New Mods - CAI and Oil Catch can - Honda Prelude Forum

racinghonda · 11-13-2005, 03:30 AM

Well I have finally finish the job, all in all it took me about 3 hrs. I got a Simota CAI pipe (75mm or 3") and an Apexi Power Intake filter (500-A026).

First step was to remove the drivers side wheel guard lining.

A look at where the intake pod needs to go. This is the stock resonator.

This is where the stock airbox used to be, I have now fed the CAI pipe through and hooked up the filter. I had to enlarge the hole because the 75mm CAI pipe was too big. I used metal cutters, then hammerd it out and filled down the edges. You can see that I installed it so the Apexi sign is visible.

Inside the wheel well

Filter visible from outside with the indicator and corner light removed.

Then I started the next phase of the project and installed the catch can into the space newly vacated by the airbox.

I then used a dremmel and cut out a hole in the corner lense cover and sprayed it black

The view from front on

Driving Impression:
The sound!!! :grin: In low cam it sounds great, deep and growly. Then when it crosses over to hi-cam the barks and just sounds manic. Unbelievable. Just an eargasm. And it feels like it pulls harder between 7000 and 8000rpm. And idle you can hear it hissing.

L-U-R-C-H · 11-13-2005, 07:14 AM

Nice. That a JDM Lude?

Rudaluda · 11-13-2005, 09:28 AM

what did you do with that diaphragm looking thing?

racinghonda · 11-13-2005, 02:24 PM

I removed it. I also removed a small plastic box which was sitting next to the battery. It had a vacum hose running to it from the intake manifold and another running to the resonator. I guess that is the vacum tank.

The car is an Australian market model (VTi-R).

MidNiteMysT · 11-13-2005, 07:05 PM

i was always thinking of installing a catch can but i was just never sure if i needed it or it made any real benifit. thats a really long hose going to and from your catch can.

racinghonda · 11-13-2005, 07:18 PM

Quote:

Originally Posted by MidNiteMysT

thats a really long hose going to and from your catch can.

I know, tell me about it... Unfortunately, I couldn't find any other place to put it. I can't see why that particular hose length would pose a problem. The system is sealed anyway, as long as the blow by makes its way into the plenum then it should be ok. And the pressure should make sure the oil vapour that seperates gets into the tank?

I checked this morning after a 35km (21 mile) drive and can see a very slight trace of oil where the hose connects to the PCV.

MidNiteMysT · 11-13-2005, 07:49 PM

i remember once someone putting it a lot closer on one of these threads. somewhere in the top right corner.

racinghonda · 11-13-2005, 11:59 PM

Quote:

Originally Posted by MidNiteMysT

i remember once someone putting it a lot closer on one of these threads. somewhere in the top right corner.

Yep I have seen those photos, but that's with the Left Hand Drive models where the brake master cylinder is on the other side. I have ABS on one side and brake master cylinder on the other.

Have a look at this photos, the lower hose is the feed from the PCV valve. I have only done 65kms since the install, and already you can see an appreciable amount of oil in the hose. Over the course of a few thousand miles . . . . and us H22a owners wonder where our oil goes.

MidNiteMysT · 11-14-2005, 12:22 AM

damn, thats pretty significant.
make me wonder if i should get this myself.
so what happens if you didnt have the catch can? the oil would be go into the intake manifold right? that would be bad for intake and otherwise disappear resulting in less oil in the engine? i thought the catch can was for something else, like it would catch the heavy hydrocarbons or something like that. maybe thats a different catch can tho.

MidNiteMysT · 11-14-2005, 12:24 AM

btw, whats those blue sock things on the resevoirs do?

AliKhan · 11-14-2005, 01:15 AM

Keep fluids that may leak from making a mess in the engine bay?
That's pretty much the most logical reason for those that I can think of, besides cosmetics.

racinghonda · 11-14-2005, 01:41 AM

Quote:

Originally Posted by MidNiteMysT

btw, whats those blue sock things on the resevoirs do?

They're for soaking up overflow and sweating from the reservoirs during hard driving. They work, after a hard drive where the brakes are punished, the socks are wet with brake fluid.

They're made by Spoon Sports

G_Loc · 11-14-2005, 09:15 AM

Nice!

Those braided lines going to the catch can will start collapsing in on themselves after a few months of driving.

Ludster · 11-14-2005, 10:42 AM

why is that? heat?

yield · 11-14-2005, 11:03 AM

Here's where I threw mine:

Those lines do look pretty weak but on the up side you should be able to tell easily if and where they collapse.

G_Loc · 11-14-2005, 11:09 AM

Quote:

Originally Posted by Ludster

why is that? heat?

The heat and the oil will soften them up to the point where the vacuum will cause them to collapse

petern101 · 11-14-2005, 12:24 PM

judging by the second pic from yield, doesn't seem to hard to install, maybe i should think about getting one

MidNiteMysT · 11-14-2005, 01:21 PM

so why is that hose connected to the intake manifold. like whats the purpose? maybe then i can understand why it doesnt matter how long the lines are.

so this thing will prevent oil getting sucked up into the intake to stop carbon and oil sludge build up in the intake?

racinghonda · 11-14-2005, 01:55 PM

Quote:

Originally Posted by MidNiteMysT

so why is that hose connected to the intake manifold. like whats the purpose? maybe then i can understand why it doesnt matter how long the lines are.

so this thing will prevent oil getting sucked up into the intake to stop carbon and oil sludge build up in the intake?

The line goes back to the intake manifold because that is where the PCV feed is meant to go. The catch can just sits in between the two. As for the over all purpose of the line going to the IM, its for emission control. The PCV valve vents the blow by gasses which contain hydrocarbons and other pollutants back into the intake manifold so that they can be burned through combustion. But due to crank case pressure and oil splashing around under the rocker cover, some oil invariably gets out through the PCV and sucked into the intake manifold, which causes the carbon buildup.

I thought about puting it in the same place as Yield but my catch can is quite tall and the gear shift linkage is below that point, I didn't want it to hit. I spoke to my tuner about the hose length he said its ok and where I have put it is a good spot because it makes sure that the catch can is cooler than the engine which will help the vapours condense and seperate.

And yes, the hose has started to collapse. I am getting some proper reinforced hose which is the same colour as my silicone hose connectors and Spoon socks. And once I add some Magnecore Electrosport leads which are blue also, I will have a nice colour theme going under there.

95_5speed · 11-14-2005, 04:03 PM

when i read the topic title, i knew youd put it there, I recently installed a Greddy catch on my car and thats where I located it as well, I took it back off though in favor of stock intake.

looks good, now go paint the other outer reflector black so it matches the passenger side one! ~ Brett

DIRT RACER · 05-31-2008, 12:32 AM

i found this by searching

wouldn't you also have to run the "blue" hose that goes from the valve cover to the intake through the catch can