DeTomaso Mailing List: September 97, Message #328
     



From: "Craig Cline" <Craig_Cline@smtp.rc.trw.com>

Subject: Re: Pistons and Stuff

Date: 10 Sep 1997 11:02:20 U



The original pistons in my 74 P had a very samll dish too them, sorry I =

did not measure them the last time I had the heads off.  I just recently =

changed the heads for the original open chamber to a set of closed =

chamber heads, leaving the stock pistons in place.  I'm happy with the =

results, but I'm still playing with it.  Sorry I can't really give a =

back-to-back comparison on the 2 heads, it was several years between =

driving the car with the 2 heads (growing family slowed things down).



Craig Cline

Oceanside, Ca.

'74 #7352 - da Green One



P.S.  Dan, sorry about the phantom post, I pushed the wrong button too =

early...



--------------------------------------

Date: 9/7/97 12:45 PM

To: Craig Cline

From: Dan Jones



Does anyone know what the piston variations were in the 4V/CJ

351C's used in the Panteras from '71 to '74?  Were flat tops

used in all years or did later years get dished pistons in

addition to open chamber heads?  I've seen compression specs

listed that say 10.7:1 in '71, 8.6:1 in '72, and 8.0:1 in 

'73 and '74.  One source implies the drop from 8.6:1 to 

8.0:1 was through larger volume open chamber heads and another

implies dished pistons were responsible.



I'm specifically interested in my '74.  The engine only has 

17,000 miles on it and runs fine but I've got a couple of 

sets of Aussie 2V heads and a couple of manifolds (a Weiand 

X-celerator and an Edelbrock Performer) to play with.  If 

the pistons are dished, I'll probably spring for a set of K-B 

hypereutectic pistons or a set of TRW forged flat tops.



I plan on adding an MPG head services windage tray, a true

roller timing set, Harland Sharp roller rockers, custom 1 3/4" 

headers, and a 750 CFM Edelbrock AFB carb at the same time.  

Oil restrictor pushrods, a stiffer bypass spring in the oil pump, 

and a 10 quart pan are also possibilities.  I'm undecided on the 

cam specs and valve sizes.



Then there's the stroker based on the Aussie block to consider...



Later,

Dan Jones







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From: Dan Jones <djones@thunderbolt.dfrc.nasa.gov>

Subject: Pistons and Stuff

To: detomaso@wgate.com

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