[Shotimes] retard question: TQ stall?

[Mike]

One of the factors to consider here is as someone else mentioned, "brake
stall."  This is the max rpm at which the brakes will hold.  Normally on a
street stocker the brake stall is  the same as max stall.  But as you modify
your car the brakes will eventually be unable to hold the power from the
engine.  Ideally max stall is right at or just under the max torque rpm your
engine can produce.  But this is not a good thing for Mom and the grocery
getter.
Mike


----- Original Message ----- 
From: "Jason Hartberger" <jhartberger@mail.com>
To: "Mike" <srfdude@cox.net>
Cc: "`V6 SHOtimes" <SHOtimes@autox.team.net>
Sent: Sunday, July 31, 2005 8:54 PM
Subject: Re: [Shotimes] retard question: TQ stall?


> Actually I think that's about the best explanation I could've gotten. So
> basically when I floor the car and the engine revs up to about 3K rpm
> (or like, 2900!) while the speedo catches up until I get to about 35mph
> then it starts revving up some more, that's the stall point?  Basically
> the stall point is the maximum RPM differential between the output shaft
> (0rpm, obviously) and the input shaft with a car at rest, in gear, at
> WOT, right? Cos that would make sense... I suppose there isn't any way
> to raise the stall point without installing a new TQ, and that would
> just be friggin' butt-loads of money. It's a shame, though, 3Krpm is
> like the very bottom of the torque band....
>
> Jason
>
> Mike wrote:
>
> >Well the explanation was good as far as it went.  But to the question of
> >stall speed:  its a little inaccurate to refer to the stall speed as a
> >function of a given torque converter/tranny.  Its the engine speed at
which
> >the load produced by the torque converter equals the available power of
the
> >engine.  In other words if you jack up your engine power, the stall speed
> >will increase (well thats dependent on the torque curve).  High-po
engines
> >(cars) are usually designed with higher stall speed converters so as to
have
> >the engine more into the torque curve when you floor it at low speeds.
Also
> >as the howstuffworks site mentioned, there is a significant torque
> >multiplication effect at low transmission speeds vs. engine speed, so a
> >higher stall speed works here too.  Jeez, can you tell I used to teach?
> >Don't mean to be pedantic here.........
> >Mike
> >
> >
> >----- Original Message ----- 
> >From: "Ian Fisher" <dataflash@yahoo.com>
> >To: "Jason Hartberger" <jhartberger@mail.com>; "`V6 SHOtimes"
> ><SHOtimes@autox.team.net>
> >Sent: Sunday, July 31, 2005 1:02 PM
> >Subject: Re: [Shotimes] retard question: TQ stall?
> >
> >
> >
> >
> >>http://auto.howstuffworks.com/torque-converter.htm
> >>
> >>I didn't see it explained there but that was a good
> >>read!
> >>
> >>There is a FAQ at the end of that writeup that goes
> >>into stall speeds a little bit. IIRC (and I probably
> >>don't), I think it's the point in which you can
> >>overcome the engine's output by standing on the brake
> >>and not letting the car move with your foot on the
> >>gas. However, I've read that this isn't really a tq
> >>convertor stall speed, it's more of a brake stall
> >>speed. I am probably all sorts of backwards though.
> >>Google it if the above link doesn't help out.
> >>
> >>Ian
> >>
> >>--- Jason Hartberger <jhartberger@mail.com> wrote:
> >>
> >>
> >>
> >>>As the subject says, this is a retarded question,
> >>>but I've never
> >>>understood it. What the heck preisely is a TQ
> >>>'stall' point? I just read
> >>>on SHOforum (ignore that part, bruce) that the TQ
> >>>stall point on the SHO
> >>>is 2900 rpm. What does that mean? I'm so lost...
> >>>
> >>>-- 
> >>>Jason Hartberger, AT2(AW) USN
> >>>USS Theodore Roosevelt CVN-71
> >>>AIMD/IM-3 CASS
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> -- 
> Jason Hartberger, AT2(AW) USN
> USS Theodore Roosevelt CVN-71
> AIMD/IM-3 CASS
>
>
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