Joe,
Actually in many cases it doesn't have much to do with "bench racing." I
increased the rev limiter on my 96 for two very real problems - hitting the
rev limiter and excessive shifting on the road course. At the 1/4 mile
track I don't go above 7k and with the raised rev limiter I never
accidentally "get too close." On the local road course I found there were
two sections were I could hold second near redline or shift just briefly
into third. The higher rev limiter allows me to continue accelerating in
second and not bother hitting third for all but a brief moment.
See ya,
Chris Yates
96 Cobra
------------ Previous Message from Joe Stewart <[EMAIL PROTECTED]> on
11/24/1999 02:40:40 PM ----------
To: [EMAIL PROTECTED], [EMAIL PROTECTED]
cc:
Subject: Re: SCOA: Superchargers...Short
Jeff,
No offensive meant, but you bench racers crack me up!.
Joe Stewart
>>> "Jeff Winchell" <[EMAIL PROTECTED]> 11/24/99 06:17AM >>>
FWIW, Bruce Griggs' car has its rev limiter set to 8000 and I didn't get
the impression he had done much (any) work to the engine.
Also the power curve doesn't say it STOPS at 6000. It may decline
depending on your engine setup (or may continue to increase if you start
modifying things). And even in decline, it could mean that the torque
multiplier of your transmission means that the wheels still see more torque
at a very high RPM than the torque at a lower RPM in a higher gear. Plus
sometimes you'd do this if you know the time penalty of the shift wasn't
worth the short duration gain of higher torque at the wheels.
Date sent: Wed, 24 Nov 1999 13:42:06 -0500
From: "Joe Stewart" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED], [EMAIL PROTECTED]
Subject: Re: SCOA: Superchargers...Short
> Brad,
>
> >>> Bradley Pelletier <[EMAIL PROTECTED]> 11/24/99 01:17PM >>>
> I had a 97 Cobra that I spun to 8500rpm all day and every day for 60K
miles and the valves
> did not float.
>
> I am curious who burnt your chip? Because they had no idea what they were
doing if they raised the rev limiter to 8500rpms!
>
> I believe that limit is more like 9200rpm, not 7400rpm. I had to spin it
this high
> because the motor was all stock except the runners were removed.
>
> Why would you need to turn a stock n/a DOHC 8500rpms when it STOPS making
power above ~6000rpms?
>
> Joe Stewart
>
> Joe Stewart wrote:
>
> > Bill,
> >
> > I agree with 99% of what you said except the DOHC above 7500rpms will
experience valve float wi
th the stock springs. Turning any DOHC past 7400rpms without the proper
valvetrain components could
result is a quick failure.
> >
> > 96 Vobra #6741
> > Joe Stewart
> > [EMAIL PROTECTED]
> >
> > >>> Bill Kaiser/APEX Motorsports <[EMAIL PROTECTED]> 11/24/99 10:57AM
>>>
> > >Why ATI??? the answer is obvious. I have many
> > >friends with vortech, about 90% of them have their
> > >head gaskets blown.
> > --Actually, that's mostly improper tuning and/or too much boost for the
> > engine setup. The _only_ Vorteched DOHC that we've worked on that had
any
> > problems at all was one that was making 490 rwhp and was being
_heavily_
> > opentracked in Texas in high heat. And that wasn't a head gasket
failure,
> > it was a piston failure.
> > Stock 5.0s are another story, though. Because of their inferiority,
> > strength-wise, to the DOHC, they have a tendency to blow head gaskets,
> > break cranks, etc. if not properly set up. To be able to handle a lot
of
> > boost in a DOHC, you simply need to change the rods and pistons. To
handle
> > the same amount of power (500+ rwhp) in a 5.0, you'd likely need a
strong
> > (A4) block, o-ringed heads, large fuel system, and a lot of tuning.
The
> > DOHC is a perfect candidate for supercharging (or turbocharging)
because of
> > its 32 valves and the ability to spin to 7k rpm. Put in the better
rods
> > and pistons and an upgraded fuel system, though, and it'll spin to 8k+
rpm
> > with proper tuning.
> >
> > Bill Kaiser
> > APEX Motorsports, Santa Clara, CA
> > www.apexmotorsports.net
> > 4.6, 5.0, and 5.8 Liter Late Model Mustang Performance Specialists
> > (408) 562-1000, Hours: Tues-Fri 8am-5pm, Sat 8am-4pm
> > Griggs Racing Products, Official Vortech Supercharger Distributor, Ford
> > Motorsport, Edelbrock, Baer Racing, Bassani exhausts, Hawk brake pads,
and
> > more
> > _________________________________________________________
> > To unsubscribe or change your subscription options visit:
> >
> > http://www.scoa.org/maillist.htm
> >
> > Please observe the mailing list rules:
> >
> > http://www.scoa.org/listrules.htm
> >
> > If you have questions about this list, contact:
> >
> > [EMAIL PROTECTED]
> >
> > _________________________________________________________
> > To unsubscribe or change your subscription options visit:
> >
> > http://www.scoa.org/maillist.htm
> >
> > Please observe the mailing list rules:
> >
> > http://www.scoa.org/listrules.htm
> >
> > If you have questions about this list, contact:
> >
> > [EMAIL PROTECTED]
>
> _________________________________________________________
> To unsubscribe or change your subscription options visit:
>
> http://www.scoa.org/maillist.htm
>
> Please observe the mailing list rules:
>
> http://www.scoa.org/listrules.htm
>
> If you have questions about this list, contact:
>
> [EMAIL PROTECTED]
>
> _________________________________________________________
> To unsubscribe or change your subscription options visit:
>
> http://www.scoa.org/maillist.htm
>
> Please observe the mailing list rules:
>
> http://www.scoa.org/listrules.htm
>
> If you have questions about this list, contact:
>
> [EMAIL PROTECTED]
Jeff Winchell
http://PonyCar.Net
_________________________________________________________
To unsubscribe or change your subscription options visit:
http://www.scoa.org/maillist.htm
Please observe the mailing list rules:
http://www.scoa.org/listrules.htm
If you have questions about this list, contact:
[EMAIL PROTECTED]
_________________________________________________________
To unsubscribe or change your subscription options visit:
http://www.scoa.org/maillist.htm
Please observe the mailing list rules:
http://www.scoa.org/listrules.htm
If you have questions about this list, contact:
[EMAIL PROTECTED]
_________________________________________________________
To unsubscribe or change your subscription options visit:
http://www.scoa.org/maillist.htm
Please observe the mailing list rules:
http://www.scoa.org/listrules.htm
If you have questions about this list, contact:
[EMAIL PROTECTED]
