[DeTomaso] 1972 1/2 Pantera 351C

[Thomas Tornblom]

The FMS-M-6564-C351 rockers *are* bolt on.

I use them with my hydraulic roller cam as I think the whole idea with 
guide plates seems stupid.

I have shimmed them to the proper preload, and I like that everything is 
solidly mounted. No flopping around, the rocker only moves around the shaft.

And there is no need for any modification, and no need to pull the 
heads, although that might be a good thing anyway, just to check things out.

Not sure if they are still available. I found them in the FRPP catalog, 
but they are NA from Summit:

http://www.summitracing.com/parts/FMS-M-6564-C351/

There are a few listed on Ebay now, although at least two of them are 
described as "adjustable", and show pictures of rockers with poly locks, 
which they clearly do not have. The are bolted down solidly with allen 
screws.

Thomas

2012-01-08 16:15,  Charles Engles skrev:
>
> Dear Martin,
>
>              Good news: it is a relatively cheap and easy upgrade to make.
> It would be a major improvement over the stock stamped steel non adjustable
> rocker arms.
>
>              Bad news: it is not so easy that it is a bolt on deal.  The
> heads would need to come off and be modified to accept a proper new mounting
> stud for the roller rockers.  The addition of just this modification would
> not significantly improve the performance of an otherwise bone stock engine.
> (it wouldn't hurt the engine though).
>
>
>            A good starting point for modifying your engine and funding it
> with your checking account is to figure out what you want to do:  improve
> reliability; improve horsepower; improve bling; etc.    Then remember that
> horsepower, speed and engine improvements cost money.  How much do you want?
> What is the budget? (this is a common question whose answer is often naively
> given and more often proved to be too low at the final accounting of the
> project)
>
>           Finally, please note that engine mods done is isolation, like
> simply changing the rocker arms on a stock engine will frequently give
> disappointing results.  Sometimes isolated mods can hurt engine performance,
> i.e. mounting a large high performance carb on top of a stock engine may
> well decrease the driveability of the engine.   Modifying the engine should
> be done with the understanding that the best mods are done with the
> understanding that all the engine components work together and the better
> you chose those components and other components that will compliment them
> the better the end result.
>
>          Try this link to a list of rational modifications to 351C engines by
> Dan Jones
>
>
>           http://www.mustangsandmore.com/ubb/351Ctips.html
>
>
>
>                       Warmest regards,  Chuck Engles
>
> -----Original Message-----
> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
> Behalf Of ooiam at juno.com
> Sent: Sunday, January 08, 2012 8:52 AM
> To: detomaso at realbig.com
> Subject: [DeTomaso] 1972 1/2 Pantera 351C
>
> Hi Everyone, Is it worth to upgrade the rockers to Roller Rockers.  My
> engine is all Stock now with about 17,000 miles on her.  I have purchased a
> set but haven't installed them.  Thanks for the advise.  Martin
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-- 
Real life:   Thomas Törnblom             Email:	   thomas at hax.se
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