I have just locked out the advance on my Msd distributor and have replaced it back in the engine. Is there a certain rpm to get the engine at to set the timing? I was thinking of setting it at 31* ? The engine is a custom 496 with 8:5 comp ratio, AFR aluminum heads, M1 procharger, and a R-tech intercooler. Engine makes 800+hp with 8.5lbs. of boost. The builder never locked it out and after speaking with Dean Nickerson it should have been done. Thanks!

I can't answer your question directly, but I'm not a big fan of locked out timing! just my personal opinion! get yourself a programmable ignition system and don't look back

Shouldn't make a difference what rpm you check it at, locked out is locked out.At 1000rpm or 5000 rpm it should be 31.

Yep, "locked" means just that. It. Never changes no matter what rpm you are running.

Thanks for the replies. Got it done. I also just found out how weak my batteries are!

Timing will change a little after the cam starts twisting up like a pretzel.

imo you can run more advance.also,i ran locked timing for years but no more.the daytona cd1 marine box is the way to go imo.

would that pretzel be salted or plain?

LOcked timing will eat up starters sometimes, ask me how I know... so hard on starters, also witht hat blower you better monitor EGT and A/F that's pushing it with certain setups at 31, I would monitor, some engines will take more then that, some will take less... all depends.

Depends on manufacturer