Re: Loading up?? (was S6 vs 850)

[ets@wrkgrp.com (Edward T Spire)]

>From: "Arun Rao" <rao@quattro>
>Date: Wed, 28 Aug 1996 11:13:59 -0700
>Subject: Re: S6 vs. Volvo 850 Turbo R (was Re: ipd)
>
>On Aug 28, 10:42am, Steve Powers wrote:
>> Subject: Re: S6 vs. Volvo 850 Turbo R (was Re: ipd)
>> Peter asks:
>>
>> > But isn't the max torque on the 20v turbo engines achieved with some
>> > sort of loading up of the engine to get it at 1950rpm? It sure doesn't
>> > feel like 227ft. lbs. at 1950 when I accelerate from a dead stop.
>>
>> next time you're in downtown Seattle, try this.
>>
>> Turn the corner onto a steep uphill street. You should be in first,
>> possibly second gear. Take your foot off of the gas and feel the
>> motor load up as it climbs the hill. That's torque which carries you
>> up the hill, not horsepower.
>
>	Yes, there's certainly no problem with climbing hills of any
>	kind, but Peter's point is valid: the engine's quite torque
>	deficient before the boost-gauge reads 1.3+ (I heard they
>	did away with the boost gauge on the S4 -- does the S6 have it?).

no, dammit.

>	Chances are that a normally-aspirated 100 (for example) would
>	probably make it up the slope in first gear at idle just fine, too.
>
>	Actually, if you try the test in *third* gear, it's even more
>	interesting. If you stay on the gas for several agonizing seconds
>	while the engine struggles and lugs (not nice sounds!), it *will*
>	eventually make its peak torque rating at the specified rpm and
>	then proceed with alacrity up the slope.

Can anybody explain what's going on here for me?  What exactly is
happening in the engine to cause this "loading up" you describe?


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