[DeTomaso] Quenched Head Rework or Tweaks???

Sat Jan 3 04:06:01 EST 2009

I used 6139 and 6124 valves in my 4V heads. The valve locks I could get my hands on are slightly smaller in OD than the stock valve locks so they don't fit the stock spring retainers. The retainers I could get that fit the available locks (and my valve springs) don't give the correct installed valve spring height. Neither cam/valve spring manufacturer (Comp Cams) or Ferrea were able to help me. In the end I had to shim the valve springs at both ends to ge the correct spring height.

Tomas

----- Original Message ----- 
From: "Ken Green" <kenn_green at yahoo.com>
To: <doug at silicondesigns.com>; "Pantera REALBIG forum" <detomaso at realbig.com>; "Thomas Borcich" <tborcich at msn.com>
Sent: Saturday, January 03, 2009 4:44 AM
Subject: Re: [DeTomaso] Quenched Head Rework or Tweaks???

> Flatlander Racing appears to have the Manley Severe Duty 351C valves for $398 for all 16:
> 
> http://www.flatlanderracing.com/
> 
> They also have the Ferrea 6000 Series valves for $15 each, has anyone tried them? Some people seem to prefer the Ferrea valves, I don't recall why.
> 
> They are usually cheaper than Summit if they have the part.
> 
> Ken
> 
> --- On Fri, 1/2/09, Thomas Borcich <tborcich at msn.com> wrote:
> 
> From: Thomas Borcich <tborcich at msn.com>
> Subject: Re: [DeTomaso] Quenched Head Rework or Tweaks???
> To: doug at silicondesigns.com, "Pantera REALBIG forum" <detomaso at realbig.com>
> Date: Friday, January 2, 2009, 7:23 PM
> 
> Thanks for all the info back on the one piece valves...new valves it is.
> 
> Best regards, 
> 
> Tom Borcich
> 
> 
> 
> 
> 
> 
> 
>> From: doug at silicondesigns.com
>> To: tborcich at msn.com
>> Subject: RE: [DeTomaso] Quenched Head Rework or Tweaks???
>> Date: Thu, 1 Jan 2009 13:45:33 -0800
>> 
>> Thomas,
>> 
>> One good choice for valves are Manley Racemaster (Severe Duty) one-piece
>> stainless.  You can get them here for a reasonable price.
>> 
>> www.summitracing.com
>> 
>> Enter part number MAN-11782-8 (intake) & MAN-11783-8 (Exhaust)
>> 
>> Doug Braun
>> 
>> -----Original Message-----
>> From: detomaso-bounces at realbig.com
>> [mailto:detomaso-bounces at realbig.com]On Behalf Of Thomas Borcich
>> Sent: Thursday, January 01, 2009 11:43 AM
>> To: Pantera REALBIG forum
>> Subject: [DeTomaso] Quenched Head Rework or Tweaks???
>> 
>> 
>> 
>> HAPPY NEW YEAR!!!  2009 is going to be a much better year cause the Panter
>> should be back together.
>> 
>> I followed Jack's advice to go from the 72 open chambers to 71
>> quenched chamber heads...they should arrive in a week or two from a
>> fellow Pantera owner who had a complete set sitting on the shelf and
>> gave me a smoking deal (Thanks Julian!!). I'm 90% sure the valves are
>> original OEM. What kind of valve failure rate do the OEM values have
>> once their three and a half decades old? I recall they're two piece,
> and
>> have read that some opt for one piece valves....I'm ok with
>> the OEM's for now if their dependable at this age.
>> 
>> I'll end with a 10.5 to 1 CR+/-, (I will probably surface the heads to
> make
>> sure
>> they're flat),  balanced stock lower end with TRW forged flat tops.
> I'm
>> removing the dual points and sticking in one of the electronic pointless
>> modules
>> with a rev limiter to keep it around 6,000-6,500. Cam was replaced
> (previous
>> owner) with a 498 lift intake and 510 lift exhaust, duration 262 intake
>> 272 exhaust. I will make sure the cam is set at 0 degrees.
>> 
>> Should I do any porting (JUST KIDDING!!! Couldn't resist asking that).
>> Actually
>> I may just clean up and smooth the exhaust ports.
>> 
>> Are OEM springs ok to 6500 rpm if this combination will go that high?
>> 
>> I believe the heads are ready to bolt on, the seats are in pretty good
> shape
>> with a recent 3 angle grind and the stem seals are soft and pliable.  From
>> pictures they look very clean and to have very little mileage on them
> since
>> a rework.
>> 
>> In high school I had a 67 Mustang GT Fast Back with a 289...stock Ford
> valve
>> train...
>> I reved the sheeeeet out of that motor for years and never lost a valve or
>> kissed
>> a piston...definitely floated the valves a few times....point is the 351C
>> has to have as good or better stock valve train than the 289...so why
>> change for my purposes are (fun driving and a track day a few times a
> year).
>> I'd rather put time into other areas of the car to get back on the
> road.
>> 
>> Tom Borcich
>> 
>> 
>> #4382
>> 
>> 
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