DeTomaso Mailing List: April 98, Message #224

At 7:55 -0600 1/4/98, Dan Jones wrote:
>Let me know what Kip says.  Most replacement seats are plain cast
>iron.  Stellite is very hard and difficult to cut a seat into.  Dad's '37
>Chrysler has stellite seats and we used up several stones doing the valve
>job.  My aluminum Buick V8 heads have seats that appear to be
>steel.  Not quite as hard as stellite but not as soft as cast iron either.
>After they took the lead out, they began induction hardening the seats
>in cast iron heads.  Anyone know what that process entails?

Kip says:

'To be honest, I don't know!' He'll ask the shop where they get their work
done next time. So there you go... He said they're definitely not Stellite,
probably steel.

>Watch the cold pressure.  I've seen several cars balloon oil filters and
>one split the case.

I never revved the engine very hard until the pressure came down. And I
used an HP1 on and off over the years when I could find one.

>That brings up a question.  The Keith Black hypereutectic flat tops only
>have one valve relief, whereas the TRW forged flat tops have two.  What
>sort of valve lift/duration is safe with the KB pistons?   Is the second
>relief in the TRW piston there for exhaust valve clearance or is it so
>they can be installed in either bank?

The pistons I have are Wisecos and only have one relief cut in them for the
intake. When I asked Kip about valve to piston clearance, he replied,
"Don't worry about it. You've got tons of room." But I'm going to check
anyway, just for grins....

>11.1:1 with 63cc heads but my Aussies are closer to 57cc.  The TRW's
>are rated at 10.63:1 with 63cc heads.

But how can you run 92-93 octane gas on the street with 11.1? Or is the
answer, you don't?

>Thanks for the info Kirby,

You're welcome.

Kirby


Kirby Schrader                  Compuserve: kschrader@compuserve.com
                                            kschrader@slb.com
'71 Pantera #1661 (engine rebuild in progress)
'90 Thunderbird 35th anniversary special
'78 Longchamp GTS #3001   The wife's...
 http://mwd.sugar-land.anadrill.slb.com:65080/