Beiträge von Acki

The displacement is different but on a turbo engine the only effect is the needed boost for the same power and the spooling of the turbo.
When a Turbo can handle 400hp, it's no difference when you have 1.4 or 2.0l.
Only the torque curve is different - of course. More displacement, more torque. Killer applications like a 1.9l 8V SOHC with GT25R or GT28R don't have more power, but much more torque.
The valves have effect on the surge line (more circulation loss) and the boost you need for the power.

In the opel scene the normal "street" use turbo is a GT3076R. Since some month the GTX3076R is the most used turbo.
Sure, some guys install a GT28xxR, but most guys have 500-600hp (bolt-on Kits, I made intake and exhaust manifold for these kits).

About the GT2876R, the bigger compressor wheel causes bigger lag. At higher revs you have the problem that the turbine wheel is too small compared to the compressor wheel (it's like a ratio). The exhaust pressure raises and the burned gas can't leave the cylinder.
GT2871R didn't have these problems!
An external wastegate can lower the high rev problem with the GT2876R but only compared with an internal GT2871R.
The Flowmap shows only a difference of 5HP - that is the 3rd point against the GT2876R.
When you are happy with the GT2876R, good. I wouldn't be happy. You can drive what you want.
More I don't write about this turbo.

500 dyno HP or feels like 500HP?
Pictures and Details?
Need a clutch for my 2871r

Also bei Walbro Pumpen wird der extra befestigt und nicht nur so drauf gesteckt, ist auch ein anderes Material.
Aber das mit dem Sieb ist schon ne gute Sache, die Pumpe kann auch mehr wenn es sein muss.

But at this Engines you can compare same setups with different charger.
Rally Cam - I would think the same. Will start with 272 NA cam and look what happens, then I will simulate other cams the power isn't enough
Maybe 2876 works much netter with external Wastegate but I think biggest 2871 will spool faster and hold the power longer compared with same power 2876 because Compressor Wheel is too Big.

Hehe. Yes but Klasen Motors had some 2l Opel Engines on the dyno - compared with gt2871 and gt3071/76 the turbo loss too much power at high revs. With higher boost the exhaust pressure raises too strong.
You can install every turbo you want, of course

Ich glaube schon.
Hatten selbst das Problem das die Klammern im Tank das Netz immer beschädigt hatten...

Sieht Klasse aus! Aber Unterboden usw würde bzw hätte ich noch mitlackiert.

Cinquecento Pumpe, die hat ein Metallsieb. Nie wieder Stress.

Lambda bastel ich gerade. Mit der neuen Firmware ärgert mich der Kabelbaum noch - Steuergerät ist ab und zu stromlos...
102 Oktan von Aral, Ultimate 102
E85 hat noch mehr.

Weil der Ausgang manchmal nicht zurück gesetzt wird scheinbar.
Klos ist der Software Freak... Oder ich muss mal ne neuere Firmware aufspielen und testen.
Klemmen es demnächst um. Motor läuft ja wieder.

So wichtiger Hinweis für Kabelbaum neumacher.
Zündspule auch über das Benzinpumpenrelais versorgen.
Gibt zwar eine Engine Stall Erkennung, die dauert aber zu lange (lol?!).
Jedenfalls passiert es dadurch hin und wieder das die Spule weiter geladen wird wenn der Motor ausgeht (abgesoffen, abgewürgt what ever).
Resultat ist dann ein abgebrannter Treiber.
Dicke Sache...

264°... adjustment of the inlet timing is limited because of exhaust timing...

Cry, what did you mod on the intake manifold? Pipes are too small and too long.
Exhaust, external wastegate. Lowers the back pressure.

Not easy with our engine because of bad manifolds (intake/exhaust) design and camshafts setup.
You have to test the cams with different parts.

Die Düse ist doch nur rauszuziehen oder übersehe ich gerade etwas?
Exlua war mit seinem 1.0er solange gefahren bis der Spritfilter kaputt ging und der Dreck vor der Düse sich angesammelt hatte...

Use a bigger wastegate and you won't have any trouble with high revs.
But you also have to exchange the intake manifold. The standard manifolds create a fast falling torque curve at 5500rpm.

Look here, 2876r is rated 5hp more than 2871r.
But the flow maps are trusted curves, most turbos can make 5-10% more power - but often the engine isn't good enough to reach this real limit of the turbo.
In germany some guys run a GT3582R with 700hp @3bar boost.

http://www.turbobygarrett.com/turbobygarrett…1R_780371_2.htm
http://www.turbobygarrett.com/turbobygarrett…6R_705330_1.htm

500Hp you can run with the Turbo. 2876 Can't more.
Flowmap of 2876 Shows that this Turbo is Big Shit Nobody with lese than 4l was ever happy with this Turbo.

8V?

Iceman has a 2876, too Big compressor wheel. Its a V8 biturbo charger - low end torque.
I think the 28 will also become GTX soon
GTX30xx is crank. GT2871 with big Trim seems to be enough for a low 10 or maybe a 9.

Den hab ich auch

Bilder vom Abkrümmer usw.?

Welche AFR Werte fährst du?

So Antriebswellenflansche könnt ich gebrauchen