[DeTomaso] Ping Ping

[Jerry Knotts]

I guess over the years I have used all of the above except knock sensor 
change.  Never really had the ping but I have used water/methanol, 50 
shot of Nitrous with a Jacobs unit, also have 3 different pullies for 
the for the snout of the blower.  A 6 lb, 9 lb and an 11 lb pulley.  I 
run the 11 lb usually and the tensioner allows for the difference in 
diameter without changing the belt. I did run a 18 lb Blowzilla on my 
'94 Lightning for a while and was reminded of the fact that constant 
boost provides constant heat, that is where I used the 50 shot at lower 
rpm's.

The knock sensor sounds the easiest to check.

Jerry
On 1/7/2014 8:30 PM, JEFFREY COBB wrote:
> Hey LS,
> Sounds like your knock sensors are not doing their job, this Ford 
> system is designed not to allow pings. Hook up a scanner and drive and 
> reproduce the flaw and note rpm/ignition advance degrees at your 
> flawed load manifold pressure. Remap the ecu only after a knock sensor 
> function test is done so as to identify what is wrong because 
> something is. Then after knowing and fixing the flaw then 
> water/alcohol injection can be used for a smarter power increase. Of 
> course an intercooler is the best plan, heck a low amount of fogged 
> nitrous will also cool the intake track for a much quicker dynamic 
> cool down under light positive load. Use a Jacobs programmer and set 
> your nitrous spray curves.
> Get in touch with the Kenny Bell company as this maybe an inherent 
> flaw in this Ford application and they know the fix protocol.
> Hope this helps,
>
> Jeff
>
> Jeff Cobb- I pad
> W-225-343-7525
> C-225-907-4514
>
> Jeff Cobb Auto Works
> 1316 S. Acadian Thruway
> Baton Rouge, La.
> 70806
>
> www.LiveOakConcours.org <http://www.LiveOakConcours.org>
>
> On Jan 7, 2014, at 4:42 PM, LS <lashdeep at yahoo.com 
> <mailto:lashdeep at yahoo.com>> wrote:
>
>>
>> I don't even like golf...but need some input.
>> On long uphill (high load) sections of road, under moderate throttle 
>> openings and when the supercharger goes into positive boost, the 
>> engine starts to ping. This will happen only when in overdrive and 
>> with revs below 2000rpm.
>> Vehicle : Laforza Magnum GT, 5300 lbs
>> Engine : 5.0 HO with factory Kenne Bell supercharger, no intercooler 
>> and cast iron heads.
>> Trans: AOD 4spd
>> Fuel : 93 Octane
>> Elevation : Sea Level up to 1000'
>> Water Temp : Never exceeds 195F during the "situation"
>> To remedy the situation, I have adjusted the trans to kickdown sooner 
>> and have also retarded timing. This has helped but not eliminated the 
>> problem.
>> Any thoughts on permanent solutions?
>> Aluminum heads? Intercooler?
>> I've heard the full spectrum of ideas so I thought I'd post it here 
>> for discussion.
>> I want loads of power (who doesn't?) but I want to eliminate this 
>> problem ASAP so I can get many more decades out of this powertrain.
>> Thanks,
>> LS
>>
>>
>>
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