[Shotimes] Rod Bearing Change @190K miles

[Ron Porter]

Don, you are using a "textbook" lugging description.

ATX SHOs "do" lug, as I and others have described. When a certain level of
throttle input causes the engine to strain (and ping) against a locked TC in
3rd or 4th in a sub-2 rpm range, that's lugging.

Those textbook descriptions were fine for lower-geared older cars, but it's
a new definition in today's world.

Ron Porter

-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of Donald Mallinson
Sent: Thursday, February 02, 2006 11:57 AM
To: shotimes@autox.team.net
Subject: Re: [Shotimes] Rod Bearing Change @190K miles

I still point out that unless the engine is under some sort of distress 
at a fairly large (50% or more) throttle position, that it isn't 
"lugging".  What you and ron pretty much describe isn't much more than 
cruising or a fast idle.  Nearly zero throttle opening and no real 
stress on the engine.

It doesn't hurt the engine to run at nearly zero throttle at low rpm's.  
To Lug, the engine really needs to be well below 1000 rpm and at a 
fairly large throttle position in a high gear. 

Just not possible with a properly working automatic.

Don

Dave Garber wrote:

> Well, with my 99 and my 97 and dad's 96, the V8SHO ATX was FAR from 
> consistent! There were times when all of them worked perfectly and 
> never 'lugged'. But there are many times when they did. As I mentioned 
> in my last post, I was able to demonstrate this to Megan in the 99 
> last night..
>
> The point is, it IS possible to lug these damn things. No, not 
> consistently (at least for me), but often enough for it to contribute 
> to engine wear IMO..
>
>
> Dave Garber
> Pittsburgh, PA
> 99 White, 94k
>
>
> ----- Original Message ----- From: "Donald Mallinson" 
> <dmall@mwonline.net>
> To: <shotimes@autox.team.net>
> Sent: Wednesday, February 01, 2006 7:20 PM
> Subject: Re: [Shotimes] Rod Bearing Change @190K miles
>
>
>> Just for fun, while out running errands today, I did some 
>> experimentation with the 96 V8.
>>
>> The Torque converter will not lock up below 25 mph at all, I suspect 
>> this is built into the computer.  At 24 mph the engine was turning 
>> appox 1500 rpm and as soon as you gave it any gas at all it was near 
>> 2000 rpm and smooth as glass.
>>
>> At 25 mph, the torque converter would lock up in high gear and the 
>> engine would turn 1300 rpm.  To accomplish this you had to have a 
>> feather foot on the gas and just barely touch it or the torque 
>> converter would not lock up.  At this point I could give it maybe 10% 
>> throttle or less before the converter unlocked and rpm's rose above 
>> 1500.  At very slight throttle openings, the engine stayed near 
>> 1300-1400 rpm till speed rose, and the engine was again....smooth as 
>> glass.  No sign of distress or any noise, growling, bucking that are 
>> sure signs of lugging.
>>
>> As soon as you gave it any more gas pedal, the torque converter 
>> unlocked and we were into 1500+ rpm and a very happy engine.
>>
>> So there is just one limited time where rpm's will be below 1500 and 
>> it takes a lot of concentration to force the car to 25 to 27 or so 
>> mph and a very light foot to keep it below 1500 rpm.  And again, no 
>> sign at all of engine distress.  It would take a very concentrated 
>> effort and specific goal to keep the V8 SHO below 1500 rpm for more 
>> than a very few seconds and if you have ANY traffic, forget it, you 
>> will be all over the rpm scale but not anywhere below 1500.
>>
>> Don Mallinson
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