angled exhausts


V

vin.ek

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Dec 8, 2011
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27
Well, last night my exhaust popped off from the b pipe again. The previous owner had a catback done, but obviously to a terrible standard. So, my cars been booked in to have the system done again on monday.

Its an ek3 so 1.5 sohc vtec, the previous owner had a full system done.. 2.5 inch from manifold :angry2:

I'm thinking of, 2" straight from manifold to get some pressure back?

I'm gonna go with an angled exhaust, but dunno what style backbox, as in what size tip, over or under lca n what kinda angle (thinking 45 degrees)

Anyone got any pictures they could show me with some sort of spec, so i can get an idea?

Thanks in advance!
 
IMAG0151.jpg


IMAG0153.jpg


IMAG0138.jpg


These were taken on my 9
 
Topher-EK9 said:
I just can't see how this gets you angry ???

:angry: What pressure exactly are you trying to get back... ??
Click to expand...

2.5" on a 1.5 sohc engine? back pressure didnt mean anything to the previous owner lol.

Sid-ek9 said:
IMAG0151.jpg


IMAG0153.jpg


IMAG0138.jpg


These were taken on my 9
Click to expand...

Woah that looks mad lol! Is that a buddyclub spec? Seeing that its uncer lca, dont u get problems with it scraping?
 
Are you planning to swap engines? If so I'd keep your 2.5" system.
 
vin.ek said:
2.5" on a 1.5 sohc engine? back pressure didnt mean anything to the previous owner lol.
Click to expand...

Funnily enough i thought you'd mention back pressure..
the previous owner was correct, you don't need or want any back pressure..
even wikipedia quotes it as having a negative effect on engine efficiency resulting in a decrease of power output


Stick with 2.5" :nice:
 
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Topher-EK9 said:
Funnily enough i thought you'd mention back pressure.. do some more research dude... you don't want any back pressure.
"free flowing exhaust" back pressure is technically resistance in the exhaust system. you don't want any ...

please don't put a 2" pipe on there. the EK4 for example comes with a 2.25" system..
Click to expand...

:nice:

Back Preasure = bad.

Very common myth. Its all down to velocity and pulse waves in the manifold. But all that is prity much over and done by once the gasses are out of the manifold and into the system. From there they just need to get out as easily and fast as possible.

2.5" is the way to go. Best flow before getting overly loud.
 
vin.ek said:
Woah that looks mad lol! Is that a buddyclub spec? Seeing that its uncer lca, dont u get problems with it scraping?
Click to expand...

I did, but then I just avoided speed bumps, pot holes, cats-eyes etc as much as possible. Don't have a clue what exhaust it is but it's surprisingly not as loud as you'd think ;)

How it sounded:

 
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