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your 96 is probably the same as our 88 octane... move up the octane rating or tear your engine apart and shim the barrels to lower the compression of the engine. > > From: "Daniel Baum" <daniel@type34.info> > Date: 2005/06/09 Thu PM 03:40:04 EST > To: <type3@vwtype3.org> > Subject: Re: [T3] Engine noise > > > Sounds like detonation to me. Very serious. Back off the throttle til it > > stops when you hear it. > > I always either back off the throttle or downshift when this happens. > > > > > To Check if this is indeed your problem, buy premium the next time you > > fill > > up. If the problem goes away, it is indeed detonation. > > I had wondered whether I needed a higher-octane petrol but I would be quite > surprised if this is the case. I use 96 octane. Since they stopped selling > leaded petrol over here a couple of years ago, the 96 octane has had a > potassium additive added to it (I think this is what they call LRP in > England). Other options are 95, 98 and 99-octane unleaded. Surely it > shouldn't require 99 octane? > > > Daniel > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Brian Fye-- http://www.geocities.com/menacefye 64 Notchback, 64 Notch Speedster, 67 Squareback, 73 Squareback, 74 412 Squareback Automatic