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I have a 1600cc powerplant with dual kadrons a little bit of a lumpy cam and a four tipped monza. When i turn off the car there is about a five second delay then BOOM little kids go running and screaming people run for cover, I scare people. Please help me.

In my younger days, you drove along, switched the ignition off for a second and had this "boom." Could never figure out what caused it. High compression of oxygen and fuel?



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Kobus

Proud owner of a "SUPER" Standard Beetle

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Y3K:
In my younger days, you drove along, switched the ignition off for a second and had this "boom." Could never figure out what caused it. High compression of oxygen and fuel?<HR></BLOCKQUOTE>


When you turned off the ignition, you were still feeding fuel/air mixture through the engine, filling up the exhuast system. When you switch back on, the next charge of super hot exhaust lights up the unburned mix in the muffler - boom!

Rob


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Rob
Rob and Dave's aircooled VW pages
Repair and Maintenance for the home mechanic
http://www.geocities.com/aussiebug1970/index.html

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by aussiebug:
<B>
When you turned off the ignition, you were still feeding fuel/air mixture through the engine, filling up the exhuast system. When you switch back on, the next charge of super hot exhaust lights up the unburned mix in the muffler - boom!
Rob
</B><HR></BLOCKQUOTE>

Txs Rob, now many years later I have the answer.

But what could cause the boom in this instance? All I can think of: some red hot carbon somewhere in the exhaust?



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Kobus

Proud owner of a "SUPER" Standard Beetle

Sounds fun to me!