2 quick questions (V5 motor & turbos)
2 quick questions (V5 motor & turbos)
(OP)
1. Does anyone know how the 5th cylinder is orientated in Volkwagen's VR6 based V5 engine? We know 5 cylinder engines tend to have vibration issues, but I'm curious about the V5, and no one I talked to seems to know the answer (and they are actually wondering themselves)
2. How does a variable geometry turbo (or a compressor, either-or) work?
thanks
2. How does a variable geometry turbo (or a compressor, either-or) work?
thanks





RE: 2 quick questions (V5 motor & turbos)
-=Whittey=-
RE: 2 quick questions (V5 motor & turbos)
I don't know how they productionise it, but while I was at uni they were messing about with nozzle angles and throat dimensions on a turbo. I'd guess that a moveable flap would do the job.
Cheers
Greg Locock
RE: 2 quick questions (V5 motor & turbos)
RE: 2 quick questions (V5 motor & turbos)
Back in the early 1980's. Ricardo designed a V5 diesel engine for Oldsmobile, about 3.5L capacity. It had a conventional angle, probably around 72°, and the rotary injection pump was mounted where the 6th cylinder might have been, had it been a 6. The engine got close to production, but then the shortcomings of the other two Olds-designed engines killed the diesel market.
All turbo manufacturers have to have Variable Geometry Turbos nowadays; modern diesels demand them for performance and emissions reasons. There are several different mechanisms; variable angle guide vanes (Honeywell), moving sidewall (Holset), and others.
PJGD
RE: 2 quick questions (V5 motor & turbos)
If I understand the VR6 VW engine you are referencing, its a 6 cylinder engine, not 5. The layout uses a single cylinder head and the cylinders are staggered in 2 rows on the same bank. The stagger between the rows is +-15° Kind of like this bad ascii art below. I hope it comes out ok. If not, see the link below for a better drawing.
[o o o ]
[ o o o]
PLAN VIEW OF TOP OF CYLINDER BLOCK
Using IE 5.0 or better, go to this site
http://catalog.exist.ru/
There is no www in front on the URL. At the opening page, put the dot under the VW mark and select "1995" in the year box, then hit the red "next" button.
From the menu select "Corrado (1989-1995)" Wait until the picture shows up, then hit "next." Select "engine" from the menu and wait until the picture shows up, then hit "next." From the menu select "cylinder block with pistons and oil sump" for the 2.9L engine. There's your picture. If you hit next again you'll get all the OEM factory part numbers for the parts shown in the picture. You can look at the crank, cylinder head, and other engine components as well if you navigate around a little. For Audis and VW's its a VERY useful site that starts off in Russian but it's mostly in English.
Enjoy!
Chumley
RE: 2 quick questions (V5 motor & turbos)
RE: 2 quick questions (V5 motor & turbos)
Look at the same site again for the 2000 model year and select the Bora model. Then select "engine" as before and go to the "cylinder block with pistons oil sump" drawing. There it is! A 2.3L staggered I5 configuration. An interesting unconvertional design to say the least.
Chumley
RE: 2 quick questions (V5 motor & turbos)
Rod
RE: 2 quick questions (V5 motor & turbos)
RE: 2 quick questions (V5 motor & turbos)
Are the bores parallel, or is it really a V? If it is a V, are the piston tops slanted? Does the headgasket have round or oval holes?
RE: 2 quick questions (V5 motor & turbos)
http://www.vw.com/engine/index.htm?locnav=home#
Balancing must have been interesting...
cheers
Jay
RE: 2 quick questions (V5 motor & turbos)
http://catalog.exist.ru/
For some reason I cant get it to work. Also I dont know if you can get the V5 in the golf/bora. But i know that here in Canada it comes in the audi S4.