C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Opening up my plenum how far??

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Old Jan 15, 2002 | 10:45 PM
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Gregory VanLare's Avatar
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Default Opening up my plenum how far??

I'm opening up my plenum at the entrance from the throttle body. I've ground out one side and I'm wondering if this is enough?? After I get it done, how do I get all of the filings out of the inside?
[IMG][/IMG] http://temp.corvetteforum.net/c4/my85vette//plen1.jpg [IMG][/IMG]
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Old Jan 15, 2002 | 11:16 PM
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Default Re: Opening up my plenum how far?? (Gregory VanLare)

Are you doing this with the plenum still in the car ?

If so, the proper way is to remove the plenum and port it. This way you can hose it down with water to clean it out.

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Old Jan 15, 2002 | 11:29 PM
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Default Re: Opening up my plenum how far?? (Vic'89)

His picture is of the plenum sitting on a bench/wood table top, so he is not doing it in the car.

Yes, just use a water hose and some nylon brushes to clean it all out.


[Modified by BBA, 10:29 PM 1/15/2002]
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Old Jan 16, 2002 | 12:50 AM
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Default Re: Opening up my plenum how far?? (Gregory VanLare)

Take out the taper of the openings so they go straight back.
Remove the bottom projections.
Take out as much material as far back as safe so as not to brake through the walls.

Do some work on the side openings to the runners. Pull the runners and clean them up too to further enhance air flow.

My method is on my site.

I used carb cleaner to clean up the inside and running water to flush out all filings and dust.
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