Fiat Coupe Forum
- Founded by Kayjey & James Northam
- Funded by the Club for the benefit of all owners
Fiat Coupe Club UK
join the club
Fiat Coupe Forum
 
» Announced
    Posting images


» Related sites
    Main club site
    fiatcoupe.net


» External data
    owners listed
 
Who's Online Now
0 registered members (), 214 guests, and 3 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums69
Topics113,543
Posts1,340,423
Members1,785
Most Online731
Jan 14th, 2020
Top Posters(All Time)
barnacle 33,520
stan 32,122
Theresa 23,294
PeteP 21,480
bockers 21,070
JimO 17,917
Nigel 17,366
Edinburgh 16,660
RSS Feeds
Club Events
Club Information
Track Events
Rolling Road/RWYB
Social Events
Non-UK Events
Coupé Related Chat
Coupé Spotting
Coupé News/Press
Buying/Selling Advice
Insuring a Coupé
Basic FAQ's
How to Guides
Forum Issues
Technical Problems
General Maintenance
Styling
Tuning
Handling
ICE and Alarm
Coupés for Sale
Coupés Wanted
Parts for Sale
Parts Wanted
Group Buys
Business Forum
Other Vehicles for Sale/Wanted
Other Items for Sale/Wanted
Haggling/Offers
Ebay links
Other Cars
Other Websites
General Chat
Previous Thread
Next Thread
Print Thread
Anyone know why the Tb28 turbo is so restrictive? #1531208
24/03/2015 13:44
24/03/2015 13:44

F
fiatphil
Unregistered
fiatphil
Unregistered
F



Looking at it on paper it should produce good figures given that it has a 42.6/60.1 compressor wheel, decent turbine and compressor AR. The Mitsubishi Td04 15t only has a 42/56 comp wheel and the Hot side is only an AR .33 (or 5cm²). These TD04s see 270/280 bhp on 2.0 litre engines and can break 300 on a 2.3.

So how come we don't get these figures on the Coupes with what should be a better turbo?

Last edited by fiatphil; 24/03/2015 13:46.
Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531213
24/03/2015 14:21
24/03/2015 14:21
Joined: Dec 2005
Posts: 17,366
Staffordshire
Nigel Offline
Forum veteran
Nigel  Offline
Forum veteran

Joined: Dec 2005
Posts: 17,366
Staffordshire
there are lots of Coupes with TB28s running 250+ bhp, with quite a few at the 270-280 level

Just needs a remap and fuel pump wiring mod, plus maybe a panel air filter


[Linked Image]
Re: Anyone know why the Tb28 turbo is so restrictive? [Re: Nigel] #1531223
24/03/2015 15:14
24/03/2015 15:14

F
fiatphil
Unregistered
fiatphil
Unregistered
F



Originally Posted By: Nigel
there are lots of Coupes with TB28s running 250+ bhp, with quite a few at the 270-280 level

Just needs a remap and fuel pump wiring mod, plus maybe a panel air filter


Hoping to be a round that figure myself soon. Remap pencilled in for next month. K&N panel filter already in and FMIC going in next week. Will have to look into the wiring mod.

Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531236
24/03/2015 16:57
24/03/2015 16:57
Joined: Dec 2005
Posts: 17,366
Staffordshire
Nigel Offline
Forum veteran
Nigel  Offline
Forum veteran

Joined: Dec 2005
Posts: 17,366
Staffordshire
Originally Posted By: fiatphil
Will have to look into the wiring mod.


Its very important, as the voltage to the pump can drop at very high revs, which can make the engine run lean, with predictable results

You're welcome to come and see how I've done mine - easy, but fiddly


[Linked Image]
Re: Anyone know why the Tb28 turbo is so restrictive? [Re: Nigel] #1531237
24/03/2015 17:00
24/03/2015 17:00

F
fiatphil
Unregistered
fiatphil
Unregistered
F



Originally Posted By: Nigel
Originally Posted By: fiatphil
Will have to look into the wiring mod.


Its very important, as the voltage to the pump can drop at very high revs, which can make the engine run lean, with predictable results

You're welcome to come and see how I've done mine - easy, but fiddly
Originally Posted By: Nigel
Originally Posted By: fiatphil
Will have to look into the wiring mod.


Its very important, as the voltage to the pump can drop at very high revs, which can make the engine run lean, with predictable results

You're welcome to come and see how I've done mine - easy, but fiddly


Might take you up on that Pal thumb

Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531302
25/03/2015 10:22
25/03/2015 10:22

F
fiatphil
Unregistered
fiatphil
Unregistered
F



Might have to get it on the dyno to see what it makes after the map. Bought relay with socket and flying leads, 25A power cable and a 15A inline fuse for under a tenner delivered. I'll have no problem soldering the wires in etc but I'll have to research the best route from the battery to the pump/relay in the boot. Any help would be greatfully received.

Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531305
25/03/2015 10:41
25/03/2015 10:41

G
Gimmo
Unregistered
Gimmo
Unregistered
G



Open the bonnet, see near the bonnet hinge.
There is a hole!
Put the cable inside this hole

click to enlarge

Now, remove the side wings (3 bolts) and discover another hole, with a black plastic cover.
Make a hole in the plastic cover, and put the cable inside.

Push the cable and search it by inside the car, near the fuse box there is a hole in the carpet, put your finger inside and search for the cable!

If you find it, you can put the cable under the carpet, on the side of rear seats, and come to the luggage by the rear seatbelt passage.

If it is not so clear I can make some photos this afternoon, because I am doind the same wiring mod!

Last edited by Gimmo; 25/03/2015 10:41.
Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531314
25/03/2015 12:37
25/03/2015 12:37

F
fiatphil
Unregistered
fiatphil
Unregistered
F



Originally Posted By: Gimmo
Open the bonnet, see near the bonnet hinge.
There is a hole!
Put the cable inside this hole

click to enlarge

Now, remove the side wings (3 bolts) and discover another hole, with a black plastic cover.
Make a hole in the plastic cover, and put the cable inside.

Push the cable and search it by inside the car, near the fuse box there is a hole in the carpet, put your finger inside and search for the cable!

If you find it, you can put the cable under the carpet, on the side of rear seats, and come to the luggage by the rear seatbelt passage.

If it is not so clear I can make some photos this afternoon, because I am doind the same wiring mod!


Fantastic, that would be a great help.

Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531316
25/03/2015 12:43
25/03/2015 12:43

G
Gimmo
Unregistered
Gimmo
Unregistered
G



Some photos this evening!
Please be patiece laugh

Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531378
25/03/2015 18:58
25/03/2015 18:58

W
woodvurm
Unregistered
woodvurm
Unregistered
W



Can't wait to see the pics, looked many times for suitable route through for vacuum hose and permanent live for my EBC.

After just running both through the same route as pictured above to get behind the wing I had to just run them over the door seal as there were no routes into the shell other than a grommet hidden behind the arch liner right at the bottom in the sill for wax oiling crazy

Surprised I didn't get wet feet laugh

I've since just put in two 10mm grommets at about the same height as the ecu on the passenger side then gouped over with carbond as extra barrier.

Can take some pics tomorrow.

Last edited by woodvurm; 25/03/2015 19:52. Reason: offer of photos
Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531385
25/03/2015 19:57
25/03/2015 19:57

G
Gimmo
Unregistered
Gimmo
Unregistered
G



Sorry guys today was raining!
Tomorrow morning I Will take photos and male a guide for you.
Sorry For delay frown

Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531569
26/03/2015 18:07
26/03/2015 18:07

G
Gimmo
Unregistered
Gimmo
Unregistered
G



Hy guys, sorry buy fot the moment only photos with no guide.
Today was and incredible day.. TWO TYRES fault!
I made an incredible pit stop in 52 minutes to change all 4 tyre putting on the summer tyres... I am so sad and so tyred..

In this moment I am starting for a week end far away from my pc and my Coop, so for this moment I give you the photos.
Maybe next week I will make a guide, otherwise if some one wants to comment my photos, no problem!

Photos are here https://www.dropbox.com/sh/kw37vt6fva8jsdr/AAB6EaLmXMGhqm9y4KdLbDv6a?dl=0

And the guide with the explaination of the rele' is here http://goo.gl/IBirwr

Please note that because in my case the car gone fault (fuel pump off and tyres, in the same day!!!) I tried to make the relais command, but in my car no eletricity in the luggage, so take a guide for connect the relais, and use my photo to pass with the wire from the battery in the front to the luggage.

Note: you need 7 meters of wire of 35mm2 of section, I don't know UK conversion (2 AWG), you have to make it yourself. In the photos I forgive to take the fuse, but remember the fuse!!!
And use standard fuel wire to give the command to relais

I hope that them can help you!

Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531613
26/03/2015 20:29
26/03/2015 20:29

W
woodvurm
Unregistered
woodvurm
Unregistered
W



Ah I see, this is a drainage outlet for water on my car from the sunroof ? I think ? So left it alone, might be I drilled holes for no reason.

Sorry to hear the wiring mod is proving tricky frown

Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1531784
27/03/2015 19:03
27/03/2015 19:03

F
fiatphil
Unregistered
fiatphil
Unregistered
F



Originally Posted By: Gimmo
Open the bonnet, see near the bonnet hinge.
There is a hole!
Put the cable inside this hole

click to enlarge

Now, remove the side wings (3 bolts) and discover another hole, with a black plastic cover.
Make a hole in the plastic cover, and put the cable inside.

Push the cable and search it by inside the car, near the fuse box there is a hole in the carpet, put your finger inside and search for the cable!

If you find it, you can put the cable under the carpet, on the side of rear seats, and come to the luggage by the rear seatbelt passage.

If it is not so clear I can make some photos this afternoon, because I am doind the same wiring mod!


Ran power to the boot using this method. Very easy. Thanks.

Re: Anyone know why the Tb28 turbo is so restrictive? [Re: ] #1534693
20/04/2015 22:47
20/04/2015 22:47

F
fiatphil
Unregistered
fiatphil
Unregistered
F



Pehaps the standard turbo isn't so restrictive after all. Not sure why my Coupe hit such good numbers? Quality fuel, K&N panel filter and FMIC are my guess. There was plenty of fuelling left too.

click to enlarge

Last edited by fiatphil; 20/04/2015 22:49.

Powered by UBB.threads™ PHP Forum Software 7.7.1
(Release build 20190129)
PHP: 7.3.33 Page Time: 0.015s Queries: 14 (0.008s) Memory: 0.7938 MB (Peak: 0.9213 MB) Data Comp: Off Server Time: 2024-03-28 15:17:47 UTC