66mm or 68mm Throttle body?

[Luke Accord]

Hey all been looking around for a 66mm skunk2 throttle body for a h22a but not having any luck would there be any difference in performance in using a 68mm?

[94vtirozguy]

The H22 likes air. 68mm would be ideal, you could even go larger depending on the mods you are doing.

Make sure you get it ported to your IM otherwise there is not much use.

[WPN.22R]

send me a pm..

I can get it for you and send it down.

[040501912]

The H22 likes air. 68mm would be ideal, you could even go larger depending on the mods you are doing.

Make sure you get it ported to your IM otherwise there is not much use.


every car loves Air LOL !! not air no power :p basic rules of combustion hahah
make sure you upgrade injectors to feel the power :thumbsup:

[barefootbonzai]

make sure you upgrade injectors to feel the power :thumbsup:

i think you should stop giving random advice.

[040501912]

i think you should stop giving random advice.

ROFL ;)

[WPN.22R]

make sure you upgrade injectors to feel the power :thumbsup:

Is that a serious comment? :zip: LOL

[fatboyz39]

The H22 likes air. 68mm would be ideal, you could even go larger depending on the mods you are doing.

Make sure you get it ported to your IM otherwise there is not much use.

:thumbsup::thumbsup::thumbsup::thumbsup: do what he says to benefit the bigger throttle body. Injectors not needed.

+rep point for you.

[dsp26]

every car loves Air LOL !! not air no power :p basic rules of combustion hahah
make sure you upgrade injectors to feel the power :thumbsup:

i beg to differ on the every car bit... this is why i was so confused switching from a Nissan SR20 to a Honda B16.... there are so many dyno proven gains from intake modifcations on the honda BUT i will guarantee you there is little to no benefit in TB/plenum/runner design on an sr20 until at least a certain power output.

i don't agree with the injectors either

[timske]

i beg to differ on the every car bit... this is why i was so confused switching from a Nissan SR20 to a Honda B16.... there are so many dyno proven gains from intake modifcations on the honda BUT i will guarantee you there is little to no benefit in TB/plenum/runner design on an sr20 until at least a certain power output.

i don't agree with the injectors either

I got a custom inlet manifold made up with a larger 70mm tb and i went from 96kw atws to 110kw atws. So there is some gain to be had on sr20's. Just not as much as the honda guys.

[Luke Accord]

The engine is going to have stage 1 skunk2 cams, springs and retainers, custom CAI, e-manage, Headers 2.5 inch exhaust.

[DR HONDA]

The 68mm will be a little bit of an issue on a stock manifold as you will run into the idle air valve port when opening the manifold mouth to suit the 68mm throttle body. You might have to invest in a skunk manifold as well.

[Luke Accord]

The 68mm will be a little bit of an issue on a stock manifold as you will run into the idle air valve port when opening the manifold mouth to suit the 68mm throttle body. You might have to invest in a skunk manifold as well.

Yeah your right measured on a stock manifold to port a 68mm TB and it hits the idle air valve port so will probably have to be a 66mm do you think its a necessary upgrade considering the mods?

[94vtirozguy]

go the skunk IM i think it can be bored out to 74mm or so.

why buy 66 and then buy larger later on, do it right the first time.

[Luke Accord]

I've been told by many people that the skunk2 IM is no good. So i'm trying to avoid the need for getting one if possible.

[eg92b16a]

Who says the Skunk2 IM is no good.
Compared to what????
I have a skunk2 IM on my B16A and have only praise for it. Noticeable difference in midrange and top end compared to stock IM.

The S2 manifolds are designed and tested to work with their cams. How can they not be better than a stock IM if you have mods.

[Luke Accord]

Who says the Skunk2 IM is no good.
Compared to what????
I have a skunk2 IM on my B16A and have only praise for it. Noticeable difference in midrange and top end compared to stock IM.

The S2 manifolds are designed and tested to work with their cams. How can they not be better than a stock IM if you have mods.

Lots of people.
Compared to stock.
On the h22a engine = not better than stock
On other engines I haven't heard anything bad, although i haven't looked.

[94vtirozguy]

Now those people who told you it was so bad, did they have one on their car ? or are the all e-mechanics as in my brother heard, that my sisters boyfriends uncles sister inlaw nephew that they were bad.

I know 3 people with the skunk on their cars, and all 3 made gains.

[fatboyz39]

Have anyone thought of Euro-R manifolds? The US speaks highly of them and shits over the shunk 2 manifolds.

[Dylanamus]

In "theory" a 68mm throttle body on a stock h22a (ie stock manifold and stock head etc) would increase the flow at the cost of velocity.. given that the extra air flow wouldn't be required to achieve the ideal A/F mixture, the benefits of flow would be outweighed by the loss of velocity... that's just the theory, or am I wrong?

[94vtirozguy]

Have anyone thought of Euro-R manifolds? The US speaks highly of them and shits over the shunk 2 manifolds.

It was proven very recently on a stock engine the Skunk IM outperformed it.

There will be another test with built motors.

All the work needed to get the euro to work on the H22, as compared to the skunk off the shelf...... the skunk wins hands down.

[040501912]

why dont just take the manifold! and bore, port & Polish ?? you get much better flow out of them.

S2 cast manifold are not polished.. so.. might think of do your won stock manifold?

[Luke Accord]

Now those people who told you it was so bad, did they have one on their car ? or are the all e-mechanics as in my brother heard, that my sisters boyfriends uncles sister inlaw nephew that they were bad.

I know 3 people with the skunk on their cars, and all 3 made gains.

The main person who told me to steer away from them is a skunk2 dealer in aus. So i'm pretty sure they have a decent knowledge on them.

Also these 3 people are the on a h22a engine?.
Also was that the only part of the engine modified at that time?.
As in dynoed before the change and after without any other modfications elsewhere?

[Luke Accord]

why dont just take the manifold! and bore, port & Polish ?? you get much better flow out of them.

S2 cast manifold are not polished.. so.. might think of do your won stock manifold?

Thats what i've been told by a number of people and thats what i'm considering doing. Thanks for your post.

[hondavti25]

maybe another one other then skunk2? http://www.horsepowerfreaks.com/price/Honda/Civic/performance/Intakes/Intake_Manifolds

[94vtirozguy]

1) yes
2) yes
3) yes and both were tuned to their full potential.

here is the URL

http://www.honda-tech.com/zerothread?id=1993840&page=1

[040501912]

how but if you fussed about manifolds, get ur self set of trumpets... and you will be changing your mine at the end of it ... ;)
with quads trothle of coz

[Luke Accord]

1) yes
2) yes
3) yes and both were tuned to their full potential.

here is the URL

http://www.honda-tech.com/zerothread?id=1993840&page=1

Ok I've been reading through the thread on honda tech and from what I've gathered correct me if i'm wrong.
1)The stock manifold wasn't portmatched to the 70mm TB (so no gain)
2)The skunk2 comes bored to 66mm so it has a 6mm bigger opening than stock
3)The 5.51hp gain required a 70mm Tb with a 6mm bigger opening then stock on the manifold.
4)I would have liked to see a dyno for the stock manifold port matched to a 70mm or at least to 66mm to match the skunk2.
Thanks for the link it was a good read.
Cheers.

[94vtirozguy]

stock can't and nor can the euro unless you weld on a new flange to enable you to put on a larger TB

The skunk can easily take a large TB right out of box, and simply be ported to the new TB

[Luke Accord]

I was under the impression that a skunk2 TB just bolts onto the stock manifold and you could just port the manifold to suit the size of the throttle body.
You seem to be pretty informed when it comes to the h22a. Do you have an opinion on the fujitsubo headers for the h22a?
I'm looking for a new set of headers so any opinion would be helpful.
Cheers.

[94vtirozguy]

i didnt use the skunk TB on the skunk IM as there are better quality TB for cheaper.

If you want the most power for h22 headers SMSP, Hytech and RMF are the best on the market currently.

[Luke Accord]

i didnt use the skunk TB on the skunk IM as there are better quality TB for cheaper.

If you want the most power for h22 headers SMSP, Hytech and RMF are the best on the market currently.

What throttle body did you use?
Have you heard anything on the fujitsubo?
Thanks.

[Dylanamus]

Even if you can port match the manifold to the 68mm TB, you are probably crossing over the line where extra flow is actually beneficial. You would need to have a fair bit of headwork for 68mm to be justifiable on an N/A otherwise stock engine. Plus isn't the flow through the h22a head pretty average anyway?

[94vtirozguy]

the h22 actually flows pretty good from the factory. It suffers more from not getting enough air. Thats why basic bolt ons can give you decent gains and a good tune

68mm is ok and you will feel the difference with TB and IM ported on your h22. If you are going more heavy mods then say even 70mm or even quads i would be looking at.

[Topendwarrior]

i reckon original size is best, if bigger brings more power gain, Honda Engineers could have done that at the first place. It will vary the power band.
i have done this mod on my EH, using DC throttle body, the result is more torque at low end but don't scream as hard at high. This is a personal experience.