Remember trace detonation, headgaskets and bearings

Bob Valentine bob at tecmark.com
Sat Feb 17 16:33:25 GMT 2001


Nope, I'm not at 1:1 yet...     But seems no matter what I do, can't get
the 403 Olds to ping (auditable or scan tool) at anything less than WOT.
So it's just tune with as little timing as possible that produces the best
results.

-> Bob Valentine
-> bob at tecmark.com

At 07:40 PM 2/16/2001 -0500, you wrote:
>Anybody tuning a vehicle that tows, esp. pickups that pull heavy trailers,
need to
>be alert to the 60-70kpa tuning.  This can easily be a case of running
there for
>hours at a time.  And it's easy to forget to hook up the scantool, or think
>everything's ok, and head out without even monitoring that area.
>
>The guys trying to run numerically lower gears and low rpm power peak
engines see
>more of this type of stuff also.  Light cars, numerically high gears,
strong engine
>combination can be really forgiving. 
>
>Bob V., are you down to 1:1 final drive ratio yet?
>
>Shannen 
>
>Bruce Plecan wrote:
><snip>
>
>>   60-80   K/Pa is a common signal for grades, and that
>> is the last place you want to trace detonate a motor.  You never know when
>> you might wind up running in that range, and possibly for MINUTES at a
time.
>> 
>> Cheers
>> Bruce
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