Performance Headers, HOW MUCH!!!!
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From: midlands
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sorry to go off on another topic.......you say a 20g will boost too 1.3 bar,can a standard 16g not boost to 1.3 bar? or are these figure's relative to the turbo fitted.ie: 1.3 on a 20g is more than 1.3 on a 16g...hope my question makes sence
it all depends on your spec??? standard headers (ported) allow the car to make boost earlier !!! but aftermarket headers allow the car to make more boost than what standard headers can achieve !!! say for example you have a 20g turbo and standard headers !!! you might make full boost 400rpm earlier but you may only make 1.3bar max, with aftermarket headers you will make 1.5bar but achieve full boost 400rpm later !! this is just an example and not a fact on every vehicle 
They will boost to what they are mapped to do, at least 1.7 bar on some cars
pmsl thats why i said it my little quote at the end !! i was just using those little figures to give an idea on how aftermarket headers work
each car is different and so is boost targets !! i was just saying aftermarket headers will let you run more boost and using an example
Sorry, I didn't know they drove ordinary cars on ordinary streets in ordinary towns like the rest of us!! 
My 215 BHP STANDARD Impreza will equal (if not humiliate, due to my superior driving skills) most other Imprezas ... even if modded to 600 BHP - in the 'real World' !!
And thats the plain truth ............
My 215 BHP STANDARD Impreza will equal (if not humiliate, due to my superior driving skills) most other Imprezas ... even if modded to 600 BHP - in the 'real World' !!
And thats the plain truth ............
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From: In your MOMMA!!!!
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You on drugs... or have you OD on ovaltine
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From: In your MOMMA!!!!
Sorry, I didn't know they drove ordinary cars on ordinary streets in ordinary towns like the rest of us!!
My 215 BHP STANDARD Impreza will equal (if not humiliate, due to my superior driving skills) most other Imprezas ... even if modded to 600 BHP - in the 'real World' !!
And thats the plain truth ............
My 215 BHP STANDARD Impreza will equal (if not humiliate, due to my superior driving skills) most other Imprezas ... even if modded to 600 BHP - in the 'real World' !!
And thats the plain truth ............
Sorry, I didn't know they drove ordinary cars on ordinary streets in ordinary towns like the rest of us!!
My 215 BHP STANDARD Impreza will equal (if not humiliate, due to my superior driving skills) most other Imprezas ... even if modded to 600 BHP - in the 'real World' !!
And thats the plain truth ............
My 215 BHP STANDARD Impreza will equal (if not humiliate, due to my superior driving skills) most other Imprezas ... even if modded to 600 BHP - in the 'real World' !!
And thats the plain truth ............
well that rules mine out pete as mine is only 500bhp so im no where near your skills
just taken my equal length headers / manifold off as i'm selling my scooby and i want them for the next one. they do make a difference. i found they give more torque gain than bhp. an example of this is, with the standard headers / manifold the car doesn't really like doing "a pslewis" 30mph in 5th gear. put the equals on and it'll sit there a treat. granted i don't think that will gain you tonnes of power but they will change the characteristics of the car.
porting will make a difference. take your headers / manifold off and look at the carbon build up line around the pipe hole. open it up and smoth it off and the gases will flow faster as they have a larger escape route. example of this on modern engines is the 325 and 328 inlet manifolds from bmw. the reason why there is only 1 bhp difference in the cars output. the 328 inlet manifold is more restrictive to keep the car under 200bhp. This is a german thing as cars over 200bhp in germany make the insurance go through the roof. put a 325 larger bore inlet manifold on a 328 and you'll get some good gains. i know this as i've done it.
porting will make a difference. take your headers / manifold off and look at the carbon build up line around the pipe hole. open it up and smoth it off and the gases will flow faster as they have a larger escape route. example of this on modern engines is the 325 and 328 inlet manifolds from bmw. the reason why there is only 1 bhp difference in the cars output. the 328 inlet manifold is more restrictive to keep the car under 200bhp. This is a german thing as cars over 200bhp in germany make the insurance go through the roof. put a 325 larger bore inlet manifold on a 328 and you'll get some good gains. i know this as i've done it.
just taken my equal length headers / manifold off as i'm selling my scooby and i want them for the next one. they do make a difference. i found they give more torque gain than bhp. an example of this is, with the standard headers / manifold the car doesn't really like doing "a pslewis" 30mph in 5th gear. put the equals on and it'll sit there a treat. granted i don't think that will gain you tonnes of power but they will change the characteristics of the car.
porting will make a difference. take your headers / manifold off and look at the carbon build up line around the pipe hole. open it up and smoth it off and the gases will flow faster as they have a larger escape route. example of this on modern engines is the 325 and 328 inlet manifolds from bmw. the reason why there is only 1 bhp difference in the cars output. the 328 inlet manifold is more restrictive to keep the car under 200bhp. This is a german thing as cars over 200bhp in germany make the insurance go through the roof. put a 325 larger bore inlet manifold on a 328 and you'll get some good gains. i know this as i've done it.
porting will make a difference. take your headers / manifold off and look at the carbon build up line around the pipe hole. open it up and smoth it off and the gases will flow faster as they have a larger escape route. example of this on modern engines is the 325 and 328 inlet manifolds from bmw. the reason why there is only 1 bhp difference in the cars output. the 328 inlet manifold is more restrictive to keep the car under 200bhp. This is a german thing as cars over 200bhp in germany make the insurance go through the roof. put a 325 larger bore inlet manifold on a 328 and you'll get some good gains. i know this as i've done it.
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I mean, put an Impreza into the hands of, say, a Kiddie of 25-35 years old and you are not going to get the same ability and ground coverage as in the hands of a 78 year old with masses of experience.
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From: In your MOMMA!!!!
I test drove a standard UK WRX a few years ago, flat as F**K!
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Like I said .... it's the drivers skill that counts - you clearly need the extra BHP to cover the ground as an experienced driver can do.
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Agreed with driving skills one for sure.
I mean, Don Palmer or such suitably skilled personage would pi$$ all over me in his standard 'what-ever-he-drives' car against me in my Subaru.
But the thing is Pete, whatever floats your boat innit surely?
Why do you get so passionate about ppl spending money on their own cars?
You enjoy yours as standard and we pay lots on ours
And lots is the key phrase for me! LOL.
Got new headers on mine but i ain't sure i am getting the full 500 bhp with them on as opposed to the 280 without, what you think Pete?
And i aint got a cocklink to check
I mean, Don Palmer or such suitably skilled personage would pi$$ all over me in his standard 'what-ever-he-drives' car against me in my Subaru.
But the thing is Pete, whatever floats your boat innit surely?
Why do you get so passionate about ppl spending money on their own cars?
You enjoy yours as standard and we pay lots on ours
And lots is the key phrase for me! LOL.
Got new headers on mine but i ain't sure i am getting the full 500 bhp with them on as opposed to the 280 without, what you think Pete?
And i aint got a cocklink to check
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From: In your MOMMA!!!!
If your a **** driver you remain a **** driver, unless your like me and have been Police trained!!!