[DeTomaso] Initial Timming

John Taphorn jtaphorn at kingwoodcable.com
Thu Apr 30 22:06:47 EDT 2009


Barry

The deck height on my stroker with quench that liked the advance  is .01"

JT
----- Original Message ----- 
From: "Barry Seib" <oldwheel at mts.net>
To: "DetomasoList" <detomaso at realbig.com>; "Daniel Jones" 
<daniel.c.jones2 at gmail.com>
Sent: Thursday, April 30, 2009 2:45 PM
Subject: [DeTomaso] Initial Timming


>
> Daniel C Jones daniel.c.jones2 at gmail.com wrote:
> Thu Apr 30 14:19:08 CDT 2009
>
>
> Our previous dyno tests of a 10:1 compression 408 cubic inch Cleveland
> with closed chamber iron heads made best power at only 32 degrees of
> total timing.  The current 351C dyno engine made it's best power at 38
> degrees.  However, some trace detonation was detected by the knock sensor
> in the mid-range.  Rather than re-curving the distributor at that time,
> we opted to pull the total timing back to 33 to 34 degrees.  We lost
> around 5 HP but gained some safety margin.  We tested both engines through
> the mufflers on 93 octane pump gas from the local Mobil station.
> In general, open chamber heads need more advance than closed chamber.
>
> YMMV,
> Dan Jones
>
>
>>>>Dan
> Do you recall what the actual quench clearance was on either or both of
> these engines?
> I suspect ignition timing may be affected by changes in that.
> Barry
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
>
> Archive Search Engine Now Available at http://www.realbig.com/detomaso/
>
> DeTomaso mailing list
> DeTomaso at list.realbig.com
> http://list.realbig.com/mailman/listinfo/detomaso 




More information about the DeTomaso mailing list