intake manifold

[hondaxpurt]

hey how much will an aftermarket intake manifold increase power over stock?

[smote]

25-30 whp easy

[2.0 under pressure]

25-30 whp easy

or more, especially when it's boosted

[BABY J]

There are better places to spend money I think.

[mocha latte cupcake]

single cam? depending on alot of things but i don't do hondas... but i would see unboosted 7-15

[allmotoronly]

25-30 whp easy

It depends on the application. a N/A D series will probably see gains of around 7-10whp (built engines may see more). a Boosted D series may see up to 15whp gain. B series engines (depending on model) may see as much as 15whp gain on a n/a engine, and about 20-25whp on a boosted engine. I have never seen a street driven 4 cyl honda make 25-30whp with just a intake manifold swap. I'm not saying it hasn't happened or cant be done, 30whp is just not a very realistic goal for just a intake manifold, especially if you don't have larger cams, higher compression pistons, Forced induction or anything else to warrant the need for much more air flow. Unless you are flowing about 25-30% more air than stock, you really don't need a larger intake manifold, unless your engine has a dual stage intake manifold (GSR, H series engines, some F series engines...)

a B18C1 will see a larger increase in hp over stock than a B16A or B18C5, because the GSR engine has a 2 stage intake manifold. B16A and B18C5 have a single stage manifold (which is what you are putting on a B18C1 when you do the swap.) A GSR may see a 15-20whp gain depending on the other supporting mods.

[all-mota]

It depends on the application. a N/A D series will probably see gains of around 7-10whp (built engines may see more). a Boosted D series may see up to 15whp gain. B series engines (depending on model) may see as much as 15whp gain on a n/a engine, and about 20-25whp on a boosted engine. I have never seen a street driven 4 cyl honda make 25-30whp with just a intake manifold swap. I'm not saying it hasn't happened or cant be done, 30whp is just not a very realistic goal for just a intake manifold, especially if you don't have larger cams, higher compression pistons, Forced induction or anything else to warrant the need for much more air flow. Unless you are flowing about 25-30% more air than stock, you really don't need a larger intake manifold, unless your engine has a dual stage intake manifold (GSR, H series engines, some F series engines...)

a B18C1 will see a larger increase in hp over stock than a B16A or B18C5, because the GSR engine has a 2 stage intake manifold. B16A and B18C5 have a single stage manifold (which is what you are putting on a B18C1 when you do the swap.) A GSR may see a 15-20whp gain depending on the other supporting mods.

i think you missed smotes sacasm

and to be honest every engine is different and isn't going to benefit unless the engine is moving enough air to actually use the extra plentum volume and runner length in most cases.

[smote]

it was a n00b reply for a n00b question

[Vteckidd]

hey how much will an aftermarket intake manifold increase power over stock?

on a SOHC engine, maybe 3-4whp if tuned.

Intake manifold is only part of the equation, you need to let us know the rest of your setup.

if its a stock motor, youll almost gain nothing, you are better off spending money on ...............a turbo

NA SOHCs never work out

[2.0 under pressure]

I gained 33 whp from a 68 mm throttle body and an edlebrock victor x, I hit a wall in tuning and the cause was the throttle body. This was on a very well built setup (boosted).

[silverEJ8]

" NA SOHCs never work out "

I think your previous statement is a little under researched.

N/A Built Sohc's work when you take the time to do them right. Just like building any __series motor you have to Tune them. If done right you can have a reliable 150whp D16. That's as good as some stock GSR's.

[Tech5]

x2

on a SOHC engine, maybe 3-4whp if tuned.

Intake manifold is only part of the equation, you need to let us know the rest of your setup.

if its a stock motor, youll almost gain nothing, you are better off spending money on ...............a turbo

NA SOHCs never work out

[KurtzBoom]

say about more than 50 whp



Kurtz
Adamtube.com

[patrick4588]

" NA SOHCs never work out "

I think your previous statement is a little under researched.

N/A Built Sohc's work when you take the time to do them right. Just like building any __series motor you have to Tune them. If done right you can have a reliable 150whp D16. That's as good as some stock GSR's.

or turbo it and make 200whp for less money