US Headers & Exhausts NA

[project.r.racing]

All I can say from this point on is - get an education.

Can't help you if you can't understand.

Judging from the posts in this thread. Only you seem be be the one without understanding on this matter.

The more you type, the more understanding and you grow further apart. I think it is currently 2 kilometers and growing.

I've even highlighted the errors between you own thoughts and what you copied and pasted from wiki, and you are still saying we dont understand. You clearly dont understand it. you look straight past them only to challenge others understanding.

[Dupain]

All I can say from this point on is - get an education.

Can't help you if you can't understand.

Judging from the posts in this thread. Only you seem be be the one without understanding on this matter.

The more you type, the more understanding and you grow further apart. I think it is currently 2 kilometers and growing.

I've even highlighted the errors between you own thoughts and what you copied and pasted from wiki, and you are still saying we dont understand. You clearly dont understand it. you look straight past them only to challenge others understanding.

You don't understand. I copied and pasted that definition from wiki as that is the definition. Show me your evidence from a published source? Can you find one? Come back to me when you do.

[ED_MX5]

This is so hilarious.
Please continue.

Maybe words from a shelia can sort out the queries. I've tried my best to explain.

I have to butt in here.
Have your discussion with others sure, you may differ in oppinions/knowledge.
Some people here know lots, some know a little. Just be aware that being a SHEILA has nothing to do with knowledge! If your going to criticise, just get them to prove why they are right. Being sexist is not going to solve your problem mate.

Good luck with your car btw, looking good. Hopefully will sound good too.

[Dupain]

This is so hilarious.
Please continue.

Maybe words from a shelia can sort out the queries. I've tried my best to explain.

I have to butt in here.
Have your discussion with others sure, you may differ in oppinions/knowledge.
Some people here know lots, some know a little. Just be aware that being a SHEILA has nothing to do with knowledge! If your going to criticise, just get them to prove why they are right. Being sexist is not going to solve your problem mate.

Good luck with your car btw, looking good. Hopefully will sound good too.

Why would emily_mx5 find it so hilarious? Where is the documented evidence of their definition ED_MX5? I've provided a definition from wiki and there are others easily found.

[project.r.racing]

This is so hilarious.
Please continue.

Maybe words from a shelia can sort out the queries. I've tried my best to explain.

I have to butt in here.
Have your discussion with others sure, you may differ in oppinions/knowledge.
Some people here know lots, some know a little. Just be aware that being a SHEILA has nothing to do with knowledge! If your going to criticise, just get them to prove why they are right. Being sexist is not going to solve your problem mate.

Good luck with your car btw, looking good. Hopefully will sound good too.

Why would emily_mx5 find it so hilarious? Where is the documented evidence of their definition ED_MX5? I've provided a definition from wiki and there are others easily found.

The wiki definition is fine.

But what you describe as unequal length runners and different ID size pipes is not what tuned length headers are.

The problem is that your definition and wikis definition are different.

Deal with it and grow up. Get educated.

[Dupain]

This is so hilarious.
Please continue.

Maybe words from a shelia can sort out the queries. I've tried my best to explain.

I have to butt in here.
Have your discussion with others sure, you may differ in oppinions/knowledge.
Some people here know lots, some know a little. Just be aware that being a SHEILA has nothing to do with knowledge! If your going to criticise, just get them to prove why they are right. Being sexist is not going to solve your problem mate.

Good luck with your car btw, looking good. Hopefully will sound good too.

Why would emily_mx5 find it so hilarious? Where is the documented evidence of their definition ED_MX5? I've provided a definition from wiki and there are others easily found.

The wiki definition is fine.

But what you describe as unequal length runners and different ID size pipes is not what tuned length headers are.

The problem is that your definition and wikis definition are different.

Deal with it and grow up. Get educated.

Where's you evidence project-r-racing? I have told you I'll review the product when I get it. My definition is the same as wiki. Whats this about abusing me about getting an education. Have two degrees from Sydney University and one was Chemical Engineering and it included fluid dynamics 1&2.

What 4-1 system do you reccomend I buy?

[project.r.racing]

This is so hilarious.
Please continue.

Maybe words from a shelia can sort out the queries. I've tried my best to explain.

I have to butt in here.
Have your discussion with others sure, you may differ in oppinions/knowledge.
Some people here know lots, some know a little. Just be aware that being a SHEILA has nothing to do with knowledge! If your going to criticise, just get them to prove why they are right. Being sexist is not going to solve your problem mate.

Good luck with your car btw, looking good. Hopefully will sound good too.

Why would emily_mx5 find it so hilarious? Where is the documented evidence of their definition ED_MX5? I've provided a definition from wiki and there are others easily found.

The wiki definition is fine.

But what you describe as unequal length runners and different ID size pipes is not what tuned length headers are.

The problem is that your definition and wikis definition are different.

Deal with it and grow up. Get educated.

Where's you evidence project-r-racing? I have told you I'll review the product when I get it. My definition is the same as wiki. Whats this about abusing me about getting an education. Have two degrees from Sydney University and one was Chemical Engineering and it included fluid dynamics 1&2.

If you understand fluid dynamics, the you should understand that changing pipe lengths and diameters change fluid velocity and vaccuum between 2 merging fluids.

So if you want 4 pipes to flow evenly into 1 singlepipe, wouldn't you want all of those 4 pipe to have the same resistence and velocity???

Otherwise the vaccumm created by 1 going at a faster velocity will also mess up the other 3???

By changing 1 pipe to a smaller diameter, that will create resistance at the start of the pipe, and increased velocity at the end of that same pipe.

So you change 1 pipe to be slight smaller diamter than the other 3. You create more resistance. You have less exhaust scavenging. So you have already decrease power from cylinder 1. Finally the gasses hit the collect at a high velocity upsetting the equal vaccuum created from the other 3 pipes.

All pipes need to be the same size to give equal resistence and gas velocity.
All pipe need to be equal length so the gases hit the collector and the vaccuum is equally controlled.

If you dont have this, you might as well just by a quick welded $250 header job from mr muffler down the road. Cos you'll only get the same results. Although mr mufflers will be made from cast iron and last 10x longer.

Lets go mr 2 degrees. Explain fluid dynamics to us?

[Dupain]

That's the system I bought and will review it when it gets here. No one has made a reccomendation on what 4-1 system would be best to buy but very quickly the critizise a company that produces successfully at affordable prices without evidence/actual data but just heresay.

[project.r.racing]

That's the system I bought and will review it when it gets here. No one has made a reccomendation on what 4-1 system would be best to buy but very quickly the critizise a company that produces successfully at affordable prices without evidence/actual data but just heresay.

If you go back to page 1, you will see many point out the the pipe lengths are all different lengths. The lengths are quite easy to see from the supplied pics. You being a smart educated man with fluid dymanics expertise should have noticed the different length pipes?

[Black_Penguin]

So decades of successful header design = hearsay. Also those primaries are way too short, they might start working by the time the valves start coming out of the top of the head.

[Pamex]

I love the classic "I am the only dissenting opinion between many people THEREFORE THEY ARE ALL WRONG AND I AM RIGHT".

To be honest, for that price, why not buy a welder and a flex join and do it yourself? You seem so knowledgeable on the subject, it shouldn't be too hard for you.

[Dupain]

That's the system I bought and will review it when it gets here. No one has made a reccomendation on what 4-1 system would be best to buy but very quickly the critizise a company that produces successfully at affordable prices without evidence/actual data but just heresay.

If you go back to page 1, you will see many point out the the pipe lengths are all different lengths. The lengths are quite easy to see from the supplied pics. You being a smart educated man with fluid dymanics expertise should have noticed the different length pipes?

Deary me, its about the gases from each cylinder getting to the collector at the same time. If you look at vivid's equal length headers for the wrx sti, it is easier to understand.

[Dupain]

I love the classic "I am the only dissenting opinion between many people THEREFORE THEY ARE ALL WRONG AND I AM RIGHT".

To be honest, for that price, why not buy a welder and a flex join and do it yourself? You seem so knowledgeable on the subject, it shouldn't be too hard for you.

My 5 is not a daily. It's a hobby for me and like many on here like tinkering with it, trying new products. Was looking at a 4-1 system. I think Apexi makes one and they are hard to find and over $2000 new to get here.

The original question was with regards to fitments of US headers remember.

[project.r.racing]

That's the system I bought and will review it when it gets here. No one has made a reccomendation on what 4-1 system would be best to buy but very quickly the critizise a company that produces successfully at affordable prices without evidence/actual data but just heresay.

If you go back to page 1, you will see many point out the the pipe lengths are all different lengths. The lengths are quite easy to see from the supplied pics. You being a smart educated man with fluid dymanics expertise should have noticed the different length pipes?

Deary me, its about the gases from each cylinder getting to the collector at the same time. If you look at vivid's equal length headers for the wrx sti, it is easier to understand.

NO!!!

It's about the gasses getting to the collector at differently evenly spaced times, so they cause a vaccuum effect for the other pipes.

They will only get to the collector at evenly spaced times if all the resistence and velocity are all the same. As the combustion of each cylinder is evenly spaced out between all firing cylinders.

[Dupain]

That's the system I bought and will review it when it gets here. No one has made a reccomendation on what 4-1 system would be best to buy but very quickly the critizise a company that produces successfully at affordable prices without evidence/actual data but just heresay.

If you go back to page 1, you will see many point out the the pipe lengths are all different lengths. The lengths are quite easy to see from the supplied pics. You being a smart educated man with fluid dymanics expertise should have noticed the different length pipes?

Deary me, its about the gases from each cylinder getting to the collector at the same time. If you look at vivid's equal length headers for the wrx sti, it is easier to understand.

NO!!!

It's about the gasses getting to the collector at differently evenly spaced times, so they cause a vaccuum effect for the other pipes.

Get the pic up if you can and have a look.