[Mgs] new muffler

[Charley & Peggy Robinson]

Um, when I built the engine in the 1970 B  that I had  (sorry I sold 
it)  I had to change the needles in the HS4s so as to richen the 
midrange.  AIR, there were also different jets for hipro engines. You 
sort of juggled jets & needles around.  If you got it right, it pulled 
like a train.  Had a Crane cam in that one.  Ran good.

CR
On 9/17/2012 9:15 AM, PaulHunt73 wrote:
> In my experience changing the breathing i.e. air filters and exhaust 
> will affect mixture *through the throttle range* i.e. you may well get 
> it spot on at idle but with a freer flowing engine find that you get 
> flat spots at a wider throttle opening, I had to go for 'richer' 
> needles on my V8 with these two things modified (by a PO I hasten to 
> add).