924Board.org

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

Yesterday I bypassed bad connections at my vacuum amp.
Today the car runs the closest to what I think a working 924 Porsche should be.

Better shifting.(drops down quick between shifts)
Steady idle.
Better acceleration.
Way better high end torque.( 5500 rpms)
Smooth even exhaust note.
Better voltage ( don't ask me why)

If anyone has power problems check and replace all those vacuum lines!
I thought the vacuum amp connections were good- but they were not.
It made a major difference.
I'm going to replace all my lines again with silicone ones.
Good vacuum rules on this car!!!!!!
The new dash mounted vacuum gauge is a lot of fun to watch too.!
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

dpw928 · Joined: 02 Nov 2002 Posts: 1860 Location: owasso, ok 74055

A vacuum/boost gauge is even MORE fun to watch.

Dennis
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81 931 5 sp
78 928 5 sp Silver
78 928 AT Euro Black

D Hook · Joined: 02 Nov 2002 Posts: 3158 Location: Omaha, NE

And if you haven't replaced those rubber boots from the fuel distributor to the throttle body, do that too. They may look good but they crack around the clamp area, especially if you've removed them a few times. It'll make a world of difference and it's cheaper than most of the other parts that cause the same symptoms.

Good call on the vaccum lines!

Lizard · Posted: Tue Oct 12, 2004 12:31 pm Post subject:

well you could always do what I did,

the only vacuum pieces on my car are the distributor advance, and the brake booster, I have NO other vacuum compnants, or lines, yes even the AAV is gone.
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3 928s,

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

So Lizard, care to elaborate on how you pulled that off?

Two questions...several of my vacuum lines have clamps, several don't. Most of them look original, with that funky heat resistant woven material over them.
1. If I go to the trouble of "upgrading" everything, what type of line should I use (bang for the buck)?
2. Should all of the lines be clamped?
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erstwhile owner of just about every 924 variant ever made

macBdog · Posted: Tue Oct 12, 2004 3:48 pm Post subject:

Yea im interested in this as well because most of my vacuum plumbing is original and that weaving stuff is breaking down. What should we use?
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1979 931 with a 350 chev
1973 911E with EFI

leadfoot · Posted: Tue Oct 12, 2004 7:18 pm Post subject:

what are the vaccum gauge readings at idle, does it fluctuate at cold start??
my idling and performance improved greatly after using some liquid gasket sealer on some of the lines.

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

I would keep all the original vacuum lines. They cause no performance drop but help conserve fuel and help with mpg.
14-16 vacuum at idle.
http://robrobinette.com/hoses.htm
I'm going for the red also.

_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

augidog, since you've done this, do you have any idea how much and what sizes are required on the NA 924s? Did you use zip ties or metal clamps?
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erstwhile owner of just about every 924 variant ever made

MALUKIA3 · Joined: 13 Dec 2003 Posts: 82 Location: NY

bypassed the connections at the vacum amp???? Did you work around it somehow or make better connections?

The rubber part on my 79 is in bad shape. I've dipped it in that liquid flexible rubber stuff thats used on electrical connections etc. Worked OK for a while but the cracks are beginning to reappear. If there is a way around this piece or if you know a source for a new one please let me know.

I do want to keep the vacum connections intact.

Thanks,
Don

blargonator · Joined: 22 Sep 2004 Posts: 100 Location: kalamazoo MI

i asked a while ago and i figured out from the haynes manual that my car is a early 77. i have been having problems figuring out the wiring because i have many wires attached to nothing. could someone take basic pics of where the cables start and end?

Lizard · Posted: Wed Oct 13, 2004 1:26 pm Post subject:

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

So, anybody have any idea how much length to order? I can figure out the sizes, but it would be good to know ahead how much to get...10ft? 20ft? 30ft?
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erstwhile owner of just about every 924 variant ever made

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

Give me a couple days and I'll tell you my order
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

http://www.hosetechniques.com/catalog_products.tpl?cart=1098229601887858&category=Universal%20SVH%20Kits

Universal sampler kit seems like enough.

They have some nice slit and cover techniques for old hoses.
My fuel lines look like crap.
What do you think on the colors? Are the colors too showy?
I'm probably going gloss black, keeping it simple.
what do you think?
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.