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Hi-Rev car engines

 
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n4546v(at)mindspring.com
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PostPosted: Mon Sep 21, 2009 7:18 pm    Post subject: Hi-Rev car engines Reply with quote

do not archive

Hello All:

Today I read this on this list:

"The GEO engine runs all day at 4800 rpm that's equivalent to 70 mph on the freeway."

Could everyone or anyone please verify that this is even in the ball park.

In the last several years that car engines have been adapted to aircraft, I have often heard statements such as above where:

"These new hi-revving car engines run all day long at high rpms.

Between my own experience, and polling friends with small cars, I haven't found that to be true. I'm not challenging anyone and I have no experience with a GEO, but I have noted the following:

I had a '89 Jeep Cherokee and a "88 Jeep Comanche pickup, Identical engines and running gear, 4.0 litre straight six, turned 2100 rpm(at) 70 mph.

I have a '89 Firebird with a 2.8 lite V6, gets nearly 30 mpg on the highway. 2500 rpm(at) 70 mph.

I have a '98 Toyota 4Runner with 3.4 litre V6, 2400 rpm(at) 70 mph.

I have polled friends with compact Pontiacs, Chevys & Toyotas, and don't recall any turning at or over 3000 rpm at 70 mph.

If I have this wrong, please point out specific examples.

Most later models cars have tachs so it's not too hard to check.


Regards,

Randy, Las Vegas

[quote][b]


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tracy(at)rotaryaviation.c
Guest





PostPosted: Mon Sep 21, 2009 8:56 pm    Post subject: Hi-Rev car engines Reply with quote

Probably a little high but smaller engines do tend to be geared higher than big ones.  The Mazda MX5 (Miata) turns about 4000 - 4300 at hiway speeds.  My Kawasaki 650 twin turns close to 4800 at 70 mph.

My 13B rotary cruises at 5200 - 5600 at 170 mph (in the plane) and I have raced it at 7250 continuously (for 100 mile races).  I would not feel comfortable with that rpm if there were pistons in there stopping & starting that rapidly.  That might be just a psychological thing though.

Tracy Crook

On Mon, Sep 21, 2009 at 10:39 PM, Randy L. Thwing <n4546v(at)mindspring.com (n4546v(at)mindspring.com)> wrote:
[quote] do not archive
 
Hello All:
 
Today I read this on this list:
 
"The GEO engine runs all day at 4800 rpm that's equivalent to 70 mph on the freeway."
 
Could everyone or anyone please verify that this is even in the ball park.
 
In the last several years that car engines have been adapted to aircraft, I have often heard statements such as above where:
 
"These new hi-revving car engines run all day long at high rpms.
 
Between my own experience, and polling friends with small cars, I haven't found that to be true.  I'm not challenging anyone and I have no experience with a GEO, but I have noted the following:
 
I had a '89 Jeep Cherokee and a "88 Jeep Comanche pickup, Identical engines and running gear, 4.0 litre straight six, turned 2100 rpm(at) 70 mph.
 
I have a '89 Firebird with a 2.8 lite V6, gets nearly 30 mpg on the highway.  2500 rpm(at) 70 mph.
 
I have a '98 Toyota 4Runner with 3.4 litre V6, 2400 rpm(at) 70 mph.
 
I have polled friends with compact Pontiacs, Chevys & Toyotas, and don't recall any turning at or over 3000 rpm at 70 mph.
 
If I have this wrong, please point out specific examples.
 
Most later models cars have tachs so it's not too hard to check.
 
 
Regards,
 
Randy, Las Vegas
 
Quote:


target="_blank">http://www.matronics.com/Navigator?Engines-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution


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n801bh(at)netzero.com
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PostPosted: Tue Sep 22, 2009 5:28 am    Post subject: Hi-Rev car engines Reply with quote

It will rev that high,,,,,, if ya leave it in third gear..<GGGGGGG>
Ben Haas
N801BH
www.haaspowerair.com

--------


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mlewis(at)mlode.com
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PostPosted: Tue Sep 22, 2009 6:38 am    Post subject: Hi-Rev car engines Reply with quote

My RAV4 at 75MPH is somewhere around 3000.
BUT! . . .If I am going up hill at all, it is so under powered it drops down a gear or two and the RPM will go to 4500 at full power to climb the hill.
I am sure it would run at that 4500 RPM and full power all day long.
-Mel-


From: owner-engines-list-server(at)matronics.com [mailto:owner-engines-list-server(at)matronics.com] On Behalf Of Tracy Crook
Sent: Monday, September 21, 2009 9:40 PM
To: engines-list(at)matronics.com
Subject: Re: Hi-Rev car engines


Probably a little high but smaller engines do tend to be geared higher than big ones. The Mazda MX5 (Miata) turns about 4000 - 4300 at hiway speeds. My Kawasaki 650 twin turns close to 4800 at 70 mph.

My 13B rotary cruises at 5200 - 5600 at 170 mph (in the plane) and I have raced it at 7250 continuously (for 100 mile races). I would not feel comfortable with that rpm if there were pistons in there stopping & starting that rapidly. That might be just a psychological thing though.

Tracy Crook
On Mon, Sep 21, 2009 at 10:39 PM, Randy L. Thwing <n4546v(at)mindspring.com (n4546v(at)mindspring.com)> wrote:
do not archive



Hello All:



Today I read this on this list:



"The GEO engine runs all day at 4800 rpm that's equivalent to 70 mph on the freeway."



Could everyone or anyone please verify that this is even in the ball park.



In the last several years that car engines have been adapted to aircraft, I have often heard statements such as above where:



"These new hi-revving car engines run all day long at high rpms.



Between my own experience, and polling friends with small cars, I haven't found that to be true. I'm not challenging anyone and I have no experience with a GEO, but I have noted the following:



I had a '89 Jeep Cherokee and a "88 Jeep Comanche pickup, Identical engines and running gear, 4.0 litre straight six, turned 2100 rpm(at) 70 mph.



I have a '89 Firebird with a 2.8 lite V6, gets nearly 30 mpg on the highway. 2500 rpm(at) 70 mph.



I have a '98 Toyota 4Runner with 3.4 litre V6, 2400 rpm(at) 70 mph.



I have polled friends with compact Pontiacs, Chevys & Toyotas, and don't recall any turning at or over 3000 rpm at 70 mph.



If I have this wrong, please point out specific examples.



Most later models cars have tachs so it's not too hard to check.





Regards,



Randy, Las Vegas


Quote:
target="_blank">http://www.matronics.com/Navigator?Engines-Listtp://forums.matronics.com_blank">http://www.matronics.com/contribution



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nov32394(at)yahoo.com
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PostPosted: Tue Sep 22, 2009 8:29 am    Post subject: Hi-Rev car engines Reply with quote

A GEO engine is closer to a motorcycle engine than a 6 cylinder car engine. My Gold wing runs 5000 rpm all day on the freeway red lines at 8000 rpm similar to the GEO at 6500. These little engines have been running on planes for some time. The companies that convert them say they run best at 4800.

Dan

--- On Mon, 9/21/09, Randy L. Thwing <n4546v(at)mindspring.com> wrote:
Quote:

From: Randy L. Thwing <n4546v(at)mindspring.com>
Subject: Hi-Rev car engines
To: engines-list(at)matronics.com
Date: Monday, September 21, 2009, 9:39 PM

do not archive

Hello All:

Today I read this on this list:

"The GEO engine runs all day at 4800 rpm that's equivalent to 70 mph on the freeway."

Could everyone or anyone please verify that this is even in the ball park.

In the last several years that car engines have been adapted to aircraft, I have often heard statements such as above where:

"These new hi-revving car engines run all day long at high rpms.

Between my own experience, and polling friends with small cars, I haven't found that to be true. I'm not challenging anyone and I have no experience with a GEO, but I have noted the following:

I had a '89 Jeep Cherokee and a "88 Jeep Comanche pickup, Identical engines and running gear, 4.0 litre straight six, turned 2100 rpm(at) 70 mph.
 
I have a '89 Firebird with a 2.8 lite V6, gets nearly 30 mpg on the highway. 2500 rpm(at) 70 mph.

I have a '98 Toyota 4Runner with 3.4 litre V6, 2400 rpm(at) 70 mph.

I have polled friends with compact Pontiacs, Chevys & Toyotas, and don't recall any turning at or over 3000 rpm at 70 mph.

If I have this wrong, please point out specific examples.

Most later models cars have tachs so it's not too hard to check.


Regards,

Randy, Las Vegas

Quote:
http://www.matronics.com/========================http://forums.
= -->


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n801bh(at)netzero.com
Guest





PostPosted: Tue Sep 22, 2009 8:48 am    Post subject: Hi-Rev car engines Reply with quote

I agree with all that...

Ben Haas
N801BH
www.haaspowerair.com

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GrummanDude



Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA

PostPosted: Tue Sep 22, 2009 9:09 am    Post subject: Hi-Rev car engines Reply with quote

My Tahoe runs all day long at 75 mph at 1900 rpm and gets 20 mpg.


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rlundin46(at)yahoo.com
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PostPosted: Wed Sep 23, 2009 3:10 am    Post subject: Hi-Rev car engines Reply with quote

Let's also remember, it's not just how many rpm you're turning, it is the percent of total horse power that you're using. The average car engine at 70mph is putting out between 20-30 percent of its total. Airplanes use 70-80 percent of the total in cruse.
Rick

--- On Tue, 9/22/09, n801bh(at)netzero.com <n801bh(at)netzero.com> wrote:

[quote] From: n801bh(at)netzero.com <n801bh(at)netzero.com>
Subject: Re: Hi-Rev car engines
To: engines-list(at)matronics.com
Date: Tuesday, September 22, 2009, 9:06 AM
It will rev that high,,,,,, if ya leave
it in third gear..<GGGGGGG>


Ben Haas
N801BH
www.haaspowerair.com

--------


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henrysfork1(at)msn.com
Guest





PostPosted: Wed Sep 23, 2009 4:20 am    Post subject: Hi-Rev car engines Reply with quote

Please un-subscribe me from this list. Thanks

[quote] Date: Wed C 23 Sep 2009 04:09:49 -0700
From: rlundin46(at)yahoo.com
Subject: Re: Hi-Rev car engines
To: engines-list(at)matronics.com

--> Engines-List message posted by: Richard Lundin <rlundin46(at)yahoo.com>

Let's also remember C it's not just how many rpm you're turning C it is the percent of total horse power that you're using. The average car engine at 70mph is putting out between 20-30 percent of its total. Airplanes use 70-80 percent of the total in cruse.
Rick

--- On Tue C 9/22/09 C n801bh(at)netzero.com <n801bh(at)netzero.com> wrote:

> From: n801bh(at)netzero.com <n801bh(at)netzero.com>
> Subject: Re: Hi-Rev car engines
> To: engines-list(at)matronics.com
> Date: Tuesday C September 22 C 2009 C 9:06 AM
> It will rev that high C C C C C C if ya leave
> it in third gear..<GGGGGGG>
>
>
> Ben Haas
> N801BH
> www.haaspowerair.com
>
> --------


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groups(at)bobcroweaircraf
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PostPosted: Wed Sep 23, 2009 4:51 am    Post subject: Hi-Rev car engines Reply with quote

Dee
You have to do this yourself


On 23 Sep 2009, at 13:17, Dee Young <henrysfork1(at)msn.com (henrysfork1(at)msn.com)> wrote:

[quote] Please un-subscribe me from this list. Thanks

[quote] Date: Wed, 23 Sep 2009 04:09:49 -0700
From: [url=mailto:rlundin46(at)yahoo.com]rlundin46(at)yahoo.com (rlundin46(at)yahoo.com)[/url]
Subject: Re: Hi-Rev car engines
To: [url=mailto:engines-list(at)matronics.com]engines-list(at)matronics.com (engines-list(at)matronics.com)[/url]

--> Engines-List message posted by: Richard Lundin <rlundin46(at)yahoo.com (rlundin46(at)yahoo.com)>

Let's also remember, it's not just how many rpm you're turning, it is the percent of total horse power that you're using. The average car engine at 70mph is putting out between 20-30 percent of its total. Airplanes use 70-80 percent of the total in cruse.
Rick

--- On Tue, 9/22/09, n801bh(at)netzero.com (n801bh(at)netzero.com) <n801bh(at)netzero.com (n801bh(at)netzero.com)> wrote:

> From: n801bh(at)netzero.com (n801bh(at)netzero.com) <n801bh(at)netzero.com (n801bh(at)netzero.com)>
> Subject: Re: Hi-Rev car engines
> To: [url=mailto:engines-list(at)matronics.com]engines-list(at)matronics.com (engines-list(at)matronics.com)[/url]
> Date: Tuesday, September 22, 2009, 9:06 AM
> It will rev that high,,,,,, if ya leave
> it in third gear..<GGGGGGG>
>
>
> Ben Haas
> N801BH
> www.haaspowerair.com
>
> --------


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Kelly McMullen



Joined: 16 Apr 2008
Posts: 1135
Location: Sun Lakes AZ

PostPosted: Wed Sep 23, 2009 4:54 am    Post subject: Hi-Rev car engines Reply with quote

It is a self help program:
You get off the same way you got on...there is a link on every message at the bottom to go to change your subscription options.

On Wed, Sep 23, 2009 at 8:17 AM, Dee Young <henrysfork1(at)msn.com (henrysfork1(at)msn.com)> wrote:
Quote:
Please un-subscribe me from this list. Thanks
 
[quote]
[b]


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henrysfork1(at)msn.com
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PostPosted: Wed Sep 23, 2009 5:52 am    Post subject: Hi-Rev car engines Reply with quote

I have un-subscribed about 6 times with no results. I will try again.

Thanks

Date: Wed C 23 Sep 2009 08:54:19 -0400
Subject: Re: Hi-Rev car engines
From: apilot2(at)gmail.com
To: engines-list(at)matronics.com

It is a self help program:
You get off the same way you got on...there is a link on every message at the bottom to go to change your subscription options.

On Wed C Sep 23 C 2009 at 8:17 AM C Dee Young <henrysfork1(at)msn.com> wrote:
Quote:
Please un-subscribe me from this list. Thanks
 
Quote:
http://www.matronics.com/Navigator?Engines-List
<==================
Insert movie times and more without leaving HotmailŪ. See how.


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henrysfork1(at)msn.com
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PostPosted: Wed Sep 23, 2009 6:12 am    Post subject: Hi-Rev car engines Reply with quote

.hmmessage P {margin:0px;padding:0px;} body.hmmessage {font-size:10pt;font-family:Verdana;} Tony C been there and done that a number of time with no results. I have went to
Quote:
[b]http://www.matronics.com/Navigator?Engines-List[/b]
Then click on engines (unsubscribe is highlighted) then click execute and nada

Thanks

Dee
From: groups(at)bobcroweaircraft.com
To: engines-list(at)matronics.com
Subject: Re: Hi-Rev car engines
Date: Wed C 23 Sep 2009 13:43:39 +0100

Dee
You have to do this yourself


On 23 Sep 2009 C at 13:17 C Dee Young <henrysfork1(at)msn.com> wrote:

[quote] Please un-subscribe me from this list. Thanks

[quote] Date: Wed C 23 Sep 2009 04:09:49 -0700
From: rlundin46(at)yahoo.com
Subject: Re: Hi-Rev car engines
To: engines-list(at)matronics.com

--> Engines-List message posted by: Richard Lundin <rlundin46(at)yahoo.com>

Let's also remember C it's not just how many rpm you're turning C it is the percent of total horse power that you're using. The average car engine at 70mph is putting out between 20-30 percent of its total. Airplanes use 70-80 percent of the total in cruse.
Rick

--- On Tue C 9/22/09 C n801bh(at)netzero.com <n801bh(at)netzero.com> wrote:

> From: n801bh(at)netzero.com <n801bh(at)netzero.com>
> Subject: Re: Hi-Rev car engines
> To: engines-list(at)matronics.com
> Date: Tuesday C September 22 C 2009 C 9:06 AM
> It will rev that high C C C C C C if ya leave
> it in third gear..<GGGGGGG>
>
>
> Ben Haas
> N801BH
> www.haaspowerair.com
>
> --------


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tedd(at)vansairforce.org
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PostPosted: Wed Sep 23, 2009 6:24 am    Post subject: Hi-Rev car engines Reply with quote

On 23-Sep-09, at 4:09AM, Richard Lundin wrote:

Quote:
Let's also remember, it's not just how many rpm you're turning, it
is the percent of total horse power that you're using.

It depends what you're concerned about, Richard. If you're concerned
about internal stresses then, when you get to the higher RPMs,
inertial forces dominate and BMEP is relatively unimportant.

Also, remember that while your car engine's duty cycle typically
involves lower BMEP than and airplane engine's does, the car engine is
designed to last 6,000 to 8,000 hours, not a mere 1,500 or 2,000.
That's the other side of the equation that is often forgotten. What's
really interesting is that, since testing for 8,000 hours is pretty
impractical (you'd be on the dyno for nearly a year straight), auto
manufacturers use accelerated testing regimes that look amazingly like
an airplane engine duty cycle! So, in actual fact, production auto
engines are tested for exactly the sort of environment they would see
if installed in an airplane, even though that's not the specific
intent of the testing.

Tedd McHenry
Surrey, BC


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PostPosted: Wed Sep 23, 2009 8:52 am    Post subject: Hi-Rev car engines Reply with quote

It will run far longer at 4500 if you lug it at 3000.

Dan

--- On Tue, 9/22/09, Mel Lewis <mlewis(at)mlode.com> wrote:
Quote:

From: Mel Lewis <mlewis(at)mlode.com>
Subject: RE: Hi-Rev car engines
To: engines-list(at)matronics.com
Date: Tuesday, September 22, 2009, 9:38 AM


My RAV4 at 75MPH is somewhere around 3000.
BUT! . . .If I am going up hill at all, it is so under powered it drops down a gear or two and the RPM will go to 4500 at full power to climb the hill.
I am sure it would run at that 4500 RPM and full power all day long.
-Mel-

[quote][b]


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PostPosted: Wed Sep 23, 2009 8:53 am    Post subject: Hi-Rev car engines Reply with quote

A GEO is far from average.

Dan

--- On Wed, 9/23/09, Richard Lundin <rlundin46(at)yahoo.com> wrote:
[quote]
From: Richard Lundin <rlundin46(at)yahoo.com>
Subject: Re: Hi-Rev car engines
To: engines-list(at)matronics.com
Date: Wednesday, September 23, 2009, 6:09 AM

--> Engines-List message posted by: Richard Lundin <[url=/mc/compose?to=rlundin46(at)yahoo.com]rlundin46(at)yahoo.com[/url]>

Let's also remember, it's not just how many rpm you're turning, it is the percent of total horse power that you're using. The average car engine at 70mph is putting out between 20-30 percent of its total. Airplanes use 70-80 percent of the total in cruse.
Rick

--- On Tue, 9/22/09, n801bh(at)netzero.com (n801bh(at)netzero.com)> wrote:

Quote:
From: n801bh(at)netzero.com (n801bh(at)netzero.com)>
Subject: Re: Hi-Rev car engines
To: [url=/mc/compose?to=engines-list(at)matronics.com]engines-list(at)matronics.com[/url]
Date: Tuesday, September 22, 2009, 9:06 AM
It will rev that high,,,,,, if ya leave
it in third gear..<GGGGGGG>


Ben Haas
N801BH
www.haaspowerair.com

---------- Original Message ----------
From: "Randy L. Thwing"
<[url=/mc/compose?to=n4546v(at)mindspring.com]n4546v(at)mindspring.com[/url]>
To: <[url=/mc/compose?to=engines-list(at)matronics.com]engines-list(at)matronics.com[/url]>
Subject: Hi-Rev car engines
Date: Mon, 21 Sep 2009 19:39:42 -0700


do not
archive

Hello All:

Today I read this on this
list:

"The GEO engine runs all day at 4800 rpm
that's equivalent to 70 mph on the freeway."

Could everyone or anyone
please verify that this is even in the ball
park.

In the last several years
that car engines have been adapted to aircraft, I have often
heard statements such as above where:

"These new hi-revving
car engines run all day long at high rpms.

Between my own experience,
and polling friends with small cars, I haven't found
that to be true.  I'm not challenging anyone and I
have no experience with a GEO, but I have noted the
following:

I had a '89 Jeep
Cherokee and a "88 Jeep Comanche pickup, Identical
engines and running gear, 4.0 litre straight six, turned
2100 rpm(at) 70 mph.

I have a '89 Firebird
with a 2.8 lite V6, gets nearly 30 mpg on the highway.
2500 rpm(at) 70 mph.

I have a '98 Toyota
4Runner with 3.4 litre V6, 2400 rpm(at)
70 mph.

I have polled friends with
compact Pontiacs, Chevys & Toyotas, and don't recall
any turning at or over 3000 rpm at 70 mph.

If I have this wrong,
please point out specific examples.

Most later models cars
have tachs so it's not too hard to check.


Regards,

Randy, Las
Vegas


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GeoB



Joined: 16 Jun 2009
Posts: 207
Location: Fresno, CA

PostPosted: Wed Sep 23, 2009 9:35 am    Post subject: Hi-Rev car engines Reply with quote

Quote:
"The GEO engine runs all day at 4800 rpm that's equivalent to 70 mph on
the freeway."

That is possibly a lil exagerated, but I haven't driven one. 4800 is high for good gas mileage, but not high for a Suzuki at all. I am familiar with the engine, and the 1324cc Samurai engine (same engine, one more cylinder) which I have modified, tweaked and hot-rodded for going on 13 years. I am SURE the 1000cc can do this all day long, the issue I am not sure about is if it does in a Geo.

Depending on the gearing I am running at the moment my 65 mph rpm is between 2600 and 3500. I am acquainted with a large number of other Suzuki builders in the serious 4x4 world. Suzukis are VERY respected there.

Sometimes, up a long grade, I will run my engine at 6000 rpm for maybe 20 minutes at a time. My engine is mildly modified (compression, spark, port matching & clean-up, Isky cam, header, big exhaust) Some folks who have a Trailer Queen sometimes actually drive them to the trail. Some of them run 5000 as long as they have to, several hundred miles. Gas mileage is terrible though.

The mud racers back east build for peak hp. Some of them, supercharged or turbocharged, CLAIM they turn 10,000 - 12,000 rpm. Here in the rocky mountainous west I build for low-end torque. We NEVER hear of a Zuke with lower end problems. Folks build these up purdy radical sometimes but never need to beef up the lower end. This is the 1324cc. The later 1600 had a coupla years where they had a few problems with the crank. The Zuke seldom has valve problems. I wring mine out all the time, it is my chew-toy, and I have never floated the valves.

My diesel PU runs at 70 mph (at) 1700 rpm.

These engines are VERY tough and long-lived. Even though they are small and have to turn more rpm than a larger vehicle, it is uncommon for one to 'wear out' before hitting 200,000 miles. Lady at church had one, never been opened, bought a new set of radials for her's at 250,000. She said, "Well, it still runs good!". Most of my Zuke friends have at least 200,000 on their rigs when they start building.

These engines have a very light lower end. I can hold the 4 cyl crank straight out at arms length. My toothpick-armed wife can hold the crank in one hand with no trouble. The crank throws are hollow. There is a void cast into them, all the way through. You can poke your thumb through there. Yes, there is a lil hump in there for the oil passage.

I have been bending wrenches for 50 years, and I believe these are GOOD engines.

GeoB


[quote]
Time: 07:38:47 AM PST US
From: "Mel Lewis" <mlewis(at)mlode.com>
Subject: RE: Hi-Rev car engines

My RAV4 at 75MPH is somewhere around 3000.

BUT! . . .If I am going up hill at all, it is so under
powered it drops down
a gear or two and the RPM will go to 4500 at full power to
climb the hill.

I am sure it would run at that 4500 RPM and full power all
day long.

-Mel-


  _____ 

From: owner-engines-list-server(at)matronics.com
[mailto:owner-engines-list-server(at)matronics.com]
On Behalf Of Tracy Crook
Sent: Monday, September 21, 2009 9:40 PM
Subject: Re: Hi-Rev car engines


Probably a little high but smaller engines do tend to be
geared higher than
big ones.  The Mazda MX5 (Miata) turns about 4000 -
4300 at hiway speeds.
My Kawasaki 650 twin turns close to 4800 at 70 mph.

My 13B rotary cruises at 5200 - 5600 at 170 mph (in the
plane) and I have
raced it at 7250 continuously (for 100 mile races).  I
would not feel
comfortable with that rpm if there were pistons in there
stopping & starting
that rapidly.  That might be just a psychological
thing though.

Tracy Crook

On Mon, Sep 21, 2009 at 10:39 PM, Randy L. Thwing <n4546v(at)mindspring.com>
wrote:

do not archive


Hello All:


Today I read this on this list:


"The GEO engine runs all day at 4800 rpm that's equivalent
to 70 mph on the
freeway."


Could everyone or anyone please verify that this is even in
the ball park.


In the last several years that car engines have been
adapted to aircraft, I
have often heard statements such as above where:


"These new hi-revving car engines run all day long at high
rpms.


Between my own experience, and polling friends with small
cars, I haven't
found that to be true.  I'm not challenging anyone and
I have no experience
with a GEO, but I have noted the following:


I had a '89 Jeep Cherokee and a "88 Jeep Comanche pickup,
Identical engines
and running gear, 4.0 litre straight six, turned 2100 rpm(at)
70 mph.


I have a '89 Firebird with a 2.8 lite V6, gets nearly 30
mpg on the highway.
2500 rpm(at) 70 mph.


I have a '98 Toyota 4Runner with 3.4 litre V6, 2400 rpm(at) 70
mph.


I have polled friends with compact Pontiacs, Chevys &
Toyotas, and don't
recall any turning at or over 3000 rpm at 70 mph.


If I have this wrong, please point out specific examples.


Most later models cars have tachs so it's not too hard to
check.


Regards,


Randy, Las Vegas


target="_blank">http://www.matronics.com/Navigator?Engines-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution


________________________________  Message 3 
_____________________________________


Time: 09:29:56 AM PST US
From: Daniel Michaels <nov32394(at)yahoo.com>
Subject: Re: Hi-Rev car engines

A GEO engine is closer to a motorcycle engine than a 6
cylinder car engine.
My Gold wing runs 5000 rpm all day on the freeway red
lines at 8000 rpm si
milar to the GEO at 6500. These little engines have been
running on planes
for some time. The companies that convert them say they run
best at 4800.

Dan

--- On Mon, 9/21/09, Randy L. Thwing <n4546v(at)mindspring.com>
wrote:

From: Randy L. Thwing <n4546v(at)mindspring.com>
Subject: Hi-Rev car engines

=0A=0A =0A =0A=0Ado not archive=0A-=0AHello
All:=0A-=0AToday I read thi
s on this list:=0A-=0A"The GEO engine runs all day at 4800
rpm that's equ
ivalent to 70 mph on the =0Afreeway."=0A-=0ACould everyone
or anyone plea
se verify that this is =0Aeven in the ball park.=0A-=0AIn
the last severa
l years that car engines have =0Abeen adapted to aircraft,
I have often hea
rd statements such as above =0Awhere:=0A-=0A"These new
hi-revving car eng
ines run all day long =0Aat high rpms.=0A-=0ABetween my own
experience, a
nd polling friends with =0Asmall cars, I haven't found that
to be true.-
I'm not challenging anyone =0Aand I have no experience with
a GEO, but I ha
ve noted the =0Afollowing:=0A-=0AI had a '89 Jeep Cherokee
and a "88 Jeep
Comanche =0Apickup, Identical engines and running gear,
4.0 litre straight
six, turned 2100 =0Arpm(at) 70 mph.=0A-=0AI have a '89
Firebird with a 2.8
lite V6, gets =0Anearly 30 mpg on the highway.- 2500 rpm(at)
70 mph.=0A-
=0AI have a '98 Toyota 4Runner with 3.4 litre V6,
=0A2400-rpm(at) 70-mph.
=0A-=0AI have polled friends with compact Pontiacs, Chevys
=0A& Toyotas,
and don't recall any turning at or-over 3000 rpm at 70
=0Amph.=0A-=0AIf
I have this wrong, please point out specific
=0Aexamples.=0A-=0AMost lat
er models cars have tachs so it's not too =0Ahard to
check.=0A-=0A-=0AR
egards,=0A-=0ARandy, Las Vegas=0A-=0A=0A=0A


=0A=0A=0A     

________________________________  Message 4 
_____________________________________


Time: 09:48:39 AM PST US
From: "n801bh(at)netzero.com"
<n801bh(at)netzero.com>
Subject: Re: Hi-Rev car engines

I agree with all that...


Ben Haas
N801BH
www.haaspowerair.com

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