full size practise is to use 'oversize' pipes for Max. RPM output.
Smaller dia. pipes to maintain gas speed for torque ,say on a rally car.
Possibly an 'Augmenter " feed arangement as per Al Rabes Mustang.
the header feeding into a flared oversize tailpipe. effectivly making that a seperate system.
Cant be too much trouble to set up your 'test' system on the bench,
or a plank of say 10 x 1 timber, to test attitude reaction.
(whilst keeping your face well clear of the prop.Maybe some safty googles ! )
More prattle ; the old 'hot rod ' bible refers to 'tuned lengths ' - wave cycle.
on a metal Ex. pipe ,running a bead of paint down the pipe,
it burs of at the Tuned Lengths, note plural . So, youd fit the resonator at say the third
Hot Spot , to keep Ex. Gas temp (and speed ) up, then pipe to muffler,probly using the paint trick again.
The Resonator ,is a straight thru Glass Pack heat chamber, which effectively
holds the front section at working temperature ,
Any car / M-cycle is a pig to drive on the gravel with an oversize system,
as it has baulky throttle responce (pick up )below say half revs.
which means you have to go really fast . . . .
Maybe pick up a pile of different size off-cuts from a workshop,
or retail Alloy tubes not expensive in smaller sizes,
so armed with a notebook, you can use a few ? hours finding what works were your aiming.
A guess is a Mini pipe feeding into the Exhaust at the bulkhead behind the fuel tank .
And dont let the 'test plank' get all oily , the old tin of grits for hand grip Trick ?& a good rag or 3.
Topic: Exhaust pipe? (Read 1565 times)