32 replies to this topic

[JakesTe]

Does a larger exhaust tip end affect power or sound?

[nicklouse]

yes

[panky]

Love the sound of the 1 3/4" Millenium stainless RC-40 fitted to my car  It's been on about 15 years and still looks like new.

[JakesTe]

yes

In what way?

[RooBoonix]

Love the sound of the 1 3/4" Millenium stainless RC-40 fitted to my car  It's been on about 15 years and still looks like new.

 

Single or twin box? 

[JakesTe]

So I think from my research I have come to it that a smaller bore, about 1.75" would be best for performance but would not sound as good, and be raspy.

And larger bore would sound really nice but loose a little HP.

Am I right in saying this?

 

Basically, sound is very important to me.

If I did a Fletcher pro flow manifold (about 1.8") into a Fletcher 2.5" side exit with a LCB link pipe, would I be losing much power??

Sorry for all the questions, but i appreciate your help! :)

[Cooperman]

What happens when you go from one size of pipe, say the ideal of 1.75" diameter, into a larger diameter pipe is the velocity of the exhaust gas slows down. When a fluid moves along a pipe, if the velocity decreases the pressure increases, so the ideal molecular flow is spoiled and the higher pressure causes a loss of power.

 

You can either fit the correct size in engineering terms, or have what is often referred to as a 'power sapping noise booster'. It is your car, so you choose.

[JakesTe]

What happens when you go from one size of pipe, say the ideal of 1.75" diameter, into a larger diameter pipe is the velocity of the exhaust gas slows down. When a fluid moves along a pipe, if the velocity decreases the pressure increases, so the ideal molecular flow is spoiled and the higher pressure causes a loss of power.

 

You can either fit the correct size in engineering terms, or have what is often referred to as a 'power sapping noise booster'. It is your car, so you choose.

Ok thanks Cooperman

[burchy35]

Playmini single box! Sound mint and not too loud inside. I have had many combinations of engines and exhausts.
The playmini has always produced great results and sounds great with really good build quality.

Roy B

[panky]

 

Love the sound of the 1 3/4" Millenium stainless RC-40 fitted to my car  It's been on about 15 years and still looks like new.

 

Single or twin box? 

 

 

Twin box centre exit with a Maniflow LCB. The engine is a 1293 with stage 3 head and Metro cam, goes nice.

[Cooperman]

I do wonder why some owners who have what is a slow and classic old car want to make it noisier.

If it is a real race car, then that is a different matter.

[burchy35]

It's about what ever rocks your boat. I like to see minis in all kinds of form. Original standard or modified. I respect them all and the owners. And not all minis have to be slow. I hated bog standard 850 mini van and a 1275gt with a 1460 turbo motor. I love driving them both.

[johnR]

I do wonder why some owners who have what is a slow and classic old car want to make it noisier.

If it is a real race car, then that is a different matter.

Probably because it was a loud racecar that inspired buying it - I don't know about you but I like the exhaust to give a bit of a hint of a potent motor then a good shout out under acceleration.

The one thing I miss from my old SRV8  is the bark from open sidepipes setting off car alarms.

[nicklouse]

single box RC40 will be being changed shortly

https://youtu.be/jOcs3fpquIs

[JakesTe]

So I have decided to go with a Maniflow side exit stainless 1.75" single box and I already have a glasspack muffler that I may or may not use.

One last question I have is, is it better to go with a freeflow manifold and link pipe or a manifold with an LCB?