<VV> Weird clattering

[J R Read_HML]

Do you have a harmonic balancer in good condition on this engine?

Attachments (if any) are scanned with anti-virus software.

Later, JR

----- Original Message ----- 
From: "Daniel Monasterio" <dmonasterio at megared.net.mx>
To: <virtualvairs at corvair.org>
Sent: Tuesday, August 30, 2005 12:45 PM
Subject: <VV> Weird clattering


Guys,
     I have tryed to fix this problem in several ways without success so, I 
hope somebody could point me on the right direction.
The car is a 67 with a 140 (0.040" overbore), 3872304 cam, 4 speed tranny, 
3.27 diff. and 195-70-14 tires.
     Simptoms: While on the road, every time I need to accelerate or 
maintain speed, on uphill, with the engine running between 2,500-3,000 rpm. 
it gets a noise like a high frecuency clattering (or pinging ?). Timing is 
usually at 18º BTDC and works nicely between 1,000-2,000 and 3,500-4,000 
rpm., even on hard throtling. On my last trip to sea level, I tried 
retarding time down to 6º but, it minimized the trouble slightly, only. I 
have had this problem with 110 heads and 140 heads (0.032" squish quench), 
with Pertronix II or points while using premium gas (92) all time. Tried 
with different distributors which worked fine on the Rampy's engine. Tried 
with and without vacuum advance, no succes. Tried with different springs in 
the distributor, no success. Distributor is a 0330 with right parts.
     On flat roads there is no major problem if I accelerate gently between 
the 2,500-3,000 rpm area.

     What do you think about ? Maybe the camshaft ?

     Thanks in advance for any arrow in the right direction.

     Daniel



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