Cross over theory/scavenge effect on exhaust.

[Joe Bob]

It's an accepted theory....how to put it into play.

I have a Harley Evo motor on a hard tail "Bobber". Straight drag pipes extend past the rear axle on the right (non drive) side. They block the axle bolt and require removal if I need to change a tire or replace brake pads. (No I can't swap the axle to the other side)

I'm thinking of cutting the length to just after the final support, adding a set of baffles to cut down the decel popping AND adding a cross over to provide a scavenge path.

Anyone been there done that, on the cross over?

Thanks in advance.....please no suggestions to buy a Mac or a Honduh....

[Grog]

Add a fuel controller, if your pop'in on decel, you are too lean. Also get back some of the HP lost from the exhaust mods.

[Joe Bob]

The pop is gone after the baffle addition. Recent plug reads are nice chocolate brown and the pipes are dark on the inside.

It's a carbed Evo. Are fuel controllers an option on non fuel injected engines?

[Grog]

Sorry, don't know much about Harley's, other than they just learned about the wonders of fuel injection.

[Joe Bob]

No worries, it's a bastard just like my 911,,,,

[crustychief]

I just remove my pipes to service the brakes and tire. I don't have to do it but every ten K miles. I am interested in your theory though.

[Joe Bob]

Bobber with a hardtail frame.....08 factory crate motor.