The Viper's V-10 has a hotter cam - probably created more emissions tugging
that big RAM around.....
Also, better breathing does not necessarily equate to better mileage.
Often, you'll get better mileage with smaller intake and exhaust runners, as
they enhance velocity (which in turn increases your manifold vacuum, btw),
but not mass air flow. OTOH, for performance purposes, you need lots of
air flow to get lotsa hp, and this will often kill your velocity at low
rpm's, thus you have no power at lower rpm's (where you do most cruising).
It's really a trade-off between performance and mileage (although there are
some good compromises, such as extrude-honing).
Also keep in mind that with more airflow, you need to burn more fuel to keep
your stoichiometric air/fuel ratio.
-----Original Message-----
From: Jeff Durling <durling@ibm.net>
To: dakota-truck@buffnet.net <dakota-truck@buffnet.net>
Date: Monday, February 22, 1999 10:14 PM
Subject: Re: DML: Viper Truck -Reply
>I wonder why that would happen? Wouldn't the V10 from the viper get about
the
>same gas mileage as the viper, maybe even better? The reason i'm saying
this
>is that you would think that since the viper engine has better flow through
>the engine it would get better gas mileage. I really not an expert just
>wondering. Maybe some moron at chrysler gave the epa the truck to test and
>the epa guy couldn't keep his foot aout of the throttle....hehe. Besides
it's
>not like the V10 that's in the ram gets great gas mileage anyway. We all
keep
>putting up posts about our mileage with the current engines imagine if you
>had a V10.....yikes.
>
>Jeff Durling
>'96 rc sport - 318
>
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