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Re: New at this, trying to understand horse power

Depends on what you want from your engine really.
The only figures I can find for the infinity engine is VQ35 DOHC 24-valve
3.5L V-6 - 260 hp at 6,000 rpm and 260 lbs-ft of torque at 4,800 rpm. The
Jeep 4.0 puts out 190hp and 220 lb/ft at 4000rpm, but 85% of that torque is
available at 1500 rpm. I'd be interested to see the infinity torque number
at 1500.

Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ
"Cherokee-Ltd" <nospam@home.com> wrote in message
news:T4mdnWRS1OLwtEXcRVn-gA@rogers.com...
>
> "Brian Foster" <brianfoster@houston.rr.com> wrote in message
> news:V5VBd.43168$yv2.40568@fe2.texas.rr.com...
> >I have a 4.0 liter 6 cylinder in my GC. The Infinity FX35 has 3.5 liter 6
> >cylinder that delivers 280 hp and about the same mileage as my jeep.
> >
> > How is the Infinity getting so much more HP and the same gas mileage
with
> > smaller displacement?
> >
> > We're talking 40% more HP.
> >
> > Is it better Technology or Engineering or both?

Re: New at this, trying to understand horse power

OT: I second that depends on what you want ... I like the fact that my old
4.0 idles along at about 100km/hr at about 1800 rpm very comfortably pulling
my 3000 lb boat ... and doing it burning regular gas :-)

"Dave Milne" <jeep@_nospam_milne.info> wrote in message
news:OxWBd.1428$GG1.1316@text.news.blueyonder.co.u k...
> Depends on what you want from your engine really.
> The only figures I can find for the infinity engine is VQ35 DOHC 24-valve
> 3.5L V-6 - 260 hp at 6,000 rpm and 260 lbs-ft of torque at 4,800 rpm. The
> Jeep 4.0 puts out 190hp and 220 lb/ft at 4000rpm, but 85% of that torque
is
> available at 1500 rpm. I'd be interested to see the infinity torque number
> at 1500.
>
> Dave Milne, Scotland
> '91 Grand Wagoneer, '99 TJ
> "Cherokee-Ltd" <nospam@home.com> wrote in message
> news:T4mdnWRS1OLwtEXcRVn-gA@rogers.com...
> >
> > "Brian Foster" <brianfoster@houston.rr.com> wrote in message
> > news:V5VBd.43168$yv2.40568@fe2.texas.rr.com...
> > >I have a 4.0 liter 6 cylinder in my GC. The Infinity FX35 has 3.5 liter
6
> > >cylinder that delivers 280 hp and about the same mileage as my jeep.
> > >
> > > How is the Infinity getting so much more HP and the same gas mileage
> with
> > > smaller displacement?
> > >
> > > We're talking 40% more HP.
> > >
> > > Is it better Technology or Engineering or both?
>
>

Re: New at this, trying to understand horse power

Hi Brian,
Put a rev kit in it: http://www.crower.com/ Then blow it:
http://members.cox.net/wilsond/zj.html Of course it'll rock crawl about
as good as your POS Japanese rice burner.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Brian Foster wrote:
>
> I have a 4.0 liter 6 cylinder in my GC. The Infinity FX35 has 3.5 liter 6
> cylinder that delivers 280 hp and about the same mileage as my jeep.
>
> How is the Infinity getting so much more HP and the same gas mileage with
> smaller displacement?
>
> We're talking 40% more HP.
>
> Is it better Technology or Engineering or both?
>
> Or is Infinity less than truthful about thier HP rating?
>
> Thanks

Re: New at this, trying to understand horse power

There are oodles of factors involved that determine horsepower. Without
going into depth, here are a few things to consider:

A Honda Accord has 220some HP. This just means it has a lot of take-off
power and can probably pull a fair-sized load. However, this car is designed
for higher RPM and smooth operation. For the sake of explanation, add a 6"
lift and put some 33" tires on the Accord and try and go through a mud hole.
The car has little low-end torque and a completely wrong set of gears. So,
given that the GC (about 190HP?) and Accord have comparable HP ratings, they
are designed to do completely different things.

Next up, consider gas mileage. I'm using the Accord VS GC example again
because it is more black VS white. The car is aerodynamic whereas your GC is
like driving a barn through a headwind. The car is designed for high-RPM
shifting, quick power transfer to the wheels for a fast take-off, and a
smooth, light ride. The GC is designed to pull my house off the foundation,
tear the pavement to shreds upon take-off, and is unsmooth (good word, eh?)
enough to burp a child. Similar HP but completely different purpose. Also on
the topic of gas mileage, consider the engine design. The GC engine is based
on an old design which is less concerned with conservation of fuel and more
concerned with "gimme lotsa power right-bloody-now and turn it into low-end
torque!!" The Accord engine is based on "must be able to post 35mpg on the
sticker to sell the car quickly" and only delivers the extra fuel when you
stomp on the gas. Not to mention, (awaits argument from Bill), those Jap
engines are extremely efficient when it comes to injection.

Third thing, consider my poor 4cyl rust-bucket, driven-to-hell-and-back '85
CJ7. I doubt that thing has any more than about 60HP now-a-days but when my
buddy's '91 YJ was up to the fenders in mud, I had absolutely no problem
pulling him out. For comparison-sake, I'd challenge any Infinity driver out
there to a 30 foot long X 1 foot deep mud bog and despite having 200HP, 2
extra cylinders, and an extra litre of displacement, I would still put my $
on my old CJ. Why? Cuz my little baby is designed to turn that 60HP into
"plow-power" and the Infinity is designed to carry Mrs.Anderson and her 4
kids to the grocery store.

As for technical info ...best bet is to just look it up on google. A lot of
high performance sites will have lengthy technical data, comparisons, and
diagrams. As a quick answer to your question though, I wouldn't call it
"better" engineering or technology. It *is* newer and more efficient ...but
it's just a "different" design for a different purpose. I can't say I know a
person who bought a Jeep because they wanted good MPG. I'm usually happy
with anything over 8mpg ;p One day I'm gonna do the engine/tranny/EFi swap.
One day.

"Brian Foster" <brianfoster@houston.rr.com> wrote in message
news:V5VBd.43168$yv2.40568@fe2.texas.rr.com...
> I have a 4.0 liter 6 cylinder in my GC. The Infinity FX35 has 3.5 liter 6
> cylinder that delivers 280 hp and about the same mileage as my jeep.
>
> How is the Infinity getting so much more HP and the same gas mileage with
> smaller displacement?
>
> We're talking 40% more HP.
>
> Is it better Technology or Engineering or both?
>
> Or is Infinity less than truthful about thier HP rating?
>
> Thanks
>
>