The saga continues! "New" engine blew up!

[Jake Raby]

I believe that I may know what has happened here and I am not willing to discuss it online. We have recently uncovered some revealing information that could be applicable to your situation.

I definitely want to see this engine.

The LWFW is more than likely not a problem, that takes time to occur with these engines generally. Like I said, I believe I know what happened.

[insite]

Originally Posted by The Radium King

sounds like it stalled when the clutch was depressed - ecu not able to react to the rapid rpm change associated with the lighter flywheel. so, what happens when you take a m96 from high rpm to off in a corner?

nothing, really. done it thousands of times. react how, out of curiosity?

[The Radium King]

i've read (ie, no ral expereince) that sometimes vehicles will stall with a lwfw, as the ecu anticipates a certain lag in rpm drop when the clutch is depressed. they way i read the initial description, it read like the stall happened when the clutch was depressed, not re-engaged ...

[insite]

Originally Posted by The Radium King

i've read (ie, no ral expereince) that sometimes vehicles will stall with a lwfw, as the ecu anticipates a certain lag in rpm drop when the clutch is depressed. they way i read the initial description, it read like the stall happened when the clutch was depressed, not re-engaged ...

ah; i hear what you're saying now. the revs do drop very fast. in the older cars, if the idle valve is the least bit sticky, it won't always react in time to keep the engine from stalling. i think the e-gas cars don't have this problem so much as the early ones. byron's was e-gas.

i was working under the assumption that the engine died after the downshift was completed. byron?

[Mike_Yi]

WOW! That REALLY sucks!

I'd love to hear the cause of the problem if you ever figure it out. I figured you had covered all the bases with what you've done to your engine. Now that my car is running again, I was thinking about putting an Accusump in it and tracking it again. After hearing this, I'm thinking maybe I'll sell it and buy a used Camaro or Vette.

[seningen]

Well I hope Jake is willing to spread the word.

I'm in the midst of building my Boxster S track car and would
hate to put all that time and effort into it to turn it into a
box of marbles my first time out.

thx,

Mike

[Burg Boxster]

Originally Posted by seningen

Well I hope Jake is willing to spread the word.

seningen,
I think you already have your answer...

Originally Posted by Jake Raby

...I may know what has happened here and I am not willing to discuss it online.

I'm sure this, as you called it, 'box of marbles' is a particularly sensitive subject since it has the "engine saving IMS retrofit/upgrade" . . .

[Byron in Atlanta]

Originally Posted by insite

ah; i hear what you're saying now. the revs do drop very fast. in the older cars, if the idle valve is the least bit sticky, it won't always react in time to keep the engine from stalling. i think the e-gas cars don't have this problem so much as the early ones. byron's was e-gas.

i was working under the assumption that the engine died after the downshift was completed. byron?

No, it died while the clutch was depressed. I actually coasted the car for a second. Considered pulling to the side, but I didn't want to stop the whole event just cause the car died. So I popped the clutch and engine picked right up. I suspect that the engine died because what was happening had already happened. I never ran a full lap under speed, so I really doubt it was an oiling problem and I didn't over rev. As I said, I was trying to take it easy and bring it up slowly. I had already had it up to speed on the interstate, so I suspect it was a pre-existing issue with the used engine? Obviously, there is no way of knowing if there are internal issues in a used engine without a complete rebuild and Porsche has done a great job of limiting the availability of those.

[insite]

Guide or tensioner failure