Does tuned pipe outlet dia. make a difference?

[speedfire159]

I was looking for a aftermarket tuned pipe for my car and notice different outlet sizes. What will give the most power and best sound? Or is it like a automobile smaller more hp, bigger better sound? I have a .18 motor and want it to still be able to breathe right, but i saw sizes from .20" to .35" and what are the differences, and what would be best for my size engine?

 

[fdjizm]

A smaller diameter will keep torque down low, a larger diameter will give more top end breathing.

 

[Extreme RC Mods]

I hate to disagree but an engine has more exhaust pressure at lower rpm then it does at higher rpm. A larger stinger will cause lean issues at high rpm when tuned for bottom end or it will run rich in the bottom when properly tuned for top rpm. I have designed a small block pipe that will give you the best of both worlds which will work great from low to top rpm without having any lean or rich tuning issues.

 

[bigbronco]

Very True, the pipe itself makes a difference, but the stinger diameter (whether too large or too small) will kill your tune. Trust me on this one, The Extreme RC Mods pipe is probably the best out there.

 

[speedfire159]

I looked at them last night, I may have to save up for one. I'm a low budget r/c guy. I mean I ran my car stock for the past 3 years, and now my first aftermarket upgrade is gonna be an exhaust pipe. Thanks for the advice!

 

[bigbronco]

no prob, trust me, they are worth the money.