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Search: Posts Made By: VonK :: Retired
Showing results 1 to 25 of 482
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Forum: S4 / RS4 (B5 Platform) Discussion
05-19-2008, 04:29 PM
Replies: 17
Views: 529
Posted By VonK :: Retired

Yeah, wish we could do before/after tests under...

Yeah, wish we could do before/after tests under identical conditions. :)
Forum: S4 / RS4 (B5 Platform) Discussion
05-19-2008, 12:07 PM
Replies: 17
Views: 529
Posted By VonK :: Retired

It's a trade-off. Beyond a certain point, more...

It's a trade-off. Beyond a certain point, more timing yields less power (over-timing).
Forum: S4 / RS4 (B5 Platform) Discussion
05-13-2008, 11:36 AM
Replies: 13
Views: 519
Posted By VonK :: Retired

Mechanically.

The screw is secured with Locktite. A drop of Acetone, followed by WD-40 will allow it to be dislodged carefully. Don't bugger the screw!

<b>You should know what you're doing before you screw with...
Forum: S4 / RS4 (B5 Platform) Discussion
05-13-2008, 10:16 AM
Replies: 15
Views: 658
Posted By VonK :: Retired

The reason I asked is that I almost replaced mine ...

... until I found stealthy cracks in the very fragile silicone rubber hoses. It took a pressure test and a stethoscope to find them,

<img src="http://209.128.70.155/N75hose.jpg">
Forum: S4 / RS4 (B5 Platform) Discussion
05-13-2008, 08:41 AM
Replies: 15
Views: 658
Posted By VonK :: Retired

I meant what part or function of the N75 failed.

I meant what part or function of the N75 failed.
Forum: S4 / RS4 (B5 Platform) Discussion
05-13-2008, 08:38 AM
Replies: 13
Views: 519
Posted By VonK :: Retired

The N75 IS adjustable.

The N75 IS adjustable.
Forum: S4 / RS4 (B5 Platform) Discussion
05-13-2008, 08:34 AM
Replies: 13
Views: 519
Posted By VonK :: Retired

Make sure you have the passenger side turbo oil feed line heat shield wrapped.

<ul><li><a href="https://forums.audiworld.com/s4/msgs/1378091.phtml">Why it should be done.</a></li></ul>
Forum: S4 / RS4 (B5 Platform) Discussion
05-13-2008, 08:19 AM
Replies: 15
Views: 658
Posted By VonK :: Retired

What goes wrong with the failed N75s?

What goes wrong with the failed N75s?
Forum: S4 / RS4 (B5 Platform) Discussion
05-13-2008, 08:12 AM
Replies: 27
Views: 701
Posted By VonK :: Retired

NP :)

NP :)
Forum: S4 / RS4 (B5 Platform) Discussion
05-09-2008, 11:48 AM
Replies: 27
Views: 701
Posted By VonK :: Retired

Then how do you know what buckled it? :)

It does look pretty skinny.
Forum: S4 / RS4 (B5 Platform) Discussion
05-09-2008, 11:44 AM
Replies: 27
Views: 701
Posted By VonK :: Retired

Thanks for the link. I used to run special rods ...

... that had the cap and rod mating interface indexed with cross cuts before machining the journal. This allowed enlarged bolt holes to avoid internal contact with the bolts, thus minimizing bolt...
Forum: S4 / RS4 (B5 Platform) Discussion
05-09-2008, 08:49 AM
Replies: 27
Views: 701
Posted By VonK :: Retired

What's that out of?

What's that out of?
Forum: S4 / RS4 (B5 Platform) Discussion
05-09-2008, 06:09 AM
Replies: 27
Views: 701
Posted By VonK :: Retired

Thanks Alex. I guess > 250% stock boost, nitrous, overev and valve contact might do it. :)

BTW, do stock 2.7 and 2.8 engines use the same rods?
Forum: S4 / RS4 (B5 Platform) Discussion
05-09-2008, 03:26 AM
Replies: 27
Views: 701
Posted By VonK :: Retired

That looks like a buckled rod due to some other problem.

What I meant was that you can't apply a bending moment to the green rod by any force you apply through the red stubs. You can only apply axial tension or compression.




<img...
Forum: S4 / RS4 (B5 Platform) Discussion
05-08-2008, 08:12 PM
Replies: 27
Views: 701
Posted By VonK :: Retired

Thanks for the link. They even show coated rod...

Thanks for the link. They even show coated rod bearings.
Forum: S4 / RS4 (B5 Platform) Discussion
05-08-2008, 07:56 PM
Replies: 27
Views: 701
Posted By VonK :: Retired

The torque you're talking about ...

... is a small inertial moment due to the lateral back and forth motion of the rod. It is purely a function of engine speed and independent of combustion loads. Actually you can't bend a rod with...
Forum: S4 / RS4 (B5 Platform) Discussion
05-08-2008, 07:33 PM
Replies: 23
Views: 3,739
Posted By VonK :: Retired

If all else fails replace the Coolant Temperature...

If all else fails replace the Coolant Temperature Dual Sensor (G62).
Forum: S4 / RS4 (B5 Platform) Discussion
05-08-2008, 07:12 PM
Replies: 27
Views: 701
Posted By VonK :: Retired

That's always a difficult problem when using stock crank shafts, ...

... because widening the journals would weaken the crank. So people have chrome plated and polished the journals and used different bearing shell materials that, while not as long lived as OEM...
Forum: S4 / RS4 (B5 Platform) Discussion
05-08-2008, 03:50 PM
Replies: 27
Views: 701
Posted By VonK :: Retired

About Rods...

There seems to be a fair amount of discussion here about stronger rods to accommodate high boost (&gt;500 hp) in the 2.7T engine. Why would that be necessary?

I've always labored under the impression...
Forum: S4 / RS4 (B5 Platform) Discussion
05-08-2008, 12:38 PM
Replies: 73
Views: 10,994
Posted By VonK :: Retired

Has anybody ever seen a rod that was buckled from...

Has anybody ever seen a rod that was buckled from combustion loads alone?
Forum: S4 / RS4 (B5 Platform) Discussion
05-07-2008, 06:51 AM
Replies: 64
Views: 4,127
Posted By VonK :: Retired

Some may remember ...

<ul><li><a href="https://forums.audiworld.com/s4/msgs/2727080.phtml">In memoriam ......</a></li></ul>
Forum: S4 / RS4 (B5 Platform) Discussion
05-03-2008, 04:20 PM
Replies: 3
Views: 280
Posted By VonK :: Retired

Pads installed wrong way? Its been done before! :)

Pads installed wrong way? Its been done before! :)
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