need help setting up Blaufergnugen 272 cam in 86 4000Q

[Bruce Bell]

Check the archives for: Schrick 272 camshaft review - Updated (long)

Do not advance the cam and set your timing back to 6 degrees. Check for
Air leaks then re-check again. Then test the NTC temp sensor according
to the Bentley. These can fail to either 0 or a large resistance BTDT.
Make sure the car is running right with stock settings prior to
experimenting with cam or ignition timing. The Schrick 272, from which
this cam was copied, was designed to run at stock specs. These engines
don't like more than 34-36 deg total advance which is already there with
a combination of the vacuum and centrifugal advance curves. If you are
going to play with timing do it right and get your distributor
re-curved. Not worth the money IMHO but it is the correct way.  Oh Yes,
Don't forget to check you vacuum advance canister for a leaky diaphragm.
Take two aspirin and call me in the morning.

Bruce 

-----Original Message-----
From: David [mailto:duandcc_forums at cox.net] 
Sent: Wednesday, March 23, 2005 6:30 AM
To: VFChris at aol.com; quattro at audifans.com
Subject: Re: need help setting up Blaufergnugen 272 cam in 86 4000Q

IIRC, With a 272 cam, you need to advance the timing by quite a bit to
get it to idle properly and to run right at lower RPMS.

Dave
1987 CGT 2.3
SE VA

> 
> From: VFChris at aol.com
> Date: 2005/03/22 Tue PM 10:17:18 EST
> To: quattro at audifans.com
> Subject: need help setting up Blaufergnugen 272 cam in 86 4000Q
> 
> I just installed the Blaufergnugen 272 cam in my 86 4000Q.  I also
installed 
> a new timing belt (timing set per the Bentley manual), spark plugs,
fuel 
> filters, lifters, Oxygen sensor, and other tune-up-type stuff.   The
car is 
> stock, other than I removed the catalytic converter.
>  
> The car runs OK, but has two key problems.  When coming to a  stop,
the idle 
> hunts around, going from almost a stall (about 400 RPM) to over  1000,
and 
> oscillates.  Eventually it settles down, after about ten cycles  of
this.  Also, 
> it has poor acceleration below 2000 RPM, kinda like it is  starving
for fuel, 
> and stumbles.  Once the rev's climb, it kicks in quite  strongly.
Both of 
> these problems are noticeable only after the car warms  up.  I've set
the timing 
> to about 15 degrees (versus the stock recommended  6 degrees), and I
get no 
> pinging.  Also, per the instructions from  Blau', I richened the idle
mixture 
> screw by about one turn.
>  
> I really like what this cam has done to the performance during higher
RPM  
> operation, but am bugged by these two issues.  I'm hoping someone has
some 
> experience that can help me.
>  
> Thanks very much,
> 
> Chris 
>  
> _VFChris at aol.com_ (mailto:VFChris at aol.com) 
>  
>  
> _______________________________________________
> quattro mailing list
> quattro at audifans.com
> http://www.audifans.com/mailman/listinfo/quattro
>