ATWEDITOR@aol.com wrote:
>
> In a message dated 9/10/03 10:32:32 PM, mmorris@nemr.net writes:
>
> << Jay,
>
> What is a stub stack and where do you find them? >>
>
> Monte,
> Go to http://www.aptfast.com/Main_Index_Page.htm, and scroll down to SU Stub
> Stacks & Ram Pipes.
I have stubs under a PiperCross filter but the immediate problem I found
was that they were sucking in lots of really hot, under-bonnet air. At
least the original filter on my '68 had a pipe pointing to the front of
the car (and a little hole in the radiator surround). I could actually
feel the performance drop off as the car heated up.
My solution was to cut a hole in the radiator surround big enough to fit
a short length of flexible tubing (4" wide or there-abouts) which I tied
to the grill at the front and ran back to the Pipercross filter. This
poor-mans' cold-air box (without the box) forced cold external air
across the filter and made a noticable difference to the "warm
performance" of the car.
With such a noticable difference I am tempted to go down the path of
several other competitors with similar cars and actually put a cold air
box on the SUs (which would then require changes to tuning/needles etc.).
That is my experience.
Oh yeah, I went that way because on the dyno I found an extra few
horsepower just by taking off the original filters all together.
Surprised me!
--
Eric
'68MGB MkII
Adelaide, South Australia
/// or try http://www.team.net/cgi-bin/majorcool
/// Archives at http://www.team.net/archive
|