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small-list Digest Tue, 14 Mar 2000 Volume: 2000 Issue: 031

In This Issue:
Re: 2.8/2.9 Numbers
Re: 2.8/2.9 Numbers
Re: 2.8/2.9 Numbers
Constipated Catalytic Converters

----------------------------------------------------------------------

Date: Tue, 14 Mar 2000 19:16:15 -0800
From: Adam McLaughlin jps.net>
Subject: Re: 2.8/2.9 Numbers

Hmm... Thanks Tim.

I was just looking to get some idea of how things should go, or would be going.

I have a 1989 Ranger with 412,000 miles on it. It has cost us a water pump, a transmission and
a clutch.

That's it.

2.9, STX, 4x4, manual shift, All options.

It too has never seen 3100 RPM, just like the bronco 2.

Adam

Tim Turner wrote:

> Anyone know the factory redline, torque/hp figures w/ RPM for the 2.8 & 2.9?
>
> Adam McLaughlin jps.net> wrote:
> > What are considered mid to high engine speeds? I have never, ever run my
> engine
> > > beyond 3000 RPM. Is this a mid to higher speed?
>
> Others may disagree but I'd call it solidly in the mid. But then when I'm not
> in the truck I like the sound of engines that rev to high limits... (totally
> OT, but a rotary engine at 8000 with an unrestricted intake is music to my
> ears...) :-) In my 2.8 B-II I might shift at 3000 if I'm in no particular

> hurry and up to 5000 If I'm rushed. (6000 If I'm POed!) Not much reason to
> go past 4800-5200 though as the HP & torque have started falling way off by
> then.
>
> >
> > I am told that I am sacrificing power here,
>
> A lot depends on the design of the engine though.. just as a generalization
> you can have lots of low end torque at the expense of high RPM HP or lots of
> HP up high at the sacrifice of low end torque. (One of the reasons for 'high
> stall' torque converters; let the RPM come up enough to make some decent
> torque at launch)
>
> On my B-II the emphasis seems to be down low (as it should be for a 4x4) and
> it's done making good usuable power at about the same RPM as Kim's 1.5L Capri
> starts pushing you into the seat. Of course the redline on the Capri is some
> 2000-3000 RPM higher but the emphasis there is quickness rather than 'grunt'.
> Shifting the B-II at 3000 probably wouldn't hurt the 0-60 time greatly but I
> hate to think what it would do to the Capri's time Vs. shifting at 7000+!
> (from 10 seconds to 17?) Made the mistake once of pulling into 60 MPH traffic
> in 2nd and it seemed an eternity before it came up to speed. ;-)
>
> > but I would rather have an engine
> > > last me forvever than to light then up whenever I wanted.
>
> Nothing lasts forever! ;-) It's just me but I prefer to push it to the limits
> (and beyond!) Of course this may have something to do with why I'm in the
> occupation I'm in... bent my fist valve at 17 (1.8 Isuzu.. already 1000 RPM
> over redline and go to shift and throttle stuck.. probably in excess of 9000
> RPM when it bent); also my first valve job. later on (after the Road
> Runner) had a 71 Capri 2L; back then for whatever reason Ford wasn't marking
> tachs with a redline so I used it all (8000); only bad effect I saw on that
> one was timing belt life measured in months.
>
> Hmmm.. gonna run for now; big gasoline spill downtown at the HESS plant with
> evacuations, drawbridge raised etc.. wonder if it'll make Nat'l news.. (Oh
> joy.. spilt gas means even higher prices!) ;-)
>
> Tim T.
> Wilmington NC
>
> ____________________________________________________________________
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