$ Ross

Re: Decat on standard turbo [Re: Kelv27] #475242 05/11/2007 17:02 05/11/2007 17:02
Joined: Feb 2006 Posts: 5,390 Essex Trappy Forum is my life
Trappy Forum is my life Joined: Feb 2006 Posts: 5,390 Essex	I think the whole issue with smokey T28s is the hybrid or reconditioned examples. They really don't last very long at all. Standard (original) turbos it seems are good for 70k+ miles with or without a de-cat. Hybrids are fooked after 10-20k with or without a de-cat. I wouldn't think many people would replace a faulty OE turbo with an new, original T28, most will get a GTiR/ superspool and then get then watch it fall apart after a few thousand miles. All GT series turbos are just as reliable as original T28s with or without a de-cat. I'd be interested in the highest mileages made on hybrid turbo, one with a de-cat and another without... and the same with OE T28s and some GTs. F**** b**** thing...

Re: Decat on standard turbo [Re: ] #475274 05/11/2007 17:32 05/11/2007 17:32
Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart Kelv27 OP Forum is my job
Kelv27 OP Forum is my job Joined: Jun 2007 Posts: 4,597 Malaysia..Glasgow at heart	Haha ross doing god's work again..slowly but surely ross...slowly but surely.. $\:\)$

Re: Decat on standard turbo [Re: Trappy] #475295 05/11/2007 17:50 05/11/2007 17:50
M MattW Unregistered
MattW Unregistered M	Originally Posted By: Trappy I think the whole issue with smokey T28s is the hybrid or reconditioned examples. They really don't last very long at all. Standard (original) turbos it seems are good for 70k+ miles with or without a de-cat. Hybrids are fooked after 10-20k with or without a de-cat. I wouldn't think many people would replace a faulty OE turbo with an new, original T28, most will get a GTiR/ superspool and then get then watch it fall apart after a few thousand miles. All GT series turbos are just as reliable as original T28s with or without a de-cat. I'd be interested in the highest mileages made on hybrid turbo, one with a de-cat and another without... and the same with OE T28s and some GTs. My hybrid lasted 2.5 years, I'll have a look back through the receipts later to see how much of that was decatted, and how many miles it covered. remind me if I forget.

Re: Decat on standard turbo [Re: ] #475428 05/11/2007 19:40 05/11/2007 19:40
D DidCoop Unregistered
DidCoop Unregistered D	Am I right in saying it's a Garret T3 unit on a 16vt and a T28 on a 20vt?

Re: Decat on standard turbo [Re: ] #475638 05/11/2007 23:24 05/11/2007 23:24
B Blueman Unregistered
Blueman Unregistered B	Yes

Re: Decat on standard turbo [Re: ] #475715 06/11/2007 00:46 06/11/2007 00:46
D DidCoop Unregistered
DidCoop Unregistered D	Ah cool so what's the chances of a decat damaging this or have we fully established a decat does not increase wear on the bearings?

Re: Decat on standard turbo [Re: ] #475752 06/11/2007 01:11 06/11/2007 01:11
G GT_SEB0 Unregistered
GT_SEB0 Unregistered G	yes i had a fiat coupe my mate bought it off me ad thats decated on a standard ihi vl7 turbo and runs better a turbo bearing housing is tested beyond the revs the car can produce it to do something daft like 100000 revs a car does about halfish maybe 1/3 of that. the way you have to look at it turbos have been around alot longer than cats $\:D$

Re: Decat on standard turbo [Re: ] #475760 06/11/2007 01:16 06/11/2007 01:16
Joined: May 2006 Posts: 1,855 Birmingham B benje My life on the forum
benje My life on the forum B Joined: May 2006 Posts: 1,855 Birmingham	I got 102000 miles out of my totally standard turbo. (I had the car when it was on 89000) I have receipts for most stuff and it certainly doesnt look like it was changed at any point. It was still all working when I took it off, albeit it left a James Bond esque smokescreen on the motorway in traffic. Ben

Re: Decat on standard turbo [Re: benje] #475765 06/11/2007 01:18 06/11/2007 01:18
G GT_SEB0 Unregistered
GT_SEB0 Unregistered G	chip it decat it have fun $\:D$ $\:D$ $\:D$ $\:D$ $\:D$ $\:D$ $\:D$ $\:D$ Last edited by GT_SEB0; 06/11/2007 01:19.

Re: Decat on standard turbo [Re: benje] #475767 06/11/2007 01:19 06/11/2007 01:19
K kyle Unregistered
kyle Unregistered K	my car has 112k standard turbo,and de-cat for a number of months and no smoke problems (YET)

Re: Decat on standard turbo [Re: ] #475772 06/11/2007 01:25 06/11/2007 01:25
Joined: May 2006 Posts: 1,855 Birmingham B benje My life on the forum
benje My life on the forum B Joined: May 2006 Posts: 1,855 Birmingham	Incidentally, surely decatting will only allow the turbine to spin up more easily/ faster perhaps? (I'd assume the ECU would reign in the extra boost if any) Looking at the Turbine/Compressor and shaft on my desk next to me, I really cant see how back pressure would cause it to smoke more? Looking at the oil seal I really cant work it out!

Re: Decat on standard turbo [Re: benje] #475799 06/11/2007 01:50 06/11/2007 01:50
D DidCoop Unregistered
DidCoop Unregistered D	I think it's time for a decat and if it starts smoking it's time for hybrid $\:\)$

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