It was run in 3rd gear Ross, so you can take away 200-300rpm if using 4th gear, and then another 100-200rpm when on the road.

looking at the FC performance hall of fame...

it makes REALLY good reading!!

we now have 3 people in the 500bhp club and an impressive 13 people in the 400bhp club!!!!

this is such a fantastic achievement!! well done to all involved!!

So maybe 3300rpm-3500rpm?

For a monster thats pretty impressive! Thinking back to the good old days when a gt28rs coming in at 4000rpm with 400bhp was impressive, this just blows it out of the water!!

Ross

Nah, let's not go down that route. It'll be mental. Like... 560 or something.

Errr... oops.

Where do you get that from? HOF shows 3 in the 500+ range without Barbz or me

Correct, on the road whatever boost i dial in its full on by 3.5k in any gear, and she's rampaging .
I had a couple of 2 bar overboost mishaps whilst setting up the Apexi and O' My God! , that felt nuts !

Just look at the spec of the Z06 LS7 vs mine..

Z06 7.0L
503bhp
470trq
1.4 ton

Vs

TI 2.4L
460bhp
360trq (Heartbreaker figures)
1.3 ton

Great work, very impressing..

Hi Barbz, sounds really great.
Congratulation to your results (as always, if you are starting a new project :-) ).
I think that a big advantage is using the new GTX3076r, too.
We in Germany have direct comparison between the new GTX3076r and the older GT3040r with same exhaust housing 0,82AR in the same car, same spec (Delta Integrale).
Result: the new turbo spools a bit quicker at more top end power. Bespoke Delta Integrale makes easily >500HP!
We think that even >600HP should be absolutely no problem with this turbo.
To the downpipe – bigger is always better at turbo engines :-)
But a 3” exhaust should be enough for 800whp as well – only difference is, that you will lose some efficiency, because you will have to compensate the additional backpressure of the downpipe – means you will need more boost to get the same results as with your 3,5” pipe. Therefore I would prefer 3,5” as well :-)
Another big thing is your manifold – I love it. It looks good and has in my eyes best pipe size for good response and top end power (36mm ID).
Mine has 34mm ID only and I think that I will get problems to get most power out of my GTX3582R – my goal is to get >=650HP – we will see next year.
I think, my engine (E85 conversion with very big adjustable fuel pump, 1200cc injectors, blockguard, very strong M12 studs, modified hydraulic lifter oil bores for higher revs etc.) should be able to do this… only problem is to get the gas through my small manifold :-(
Another good thing is using the original ECU – In my eyes this is a better way than using free programmable ECU’s. There are too much variance like starting at low temps and so on to reach the attributes of the original ECU.
Keep it up, Barbz and Flea, I love it!
Juergen

Alright mate!!

i got my info from the dyno table in the traders section! i included Barbz in there as he is running an FC Performance map... Just Flea is too lazy to update it

Also, today is the day!!! good luck Barbz and flea!! fingers crossed for a brilliant result!!

+1 - could be very exciting

I can't wait until I win the lottery, really looking forward to my own 500bhp coupe!! Well done guys!!

Thanks,

Wanted to take a different approach this time round as I initially purchased a GTX3582 on a 62ar turbine housing but returned for a GTX3076 82ar.
Why?
I would of needed to push the boost threshold to enjoy its benefits.
Hence, i had set myself a max boost limit not to go beyond 1.8bar.
My main goal is to achieve the broadest powerband as possible rather then chasing a high power figure, for power figures sake.

The manifold is proving to be a real gem in the equation

On my current setup it proved to be a major limiting factor, so in this case the size was critical

Sorry guys, rain stopped play . Rebooked for next week now

gutted

But keeps us wanting more for next week!!

Next week it will probably snow!

Flea, are you sabotaging the weather so you don't have to face the beast?

Flea you will have to invest in your own RR mate and not have the weather hamper you. There are so many grown men just about to wet themselves with excitement over Barbz's puddle jumper! Just so happens i know a man who sells them. I've just taken one over to Austria the other week.

we need some vids aswell. would like to see it on the track

The dyno is not the problem Marco (I know Gerry btw ), I have pretty much unbridled access to the dyno I use. While I could tune any car exlusively on the dyno, I don't like or choose to do so because the road and dyno can be dynamically very different. This is even more important as the power increases and the variables become much more demanding. Ultimately most cars live and work under "tarmac" conditions, therefore I ensure that every single car leaves me prepared for this state.

You mentioned you car on Motec, if you need any advise/tuning then let me know as I am au fait with all the common standalone ECUs such as Motec, DTA, Emerald, OMEX, Megasquirt etc, and I also map Unichip. These ECUs are really very simple when compared to dealing with a factory ECU (which are infinitely more complex), and rightly so as they are commercial systems and are required to be made user friendly. Let me know your current spec and I'll advise accordingly. Certainly if you are on the same GT2871R 0.64 turbo then turning up the boost will not give you any further power as you have already reached the flow limit. There are many turbo options, and they don't have to mean any loss in response if specced correctly.

The start of this coming year I am launching a new enterprise that will move beyond Italian cars. I already tune many, many other cars, including race cars e.g. M3s, VWs, Caterhams etc, as some on here will know. Of course the Coupe is still very much on my own personal radar, and 2012 will see my final solution!

Hi Barbz,
I myself varied from a GTX3076 0,82AR to a GTX3582 0,63AR as well. There were some posts in web about a mismatch of the GTX3582r with a too small 0,63AR, which made me unconfident. Posts said that the 0,63AR is too small to handle with the big GTX compressor wheel.
Nevertheless I doubted this conclusion, because there are a lot GT3582r with 0.63 AR, which do proven >600HP – I thought that the GTX compressor wheel won’t need as much turbine revs to get same power output as the old GT compressor wheel. Therefore the GTX35 with 0.63AR should be able to make more power than the old GT35 counter part and more power than mentioned by Perrin, which did a test with a standard Subaru engine with bad VE. He found, that the 0.63 AR was too small – I could not believe this completely.
Link: http://forums.nasioc.com/forums/showthread.php?t=2110277
Meanwhile there are other results from Germany like this from a well known German tuner:
http://www.c20let-forum.com/viewtopic.php?p=905896&sid=eb1cf7b842a89909bf06aace0c1ce3d5
700HP with GTX3582R and 0,63AR at 2l engine and satisfying boost response at 2,79bar.

Therefore I decided to order the GTX3582R with two housings 0,82 and 0,63 and to start with smaller one...
A very good friend of mine started with the GTX3076r 0,82 - with very good results so far...

Good luck, keep it up, Barbz
Juergen

I read this article, thats what put me off the GTX3582

Cool

I recommend you go for a full 3.5 inch exhaust system as the 2.4L suffers back pressure issue's at the topend.

Manged to twist Fleas arm and get in for Thursday.
Moment of Truth is almost upon us.

We all look forward to this...

Flea thanks for that i'll catch up with you soon. Makes sense too mapping on the road so i see what you are saying. Only problem with car like mine is they are not road legal so it would have to be done at a track session i guess. John at Extreme has already done a few when we rebuilt my engine last. I think i need the manifold first then see where we are at with everything before we go changing turbo's. Car is very drivable just now and i have to say no slouch but i am always looking to make it that little bit better.

Sparco- is your turbo externally gated?

http://forums.nasioc.com/forums/showthread.php?t=2110277

The back to back testing of GTX variants vs GT's makes a suprising conclusion.
Also take into account that Scooby's have a very laboured pipework route for their FMIC setup, which induces higher than normal pressure drop across the system, leading to slower spool .

Beware...........HIGH BOOST HERO'S

Looking forward to the results tomorrow.If the diff holds in the box then im sure we will see a new winner.
Dont forget to give me a running commentary Bruv.

Flea..Chris in the Corvette did say Barbz's was quick.

If im honest Chris was realing me in on both the main straights at a fair rate.But didnt have the minerals on the corners.Or the grass in my case .
But think Barbz held him off.

When i went in the Vette it was definitely the quickest thing there on the day.Just didnt feel quick.

Barbz no it's not but i'm assuming your train of thought is that we switch to an external WG and at the same time change the manifold, yes?

The GTX does look like a very nice piece of kit.

Just FYI i'm running 450bhp with just over 400 lbs at 1.7 bar just now on the GT2871R. We have also changed the pipework to shorten it dramamtically which has made a big difference.

@sparco: which pipework do you speak about? Thanks, juergen

Well, if you going down the manifold route, then yes.
Do you have headwork?

We were the first to use these units on Jbt's (GTX3076 ext wg) and Angelo's (GTX3071 int wg) with awesome results. They do exactly what the say on the tin, min 10% more power at the same boost. Billet wheel Turbo's are the way to go now and you will definately benefit from a GTX unit.
What revband are you using on track?