P&P Intake Manifold h22

[Ghetto_CB7]

Yay

Good to see no one is pissed, to me that is the worst way to end a thread.

Thanks for the clarification.

If I had more time, money, and knowledge I would also do ITB's

Good luck with the setup.

[turbo90accord]

With all the animosity in this thread I had to check to see if I was on cb7tuner or Honda-tech lol

[Ghetto_CB7]

With all the animosity in this thread I had to check to see if I was on cb7tuner or Honda-tech lol

[F22HB]

Polished = Shiny!

Sorry to interrupt but after reading everything and getting to this I just about rofled out of my chair.

[bcjammerx]

Imma waiting to see dyno's

[Ghetto_CB7]

Not this weekend

The dyno's will not be held this weekend. My boss is back in town and wants a data set done by Monday.

I will hopefully have time to completely finish the polishing and post updated pictures.

I am also trying to source another p13 to see if I can make my magic butterflies work. Although I now am thinking it may be a bad engine ground since I have a very strange wiring issue which I may post a video of tomorrow.

The wiring issue may even make you laugh, but it scared the hell out of me the first time it happened LOL

[bcjammerx]

The dyno's will not be held this weekend. My boss is back in town and wants a data set done by Monday.

I will hopefully have time to completely finish the polishing and post updated pictures.

I am also trying to source another p13 to see if I can make my magic butterflies work. Although I now am thinking it may be a bad engine ground since I have a very strange wiring issue which I may post a video of tomorrow.

The wiring issue may even make you laugh, but it scared the hell out of me the first time it happened LOL

your boss should understand this is more important than some silly data set

[Ghetto_CB7]

Tell that

Tell that to the people giving both my boss and me money LOL

[Ghetto_CB7]

Baseline

Well I did a baseline dyno today with the stock manifold and unfortunatly the polished one is not done so I will have to wait to do the after. I would have preferred to do both the same day to get a really good comparison, but that is how it goes.

Anyway here is the stock dyno with butterflies in but not working (always open) and a slight egr issue.
POS short ram intake
2.25 cat back
stock JDM header

My f22a1 made 114 hp and 127tq on this dyno

[93F22A6]

Looks pretty good. Now get the ported intake on there with a good header and 2.5inch exhaust.

[fatboy1185]

holy vtec jump

[Ghetto_CB7]

Yeah

Lets just say you can tell when it engages.

A good tune would do wonders for my 4000-5200 rpm range.

[turbo90accord]

I spoke with my engineering teacher today about the theory behind the rough intake walls near the head. The theory is that the rough walls near the injector cause drag on air passing over it. The roughnend area then creates small vortecies or disturbances in the air which circulate causing the small droplets of fuel to be better propagated through the air creating a more even mixture.

[Ghetto_CB7]

The last few inches

Well for those wondering.

The last few inches in carburated or fuel injected setups is still very important.

Pretty much everyone understands why you want to polish the upper part.
This is to increase streamline air flow and decrease turbulent air flow.

In the last few inches a rough surface on the edge creates turbulent flow at the edge of the runner.

Now that might sound like a bad thing, but it has a lot of advantages.

As the air first undergoes this turbulent flow on the edge it slows down and creates resistance leaving a smaller section for streamline flow. This creates an increased velocity in the streamline area which LOWERS pressure. The lower pressure creates even more turbulent flow by sucking up air near the edges toward the center.

By the time the air reaches the fuel being injected in this case it is nearly all turbulent flow. This helps mix the air and fuel better. (think of it as a blender with air and fuel in it.

If the fuel atomization wasn't enough it also causes a higher concentration or density of air at the end of the intake manifold.

Think of it like traffic. If you have three lanes moving smoothly (streamline flow) then later on down the highway you drop the speed limit from like 60 to 20. The other two lanes will obviously get more cars gong through them. Still later there is an on ramp that lets buses on the highway (fuel LOL) and eventually you get bumper to bumper traffic.

If you image the cars are air and buses are fuel you can see how this works.

Kindov a stupid real world analogy but it does the same thing.

regards.

[GreenMadness]

it seems you have a grasp on the fulids at work here, good to see. i was about to clarify the last few inches of the runner when tubro90 took care of it.

Just wanted to mention, that once you trip that flow (tripping occurs as mentioned above, when a lip or disturbance in the wall "trips" air into a turbulent tumble) the air is turbulent from there on out.

regardless, this wont change the fact that you need the last few inches of the manifold