<VV> ignition knocking on 66 Corsa Turbo

[Ulli Dittmar]

Hello Bob,

thanks for your mail - timing, while increasing rpm, goes towards 40 deg BTDC.
24 deg are only at about 925 rpm - everything higher than that will change timing towards 40-50 deg.
I will have to check if there is the right distributor installed. 
Since there is no parts supply here in Germany do you know where to get a good used turbo dis and a new/used pressure retard unit?

Regards
Ulli

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61 Monza 900 Sedan
63 Monza 900 Convertible
65 Monza 110 Coupe
66 Corsa Convertible
84 Porsche 911 Targa
86 Porsche 356 Speedster Kit Car
91 Porsche 964, C4
62 VW Split Window Bus
65 VW Split Window Bus

Am 25.03.2012 um 20:08 schrieb BobHelt at aol.com:

> Hello Ulli,
> Here are a few suggestions. First, either use the tachometer or know what the engine sounds like at 3000 rpm. Connect a timing light to the #1 plug and rev the engine to 3000 rpm (in neutral, hand brake set) and see what the timing is. It should still be 24 deg BTDC. Then see what it is at 4000 rpm. Still should be 24 deg. Then see if you activate the centrifugal advance at speeds higher than 4000 (18 deg max at 4900 rpm). Use a dial-back timing light if necessary.
> Let us know the results.
>  
> Also try reinstalling the points and see if that makes a difference.
> You may not have a real turbo distributor.
>  
> Regards,
> Bob Helt
>  
> In a message dated 3/25/2012 9:21:31 A.M. US Mountain Standard Time, info at california-camping.de writes:
> Hello all,
> 
> I do not find an answer to my knocking problems.
> I have changed spark plugs, checked ignition about 20 times, I do use high octane fuel (105) and an ignitor II with matching coil. As soon I do get close to 3000 rpm and close to boost the engine starts knocking - very loud! It sound dangerous and I am afraid that it will kill the engine. 
> If anybody has any good tech advice for me please let me know - spring starts here in Bavaria and she will get out of the storage to catch some attention ;-). 
> 
> Regards
> Ulli