[DeTomaso] Fwd: Re: Ping Ping
dave londry
davel at emspace.com
Thu Jan 9 22:09:44 EST 2014
Forgot to copy the list.
(and I automatically typed Cleveland - fixed here to Windsor)
I've managed to keep quiet so far, but I'd sure go intercooler first, if
you can make the plumbing fit..
You have a meeting of
- compression ratio
- boost
- advance
- slow Windsor flame-speeds
- high charge temp
- lugging rpms
That all go together to do cause this.
I like the idea of attacking charge temperature first, but an
intercooler is a much more direct way than aluminum heads.
dave
On 09/01/2014 5:33 PM, LS wrote:
> Thanks for all the replies.
>
> 1. No knock sensor on this vehicle.
> 2. This truck is a gas guzzler so race gas wouldn't be convenient
> since I have to fill up quite a bit.
>
> I am going to try a set of Aluminum heads and then have it properly
> dyno tuned to see how well it runs.
>
> I do like the intercooler idea, but I like simplicity even more.
>
> Thanks,
> LS
>
>
>
>
>
>
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> ------------------------------------------------------------------------
> *From:* Boyd Casey <boyd411 at gmail.com>
> *To:* Will Kooiman <will.kooiman at gmail.com>
> *Cc:* "detomaso at poca.com" <detomaso at poca.com>; Jerry Knotts
> <knottsj at galstar.com>
> *Sent:* Thursday, January 9, 2014 10:00 AM
> *Subject:* Re: [DeTomaso] Ping Ping
>
> The first thing (and least expensive) I would try would be higher
> octane gas. If you can't source race gas you can try to buy Av gas at
> a small local airport (i believe that av gas is also leaded so that's
> another plus or you can try an octane booster.
> Boyd
>
>
> On Tue, Jan 7, 2014 at 11:32 PM, Will Kooiman <will.kooiman at gmail.com
> <mailto:will.kooiman at gmail.com>> wrote:
>
> I agree with Jerry. If it was factory equipped with a
> supercharger, and it is pinging, something is wrong. The knock
> sensor is the easiest to check.
>
> There are many other possible problems. Before you redesign the
> engine, look for something that is broken.
>
> On Jan 7, 2014, at 11:20 PM, Jerry Knotts <knottsj at galstar.com
> <mailto:knottsj at galstar.com>> wrote:
>
>>
>> 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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>>>> /*202-737-2800*/
>>>>
>>>>
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