I can't be sure, since I'm not there to experience it, but...those plugs look fine to me. They are nice and dark from running rich, and if you made numerous pulls with detonation loud enough to hear it, they should be white, flakey and possibly missing pieces. Does anyone agree?

I am going to take a shot in the dark and say maybe you have a pre-turbo exhaust leak? It would go tick-tick-tick and if it's small you would only hear it under high load and in the upper gears since it takes longer to go through them and would be more noticeable...hope that's the problem...

 

Try a different FMU-solves a lot of these problems

 

From the looks of the plugs you might be running real rich... real rich situations can also cause you to detonate. If the setup is intercooled, try stock timing or maybe only 2 degrees retard on the engine instead of a lot... which you might have. With the high-*** octane gas you're running there's no reason you'd need to retard anything at all if it's intercooled. You're most likely (if you're realy detonating... could be preignition) experiencing this from super rich conditions. If your Walbro pump was a GSS342 intank, put that back in and get rid of your BOSCH inline. At 6 psi you souldn't need big pressures that warrant an inline pump.

 

ermmmm detonation caused by super rich conditions???
WTF~!!!! please explain this to me...

I really never heard of that before!!

 

could be a faulty FMU. Turn the key to On. See what ur fuel press is. Then get 5 psi into the system and see what it rises to.

 

^^^i agree. wouldnt a 12:1 fmu mean it builds 12lbs of fuel pressure per 1lb of boost. i would think thats way too much fuel considering your only running 6lbs of boost and it should all coordinate with the same vaccum system. along with the huge fuel pumps id say your overworking somethining to soon in your rpm range. more then like your injectors. does that make sense? an adjustable fmu is the way to go. easier to fine tune at lower ratios.

 

i need to look at these dates before i reply!! but just for the fellow searcher...somethin to think about i guess
!!

 

Wuahahah thats ok.... :-)
Your intent was good... thnx