"Jamie Calder" <JCalder3@cfl.rr.com> wrote:
> Any suggestions on which M1 for a NA 408? 2bbl or 4bbl? The 4 bbl seems to
> be about $200 cheaper but I'd get which ever has better performance. I've
> heard that a 4bbl looses to much low end but that's not the case with a
> 408...
Ouch! $200 *cheaper*? Only a few years ago (ok, maybe several),
the entire manifold was $200! :-(
I don't know if this will help you out or not, there is some
limited dyno information on the 4bbl here:
http://www.steigerperformance.com/benefits/dyno
The comparison graphs are from DMLer Bob Tom's '97 318. On that
particular truck, the 4bbl actually made more low end torque than the
stocker (though there was a hole in the 3500-4000rpm range; I'm not
sure if that is a 4bbl characteristic or just that particular truck).
When you were referencing low end losses, I'm not sure if you were
comparing the 4bbl to stock or the 4bbl to the 2bbl; the 2bbl may very
well make more low end than the 4bbl, unfortunately I don't know for
sure since I have not seen any dyno comparisons.
Regarding the low end, if you are able to determine that one or
the other makes less power in that range, that may not necessarily be
the end of the discussion, depending on your intended use for the
vehicle. In a truck, where you have a terrible front/rear weight
bias, an engine with a soft bottom end may not be such a bad thing; it
may give you an opportunity to get hooked up before all the ponies come
on-line without having to put a lot of money into the suspension setup.
Anyhoo, just thought I'd chime in in case any of that is useful to
you. Whichever manifold you end up with, they are both excellent, and
either would be a nice improvement over the stocker.
--
-Jon-
.- Jon Steiger -- jon@dakota-truck.net or jon@jonsteiger.com -.
| '96 Kolb Firefly, '96 Suzuki Intruder, Miscellaneous Mopars |
`-------------------------------- http://www.jonsteiger.com --'
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