[DeTomaso] Overheating problem

[Mike Drew]

Wow, I think 22 max advance is super duper retarded. An iron head 351C often likes 32-36 total advance if my memory is correct, while more efficient aluminum heads can get by with 28-30. 

22 is doom. 

Or so it seems to me. Others know far more about this stuff. 

Mike



Sent from my iPhone

> On Jul 15, 2024, at 13:38, George Sekula <georgesekula at outlook.com> wrote:
> 
>    I was worried about the timing curve.  I replaced the entire ignition
>   system over last winter.  I installed the new MSD Ultra 6AL Plus and
>   pinned the weights in the crab cap distributor.  I knew I would never
>   change springs and weights and I am spoiled by how easy it is to tune
>   my kid's Hondas.  I tried to match the old distributor setup to start.
>   But I am not sure how close I am to having the correct timing curve for
>   a Cleveland with SVO heads.  I have 14 at idle, 19 at 2000 rpm, and 22
>   at 2400 rpm (these are the rpm's at highway speed), and very little
>   vacuum advance.  I am not happy about having to remove the head, but at
>   least I now understand the problem.
>     __________________________________________________________________
> 
>   From: John Neal <jrnealjr at aol.com>
>   Sent: Monday, July 15, 2024 1:47 PM
>   To: georgesekula at outlook.com <georgesekula at outlook.com>;
>   mikeldrew at aol.com <mikeldrew at aol.com>
>   Cc: detomaso at server.detomasolist.com <detomaso at server.detomasolist.com>
>   Subject: Re: [DeTomaso] Overheating problem
> 
>   Retarded Timing can cause overheating and dieseling when the engine is
>   turned off.
> 
> 
> 
>   I adjusted mine so the engine is hard to turn over when hot and then
>   backed the timing off until the engine cranks freely when hot.
> 
> 
> 
>   Way less work then pulling the seats and bulkhead to connect a timing
>   light.
> 
>   In a message dated 7/15/2024 11:57:44 AM Central Standard Time,
>   georgesekula at outlook.com writes:
> 
> 
> 
>     Thank you all for your help. Dozens of attempts, three times I could
>     idle for 30 minutes without an excursion, then 10 minutes on the
>     highway and the temperature climbs.  Drained oil and found no
>     contamination.  No smoke out the tailpipe.  No little air bubble,
>   just
>     volcano like eruptions.  Did a combustion-gas-in-coolant test four
>     times with no combustion gas detected.  When I did a cylinder leak
>   down
>     test on cylinder 3, pointer was in the red and coolant was
>   overflowing
>     the pressure tank.  I have some work to do, hoping it is just the
>   head
>     gasket.
>       __________________________________________________________________
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