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Offline Superc200

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Gc 190 cold air intake
« on: January 16, 2018, 06:35:45 PM »
I have an 09 mokai with the gc190 still in it. I know many of you have increased performance and decreased engine bay heat with cold air intakes for these motors. Anyone willing to share some pictures of your intake set up? My engine cover is the black abs. I was thinking of using the factory air box lid and plumbing a pipe that connected to a fitting going through the engine bay cover with some form of filter.
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Offline CC-CODER

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Re: Gc 190 cold air intake
« Reply #1 on: January 16, 2018, 08:39:16 PM »
« Last Edit: January 17, 2018, 01:27:19 AM by Painlesstom »
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Offline CC-CODER

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Re: Gc 190 cold air intake
« Reply #2 on: January 16, 2018, 10:31:45 PM »
« Last Edit: January 17, 2018, 01:27:08 AM by Painlesstom »
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Offline Painlesstom

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Re: Gc 190 cold air intake
« Reply #3 on: January 17, 2018, 01:26:55 AM »
None of those apply to him, Chuck. He has the Honda model, nothing like what you have.  ;)

This is the cold air method I used back when I still had the Honda. Worked very well.  \./8 http://www.improvingyourmokai.com/index.php/topic,87.msg386.html#msg386

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Offline The Man

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Re: Gc 190 cold air intake
« Reply #4 on: January 17, 2018, 01:53:27 AM »
Quote from: Superc200 on January 16, 2018, 06:35:45 PM
I have an 09 mokai with the gc190 still in it. I know many of you have increased performance and decreased engine bay heat with cold air intakes for these motors. Anyone willing to share some pictures of your intake set up? My engine cover is the black abs. I was thinking of using the factory air box lid and plumbing a pipe that connected to a fitting going through the engine bay cover with some form of filter.

Welcome to the group! I would save up and buy Tom's Subaru conversion. Tom can advise the price and availability.
« Last Edit: January 17, 2018, 01:56:46 AM by The Man »
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Offline Hillbilly

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Re: Gc 190 cold air intake
« Reply #5 on: January 17, 2018, 08:01:41 AM »
Hello Superc,

Your question brings back pleasant memories of the GC190.  Search this site for" GC190 performance ideas." Cold air intake is easy and both improves performance significantly and solves hot start problem for the GC190.
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Offline CC-CODER

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Re: Gc 190 cold air intake
« Reply #6 on: January 17, 2018, 12:10:09 PM »
Quote from: Painlesstom on January 17, 2018, 01:26:55 AM
None of those apply to him, Chuck. He has the Honda model, nothing like what you have.  ;)

This is the cold air method I used back when I still had the Honda. Worked very well.  \./8 http://www.improvingyourmokai.com/index.php/topic,87.msg386.html#msg386
I figured as much. Knew the experts would chime in too. Lol

Do you still have this setup and what engine and Mokai?

https://youtu.be/emwxTSetMDw
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Offline CC-CODER

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Re: Gc 190 cold air intake
« Reply #7 on: January 17, 2018, 01:47:44 PM »

I see Honda on the engine after watching it again. Pretty cool to see the changes from 2012 that you've made, especially the covers and Subaru upgrades.


« Last Edit: January 17, 2018, 02:05:47 PM by Painlesstom »
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Offline Painlesstom

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Re: Gc 190 cold air intake
« Reply #8 on: January 17, 2018, 02:08:56 PM »
Blast from the past there. Things have certainly come a long way since then. That was a Honda GX200, the first Electric start engine I used to convert my 2003. Nothing in common with the GC190 they came with back then.  \./8
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Offline Superc200

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Re: Gc 190 cold air intake
« Reply #9 on: January 17, 2018, 07:38:53 PM »
Tom, thanks for that pic. What I have in mind is very similar to what you did,what is the piece that is attached to/ sticking out of the engine cover? Is there any issue with water getting in? Obviously some of that would be conditional to what the water was like. I do tend to run in some choppy water. This will likely be my last summer with the honda before I cough up the money for the ex21 swap!
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Offline Painlesstom

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Re: Gc 190 cold air intake
« Reply #10 on: January 17, 2018, 10:43:19 PM »
Glad to help. It was just some 2" PVC pipe notched at the top like a castle, then a larger PVC cap glued on top to keep water out. Cutting out another vent hole to let the compartment breathe really makes a difference too. Ideally right above the engine since that area will get cut out anyhow when we do the Subaru conversion. You can flip the scoop around so it's facing rearward, reusing the same 4 holes and then drill the back one once it's bolted back on. Leaves plenty of room to cut the vent.
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Offline Relichunter

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Re: Gc 190 cold air intake
« Reply #11 on: June 22, 2020, 07:54:00 PM »
I borrowed (Ok, Ok, I stole it ;D) an idea from Painlesstom that he had posted some time back regarding a Fresh Air Intake for the old Honda engine. I had noticed when operating at top speed, after a few minutes my speed would drop off by 1~1/2 mph. I assumed rightly or wrongly that the air in the engine compartment got too hot and a source of cool fresh air directly into the carburetor might solve that problem. I picked up a couple of things at the local HW store; a length of 2” PVC pipe, a 2” PVC flexible coupling, and a 2” 90-Degree PVC Flexible Elbow Coupling.

I removed the engine air filter top cover and filter. Using a razor knife, I trimmed the flexible coupling to fit the inside contour of the bottom half of the air filter enclosure. I put a couple of drops of super glue on the top of the coupling then carefully placed the engine cover back on in place until the super glue hardened. When I removed the engine cover, the coupling was lightly glued to the cover and I was able to scribe a circle on the downside of the engine cover through the inside of the flexible coupling. I pulled the coupling loose then following the scribed line, cut a ~2” hole through the engine cover so that a short length of the 2” PVC pipe could go through it.

I then repositioned the previously trimmed flexible coupling back onto the bottom half of the air filter enclosure, reinstalled the engine cover, then pushed a short length of PVC pipe down into the flexible coupling on the carburetor. With a little epoxy I permanently glued the PVC pipe to the engine cover to prevent it from turning thus keeping the trimmed coupling always aligned with the contour of the bottom of the air intake housing. Next I positioned the 90-degree flexible elbow over top of the PVC pipe and tightened all the SS clamps.

It worked great. I no longer had any speed drops while running at full throttle. In a heavy rain, I can turn the top 90-degee elbow away from facing the front. I suspect a larger fresh air intake would help keep the engine cooler while still providing cool fresh air to the engine now that I see what Painlesstom has been doing.

Nonetheless, thank you Painlesstom for another great idea. \./8

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