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#361
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You are very lucky Wally! Glad that's the only damage done.
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1970 T1 W/MassIVe 2913cc RAT/?EFI? w/direct fire (very soon) and 915 trans ![]() 1962 SC 1776cc SP 944NA brakes, 993 wheels VKG |
#362
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Wow ! I'm glad there was no other significant damage to your engine ! That is a very puzzling break for sure.
Sandeep |
#363
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I'm glad you have past this with the less cost effectiveness.
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#364
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It is odd that 2 broke on the same cylinder.I´ve seen that happen on V8 cars that ran into the rev limiter on their burnout,it happened to my Mustang back in 1992.I broke 3 rocker arms due to valve float when I ran into the limiter (set it lower after that
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#365
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It's just too coincidental that they are both on the same hole side by side...
Detonation? Evil Detonation, specifically? ![]() |
#366
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Quote:
Mark, its not from 'worn out' reasons either as no wear is visible. Wear by definition should always be measurable/visible. Not likely either as they run on DLC treated rocker shafts... But I do also think pure metal fatique could be the most likely cause, probably combined or caused by a does of bad luck from coinciding ignition and/or fuel cut-outs all at once and overboost cut-outs during the tuning I did the days before. These are/can be rather violent. I have no other explanation as these original rockers are really considered as 'unbreakable' otherwise. |
#367
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Hi
I'm no metallurgist, could you take them to maybe a local aeronautical engineer and ask their opinion. Steve
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STI powered 1303 in the works. |
#368
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I've done a bit of failure analysis in the past, doubtful I could tell from photos but if you post closeups of both sides (broken side) I can at least take a look.
-Dave
__________________
'71 Type 1 - Rally Project '58 Type 1 - I bought an early!?! '73 Type 1 - Proper Germanlook project '68 Type 1 - Interm German 'look' project '75 Type 1 - Family Heirloom '93 Chevy 3500 pickup - Cummins Swap |
#369
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something 4 the trophy shelf
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#370
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Quote:
![]() ![]() Yeah, the trophy shelf has another exibit for sure.. Last edited by Wally; March 19th 2010 at 16:27. |
#371
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After replacing the two rockers by another set of used rockers
![]() ![]() ![]() Also put some video up of the day on a vimeo account: http://www.vimeo.com/user3613136/videos |
#372
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what a GREAT video and some nice driving too
![]() keep it up man Chris
__________________
74 Std. GL 08 Vw rabbit 18 WR250R 07 Chevy 3500 Dually |
#373
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Well, not so sure about the driving, but you can really check out the place this way and it shows what a great wheather we had!
Vimeo has an upload limit....so I'll try to upload some other footage onto my y-tube account: www.youtube.com/user/fusca03 |
#374
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I just read through your whole build and your car is just AWESOME..
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#375
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amazing pictures again wally
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