Rotor replacement

[Mike Robinson]

I have never played around with the timing adjustment as you guys are
talking about, but I have had to take the timing belt off twice before.  The
way I have always done it is the way the Bentley says.  I line up the 0 mark
on the flywheel then I turn the cam sprocket (w/ t-belt off) until the dot
on the backside of the sprocket lines up with the edge of the valve cover
gasket (that's a big eyeball guess btw).  Once those two are aligned, I put
the t-belt on and it always has started fine.  With 250,000 miles on the car
I figure something would have gone wrong by now if I hadn't done it right.
The engine still runs as strong as when I got the car with about 100k.

If you are looking to improve the top end, you could open that exhaust up a
little.  I have a Scorpion (2.5") on my 90q and definitely noticed more
power upstairs.  On the contrary I noticed a drop off on the low end.  The
upper end power makes up for a lot on the freeway though, I can keep up with
a lot of cars that have a lot more HP than me.

Just my thoughts.

Mike Robinson
1988 Audi 90q 249,500ish miles


On 2/25/03 11:27 AM, "duandcc_forums at cox.net" <duandcc_forums at cox.net>
wrote:

> Up to 20* BTDC? Really? Without detonation? Wow! OK, if I run it at 20* BTDC,
> wouldn't that totally kill my top end power? I mean, I know it will help low
> end grunt, but at the cost of the top end? The NG is pretty gutless above 5250
> RPM already...
>
> Dave
> 1987 CGT Special Build
> SE Virginia
>
>
>> From: Tony Lum <tlum at flash.net>
>> Date: 2003/02/25 Tue PM 01:00:17 EST
>> To: <duandcc_forums at cox.net>
>> Subject: Re: Rotor replacement
>>
>> At 12:20 PM 2/25/03 -0500, you wrote:
>>> Well, it's time for the plug wires, rotor & cap on my NG to be replaced.
>>> After doing so, I'll have the timing reset (I have reason to belive it's
>>> off). I wanted to double check the proceedure. Put the motor on top dead
>>> center and make sure the rotor lines up with #1 spark plug wire on the
>>> cap, then you can set it with a light from there. Correct? A properly
>>> running but otherwise unmodified NG with CIS-e III should be set to 12* if
>>> you always run 93+ octane gas, right? Or can you usually go higher?
>>>
>>> TIA,
>>>
>>> Dave
>>> 1987 CGT Special Build
>>> SE Virginia
>>
>> Its normally 15 deg BTDC and its been reported you can go up to 20 deg
>> BTDC.  BTW, you're supposed to put the spare fuse in the top of the fuel
>> pump relay to stabilize the timing system for adjustment.  An advancing
>> type timing light makes this adjustment pretty routine.
>>
>> HTH,
>>
>>
>> - Tony
>> lots of I-5 Audis
>>
>>
>>