Knocking Problem in 1990 Corvette L-98

Terry thartman at gte.net
Tue Oct 20 02:09:33 GMT 1998


The Thibodeaus wrote:
> 
> I have a 90 Vette with a ported plenum and Performance Resources chip with a
> few other minor modifications.  I am having a problem with pinging and have
> been monitoring the engine with an Auto X-Ray system. 

What grade fuel are you using?  Most of these aftermarket Proms specify
Premium fuel only cause they get a little aggressive with the spark table.

Also -  what is your base(static) timing set to?  I believe that 6 is 
stock for most TPIs....

thanks,

T.



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