Cheers for sharing the results Trappy!

Your car: 416bhp and 329lbft vs my mate's: 338bhp and 322lbft running a hybrid turbo (copy of my old GT28RSR with a CNC wheel)

Your car on paper has 78hp and 7lbft more.

The result: you both run 100-200kph in 10s.

Agreed,
Yours only just did that with a gtx3076.

As I have always said ,the easy way of seeing what a car will do is calculate an average 90ve engine and work out the compressor maps online for all turbos .

Easy to predict within 5% of the power it will get .

So jack your 200bhp shy of what your turbo can do ,I would get it put back on dyno .

Why use 90%VE? Most modern engines are better than this and a decent forced induction engine will be miles better. Even a decent N/A engine can be over 100%VE

The GT2871r is a very good turbo for people wanting to break the 400BHP mark and has been proven time and time again. This was my result on FC performances Dyno and the heartbreaker dyno (Surrey rolling road) with standard head, cams, inlet manifold and exhaust manifold.

http://www.fiatcoupeclub.org/forum/ubbthreads.ph...rue#Post1452942

This was running Shell Optimax 98 ron (Many think its still like the 99 ron V power but it changed a few years back)

This is now my old spec so more to come this year.

This is 20VT with gt2871R on RON 98 (external wastegate)on 0.64AR :

https://www.youtube.com/watch?v=qL_78vZ3GeM

https://www.youtube.com/watch?v=kIRPXdWSOgo

I think we've proved that a GT2871R 0.64 has repeatedly given well over 400bhp on more than one dyno

Its therefore reasonable to presume that Garrett's own figures are being a bit cautious.

90% factors into the equation many variables and is typically used in power predictions.

Julien, for me 200kmh on the clock really is 185km/h on a gps so a video like that proves nothing

Nigel, I don't agree with your conclusion, sorry. It just doesn't make sense to deny facts like these:
- 418bhp does 100-200km/h in 9.9s.
- 328bhp does 100-200km/h in 10.1s
- my 350bhp does 100-200km/h in 9.9s (I only tried it once today and am pretty sure I could be a bit quicker)

OR perhaps we should ignore compressor maps, maths etc and say that me and my mate have got more than 400bhp

Edit: I did anther run and managed 8.9s. For what it's worth here'so a picture (got to borrow Race Logic and measure a few more times).

In 3rd gear 1b @ 1750rpm then 1.7b @ 3200rpm

Oh boy, I forgot I'm using MAP sensor so what I thought was 1.7b (170kPa) @ 3200rpm was in fact 0.7b of boost. Doah!

...and this is one of the reasons that my car always produced more power than others with a GT2871R. I've just checked some of my old posts and I used to have 1 bar of boost before 3,000rpm. The benefit of a flowed head and high-lift cams....

The more I investigate my tuners work the more interesting things I discover which need to be addressed. I used to make 1b at around 3.1k rpm with the same setup I have now.

My boost control system has recently packed up again... First it wouldn't boost above 1bar and now it's not controlled in the least

However...

...this means that, in fifth gear, 1bar at 3,050rpm and 1.7bar at just UNDER 3,500rpm. It's not mapped for this so I daren't go any further, but I do get the feeling that this would be serious fun if it was tuned to take full use of this turbo's capability - it spools like an absolute monster

You can see why I tried 2 bar - it was hilarious (and fairly short-lived....)

However, when it spools that quickly, traction can become an issue

Without a Quaife, I could imagine it being a real handful too. I realised this morning that the old 'digital' throttle pedal is back. When Leighton mapped it, the accelerator pedal made it feel like an analogue switch. Now it's all or nothing. It makes it feel much faster - like it's effortless fast but. realistically, it's just rubbish.

Will get it sorted next weekend hopefully.