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Re: Fwd: Performance Cooling Questions



Maybe the KS is getting a little slow with age, but my gf's '87 GLI 8v
(which has KS ignition, I believe), pings for a quick, short instant when
you get on the gas in a high gear at low rpm's, and then stops. I figure
that's the KS doing its thing.
	-Josiah



On Wed, 11 Aug 1999 15:32:40 -0400 "Scott F. Williams"
<sfwilliams@worldnet.att.net> writes:
>Jonas Karlsson wrote:
>
>> I don't think that the knock sensor will really hurt performance all 
>that much, mostly because it only retards timing when it knocks.  It 
>might actually help (dunno for sure) by keeping your ignition as far 
>advanced as allowed without knocking.
>
>Yep, I'm in complete agreement with your entire explanation. What I 
>want to do, though, is eliminate as much of this preignition as 
>possible before I go to the knock sensor -which I consider inevitable, 
>anyway.
>
>Here's a question, though. Is pinging eliminated by a ks? My engine 
>never actually knocks; it just sometimes sounds like a bunch of bb's 
>are rolling around in a bucket when under load... Okay, and now a 
>second issue: How come the engine is more likely to ping when at 
>partial throttle in high gear? Intuitively I'd figure that it would 
>happen under WOT -that is, when there is the *most* load and heat 
>generated. It doesn't work out that way, though. How come?
>
>> Even after you get a KS wired in, you still need to do all of the 
>other things to keep the engine from knocking (reduce cyl head temp, 
>higher octane fuel, well formed combustion chamber for optimal flame 
>propagation, etc.), otherwise you won't see much benefit.
>
>Yeah, how can I reduce my cylinder head temperature. I've already got 
>a cooler fan switch and thermostat in there. I don't want to 
>superchill the engine, though, and not let the thing warm up. In fact, 
>the engine never seems to leave what I'd describe as an "acceptable" 
>heat range.
>--
>Scott F. Williams
>NJ Scirocco nut
>SCCA ProRally driver
>Hotrod Rabbit GTi
>
>
>
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