imported_Hybridtheory

what kinda headers would you guys recommend for both quality & performance??


90 CRX ( B16 )

EK7_DriftMania

The best setup is the 4 into 1 (one peice header), it must not be too big. It does not matter who makes it, as long as it is a 4-1 style.

EK7_DriftMania

Sorry forgot to mention that, if you want quality and looks, then ask for a chrome headers - costs more. If looks does not matter to you, then ceramic who work just fine.

ryuujin

IMO if you're lookin for a header, perhaps plan out what you might be doing in the future to the headwork of the B16.

Anyways, if ya have no intentions of upgrading the head, I'd suggest getting a 4-2-1 to minimize the loss of tq. though minimal every bit counts IMO

If ya get a 4-1 design it'll be excellent in the vtec range and if you feel as if the tq has dropped pick up a Spoon ventuli plate to try and gain it back some, I've heard nothing but good reviews on the ventuli plate HTH

imported_Hybridtheory

where could i get the spoon plate..... and for how much?

i was thinking of the dc sports stainless headers?

ryuujin

dc stainless headers are good, and you could get the Spoon plate at either Rev, Speedstars or online...as far as Toronto shops, Rev and Speedstars are the only places that I'm somewhat more familiar with what they can get

b16ferio

does the venturi plate really works! what's the benefit?

ryuujin

yeah apparently it works as I've spoken to a couple people online who actually have it, I'm not certain on how exactly it works, but it's supposed to funnel the air (to increase velocity) and smoothen out the flow of the incoming air into the head. The purpose of it is to re-gain I guess the mid-range power that's lost when installing more free flowing add ons like the I/H/E combo.

perhaps someone else can give a more detailed explanation, meanwhile here's the extract from Spoon Sports website

"Racing engines are machined with extreme precision and feature filled in intake ports. This is done to make use of the ventuli effect which is a fundamental of fluid mechanics. Specifically, by smoothing a portion of the intake port and making it narrower, it is possible to increase the speed of the air fuel mixture. By simply inserting this component between the cylinder head and the intake manifold, it is possible to obtain the optimum port shape for the above mentioned ventuli effect. When the speed of the air fuel mixture is increased this way, the efficiency of combustion inside the engine is improved and power increases accordingly."

EK7_DriftMania

Just in case nobody is reading my post or does not understand what I am saying - I apologise. So, let me put in prespective and restate myself.

- as mentioned in the qoute "..smoothing a portion of the intake port and making it narrower, it is possible to increase the speed of the air fuel mixture..." I said, that in my post, basically, having the ports more narrow, you can speed up the air flow, which causes a faster and more accurate air and fuel mixture. Don't beleive me? Try blowing through a tube and them cover the tube half way, you can difinitely feel the defference in air speed. The engine works the same way, the faster you get the air in, the better power that it will produce. Just remember, fuel and spark does not light up without air, that is why you cannot light a fire in space, rocket fuel is mixed with oxygen. However, too narrow will cause a decrease of hp in the higher rpm.

- In terms of the headers, you can choose the gauges (size of the ports) for some companies, but those can be expansive, and you are only looking at max 2-4hp. The 4-2-1 set up is the same as the stock Si or SIR, but not the same for EX.

PULOVR

Civics only require ONE header, not headers.