ehall

Of what turbo do you speak?

xtaC

This is relevent to my interests also

pole position

Reading his sig will reveal that is a Garrett 3076.............still a relative small turbo.

spoolin51

Since patrick is out drunk, ill step in and say
Yes, he is absolutely talk about the gt3076r

333pg333

Fixed.

Yep, it's the GT3076. Sure, it's not a BIG turbo and it totally depends on what you want out of your car, but my belief is that this turbo would suit 90% of guys with 2.5s. Of course you can go bigger and get a more pronounced 'Whack', but I've had that. It's fun for a while and maybe it would suit a few guys, but it isn't ideal especially with the stock gearing.
When I get back I'll see if I can post some video. You will have to bear in mind that I have the shorter final drive ratio though. In fact with most 2.5s I would also suggest going to the S2 ring and pinion in combination with this or other similarly sized turbos.

evil 944t

From Garretts website, Gt3076r, 310-525(crank HP) so, I wouldn't say that this is a small turbo. Any larger on the street and your going to start to feel the lag.

Duke

I agree, that's not a small turbo. Especially not in this community where there are extremely few cars above 500 crank hp.

Patrick, are you sure it's not the increased midrange power that makes it feel like it has less power on top vs the other turbo's?
With a broader and more linear powerband the top end can sometimes feel a bit "dull".

Chris White

The Gt3076 is a nice turbo, I am putting one on a 3.0 16v 9:1 street engine. Should spool fast...real fast.

Chris White

I agree with Duke - sometimes a turbo with a very wide power band does not 'feel' as powerfull as a turbo that has a noticable on/off effect.

evil 944t

Chris, have you run one? Make sure you put the right one on. They make a few versions and "smaller" versions may be too small for that engine. Personally, I'd be looking at a small gt35 for that engine.

95ONE

um. Weren't we originally talking about the dinky little turbo in the picture? Definately NOT a GT30R. That thing looks smaller than a gt28!
A GT3076r is Labelled as "mid" size turbo, yet it spools similar to a small frame while giving a damn good top end. Truly an excellent turbo.
Chris, Ill see you a 16v 3.0 and ill raise you to 10:1 compression. E-85 twin scroll. I wonder if Ill see boost off idle? lol.

EDIT: ok.. just talking about 333's (Patrick) turbo.. Got it. 1.5bar. or 23psi.. What power did you see with that psi?

Chris White

Noramlly I would agree - in fact the track 16v has a Gt35 - but I like my street cars 'under tubrboed' a little. I get all my big HP jollies out on the track, for the street I want a very quick spool and boost down as low as possble. My wife's Audi S4 (old twin turbo type) gets up to 80% of its max torque by 1700 rpm.

With the 9:1 and street gas I will not be running big boost so the 'little' Gt30 should do the job nicely. Hopefully it will be up and runnign in a month or so...

evil 944t

So, you haven't run the gt 30 yet, Which gt30 are you using? Have you run the gt35? Whats your impression of the gt35? What size is the motor and how many valves?

333pg333

You might be exactly right there Duke. I think the term 'Dull' is an excellent choice for what I'm experiencing. However it hasn't been in the car that long and we haven't done any dyno or real tuning of / for it. We've just played around with the fuel a little. It certainly 'feels' like it flattens right off past say 5500rpm but the two turbos are quite different so not a great comparison. Stupidly we changed some things on the suspension, swapped the turbo and have been running some Hoosiers...but I've taken 2 seconds off a 1.21 lap time at Oran Park with the new arrangement however I'm not quite sure what's the cause lol. The turbo itself is fantastic around any of the twisty bits and corner exit. It's pretty good in a straigh line too, just feels like it flattens off compared to the VR 5 is all.

Haven't dyno'd it yet Bruce. Not sure how far I'll take this setup either as I've seen my 3L in the flesh the other day. It's on the engine dyno but 6 hours later we still couldn't fire it up due to a faulty cam sensor!!!! Damn long way to travel to get that close and not see the $%^&$%^#$%^ thing start!!!
Erg.........

evil 944t

What Patrick also needs to add is that his timing map is set up for a huge turbo. He is probably leaving a ton of HP on the table as well as response.