Originally posted by GQ626 at the "other" forum:
As suggested, many other TT owners are looking to replace the existing wire with a shielded cable and reroute it, similar to APS.
Peter,
Does APS plan to sell the components for this modification?
G
Most of us knew about this well before the announcement, but agreed to keep it privileged information out of respect for APS. I'm not sure what brought it out at this particular time, but nevertheless, its info that all TT (except APS) owners need and should address.OK, I think the cat is out of the bag on this crank angle sensor wire issue. APS has posted a detailed schematic on their website, so I feel this should be read by anyone that is running F/I on their motor. Especially those are building some very expensive forged motors.
There is some speculation, and apparently some testing by APS has confirmed this as well....that there is some kind of interference or anamoly with our crank angle sensor wire. Essentially, there is some noise in the signal that goes to the ECU, and under certain circumstances, this can generate a false or muddy crank angle input to the ECU. Obvisouly, if this happens, there is a chance that the coils may fire before the pistons are at TDC, and could contribute to detonation/preignition. Peter has also described this as "scattered ignition timing". It is something that occurs only under certain conditions, and only on certain cars. Some cars exhibit no anomolies...others do.
But APS felt it was important enough to include a new shielded crank angle sensor wire in their kit. You can see this on their website.
So...just to be safe, it would be HIGHLY ADVISIBLE for everyone with the Greddy and PE kits to immediately swap their unshielded crank angle sensor wire with a new shield wire. I would hate to see these new forged motors start blowing up due to this potential problem.
I was also thinking that some diodes on the line would also be helpful...what do the electrical experts think?
As suggested, many other TT owners are looking to replace the existing wire with a shielded cable and reroute it, similar to APS.
Peter,
Does APS plan to sell the components for this modification?
G