Denonation

From: Rob Agnew (ragnew@islandnet.com)
Date: Thu Apr 08 1999 - 17:51:10 EDT


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Date: 8 Apr 1999 08:12:03 -0700
From: RCPL-VAN CNIWR <RCPL-VAN_CNIWR@van.reid-crowther.com>
Subject: DML: Rear end whine / Detonation

     =

     =

     I have the rear end whine too, at about 35-40 mph. Doesn't concern me =

     too much. My 81 Jimmy with posi did that too. What does piss me off is=
 =

     the detonation (pinging) I'm getting. I use 87 octane (as recommended)=
 =

     and below 2000 rpm at medium loads (like cruising up a hill), I can =

     hear it. I filled up with 89 and it hasn't been doing it. I'm afraid =

     if I take it in to get "fixed", which I'm guessing is retarding the =

     timimg a couple of degrees, I'll lose power. But with 89 at 56.9 cents=
 =

     per liter (2.15 per gallon) its expensive! I don't know what to do. =

     Out of curiosity, if they can make diesel pistons survive detonation, =

     which is how they operate, for hundred of thousands of miles, why =

     can't they make gas pistons do the same? =

     =

     =

     Chad Niwranski
     99 R/T CC Black/agate
     Abbotsford, BC

Chad:

I run my 97 SLT V8 on 89 octane without pinging until I pull my trailer.
Then I run 92 octane...problem solved.

Rob Agnew
ragnew@islandnet.com

Victoria, B.C.
Canada



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