Vorteck schrieb:
wob-i, hast du meinen Komressor nicht auf dein Auto geschraubt ??
Z hin oder her, je einfacher die Technik desto schlechter läuft sie. wenig anfällig aber auch kaum effektiv. Schub brachte der Lader nur ab 4000, alles darunter ist keine Hilfe...
Hi
Die Technik ist sehr einfach und auch alt. Das sind Kompressoren wie man sie im 2. Weltkrieg in den Flugzeugen brauchte.
Wenig anfällige zu sein ist ja gut. Effektivität ist relativ. Wenn man richtig Schub untendurch haben will, dann gibts keinen Umweg um einen Turbo. Obwohl objektiv ist eine Leistungszunahme bei den Kompressoren auch unterhalb von 4000 messbar. Dazu habe ich einen englischen Beitrag angehängt.
Mir gefallen die Z-Kompressoren weil sie untendurch nicht viel bewirken wo ich eigentlich mit der Motorencharakteristik auch zufrieden bin und ab 3000-4000U/min gibts etwas mehr Dampf, gerade da wo mir der Motor etwas zugeschnürt vorkommt. Rund 270-280PS reichen mir vorläufig und ein Turboumbau mit rund 300PS würde mir in der Schweiz mit den Eintragungskosten von rund 3000€ (im Vergleich zu den 40€ beim Kompi) um einiges teurer zu stehen kommen.
Anhang:
Z ENGINEERING KOMPRESSOR
Started the install the night before last with removal of the stock airbox and relocation of the charcoal cannister, and drove it around yesterday with the open filter stuck on the end of the MAF.
Tonight , I finished the install with only a few annoying glitches. It wasn't exactly a 4 hour install from scratch to be sure, although with all the various emmisions stuff moved out of the way it might be a 4 hour re-install someday.. I'm actually still waiting for a one way valve from Jim Chu but in the meantime I've got the crankcase vent going into the intake directly from the PCV. I know some people vent it to atmosphere so I'm not all that worried, but you'll note the black hose looks out of place running over the top (it's an inch or two too short without the valve in place), so I'll get some new photos up when it's all set.
Anyway, drives fine. I did a bunch of G-tech runs the night before installation so I'd have some baseline (without a dyno). Tonight I ran them again and verified that it does indeed make more power all the way from 1k rpms on up. (I've got mini-plots for acceleration G-forces in the 1k-3k range for 2nd-4th gear, and max accel in all gears, before and after) The real fun starts at about 3500rpms and and ends abruptly at 6300 rpms. I HATE the rev limiter. At this altitude I've got 15% less oxygen and the engine is still building more power hard when it slams into the rev limiter. I'm sure I could take it to at least 6700 rpms before I'll make the same boost as at sea level, so I'm not even working the blower hard right now. Maybe I can talk Garrett into making me a high altitude version of his *someday* Z-eng chip, assuming he doesn't do away with the rev limiter anyway.
Oh, and I noticed also this chip being based on the stock chip, the revs fall the instant I let off the throttle. My old Garrett v.10 chip would hang the revs for a second when I let off the throttle without load (during a shift) so I got a hard nice pull in the next gear. I remember being mildly annoyed with it at first (I know Garrett would remove that feature upon request), but now I'm so used to it, the old behavior pisses me off. This chip drops the revs so damn fast I've bogged a few times. Worse if you happen to hit the rev limiter and then shift, the revs drop instantly and the power doesn't come back for a second. I have to go back to holding some gas myself between shifts, without hitting the rev limiter in neutral. Ugg.. Makes double clutching and heel-toe a bit iffy too because I'm fighting rapidly falling revs at the same time the blower makes it rev up much faster so it's totally trying to hit a moving target.
Anyway, I've only driven it an hour or so in the dark. 1st is over instantly, 2nd is fun but too quick too.. 3rd is the new 2nd gear, and 4th and 5th are just sick over 4k rpms. I launched it up a big steep 3 lane hill at 70mph and let off the gas 2/3rds of the way up at 130mph in 5th, still pulling.
The problem is the power comes on so smooth down low, and builds so rapidly above 3500 rpms that most people would swear it's not making any additional power below 3k rpms over stock, but my G-tech, while perhaps not terribly precise, is at least very consistent and it says I'm making more power across the board. It feels slow sometimes, even when the speedometer is zipping into the triple digits. I can see howsome people would diss it for being slow, but it's perfect for me. I drive my car in the snow all winter, and as long as I stop at 3.5k,it'll do just fine.
Time to sleep..
MfG