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Posted: Tue May 16, 2006 2:38 pm
by Jim
Eliot ,
You are lucky the Damper didn't come apart ,
"walking" is generally caused by over-reving the engine hard enough to
break the bond between the inner hub and outer ring .
The 2 parts are "molded" together ,
if the timing marks are off the damper is ruined and is just waiting to get
loose and explode the next time you hit the redline .
...................Jim
Posted: Wed May 17, 2006 7:30 am
by ChevelleFan
eliotmansfield wrote:jsmcortina wrote:Make sure that your trigger wheel is attached to the centre of the damper not outside the elastomer part or it will give somewhat erratic timing.
James
Also consider that it's known for the outside to shift considerably over time. Been working with matts tvr/rover v8, his outer damper (and hence the timing marks) were out by around 70 degrees!
I remarked my damper 3 years ago. Soon, when I fit a wheel to inner(!), I will re-check and see if its shifted since then.
Anything that has moved that much is broke! I've been using the same damper for 15 years and it hasn't moved at all. If it is shifting at all, even a few degrees, it should be replaced.
-Dave
LS1 ignition
Posted: Wed May 17, 2006 10:54 am
by eliotmansfield
It's on a 5L TVR engine, These things are supposed to be the last word in rover v8's - but having looked at parts of them closer - I know that's far from the case.
The damper is probably a bog standard rover v8 part which redlines at 5.5k  - the tvr engine revs in excess of 6k.
You cant replace it without rebalancing the entire engine again, because the 5L engines were balanced externally on the damper (And the crank to an extent too).
From: Jim [mailto:
LowQCab@bellsouth.net]
Sent: 16 May 2006 23:39
To: megasquirt-ignition@msefi.com
Subject: LS1 ignition
Eliot ,
You are lucky the Damper didn't come apart ,
"walking" is generally caused by over-reving the engine hard enough to
break the bond between the inner hub and outer ring .
The 2 parts are "molded" together ,
if the timing marks are off the damper is ruined and is just waiting to get
loose and explode the next time you hit the redline .
...................Jim
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