blinx's OFFICIAL EXHUAST THREAD velocity backpressure all explained here.


i have a buddy club spec 2 people have been telling me its bad cuz it has no back box is this true? the exaust sounds good in vtec:nice:
 
craig-ek9 said:
i have a buddy club spec 2 people have been telling me its bad cuz it has no back box is this true? the exaust sounds good in vtec:nice:
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thats not true at all, the backbox does 1 thing, it muffles the sound, it does not affect flow or power in anyway unless its a chambered type of backbox which is rarely used on hondas.

the only reason the spec 2 is bad is cause its so damn loud it gives you a headache :lol: just kidding :)
 
Blinx, I just measured my exhuast diameter, it is 2.5" exactly on the external, Does that mean the internal is 2.25 or 2.38?
 
2.36" lol

all this time I thought I had a 2.25" system. When I measured it, the external was dead on 2.5".... so damn suprised me. :) internal is 2.36"

Thats probally why theres so much difference on my bottom end compared to my stock DC2R B18C. Theres a lot more ballz in my DC2R.
 
jugbugz said:
2.36" lol

all this time I thought I had a 2.25" system. When I measured it, the external was dead on 2.5".... so damn suprised me. :) internal is 2.36"

Thats probally why theres so much difference on my bottom end compared to my stock DC2R B18C. Theres a lot more ballz in my DC2R.
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your dc2r is also a 1.8 .11" in diameter is not going to make any loss or serious gain enough for you to feel it...
 
blinx9900 said:
your dc2r is also a 1.8 .11" in diameter is not going to make any loss or serious gain enough for you to feel it...
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Man, my friend just confirmed with me that if the external diameter is 2.5" then the internal is 2.25" mild steel.

I thought it was a bit strange because the muffler internal diameter looks 2.25" it had me thinking why would they use 2.38in pipes with a 2.25 muffler? haha its all good now.
 
what about if u just knock the cat though then. will this have the same affect as having new de cat pipe?
 
Hey Blinx, I've just signed up on here for a nosey really, as I love the EK9, and your thread was the first one I read. I have a Accord type R or Euro R in the states with the H22A7 and will be getting a custom cat-back made up in the next few weeks.

Would a 3" system really give more gains than say 2.5"?? I always thought 3" was a waste and too big on N/A cars??
 
tofu_man said:
Hey Blinx, I've just signed up on here for a nosey really, as I love the EK9, and your thread was the first one I read. I have a Accord type R or Euro R in the states with the H22A7 and will be getting a custom cat-back made up in the next few weeks.

Would a 3" system really give more gains than say 2.5"?? I always thought 3" was a waste and too big on N/A cars??
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You would be surprised how much exhaust gas large vtec engines produce at high RPM... I have seen a few dyno tests with 3" exhausts showing gains on nearly stock H22 engines with just uprated intake/header. The only dowside is noise, if you can fit a second small muffler in line that would be great :nice: also ground clearence can be sacraficed... if your car is slammed maybe 2.75" would be better...
 
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