<VV> ignition knocking on 66 Corsa Turbo

[Harry Yarnell]

No wonder it pinged!!
Someone may have put a vacuum ADVANCE unit in place of the retard unit.


-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org] On Behalf Of Ulli Dittmar
Sent: Sunday, March 25, 2012 2:43 PM
To: BobHelt at aol.com
Cc: virtualvairs at corvair.org
Subject: Re: <VV> ignition knocking on 66 Corsa Turbo

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

---------------------------

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

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