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
1 registered members (Edinburgh), 245 guests, and 2 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums69
Topics113,543
Posts1,340,417
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 16,659
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
20v turbo Tuning Advice please #1610264
22/10/2017 10:44
22/10/2017 10:44

I
IanLE
Unregistered
IanLE
Unregistered
I



Hi Folks, although I have had several Coupes over the years I am just starting to tune my current LE. The engine spec is forged pistons and rods with Garrett 3071 turbo, 3in down pipe and upgraded inter cooler and induction kit, ported inlet manifold with 395cc injectors. I would like your advice on who would be best to remap my car for very usable fast road use with about 330 bhp, am I being realistic? Your advice would be appreciated.

Re: 20v turbo Tuning Advice please [Re: ] #1610284
22/10/2017 15:14
22/10/2017 15:14
Joined: May 2014
Posts: 169
france
J
jarofjam Offline
Club member 1297
jarofjam  Offline
Club member 1297
On a journey
J

Joined: May 2014
Posts: 169
france
Hi,try FC PERFORMANCE in Castle Combe,he is used to Coupes and is a forum member.

Re: 20v turbo Tuning Advice please [Re: ] #1610302
22/10/2017 18:29
22/10/2017 18:29
Joined: Oct 2008
Posts: 6,783
In the coupe.
magooagain Offline
Club Member 259
magooagain  Offline
Club Member 259
Forum is my life

Joined: Oct 2008
Posts: 6,783
In the coupe.
As above try contacting Fc performance. The guy's name is Flea on here.

That's a big turbo for 330 hp.



Re: 20v turbo Tuning Advice please [Re: magooagain] #1610325
23/10/2017 06:04
23/10/2017 06:04
Joined: Feb 2006
Posts: 5,390
Essex
Trappy Offline
Forum is my life
Trappy  Offline
Forum is my life

Joined: Feb 2006
Posts: 5,390
Essex
Originally Posted By magooagain

That's a big turbo for 330 hp.


That's a big understatement! laugh

That turbo is good for well over 400bhp with the right supporting mods shocked


F****** b****** thing...
Re: 20v turbo Tuning Advice please [Re: ] #1610335
23/10/2017 08:55
23/10/2017 08:55

I
IanLE
Unregistered
IanLE
Unregistered
I



Hi Guys, thanks for the advice.
I am in Shropshire - is there anywhere in the midlands that anyone can recommend for the remap?
Thank you.

Re: 20v turbo Tuning Advice please [Re: ] #1610340
23/10/2017 10:24
23/10/2017 10:24
Joined: Feb 2008
Posts: 1,725
London
kj16v Offline
My life on the forum
kj16v  Offline
My life on the forum

Joined: Feb 2008
Posts: 1,725
London
Yeah, ME (Voodoo Tuning)! Since I never get a bloody mention on this forum! laugh
I've been tuning Coupe engines for years and have owned (and of course tuned) 20VT AND 16VT Coupes.

And in the spirit of fairness, there's also Johny Bravo Turbo (Midlands Car Servicing) on this forum. TBF, he's a lot closer to where you live, too.

Last edited by kj16v; 23/10/2017 10:25.
Re: 20v turbo Tuning Advice please [Re: ] #1610386
24/10/2017 04:17
24/10/2017 04:17
Joined: Dec 2005
Posts: 17,366
Staffordshire
Nigel Offline
Forum veteran
Nigel  Offline
Forum veteran

Joined: Dec 2005
Posts: 17,366
Staffordshire
Hi IanLE - Magooagain is right - that’s a monstrous turbo if you’re only aiming for 330bhp. Which turbine housing do you have - 0.64 or 0.86?

Trappy is also right - you’ll struggle to make less than 400bhp, although I suspect the injectors will be the limiting factor - are you also running the uprated 3.8 bar fuel pressure regulator? This will take your 395s to about 500cc

My own car was mapped by Leighton (Flea) and I’ve driven cars mapped by kj16v - both know what they are doing

Just one suggestion - if the true potential of the turbo is realised, you will need better suspension and brakes - 400+ bhp can get you into a lot of trouble very quickly


[Linked Image]
Re: 20v turbo Tuning Advice please [Re: ] #1610432
24/10/2017 18:19
24/10/2017 18:19

I
IanLE
Unregistered
IanLE
Unregistered
I



Great advice chaps - keep it coming!
I'll have a look at the turbine housing tomorrow and get back to you.
If I get a 3.8 regulator will I need another fuel pump? If so, which one?
Yes I've already done the brakes and suspension thanks.
In the ideal world I'm trying to create a very powerful flexible road car not a track car - something that's just as happy at low revs in traffic as it is on the open road.
Great advice so far.

Re: 20v turbo Tuning Advice please [Re: ] #1610456
25/10/2017 06:23
25/10/2017 06:23
Joined: Oct 2008
Posts: 6,783
In the coupe.
magooagain Offline
Club Member 259
magooagain  Offline
Club Member 259
Forum is my life

Joined: Oct 2008
Posts: 6,783
In the coupe.
Ian have a look at the top of this section,there Is a a 20 vt tuning advice list,it's old but some info is still relevant.

A coupe tuner/mapper is the best place to get it right.



Re: 20v turbo Tuning Advice please [Re: ] #1610472
25/10/2017 09:01
25/10/2017 09:01
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 IanLE
If I get a 3.8 regulator will I need another fuel pump? If so, which one?


At your target power, you will definitely need an upgraded fuel pump, as well as the direct feed modification (uses the original fuel pump power feed to activate a relay, which powers the fuel pump direct from the battery)

The fuel pump you need is the Walbro 255lph - there are three models, GSS340, GSS341 and GSS342 - you will need the GSS340

Be VERY careful of fakes - there are lots around - a fake will struggle to supply the fuel and could easily cause engine damage if it runs the engine lean at high boost - definitely buy from a reputable motorsport specialist


[Linked Image]
Re: 20v turbo Tuning Advice please [Re: ] #1610476
25/10/2017 09:14
25/10/2017 09:14
Joined: Feb 2006
Posts: 5,390
Essex
Trappy Offline
Forum is my life
Trappy  Offline
Forum is my life

Joined: Feb 2006
Posts: 5,390
Essex
A few thoughts...

Uprated clutch goes without saying really...

'Colder' spark plugs - NGK 7s or even 8s most likely.

Straight induction pipe (SIP)- worthwhile if you already have the FMIC.

You said 3" downpipe - you'll want 3" right through at that level.

Good quality dump valve - a few extra PSI over a standard one, even if it still works.

Track day type tyres - it's nice to use some of the power before 70mph!

Short-shift gear change - saves you the walk when changing gear laugh

I'd also recommend a cambelt guard from Flea. Peace of mind in case the belts go...


F****** b****** thing...
Re: 20v turbo Tuning Advice please [Re: ] #1610513
25/10/2017 18:27
25/10/2017 18:27

I
IanLE
Unregistered
IanLE
Unregistered
I



Great advice chaps - thank you.
The turbine housing is .86 by the way - what benefit is this?
With regards to the clutch I was thinking of a DriveTorque stage 2 as i think it may be better in traffic but still be able to handle the extra power when needed - what do you think?
I presume the upgraded fuel pump is a direct replacement of the original?
I'll order a let guard from Flea.

Re: 20v turbo Tuning Advice please [Re: ] #1610523
26/10/2017 05:38
26/10/2017 05:38

J
Julien
Unregistered
Julien
Unregistered
J



Originally Posted By IanLE
Great advice chaps - thank you.
The turbine housing is .86 by the way - what benefit is this?
With regards to the clutch I was thinking of a DriveTorque stage 2 as i think it may be better in traffic but still be able to handle the extra power when needed - what do you think?
I presume the upgraded fuel pump is a direct replacement of the original?
I'll order a let guard from Flea.


AR 0.86 on a GT3071 is big for your power goal, you won't have full boost before 4500rpm and then it will go a bit crazy -> you should go down to something around 0.64 which is already good for 500hp+

A gt3071 is not a "good streetable 330hp turbo", you should sell it and take a gt28rs or gtx2860r, those are good turbo for 350hp goals (at least)

Last edited by Julien; 26/10/2017 05:42.
Re: 20v turbo Tuning Advice please [Re: ] #1610547
26/10/2017 10:52
26/10/2017 10:52
Joined: Feb 2008
Posts: 1,725
London
kj16v Offline
My life on the forum
kj16v  Offline
My life on the forum

Joined: Feb 2008
Posts: 1,725
London
I wouldn't touch DriveTorque. DriveTorque is one of the many names for CG Motorsport. I used to use their clutches - until they started palming off poorly built products on me and I had to take them to court. CG Motorsport and their shonky clutches were the exact reason why I developed my own uprated clutches Coupes!

Re: 20v turbo Tuning Advice please [Re: ] #1610557
26/10/2017 13:51
26/10/2017 13:51
Joined: Dec 2005
Posts: 17,366
Staffordshire
Nigel Offline
Forum veteran
Nigel  Offline
Forum veteran

Joined: Dec 2005
Posts: 17,366
Staffordshire
A GT3071 0.86AR is good for over 500bhp with supporting mods

It will be far more laggy than you need - a turbo capable of delivering 350-ish bhp should be spooling before 3,000rpm - with the 0.86AR turbine housing, a GT3071 won't spool fully until over 4,000rpm, which will leave you a pretty narrow powerband.

I would echo Julien's thoughts above - sell the 3071 and get something with a significantly earlier spool (unless of course, you expect to carry on modding... wink )


[Linked Image]
Re: 20v turbo Tuning Advice please [Re: kj16v] #1610559
26/10/2017 14:58
26/10/2017 14:58

I
IanLE
Unregistered
IanLE
Unregistered
I



thanks for your advice - how much is one of your clutches? i'm trying to avoid a paddle clutch as i've heard they need a few revs to pull away and are difficult in traffic.

Re: 20v turbo Tuning Advice please [Re: ] #1610563
26/10/2017 16:42
26/10/2017 16:42
Joined: Jul 2012
Posts: 1,650
Dark side of the Moon
H_R Offline
My life on the forum
H_R  Offline
My life on the forum

Joined: Jul 2012
Posts: 1,650
Dark side of the Moon
Just for your Reference and comparison!

I have 358 bhp 311lbft torque
only major changes are
GT28RS turbo .64
H&S downpipe
Pro alloy FMIC Short route mod
Pro alloy SIP
Boost controller
Cone filter
Direct feed fuel pump wiring
Helix uprated clutch

Flea did the live mapping, the car is very nice off boost and is also very fast but very linear, there is no sudden kick, just very smooth and progressive power, the clutch was slipping when set up so settings were tame on the boost controller due to this (i think)
I have never adjusted the settings since, as this is a standard engine Non Forged
I know i could turn it up and bring the boost on stronger but its fine as it is (for me anyway) perhaps one day when i have more time laugh

Re: 20v turbo Tuning Advice please [Re: ] #1610641
27/10/2017 23:45
27/10/2017 23:45
Joined: Feb 2008
Posts: 1,725
London
kj16v Offline
My life on the forum
kj16v  Offline
My life on the forum

Joined: Feb 2008
Posts: 1,725
London
Originally Posted By IanLE
thanks for your advice - how much is one of your clutches? i'm trying to avoid a paddle clutch as i've heard they need a few revs to pull away and are difficult in traffic.


£550 + postage

Re: 20v turbo Tuning Advice please [Re: Nigel] #1610951
03/11/2017 15:48
03/11/2017 15:48

I
IanLE
Unregistered
IanLE
Unregistered
I



I have double checked my turbine manifold and the casting has 64 on it- am i looking in the correct place to establish if its a .64 or a .86 size? if not where do i look to find out? I've got the turbo off now.
if i have a .64 at what revs will it spool up?
thanks
Ian

Re: 20v turbo Tuning Advice please [Re: ] #1611026
04/11/2017 22:16
04/11/2017 22:16
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 other factors that could affect spool up, but a 3071 with a 0.64ar turbine housing would probably spool at about 3,500rpm. 0.86 about 500rpm later


[Linked Image]
Re: 20v turbo Tuning Advice please [Re: ] #1611079
06/11/2017 00:53
06/11/2017 00:53
Joined: Aug 2010
Posts: 102
Torquay
I
InfectusGuy Offline
On a journey
InfectusGuy  Offline
On a journey
I

Joined: Aug 2010
Posts: 102
Torquay
I can vouch for Voodoo/KJ's mapping and clutches which if feel is important drive no different to standard. smile


Powered by UBB.threads™ PHP Forum Software 7.7.1
(Release build 20190129)
PHP: 7.3.33 Page Time: 0.017s Queries: 14 (0.009s) Memory: 0.8331 MB (Peak: 0.9889 MB) Data Comp: Off Server Time: 2024-03-28 08:56:00 UTC