What is this and why is it not hooked up?

[TRP951]

I beleive its all 951s up to the turbo s had the venturi.

Damn marcone you got lucky they didnt give you that ticket for 2000

[nize]

Originally Posted by kdjones2000

Sox, I thought that venturi's are only on '86 951's, and that they removed them from later models? I thought that Marcone's is an '89, so it wouldn't have one?

Cheers,

Keith

this is true. venturi was deleted by the porsche factory starting 87 model year.

[myskyon]

both my 87's had the ventury tube. i thhink it was 88 they stoped putting it on.

[soxnail]

My bad...Should read the signature line on the posts. Some 87s had the venturi some did not, but from 88 on wards it was gone. Sorry guys.
Sox

[nynor]

i could have sworn my '88 has the venturi tube.

[nize]

Originally Posted by nynor

i could have sworn my '88 has the venturi tube.

i'd be curious if it does. can you post a photo?

[nynor]

let me see if i can find one in my archive.

[nynor]

isn't this the venturi?

don't worry, all that nasty rubber was replaced!

[nize]

that does look like it. odd, it's the first i've heard of a ventiri on an 88.

[ronin]

Originally Posted by nize

this is true. venturi was deleted by the porsche factory starting 87 model year.

89

[nize]

my first 88 did not have the venturi and i know that was how it came stock. neither did my second 88, though it's possible the p.o. changed it.

[kdjones2000]

I've never taken the intake off of mine, so I can't say either way. Just heard that on Rennlist forum.

What exactly is the downside of having the venturi, other than it removes a bunch of the vacuum hoses? I have seen a bunch of guys advertising "Venturi delete" in their car descriptions, but have no idea what the big deal is.

Cheers,

Keith

[soxnail]

The big thing is that it simplifies hoses and lay out. The smaller the number of hoses/connections less to leak and go wrong. As far as I know there is not performance differences. (But the distance of my knowledge some times only extends a few angstroms )
Sox

[nize]

the plastic venturi check-valve also fails easily and causes problems when it does.

[nynor]

what kind of problems can the check valve cause? the reason i ask is that a friend of mine with a '87 BMW 325is (i know, i know) is having major idle/power issues and it has an IDENTICAL venturi part.

[nize]

idle/power issues. if i remember correctly, it causes erratic isv operation.

[nynor]

now that we've completely hijacked this thread...

so, you are saying it COULD be the venturi tube? also, the intake boot is very old and cracked. i've already advised him that this should be replaced and thought that was where we'd start.

[nize]

yeah, you could verify with a vacuum hand pump.

[soxnail]

Iirc it just runs the vacuum to the brake booster...
SOx

[nize]

everything you want to know about venturi;
http://forums.rennlist.com/rennforums/showthread.php?p=5022592#post5022592