Re: [T3] Abarth repro

["Jim Adney" <jadney@vwtype3.org>]

On 12 Feb 2002, at 12:03, Steven Ayres wrote:

> JimA=> The properly designed OE mufflers,
> 
> OK, to what rpm do you think the stock muffler will flow?
> 
> We don't have enough experimental data to be sure what's causing it, but I
> have a cam designed to top out at about 5500, and I'm running out of torque at
> about 4200. Two excellent mechanics and I agree it's probably the exhaust, which
> is a modified stock muffler on stock heat exchangers. That's why I'm looking at
> alternatives.

There are lots of possibilities, but I assume you feel you've already covered 
them: air intake, carbs, porting, heads, timing (including advance), and 
exhaust.

I think there's a lot of art in this, still, too. You probably won't know until you 
try something different; then you have to keep in mind that the muffler that 
SOUNDS louder will always FEEL stronger. I think it's just human nature.

-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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