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Hi everyone
I am in the process of running my motor on and off alot checking and rechecking everything.
Basically In the begining it was puking some nastyness from the downpipe and I expected it. This is what happens when you bring back to life a 120,000 kilometer motor.
Nothing to serious that a run with just a downpipe for a while won't clean out.
It also had to do with the fact that the first time I ran the motor the oil I used was certainly too thin and some made it through into the combustion chamber. Now running 15w 50 cause thats the best I can get around here in the states for thick oil. I am on the look for 10w 60.
Well after that useless talk here we go to the question:
I pulled the ignition coils and took the intercooler setup off. I used a top dead center whistle to listen for tdc. I have a 7a flywheel and it's spot on timing for a 7a flywheel. Basically when I used the whistle it stopped about +-20 center-meters from the 7a TDC postion. This would shorten the compression stroke and decrease power correct? This would somewhat explain things on some one else's swap.
Also would the fact that the 7a motor is a 2.3L and the S2 motors are 2.2L have anything to do with it? Is that .1L difference noticed on the postion of the flywheel because it takes longer for the 7a motor to compress?
This is what the 7a flywheel TDC spot looks like through the viewing hole in the tranny.
Does audi setup postion TDC slightly before TDC? So that the ecu can control advance and retard situations?
OR is my 7a flywheel mark wrong and motronic is changing things accordingly to work with the current setup? I have a 7a crank pulley too. So I can't check for timing via the aby pulley becuase it's not there any longer.
I am waiting for vag-com to arrive on tuesday and then I can use vagscope to look at things more closely but opinions are appreciative.
Thanks
Josh
I am in the process of running my motor on and off alot checking and rechecking everything.
Basically In the begining it was puking some nastyness from the downpipe and I expected it. This is what happens when you bring back to life a 120,000 kilometer motor.
Nothing to serious that a run with just a downpipe for a while won't clean out.
It also had to do with the fact that the first time I ran the motor the oil I used was certainly too thin and some made it through into the combustion chamber. Now running 15w 50 cause thats the best I can get around here in the states for thick oil. I am on the look for 10w 60.
Well after that useless talk here we go to the question:
I pulled the ignition coils and took the intercooler setup off. I used a top dead center whistle to listen for tdc. I have a 7a flywheel and it's spot on timing for a 7a flywheel. Basically when I used the whistle it stopped about +-20 center-meters from the 7a TDC postion. This would shorten the compression stroke and decrease power correct? This would somewhat explain things on some one else's swap.
Also would the fact that the 7a motor is a 2.3L and the S2 motors are 2.2L have anything to do with it? Is that .1L difference noticed on the postion of the flywheel because it takes longer for the 7a motor to compress?
This is what the 7a flywheel TDC spot looks like through the viewing hole in the tranny.
Does audi setup postion TDC slightly before TDC? So that the ecu can control advance and retard situations?
OR is my 7a flywheel mark wrong and motronic is changing things accordingly to work with the current setup? I have a 7a crank pulley too. So I can't check for timing via the aby pulley becuase it's not there any longer.
I am waiting for vag-com to arrive on tuesday and then I can use vagscope to look at things more closely but opinions are appreciative.
Thanks
Josh
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