Heat Range 8 Plugs

[Weyro]

Ive been running a td04 at 1 bar for nearly a year now.

I recently changed the plugs to Heat range 8's, the ones that came out were only range 5.

Is 8 too cold? What problems would running a too cold plug cause? Reduced power?

Cheers

[AdamB]

8's is way too cold mate for that setup. 7's will do nicely till probably about 400bhp.

[Foggy]

As above. Heat range 8 could give a cold start issue. Im running 7s on a td05 with no issues.

[Weyro]

ok cool, car seems to be running spot on, so would i be safe waiting till i service it next?