What exactly are open headers?
Thread Starter
2nd Gear Member
Joined: Dec 2005
Posts: 494
From:
RE: What exactly are open headers?
Now would this be street legal? more specifically legal in south carolina (remember, SC doesnt have the state car "check ups")
And what would this sound like on a stock 06 GT?
And what would this sound like on a stock 06 GT?
6th Gear Member
Joined: Jan 2006
Posts: 6,054
From: Laredo, TEXAS
RE: What exactly are open headers?
technically it wouldnt be legal anywhere cuz youre bypassing smog ****, but who am I to talk... 
Remember though, it will be loud (not necessarily cool loud), probably stinky and maybe dangerous if youre out parking with your chick and leaving the engine run for heat, etc... and maybe others can comment on hp but I dont think you will see a noticable gain in hp...
Remember though, it will be loud (not necessarily cool loud), probably stinky and maybe dangerous if youre out parking with your chick and leaving the engine run for heat, etc... and maybe others can comment on hp but I dont think you will see a noticable gain in hp...
3rd Gear Member
Joined: Jan 2006
Posts: 757
From: Chicago
RE: What exactly are open headers?
Woah! No gain from open headers?? My how far we've fallen from our old-school days. Sorry, no offense meant.
Yes sir, you would see a gain in most applications as your exhaust is about as free flowing as it's going to get. There's some caveats here:
1. This assumes you have headers (no comment on an open exhaust manifold) and a straightforward enough exhaust system to do it--on our cars you'd have to plumb the O2 sensors somewhere (if I'm not mistaken, one or more are aft of the exhaust manifold on ours).
2. Sometimes a well excecuted reducer (proper length) will help overall power (relative to open headers), but either combo will definitely out produce a muffled set-up.
3. An exceptionally well done fully muffled exhaust system (race quality) will come very close to the full power production of open headers--so close, it's scary. Unfortunately, few of us have ever come within 10' of one on the street.
4. On the street, it's hellaciously LOUD! Not cool, not even close to cool, and unless your local po-po is just certifiably deaf, they'll make up laws just to get you out of the street. This is track only stuff.
Best,
-j
Yes sir, you would see a gain in most applications as your exhaust is about as free flowing as it's going to get. There's some caveats here:
1. This assumes you have headers (no comment on an open exhaust manifold) and a straightforward enough exhaust system to do it--on our cars you'd have to plumb the O2 sensors somewhere (if I'm not mistaken, one or more are aft of the exhaust manifold on ours).
2. Sometimes a well excecuted reducer (proper length) will help overall power (relative to open headers), but either combo will definitely out produce a muffled set-up.
3. An exceptionally well done fully muffled exhaust system (race quality) will come very close to the full power production of open headers--so close, it's scary. Unfortunately, few of us have ever come within 10' of one on the street.
4. On the street, it's hellaciously LOUD! Not cool, not even close to cool, and unless your local po-po is just certifiably deaf, they'll make up laws just to get you out of the street. This is track only stuff.
Best,
-j
6th Gear Member
Joined: Jan 2006
Posts: 6,054
From: Laredo, TEXAS
RE: What exactly are open headers?
I guess what I was trying to say is that with the gain in hp vs. the difference in ET with nothing else done wouldnt be that great (I think)... At least that was what i was trying to say... 
ORIGINAL: Philostang
Woah! No gain from open headers?? My how far we've fallen from our old-school days. Sorry, no offense meant.
Yes sir, you would see a gain in most applications as your exhaust is about as free flowing as it's going to get. There's some caveats here:
1. This assumes you have headers (no comment on an open exhaust manifold) and a straightforward enough exhaust system to do it--on our cars you'd have to plumb the O2 sensors somewhere (if I'm not mistaken, one or more are aft of the exhaust manifold on ours).
2. Sometimes a well excecuted reducer (proper length) will help overall power (relative to open headers), but either combo will definitely out produce a muffled set-up.
3. An exceptionally well done fully muffled exhaust system (race quality) will come very close to the full power production of open headers--so close, it's scary. Unfortunately, few of us have ever come within 10' of one on the street.
4. On the street, it's hellaciously LOUD! Not cool, not even close to cool, and unless your local po-po is just certifiably deaf, they'll make up laws just to get you out of the street. This is track only stuff.
Best,
-j
Woah! No gain from open headers?? My how far we've fallen from our old-school days. Sorry, no offense meant.
Yes sir, you would see a gain in most applications as your exhaust is about as free flowing as it's going to get. There's some caveats here:
1. This assumes you have headers (no comment on an open exhaust manifold) and a straightforward enough exhaust system to do it--on our cars you'd have to plumb the O2 sensors somewhere (if I'm not mistaken, one or more are aft of the exhaust manifold on ours).
2. Sometimes a well excecuted reducer (proper length) will help overall power (relative to open headers), but either combo will definitely out produce a muffled set-up.
3. An exceptionally well done fully muffled exhaust system (race quality) will come very close to the full power production of open headers--so close, it's scary. Unfortunately, few of us have ever come within 10' of one on the street.
4. On the street, it's hellaciously LOUD! Not cool, not even close to cool, and unless your local po-po is just certifiably deaf, they'll make up laws just to get you out of the street. This is track only stuff.
Best,
-j
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