1979 930 Pinging but why now? - Page 2

Porschepilot79 · 03-14-2009, 09:41 AM

Quote:

Originally Posted by beepbeep

Edit: just saw your pics.

If the blue hose connected to wastegate side is open, turbo will deadhead and (if switch is working) you will expirience "dash-in-your-face" syndrom.
You are also missing a banjo-nipple from the top of wastegate vent. That one should be vented to atmosphere.

If somebody bypassed the switch (many do when installing 1.0 bar spring), you will have no margins whatsover.

I think that has been done since boost was not cut. I will soon start a thread on my car to help discover what has been done but talking to a few Porsche shops that know the car well said the 28 year owner has built a top motor.

After research I do know it does have the 7006 Turbo so far and Twin plugs.

If something happend to the engine would it have smoked by now? It has no smoke at all even on cold start nor does it feel like anything is wrong?

Porschepilot79 · 03-14-2009, 09:43 AM

Quote:

Originally Posted by spuggy

If that hose comes off the top of the factory WG body, it should be "open to atmosphere" so that air on top of the diaphragm is not compressed, allowing free movement of the WG valve. It is usually routed to the airbox or otherwise arranged so that small birds don't nest in it...

If that hose comes off the middle (side) of the factory WG body, it's supposed to be the boost signal, and should be connected to the pressurized portion of the intake somewhere. Without it connected, there won't be any boost regulation (WG won't open because it'll never "see" the boost).

If it's an aftermarket WG, check what the manufacturer says the ports do...

Well the top of the WG is open it seems so should I put on a bango fitting there and put a hose to the air box or is it ok the way it is??

beepbeep · 11:06 AM

Quote:

Originally Posted by Porschepilot79

If something happend to the engine would it have smoked by now? It has no smoke at all even on cold start nor does it feel like anything is wrong?

If compression and leakdown checks OK and there is no smoke:

everything is fine and you just dodged the bullet! Unfortunately, even small amounts of knock will shatter top compression rings to pieces.

Top vent goes to open air (but it should have a banjo fitting and short line to keep out the moisture though)
Bottom hose should go to boost line.

This is the stock installation. Bottom metal line is going to intercooler and top one is just a short piece of pipe.

Porschepilot79 · 02:54 PM

[QUOTE]

Quote:

Originally Posted by beepbeep

If compression and leakdown checks OK and there is no smoke:

everything is fine and you just dodged the bullet! Unfortunately, even small amounts of knock will shatter top compression rings to pieces.

Top vent goes to open air (but it should have a banjo fitting and short line to keep out the moisture though)
Bottom hose should go to boost line.

This is the stock installation. Bottom metal line is going to intercooler and top one is just a short piece of pipe.

Ill have to see about the compression and leakdown at this point it runs and drives like nothing is wrong and I will also look into putting a line on the top of the WG to improve on the current setup. So any pinging would case the compression rings to shatter? So the engine could be tested to be good even with shattered rings?

I still need to find the place this hose went in the first place?? The only place on the IC that a hose would fit, it is taken? I was hoping from the pictures someone might comment on this? It can been seen going from the IC to the throttle body. Is this how everyones IC is?

A930Rocket · 03-14-2009, 01:18 PM

Do you have a stock intercooler? I want to say there is a fitting there for the line from the side of the WG.

Correct me if I'm wrong, because it's been a long time since mine was stock...

Porschepilot79 · 03-14-2009, 01:30 PM

Quote:

Originally Posted by A930Rocket

Do you have a stock intercooler? I want to say there is a fitting there for the line from the side of the WG.

Correct me if I'm wrong, because it's been a long time since mine was stock...

No its an upgraded IC and the only one fitting is on the IC and I put a picture of it with a hose going to the throttlebody. Is this the way it is supposed to be?

A930Rocket · 05:02 PM

No. What would it be doing? Run your WG line to the intercooler. Make sure it's the pressure line and not the vent on top if the WG. I would say plug the line off the TB but where is your dizzy line run to? It should go to the TB. At least mine is.

Quote:

Do you have a stock intercooler? I want to say there is a fitting there for the line from the side of the WG.
Correct me if I'm wrong, because it's been a long time since mine was stock..

No its an upgraded IC and the only one fitting is on the IC and I put a picture of it with a hose going to the throttlebody. Is this the way it is supposed to be?

Porschepilot79 · 03-17-2009, 08:30 AM

Quote:

Originally Posted by A930Rocket

No. What would it be doing? Run your WG line to the intercooler. Make sure it's the pressure line and not the vent on top if the WG. I would say plug the line off the TB but where is your dizzy line run to? It should go to the TB. At least mine is.

Thanks for your help! Im trying to learn about the parts and how they work on this amazing engine Porsche Engineered.

What is the dizzy line? I took the intercooler off to take shots of the hose coming off the throttle body and going into the intercooler. So basically its going from one pressuered place to another which makes no scene to me? I thought the WG hose would go on the intercooler always but ???

Here where its connects to the TB

Here is a longer view of the same hose off the TB

Where does this go on your car or all 930s for that matter? Thanks!!

Miguel Antonett · 09:15 AM

Where does the blue open hose facing up from the left - on that shot - hook up? The orientation, length and location of that hose appears to be the one going to the WG from the IC. I have no clue of the purpose of what is connected to that IC nipple now - going to the TB.

Porschepilot79 · 03-17-2009, 09:17 AM

Quote:

Originally Posted by Miguel Antonett

Where does the blue open hose facing up from the left - on that shot - hook up? The orientation, length and location of that hose appears to be the one going to the WG.

Yes, that is the WG hose that was not connect which Im trying to figure out where it went befor the work was done. Since the spot on the IC was taken by the hose off the TB, I didnt know where to put it or how people have there 930s routed? Think I should start a new post on the hose to see if someones knows where and what the TB hose does and goes?

Thanks George

Miguel Antonett · 03-17-2009, 09:28 AM

That left open hose from the WG connects to the IC right at the IC nipple FOR SURE. I believe it is even the right lenght to do so.
The other one from the IC to the TB - I don't know what that is. I've never seen that connection before. Sorry

Porschepilot79 · 03-17-2009, 11:05 AM

Quote:

Originally Posted by Miguel Antonett

That left open hose from the WG connects to the IC right at the IC nipple FOR SURE. I believe it is even the right lenght to do so.
The other one from the IC to the TB - I don't know what that is. I've never seen that connection before. Sorry

Ok cool then Ill start with that? I looked on the parts diagram and that it helping and also that sticker under the declid might also help so Ill see what I can find out.

Once I get this sorted out I can work on the rest of the tuning that others mentioned here.

Porschepilot79 · 03-17-2009, 03:16 PM

Halleluyah! I have finally figured it all out. I spent a lot of time searching here an found out important information on some the vacuum system of the 930.

So that line in front of the TB goes to the thermo time valve which in turns goes to the distributor. I can Plug the TB because my car has a crank fire and has no distributor. Here is a link that has some good info on this system

Aux air valve questions

Now I need to see how important this Auxiliary air valve is because my intercooler doesn't have the fittings for the hose that come off of it. I guess modified cars disable these systems for performance?????

A930Rocket · 03-17-2009, 07:08 PM

You're getting there. You can run the line from the TB directly to the Dizzy. While your at, remove all the smog stuff....

[QUOTE=Porschepilot79;4550048]

So that line in front of the TB goes to the thermo time valve which in turns goes to the distributor. I can Plug the TB because my car has a crank fire and has no distributor. Here is a link that has some good info on this system

[QUOTE]

Porschepilot79 · 03-17-2009, 07:44 PM

[QUOTE=A930Rocket;4550554]You're getting there. You can run the line from the TB directly to the Dizzy. While your at, remove all the smog stuff....

[QUOTE=Porschepilot79;4550048]

So that line in front of the TB goes to the thermo time valve which in turns goes to the distributor. I can Plug the TB because my car has a crank fire and has no distributor. Here is a link that has some good info on this system

Thanks man im trying! I getting a crash coarse on the 930 engine hehe.

So what is this Dizzy???? I don't have a smog pump, if thats what you mean by smog stuff. It also has headers that look like the B&B kind as far as I can tell?? Im going to start a new post about unraveling the mystery parts of my car. It should be exciting!

Also, what was the reason that someone block the hose on the Auxiliary air valve?? Should I hook it back into the Airbox?

A930Rocket · 03-17-2009, 08:37 PM

My mistake. The dizzy is the distributor. You don't have it so...

A930Rocket · 03-17-2009, 08:39 PM

Pull the plug, hook it back up and see what happens. It can't hurt it.

They may have done it because the decel valve was bad? Or who knows...

Quote:

Originally Posted by Porschepilot79

Also, what was the reason that someone block the hose on the Auxiliary air valve?? Should I hook it back into the Airbox?

Porschepilot79 · 03-17-2009, 09:21 PM

Quote:

Originally Posted by A930Rocket

Pull the plug, hook it back up and see what happens. It can't hurt it.

They may have done it because the decel valve was bad? Or who knows...

But thats not the decel valve? That would be in front of the engine. I have been studying the diagrams and how stuff works and you can see it here unless I made a mistake?

930gt-40r · 930gt-40r's Garage

Quote:

Originally Posted by A930Rocket

Pull the plug, hook it back up and see what happens. It can't hurt it.

They may have done it because the decel valve was bad? Or who knows...

could be that the auxilery air valve was bad (causing high or F**ked idle)?

Porschepilot79 · 03-18-2009, 07:22 AM

Quote:

Originally Posted by 930gt-40r

could be that the auxilery air valve was bad (causing high or F**ked idle)?

Would it cause the care to have a hard cold start??? So far thats one problem I will need to solve. Im not sure if the hard start is from the WUR or AAR?? Thanks