i just hooked up a MBC on my Lude tonight and i am now boosting about 10psi, well, as it climbs, i got a funky kind of clicking/grinding noise, and i was just wanting to make sure i wasn't hearing detontion, timing is set at 15 degress advance, but tomorrow, i will retard it a little more to see if the noise goes away

 

Take a pop can, put a few bb's in it and shake it up...viola instant detonation .....j/k...but that is what it sounds like.....a hollow rattling sound...

 

well damn, that's about the sound i was hearing it was very slight though, i hope i didn't do any damage

 

Lower the boost until you can fix the problem. Try retarding the timing a little, run premium fuel (highest octane you can find) and you may need to add more fuel. You could be runing lean.

 

nah, i am not running lean, i know that much due to a wideband O2 , but i turn the distributer back a little to retard the timing some, and it didn't help either...... i am gonna work a little with my AEM EMS system and see if there is some **** i can adjsut or something

 

Any reasons that you're turning the distributor housing to change the timing
versus using the EMS? Now you need to re-calibrate your EMS timing to ignition timing.

 

Exactly, You don't want to retard your timing with the distributor if you can do it wth your ems. When you retard your timing using the dist. You retard everything (when the injectors fire, cam timing, and ignition) All you need to retard is the ignition timing

 

hmmm... problem is, i'm not really sure how to do that....