Ferrari Mailing List: Re: Spark plug reading?

[Peter Pless (ferrarilist]

Thanks, Larry....but I had it on a dyno to check the full throttle stuff and
ended up with 135 mains.

And this....

http://www.pless.com.au/cars/gt4/rebuild/images/308dyno.JPG     

I'm getting a portable analyser in the next few days, so I'll be able to
check what the actual mixture on cruise is.

It was 12.8:1 with the .55 idle jets...but I didn't get to fiddle with those
while I was on the dyno. 

-----Original Message-----
From: LarryT [mailto:l02turner [at] comcast.net] 
Sent: Friday, 5 October 2007 2:54 AM
To: Peter Pless
Cc: 'The FerrariList'
Subject: Re: [Ferrari] Spark plug reading?

Hi Peter,
    They *do* look good.  My only concern would be driving hard.   50 seems 
a touch lean to me but I'm no expert.

    Perhaps a 20-30 minute run with rpm's covering the range from idle to 
redline.   But be careful with temps, especially at WOT - too lean at full 
throttle can cause high temps on pistons tops.  Would hate to hear you
burned a hole in a piston.
\
    I know some say when you examine SPs you;re seeing only what happened
immediatley before the engine was stopped - but I believe it takes a little
time to get a SP to change color/texture a meaningful amount.

    Good luck -
Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis
and Weber Parts Test Results http://members.rennlist.com/oil PORSCHE
POSTERS!  youroil.net Weber Carb Info http://members.rennlist.com/webercarbs
.

----- Original Message -----
From: "Peter Pless" <ferrarilist [at] pless.com.au>
To: "Larry Turner" <l02turner [at] comcast.net>
Cc: "'The FerrariList'" <ferrari [at] ferrarilist.com>
Sent: Thursday, October 04, 2007 11:31 AM
Subject: Re: [Ferrari] Spark plug reading?


> http://www.fcavic.com.au//308/index3.htm
>
> I installed .50 idle jets in my 308 and cut the engine whilst doing a 
> light
> cruise.
>
> Haven't stuck the analyser in yet, but this looked pretty good to me.
>
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> 8:59 AM
>
>