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Re: Surging at 11 psi fixed (UrQ)
>I'm very surprised that these plugs which are known for lasting MUCH
>longer went bad so quickly... with no physical clues... they look
>great... not worn, cracked, etc. (Recent coil, rotor, cap, and wires)
>Any suggestions? I sucessfully use Bosch (NOT platinums) in
>everything... Corvairs to Trabant to SAAB... should I use NGK here?
<<I've had exceptionally good results with the Bosch tri-electrode plugs
(WR7DTC) in my 1.8 bar engine. Is there any possibility that your
particular plugs were not the proper heat range for your car?>>
My plugs are also WR7DTC. They look fine (not burnt, etc) with the
exception of the one with a cracked insulator. (Just as a point of interest,
when I bought the car it had a set of Bosch Platinums in it... one with a
insulator... different cylinder (#5 vs #1).
Car is '85 UrQ, K24, IA Stage One, wastegate set at 14psi.
Lake Mills, WI