Header

CPSycho

Wrench Pro
Points
26
From
Kuala Lumpur, Malaysia
Car
Proton Gen2 CPS
i've own a 2008 proton gen2 1.6 with CPS engine. now my header is 4-2-1...
i'm thinking to change 4-1 but not like vtec long 4-1 type, this type shorter than that. what do u guys thinks about that...
i really into for the high torques...

p/s- i'm not good in english...:amuse:
 

Prince

Torque King
Points
242
From
Northampton, England
Car
BMW E36 318is Coupe
Hi mate, your English is fine mate so don't worry about that.

The reason why the best header on a VTEC engine is 4-1 is because it increases power at higher RPM, that's where the power band is on a Honda.

I've never owned or driven a Proton so you have to know where the power band is to know what's best.
 

CPSycho

Wrench Pro
Points
26
From
Kuala Lumpur, Malaysia
Car
Proton Gen2 CPS
A 4-1 design will probably be best then. A 4-1 setup increase power high up the rpm range, whilst a 4-2-1 design increases power lower down the rpm range.

What exhaust system are you using?
actually my exhaust system is nameless, it's a local made. in Malaysia we call it "cap ayam" is mean "chicken brand" for local made exhaust system. the chicken brand are the only brand that i can afford. i only changed the 421 header,2" mid box (cylinder type) and 2" muffler(oval type) with 5" exhaust tip. my exhaust pipes is still original and the diameter is 2".
with 4-1, did i get the low torque power?

this is one of the sample of the 4-1 header made in Malaysia. :blink1:
 

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Prince

Torque King
Points
242
From
Northampton, England
Car
BMW E36 318is Coupe
actually my exhaust system is nameless, it's a local made. in Malaysia we call it "cap ayam" is mean "chicken brand" for local made exhaust system. the chicken brand are the only brand that i can afford. i only changed the 421 header,2" mid box (cylinder type) and 2" muffler(oval type) with 5" exhaust tip. my exhaust pipes is still original and the diameter is 2".
with 4-1, did i get the low torque power?

this is one of the sample of the 4-1 header made in Malaysia. :blink1:
The 4-1 header (we call them exhaust manifolds) increases power high in the rpm range. So with your redline being at 6000 at your power starting at 4300 it's your best option. A 4-2-1 would increase power where your car won't use it.

A 2 inch diameter is probably about right. What BHP does your car produce?

The sample in the picture looks good. Check the welded areas to make sure they are ok as some of the cheap ones can blow and cause problems.
 

CPSycho

Wrench Pro
Points
26
From
Kuala Lumpur, Malaysia
Car
Proton Gen2 CPS
oo ok, so u are suggest that i stick with the current header?
well...as the proton stated on the paper is 125hp but some say is 125bhp. hp and bhp are not the same right?
the price of the sample header that i show u is quite expensive even thou it a second hand header...
 

Prince

Torque King
Points
242
From
Northampton, England
Car
BMW E36 318is Coupe
oo ok, so u are suggest that i stick with the current header?
well...as the proton stated on the paper is 125hp but some say is 125bhp. hp and bhp are not the same right?
the price of the sample header that i show u is quite expensive even thou it a second hand header...
If you can afford to then change the header. Are you running a de-cat pipe? BHP (Brake Horse Power) is the same as HP (Horse Power). HP is just a shortened version.

Don't forget there are other mods you can do to make your car quicker or feel better.
 

CPSycho

Wrench Pro
Points
26
From
Kuala Lumpur, Malaysia
Car
Proton Gen2 CPS
so the best setup for my exhaust header is 4-1? did u mean catalytic converter?
i've already took out the cat. in ur opinion, how much the hp will gain with this setup, i mean only the exhaust setup...is it true that hp is come from the engine power not from the wheel power?
 

Prince

Torque King
Points
242
From
Northampton, England
Car
BMW E36 318is Coupe
so the best setup for my exhaust header is 4-1? did u mean catalytic converter?
i've already took out the cat. in ur opinion, how much the hp will gain with this setup, i mean only the exhaust setup...is it true that hp is come from the engine power not from the wheel power?
Yes. A 4-1 header, a de-cat (basically a pipe instead of the catalytic converter) and an exhaust. I would have the exhaust 2 inches (no bigger than 2 1/4 inches) in diameter.

The power gain you'll see will be around 5-10bhp. You'll notice the difference in the throttle response.

BHP is measured both at the flywheel and the wheels. Most car manufacturers give the figure produced at the flywheel. On average a car loses around 17% of that power at the wheels.
 

CPSycho

Wrench Pro
Points
26
From
Kuala Lumpur, Malaysia
Car
Proton Gen2 CPS
ok...the 4-1 will be my setup...one more thing, is it ok if i wanna wrap my 4-1 header even thou the material is not from stainless steel?

17% decrease? darn...my cps engine cant defeats the mivec 1.6... :)

anyway, thanks a million for ur opinion and advises. i become from zero to half hero now...hihi...
 

Prince

Torque King
Points
242
From
Northampton, England
Car
BMW E36 318is Coupe
ok...the 4-1 will be my setup...one more thing, is it ok if i wanna wrap my 4-1 header even thou the material is not from stainless steel?

17% decrease? darn...my cps engine cant defeats the mivec 1.6... :)

anyway, thanks a million for ur opinion and advises. i become from zero to half hero now...hihi...
Heat wrapping is a good thing. It'll keep the temperature down. It will look a bit rubbish (kind of like a big bandage :lol:) but as the saying goes... Function over form.

The 17% loss can be helped by a decent set of tyres.

It's what forums are all about mate. Lots of people as crazy abouts cars as we are!

Get some pictures up as well mate.
 

CPSycho

Wrench Pro
Points
26
From
Kuala Lumpur, Malaysia
Car
Proton Gen2 CPS
even thou the material is mild steel? no cracking problem if wrap the header?

oo...the tires make the different for increasing the power that lost? this is really new to me. now im using dunlop D01 i think; with 195/55/15. what kind of decent tires that u suggesting?

well...i will do that. :)
 

Prince

Torque King
Points
242
From
Northampton, England
Car
BMW E36 318is Coupe
even thou the material is mild steel? no cracking problem if wrap the header?

oo...the tires make the different for increasing the power that lost? this is really new to me. now im using dunlop D01 i think; with 195/55/15. what kind of decent tires that u suggesting?

well...i will do that. :)
Can you not get a stainless steel one? Mild steel may not be worth the money to be honest.

The better the tyres, the more power you can put down. If they'll fit, you could try increasing the width slightly. I personally use Falken tyres for everyday use.

Pictures look good! What suspension setup are you running?
 

CPSycho

Wrench Pro
Points
26
From
Kuala Lumpur, Malaysia
Car
Proton Gen2 CPS
there is a lot of stainless steel header but they are too expensive...but i think i will sacrifice the money for the best.

the tires is very good, the gripping just so perfect. is hard to find the width's tires for 15" rims in my area, if i've found one they will be so mad expensive... :)

hehe...thanks bro. anyway, my setup for the suspension is stock absorber, a sport spring and 30mm front strut bar.

show ur car bro, really wanna see ur beemer.
 

Prince

Torque King
Points
242
From
Northampton, England
Car
BMW E36 318is Coupe
there is a lot of stainless steel header but they are too expensive...but i think i will sacrifice the money for the best.

the tires is very good, the gripping just so perfect. is hard to find the width's tires for 15" rims in my area, if i've found one they will be so mad expensive... :)

hehe...thanks bro. anyway, my setup for the suspension is stock absorber, a sport spring and 30mm front strut bar.

show ur car bro, really wanna see ur beemer.
I would save for the stainless steel mate. It'll be worth it! It should be T304 stainless steel as well. This is the quality stuff.

Maybe try out some 205 width tyres if you can?

Can you get coilovers? They'd make the handling better.
 

Prince

Torque King
Points
242
From
Northampton, England
Car
BMW E36 318is Coupe
Here's my Beemer:







It's nothing special at the moment. Stock 140bhp and in need of a new clutch. It'll be better by about May time. Keep your out for a project thread ;).

Basic plans are to make it look better, handle better and make it more powerful.

Here's my Honda Civic (which I'm currently selling):







This is only running around 110bhp but it was fun to drive and taught me a lot. It was lowered by 110mm. I had to go over speed bumps at 1mph! Time to move on with the BMW though.
 

CPSycho

Wrench Pro
Points
26
From
Kuala Lumpur, Malaysia
Car
Proton Gen2 CPS
I would save for the stainless steel mate. It'll be worth it! It should be T304 stainless steel as well. This is the quality stuff.

Maybe try out some 205 width tyres if you can?

Can you get coilovers? They'd make the handling better.
ok, i will do that... :)

i'll try my best...

coilovers? did u mean adjustable coilovers? i've already used adjustable almost 2 years and no doubt that adjustable make my car so tough enough to handle the road. sadly...the adjustable is start to make a squecking and cracking noise. one more thing, my wife and kid complaining about they always jumping left and right when i'm driving in a bumpy road:lol:. in malaysia especially in a city called kuala lumpur, the road is do darn suck...path hole here and there...:mad:
for the time been, the stock absorber and sport spring will be enough...:amuse:

both of cars are so darn cool...but honestly i'm really into ur civic:love:...is it single cam vtec? why u wanna sell that cool civic? if i in a northampton, i will buy ur civic:amuse:...what is the price of ur civic?
 

old-git

Moderator
Points
617
From
Essex
Car
Elan & Robin Hood
i really into for the high torques....:amuse:
This is, IMO, the important part of your question, as you are after more torque. If that is the case, then you need to use a 4:2:1.

BHP is for boasting in the pub or playing Top Trumps, lbs/ft is for acceleration.
 

Prince

Torque King
Points
242
From
Northampton, England
Car
BMW E36 318is Coupe
ok, i will do that... :)

i'll try my best...

coilovers? did u mean adjustable coilovers? i've already used adjustable almost 2 years and no doubt that adjustable make my car so tough enough to handle the road. sadly...the adjustable is start to make a squecking and cracking noise. one more thing, my wife and kid complaining about they always jumping left and right when i'm driving in a bumpy road:lol:. in malaysia especially in a city called kuala lumpur, the road is do darn suck...path hole here and there...:mad:
for the time been, the stock absorber and sport spring will be enough...:amuse:
Yeah adjustables. 2 years is a very short time for them to last. I would assume they were cheap, if not I'd be complaining.

both of cars are so darn cool...but honestly i'm really into ur civic:love:...is it single cam vtec? why u wanna sell that cool civic? if i in a northampton, i will buy ur civic:amuse:...what is the price of ur civic?
Thanks mate. It's actually non-vtec. The BMW is a much nicer car to be in. It's more powerful yet more refined. I bought the BMW almost a year ago as my Civic was taken off road for repairs. But I decided I prefered the BMW for everyday driving so the Civic will go to fund the project I'm doing on the Beemer.
 
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