[DeTomaso] Exhaust "Popping"

[Dan Courtney]

Donny,

I'm actually pretty limited here in San Diego. Suppose I could try JBA...
I'll call them if the gaskets and fuel pressure adjustment doesn't work, 
then at least I should be able to take one Pantera to Vegas, but no track 
action.
Dan


Dan F. Courtney


Excalibur Commercial Real Estate Services
La Jolla, CA

Phone (858) 551-5455
Fax (858) 551-5456

----- Original Message ----- 
From: "Donny Williams" <Donnylee at ccwebster.net>
To: "Dan Courtney" <dfcex at pacbell.net>; "david rehberg" 
<drehberg74 at hotmail.com>; <detomaso at realbig.com>
Cc: <wheelinj at netzero.com>
Sent: Tuesday, April 24, 2007 7:05 AM
Subject: Re: [DeTomaso] Exhaust "Popping"


> Dan-  Ever think about just taking your ride down to one of the many Pro 
> engine shops you have in California and having them go over your engine? 
> Might be some peace of mind in that....
>
> But it sounds like your onto something with the gaskets and the popping 
> problem.
>
>
> ----- Original Message ----- 
> From: "Dan Courtney" <dfcex at pacbell.net>
> To: "Donny Williams" <Donnylee at ccwebster.net>; "david rehberg" 
> <drehberg74 at hotmail.com>; <detomaso at realbig.com>
> Cc: <wheelinj at netzero.com>
> Sent: Tuesday, April 24, 2007 12:49 AM
> Subject: Re: [DeTomaso] Exhaust "Popping"
>
>
>> It looks like it could be two of these. The fellow who installed the 
>> engine used the wrong exhaust gaskets, plus they were burned out 
>> (probably due to loose header bolts) and the fuel pressure regulator was 
>> set to 3.5 psi, which I understand to be inadequate for a Holley 750 dual 
>> pumper.
>> I'm having trouble finding correct header gaskets so I won't be able to 
>> try it again till tomorrow. The exhaust ports are regtangular while the 
>> header tubes are round. The Mr. Gasket set has openings too large for the 
>> header (the header tube diameter is smaller, meaning the exhaust port 
>> opening in the gasket extends over the edge of the header tube allowing 
>> exhaust to escape from the head). The stock ones appear to be too 
>> restrictive.
>> This engine is supposed to have 4 bbl heads but I'm checking the casting 
>> number in the morning to make sure they are not 2 bbl heads. It's an 
>> Aussie block so who knows.
>>
>> Dan F. Courtney
>>
>>
>> Excalibur Commercial Real Estate Services
>> La Jolla, CA
>>
>> Phone (858) 551-5455
>> Fax (858) 551-5456
>>
>> ----- Original Message ----- 
>> From: "Donny Williams" <Donnylee at ccwebster.net>
>> To: "david rehberg" <drehberg74 at hotmail.com>; <dfcex at pacbell.net>; 
>> <detomaso at realbig.com>
>> Cc: <wheelinj at netzero.com>
>> Sent: Monday, April 23, 2007 7:28 AM
>> Subject: Re: [DeTomaso] Exhaust "Popping"
>>
>>
>>>I can think one of three things as been pointed out.  I would look for 
>>>the following in this order
>>>
>>> 1. Exhaust Flange leak
>>> 2. Vacuum Leak
>>> 3. Very lean Idle circuit
>>>
>>>
>>>
>>>
>>>
>>> ----- Original Message ----- 
>>> From: "david rehberg" <drehberg74 at hotmail.com>
>>> To: <dfcex at pacbell.net>; <detomaso at realbig.com>
>>> Cc: <wheelinj at netzero.com>
>>> Sent: Monday, April 23, 2007 7:15 AM
>>> Subject: Re: [DeTomaso] Exhaust "Popping"
>>>
>>>
>>>> >Hi Dan;Vacum leak or valves not adjusted properly?
>>>>
>>>>
>>>>>From: "Dan Courtney" <dfcex at pacbell.net>
>>>>>To: <detomaso at realbig.com>
>>>>>CC: wheelinj at netzero.com
>>>>>Subject: [DeTomaso] Exhaust "Popping"
>>>>>Date: Sun, 22 Apr 2007 21:23:41 -0700
>>>>>
>>>>>"The Winged Warrior" is still getting a constant and loud "popping" out 
>>>>>of
>>>>>the exhaust each time I left off while driving. The higher the rpm the
>>>>>louder and longer it "pops".
>>>>>It's been doing this since the new (rebuilt) engine has been in.
>>>>>So far I've changed:
>>>>>Cracked distributor cap (MSD dist running off a MSD 6AL).
>>>>>Plug wires.
>>>>>Plugs.
>>>>>Tried a substitute carb.
>>>>>Retarded the timing.
>>>>>It has the same exhaust system as on the previous 351c and the same
>>>>>ignition (MSD 6AL). It never popped with the previous engine.
>>>>>
>>>>>Any suggestions?
>>>>>
>>>>>Dan
>>>>>
>>>>>
>>>>>Dan F. Courtney
>>>>>
>>>>>
>>>>>Excalibur Commercial Real Estate Services
>>>>>La Jolla, CA
>>>>>
>>>>>Phone (858) 551-5455
>>>>>Fax (858) 551-5456
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