[DeTomaso] strength of stock valve springs and ZDDP required

[Pantdino]

I don't think it does that.
It just says you have to consider the specifics of the engine involved.

For Panteras, my Workshop Manual says it has 299 and 95 lb springs, so 400 total max.

Per the data in the post 600ppm ZDDP should protect up to 480lbs at a maximum of 3600 rpm.

So unless you have stronger valve springs or spend a significant amount of time above 3600rpm even 800ppm is probably OK and 1100-1200ppm should be fine.

Jim O






-----Original Message-----
From: Dave Londry <davel at emspace.com>
To: Pantdino <pantdino at aol.com>
Cc: detomaso <detomaso at realbig.com>
Sent: Sat, May 26, 2012 12:08 pm
Subject: Re: [DeTomaso] strength of stock valve springs and ZDDP required


Hey that's a good piece.
oo bad it reinforces the idea that if GM says it - it must be BS.
ave
On 25/05/2012 9:21 PM, Pantdino wrote:
 Anyone know what the strength of a stock Pantera valve spring is?

 here's a link to a Bob is the Oil Guy thread that was the most informative of 
he ones I have seen.  It gives some info on what ZDDP ppm you need for 
ifferent spring rates:


 http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1050251&Searchpage=1&Main=81269&Words=David_Navone&Search=true#Post1050251

 Jim Oddie
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