I think a low restriction exhaust with less back pressure is more likely to
pop as well as a car with a hotter camshaft. My bugeye has long center
branch headers, a fast road camshaft and what BMC called their "competition
muffler" and sounds just like the bugeye racers I recall from Lime Rock.
It's like a bowl of Rice Krispies with all the snaps, crackles and pops.
And the Nasty Boy? Really low restriction exhaust and hotter cam. Sounds
gorgeous on the overrun.
On Fri, Oct 10, 2014 at 9:10 AM, Bob Spidell <bspidell@comcast.net> wrote:
>
>
> At times, my BJ8 has not popped on decel/downhill/etc. with different
> exhaust systems. Don't know why, I've kept pretty much the jet/mixture
> setting as long as I've had the car (31 years). Currently, I'm using an
> exhaust cobbled together from Ansa pipes with Heartthrob mufflers (from
> good ol' JC Whitney; I call it 'Frankenmuffler'). It pops a lot, including
> some pretty loud bangs with closed throttles going downhill. I put an 'H'
> pipe between the pipes fore the front mufflers; suspect that contributes
> but danged if I know why.
>
> Bob
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