[DeTomaso] Oil Smoke From Breathers

[John Taphorn]

Remember that there is a difference between static and dynamic compression. 
Dan's cam may be of longer duration and the valve timing overlap may bleed 
off cylinder pressure at low RPMs when the incoming mixture has less 
inertia.

JT
----- Original Message ----- 
From: "Dan Courtney" <dfcex at pacbell.net>
To: <dfcex at excaliburre.com>; <wkooiman at earthlink.net>; 
<detomaso at realbig.com>; "Pantdino" <pantdino at aol.com>
Sent: Sunday, April 24, 2011 7:02 PM
Subject: Re: [DeTomaso] Oil Smoke From Breathers


> Jim,
>
> All plugs were out, no throttle and the engine was ice cold (hadn't been 
> fired for a month - header replacement). Each of the cylinders was almost 
> exactly 150 psi.
> The previous test, a year earlier, had all eight between 185 & 200 psi, 
> with a warm engine, all lugs out, no throttle.
>
> Dan
> Dan Courtney
> 22 Years of Excellent Representation
> Excalibur Commercial Real Estate Services
> La Jolla, CA
> (858) 551-5455 P
> (858) 551-5456 F
>
>
> From: Pantdino
> Sent: Sunday, April 24, 2011 12:54 PM
> To: dfcex at excaliburre.com ; wkooiman at earthlink.net ; detomaso at realbig.com
> Subject: Re: [DeTomaso] Oil Smoke From Breathers
>
>
> I realize compression checks are inexact and the most important thing is 
> the cylinders all being the same, but 150 seems a bit low to me for 10.5:1 
> CR.
> I have little experience with these matters, but I had cause to recently 
> test 2 motors-- both done with the engine hot, all plugs removed, and the 
> throttle being held wide open.
>
> Triumph TR6, supposed CR either 7.75 or 8.5:1----  5 cylinders 135-137, 
> one 125
>
> Fiat Abarth with supposed CR 10.0:1----  2 cylinders 175, 2 cylinders195
>
> Was your test done under those conditions?
>
> Jim
>
>
>
>
>
>
>
> -----Original Message-----
> From: Dan Courtney <dfcex at pacbell.net>
> To: dfcex at excaliburre.com; wkooiman at earthlink.net; detomaso at realbig.com; 
> Pantdino <pantdino at aol.com>
> Sent: Sat, Apr 23, 2011 11:53 pm
> Subject: Re: [DeTomaso] Oil Smoke From Breathers
>
>
> About 10:5 - 1.
> Dan
>
> Dan Courtney
> 22 Years of Excellent Representation
> Excalibur Commercial Real Estate Services
> La Jolla, CA
> (858) 551-5455 P
> (858) 551-5456 F
>
>
> From: Pantdino
> Sent: Saturday, April 23, 2011 11:17 PM
> To: dfcex at excaliburre.com ; wkooiman at earthlink.net ; detomaso at realbig.com
> Subject: Re: [DeTomaso] Oil Smoke From Breathers
>
>
> Just out of curiosity, what compression ratio are you running to get 150?
>
>
>
>
>
> -----Original Message-----
> From: Dan Courtney <dfcex at pacbell.net>
> To: Will Kooiman <wkooiman at earthlink.net>; 'Dan Courtney' 
> <dfcex at excaliburre.com>;
> detomaso at realbig.com
> Sent: Sat, Apr 23, 2011 11:11 pm
> Subject: Re: [DeTomaso] Oil Smoke From Breathers
>
>
>
> Thanks Will,
> Also, I did a compression test. All 8 are at 150 psi. I already changed 
> the
> PCV, but maybe got a defective one, so I'm trying another tomorrow.
>
> Dan
>
> Dan Courtney
> 22 Years of Excellent Representation
> Excalibur Commercial Real Estate Services
> La Jolla, CA
> (858) 551-5455 P
> (858) 551-5456 F
>
> --------------------------------------------------
> From: "Will Kooiman" <wkooiman at earthlink.net>
> Sent: Saturday, April 23, 2011 9:53 PM
> To: "'Dan Courtney'" <dfcex at excaliburre.com>; <detomaso at realbig.com>
> Subject: RE: [DeTomaso] Oil Smoke From Breathers
>
>> #1 valve seal popped off
>>
>> #2 rings not seated yet
>>
>> That's 2 guesses.
>>
>> -----Original Message-----
>> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com]
>> On
>> Behalf Of Dan Courtney
>> Sent: Saturday, April 23, 2011 11:22 PM
>> To: detomaso at realbig.com
>> Subject: [DeTomaso] Oil Smoke From Breathers
>>
>> Anybody have a guess as to highly visible oil smoke coming from the
>> breathers, mainly between 3,000 & 4,000 rpms?
>> Valve guides? (Only 4,000 miles on the guides and it's been doing this
>> since
>> the most recent assembly).
>>
>> Thanks for your suggestions,
>> Dan
>>
>> Dan Courtney
>> 22 Years of Excellent Representation
>> Excalibur Commercial Real Estate Services
>> La Jolla, CA
>> (858) 551-5455 P
>> (858) 551-5456 F
>> _______________________________________________
>>
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