Total Motorcycle Community Forums

Toyuzu wrote:

Okay then, I'll drive a Ford for the rest of my days....

Oh, it can happier than THAT!

I have three Fords & I'm happy when I drive them....

CentralOzzy wrote:I have three Fords & I'm happy when I drive them....

Yours were built back when Ford still produced something of value.

Does that go for My 01 V8 Ford Explorer?

The proper mufflers aren't really all that expensive.

https://www.mikesxs.net/mikesxs-exhaust ... ory_id=5.2

Bet you could locate a decent used pair as well.

CentralOzzy wrote:Does that go for My 01 V8 Ford Explorer?

Yep.

iwannadie wrote:i posted this before(pre hack) and didnt ever get the answers, so how come you cant put straights on a crotch rocket? is it the way the inline engine works or something? i know you Can put them on but the engine runs horrible... why do cruises usually run just the same or better with straights.

Well, to get high performance out of an engine, the intake and exhaust will be tuned to use reflected pressure pulses to help move charge through the cylinder and improve breathing.

So to randomly alter the exhaust of a highly tuned performance sport bike by going to straight pipes almost guarantees you'll screw up the balance, sometimes producing intake and exhaust pulses that work against each other and really degrade things.

A cruiser engine is typically not as performance oriented so the intake and exhaust are not as finely tuned. Going to straight pipes may still produce performance degradation, but you may get lucky and improve the tuning, particularly with a "Jessie James" type chopper where the exhaust is nothing more than a randomly tuned piece of sculpture. And even if performance was reduced, it probably wouldn't be as noticable since the bike aren't designed for that.

ok, if you took say an r1 threw some straights on it and had it jetted/dyno tuned and all that could you maintain the engines performance?

not that i would ever do it. just curious how it would work out.

Aquaduct wrote:

iwannadie wrote:i posted this before(pre hack) and didnt ever get the answers, so how come you cant put straights on a crotch rocket? is it the way the inline engine works or something? i know you Can put them on but the engine runs horrible... why do cruises usually run just the same or better with straights.

Well, to get high performance out of an engine, the intake and exhaust will be tuned to use reflected pressure pulses to help move charge through the cylinder and improve breathing.

So to randomly alter the exhaust of a highly tuned performance sport bike by going to straight pipes almost guarantees you'll screw up the balance, sometimes producing intake and exhaust pulses that work against each other and really degrade things.

A cruiser engine is typically not as performance oriented so the intake and exhaust are not as finely tuned. Going to straight pipes may still produce performance degradation, but you may get lucky and improve the tuning, particularly with a "Jessie James" type chopper where the exhaust is nothing more than a randomly tuned piece of sculpture. And even if performance was reduced, it probably wouldn't be as noticable since the bike aren't designed for that.

If straight pipes were the answer for sportbikes, Moto GP grids would be pretty dam loud (yeah, I know the niose regs and all, you get my piont).

Dragbikes prove that you can tune a sportbike engine to work with them.... at exactly one certain RPM and no others. Not the answer for rideablilty.

BuzZz wrote:If straight pipes were the answer for sportbikes, Moto GP grids would be pretty dam loud (yeah, I know the niose regs and all, you get my piont).

Actually they went that route in '04. Something about Ducati starting it and Honda following. They all do it now....