Call up promotion, they did mine two years ago. However, make sure to let them know you want to use the OEM slave as they will have to machine the saddle as its ~.300" taller than the original.
Here's and old pic of mine...
Just an FYI on NGK spark plugs...the higher the number the colder the plug. And I don't think anyone but brisk has a plug 2 heat ranges colder than stock. Brisk part#XOR12YS-1
I would datalog to see what your timing actually is, as well as, to see if the knock sensors are pulling timing, also spark source and fuel source. Might want to check the gap on the plugs, it could be just misfiring instead of actual detonation.
Yes I did. Let me see if I can find the link he gave me.
Here it is...
http://www.ngksparkplugs.com/tech_support/spark_plugs/p4.asp?mode=nml
"When using an ethanol blend fuel with high ethanol content in high performance applications, a colder heat range may be necessary.The spark timing can...
Heat range does not effect the electrical energy transferred through the plug, however the heat range does thermal performance of the plug. Ultimately you want self cleaning of the plug but sometimes you have carbon deposits (too cold) and sometimes overheating (too hot). Too hot, in my opinion...
Can you post your datalogs?
What were you 60ft times?
I like the setup of tr6060, 3.55 and 28" tires, although I'm on bias-plys. I'm launching at 5500 on two-step at 16psi and pulling high 1.3's-low 1.4's. After I get a full cage I'll break into the 9's. I think you just need more seat time...