Best turbo for 550hp I5

[Faheemo]

Hi, I have had both gt 3071 and now gt 3076.. braked 445Hp/645Nm @ 2.0 bar in engine with 3071, and 506Hp/681 @ 2.1 bar in engine with 3076..

I can`t recognise my car with 3076, but I changed cams/boost regulator/ adjustable wheel for the cam too, at the point of turbochange..

Nice curves..

What management system u running ?
500hp car sounds nice !

[Jamo]

Hi, I have had both gt 3071 and now gt 3076.. braked 445Hp/645Nm @ 2.0 bar in engine with 3071, and 506Hp/681 @ 2.1 bar in engine with 3076..

I can`t recognise my car with 3076, but I changed cams/boost regulator/ adjustable wheel for the cam too, at the point of turbochange..

Nice curves..

Have you got any dyno plots of the 3076 setup and detailed specs of your engine build?

[Billman]

Here's a clip of super40 on S2:

http://promo.pp.fi/temp/vedio/AC_drag_2007.wmv

Like said, makes tons of power. Still does not give best response when launcing.

Hi Repo,

did you know what turbine housing is he using?

[repo]

I think 14 or maybe 12 regrind from 60mm holset H1, not 100% sure.

[Jamo]

Have you got any dyno plots of the 3076 setup and detailed specs of your engine build?

Any dyno plots?

[Jamo]

I would use CompTurbo ct357 or 58, even with journal bearing You'll get spoolup before 3500rpm.

Even 55 will give almost 550hp, and spools to pull at around 3000, if tuned right.

Cheaper than Garrett as well...

Have you got any more details on these turbo's Repo?

[GazzaG60]

my sc6152 will make that no problem. spool from 3k full boost at 4k or so. nice and not so harsh. but maybe with more boost.

a lot cheaper than a GT too. i have been reliably told by 3076r will make 550 on a 0.63 or a 35r for a bit more margin.

[GazzaG60]

it is more or less a 35r yes jamo but non bb.

the sc6152 is started life a honda B16/B18 turbo to brake into the 10's or 9's at a push.

think it depends on how much boost you run jamo as to what you can make out of a 3076r. i trust my supplier as do a hell of a lot of yanks. having said that he made 531 wheel on a standard 2l 16v engine with a gt35r on there at 35psi so he aint shy of boost. you would be correct id presume at the usual up to 2 bar pressure that most s2 owners dont want to cross. me included.


id like to heat about the compturbo and also is anybody runnnig a bullseye. they are getting some good press lately.

[GazzaG60]

anybody know what the 3082 is like.

it was recommended to me for the 16vt at one point but i didn't wanna spend over 400 uk on a turbo.

[Jamo]

It's a weird no man's land of a turbo, because it's a hybrid and is not an official garrett it has the best and worse bits of a 3076r and 3582r

Basically it has a lot of lag of a 35r within a few 100rpm of it but not the high HP of the 35r.

There is a dyno plot on motorgeek

[Bram]

Hi, I have had both gt 3071 and now gt 3076.. braked 445Hp/645Nm @ 2.0 bar in engine with 3071, and 506Hp/681 @ 2.1 bar in engine with 3076..

I can`t recognise my car with 3076, but I changed cams/boost regulator/ adjustable wheel for the cam too, at the point of turbochange..

Nice curves..

I would be interested in your car setup

What cams did you use when runing both turbos?
How did you adjust your cams?
Did you use a flowed cylinder head?
What ECU and boost controller?

Cheers

[repo]

Well, what can I say about compturbo.

Installed a stg4 ct355 .63 A/r journal bearing into ex-Kalsket's RS2, which had been running with gt2871 for three or so years.

It was wery responsive at low end, gave 2 bar way before 3K rpm.

Still, the tiny turbine side of the 28 caused the egt's to creep to astronomical level, and caused the EM to melt away.

I made new equivalent manifold, and installed the CT55 into the car. Customer stated, that there is no difference in the spoolup, as it starts to pull at some 2800-2900 rpm, and gives plenty of more grunt at the top end. Without egt issues.

Stg4 55 is 55mm in / 60mm ex, and can be chosen with a turbine housing or .48, .63 or .82 A/r.

.63 A/r gives nice 520 hp / 620Nm with 3b cams and less than 2 bar. I do not have any plots to show, without asking a permission from customers. With some port job, .82 turbine, a good exhaust and higher boost the 55 can be stretched to around 550hp, and if done right, without sacrificing too much of the spoolup.

New 57 is same family with the 55. Don't have any personal experience with that, but by the statements from non-audi owners have been encouraging.

58 is already a GT series, and requires at least stg5 (63mm) turbine. For stg5 there are the same turbine housing options than for stg4.

One particularly good CT for inline fivers is the ct350, which gave nice 400hp / 520Nm from a stock 3b and 1,4 bar.

These smaller CT's prices start from 990 eur. Ball bearing adds the price for 600 eur.

What else would You like to know?

[urquattro-island]

hey

took a look at this turbo for my 2.5ltr stroker. would this not be nice`?? 995dollars

Part #: CT367
Description: TO4E T3/T4 Hybrid turbocharger with a 67 Comp wheel P trim turbine wheel .63 Non-Port T3 turbine housing. Perfect for 1.8 to 2.8 liter engines with power levels up to 700 HP
Manufactured By: Comp Turbo

[repo]

Customer dynoed a 2.2l AAN with Schrick cams, my ex manny and a 67 a month ago. Got 615hp / 740Nm with little less than 2 bar.

They tried to raise the boost, but the boost didn't obey the Apexi avc-r like it used to, so they stopped there.

After dyno, the owner noticed that the turbo was loose, and immediately after tightening the nuts on the studs, the boost was 2,5bar again.

Normally the 67 gives 2 bar at some 3800rpm with a 2,2 litre fiver. Best power normally comes at 7000-7100.

Astonishing turbo, I must say. Ask from nick +500hp, as he had one in his RS2, and changed it into bigger one. I think he still occasionally regrets it...

[gnutz2]

Is this the turbo you are refering to http://www.compturbo.com/products/in...&product=CT367

Looks very reasonable price even with the ball bearing option.

Wish i'd seen these before i bought my garret.