Switch Pitch TH-400 (was something else)

[Greg Hermann]

>Gwyn Reedy wrote:
>>
>> Coupla questions.
>>
>> Does any aftermarket vendor provide custom stall ratios on the variable
>> pitch converters?
>>
>At one time Kenne Bell did.  Looks like rebuilt/strengthened factory
>converters, two styles.  1800/2600 rpm, and 1600/2400 rpm stall
>speeds.
>Kenne Bell, 10743 Bell Court, Rancho Cucamonga, California 91730;
>(909) 941-6646.
>
>> What mechanism is used to control the pitch switch? Could that be adapted to
>> allow control of the clutch in a locking converter?
>>
>Old stuff, used in 65-67 Buick and Olds.  Mechanical switches close
>circuit, switches to high stall at idle, and at 70%+ throttle
>opening.  Electrically, it's opposite the TCC.  Original switches and
>linkage are tough to locate, might as well use a manual switch.
>
>> Gwyn Reedy
>> Brandon, Florida
>> mailto:mgr at mgrcorp.com

What I am thinking here, at least for drag racing with a turbo motor, is to
have it on high stall until boost reaches a pre-set level, then switch it
to low stall once the turbo is well spooled up and the boost is high (for
better efficiency). No lock up clutch to fry that way---

Regards, Greg
>>
>> > -----Original Message-----
>> > From: owner-diy_efi at efi332.eng.ohio-state.edu
>> > [mailto:owner-diy_efi at efi332.eng.ohio-state.edu]On Behalf Of Greg
>> > Hermann
>> > Sent: Sunday, January 24, 1999 10:50 PM
>> > To: diy_efi at efi332.eng.ohio-state.edu
>> > Subject: Re: DFI, Batch Fire, and other myths
>> >
>> >
>> >
>> > >
>> > >Was just thinking yesterday that the switch pitch converter should be
>> > >connected to tcc control , and detent solenoid should remain manual
>> > >control.  BTW, 350 Buick HEI works, but must use drive gear from 455
>> > >points dizzy.
>> >
>> > Ahh--dangerous thoughts, and hardware that gets forgotten--Anybody know of
>> > any experience racing with switch pitch TH-400's????  Or whether such an
>> > idea ever got tried with turbo motors??? :-) (Like switching the pitch to
>> > let it rev up into the boost QUICKLY???)
>> >
>> > Regards, Greg
>> > >
>> > >Shannen
>> >
>> >