Originally Posted by
Officespace
I spoke to Ed on Wed before the race and he said the OD plugs would be fine. I tried a colder 99T plug too, but it was no help either. I won't use OS plugs anymore since a bad batch of them made me have to resleeve a vspec twice a few years ago because they dropped their filaments into cylinder witgin 10 minutes after installing them. Also, Ed recommendss the 086 pipe for this engine, so it has to be a tuning issue. Thx for the input though.
Sorry to hear about the issues you had at PNB. I wish you would of called the shop or emailed me during the race. I'm sure we would of figured it out.
The issue you explained sounds exactly like the OD97T plug issue that I mentioned on the phone on Wednesday. Please see the attached pics and compare to your glow plug. Basically the top of the plug bottoms out on the head button and not at the seat area at the base of the glow plug stem. Blow-By around the plug reduces the engine compression at even more at peak pressure making it very hard to tune the top-end.
FYI I have spoke to Steve O'Donnell about this issue and it has been addressed. But it is still possible to get old stock which may have this issue.