Hey guys got a EF Plenum of a mate that fkd his ef. im gonna polish it and make it look nice then put it on my car.

Any tips would be good as i dont know how to polish them up or what to use

I took it apart today and oh dear iv neva seen inside one of these but im pretty sure its not supposed to look like this. i gave the first intake a little clean and its almost coming ok also cleaned 1 side of the bottom piece

 

 

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File comment: i bit cleaned up IMG_0115.JPG [ 99.49 KiB | Viewed 181 times ]

File comment: injectors covered in muck IMG_0112.JPG [ 252.95 KiB | Viewed 164 times ]

File comment: ewwwww im pretty sure this was not supposed to be a oil intake lol IMG_0110.JPG [ 247.12 KiB | Viewed 148 times ]

File comment: hmmm a bit yuck tbh IMG_0109.JPG [ 238.25 KiB | Viewed 177 times ]

File comment: when i got it IMG_0108.JPG [ 192.67 KiB | Viewed 179 times ]

Intake plenum can have a bit of oil on the bottom half of the intake plenum...however not too sure if it's meant to bake on like that on the upper half .

I think the fastest way to get it shiny would be via a Dremel (or similar) with a lot of attachments. To get into the smaller spaces, you'll need to do it the old fashion way unfortunately.

If you don't have a Dremel...it will take a lot of elbow grease and sand paper to get it smooth and sexy. I gave up after using 80grit on one of the humps and saw the massive task ahead...if you get it done, brownie points to you .

yeah i dont plan to rush it i will just do a little bit each time i got outside for a smoke and so on.

and when the missus gives me the s**t ill prob go out there for a Hr or so

Since i got it apart do you think there is anything that would be worth changing on it?

the manifolds get oil inside through the pcv and the top half gets stained from the oil and oil vapour that goes into the throttle body from the rocker cover breather...
so its pretty normal.. but as the engines get more worn the oil vapour gets worse.

Nothing much you can change really...best is to replace the gasket between the 2 halves. Check the actuator that controls the butterflies to make sure it isn't sticky. Also you can check the butterflies themselves to see if they close properly.

Nothing much else you can really check.

i want to get a good set of injectors any ideas on what are decent and not ridicules on price

I've just done a lot of work on my car in this area. Fortunately for me, I managed to buy someone else's project manifold, which had been ported (lower half only) and smoothed somewhat inside on both halves. I got it as an unfinished project and just gave it a tidy-up - most of the work had been done with a die grinder. I gave it a clean in a hot caustic wash (Robowash machine) and then it was ready to paint. I painted it because I don't have the time or patience to polish the thing. I used heatproof paint over engine primer.
I also fitted a catch can to reduce the amount of oily crap that accumulates in there. Most of it comes from the PCV valve which feeds directly into the manifold, just below the throttle body. Some oil may have come from the air filter, a lightly-oiled K&N panel I was running until recently. The catch can is plumbed between PCV and manifold, using fuel hose and mounted between the washer bottle and the manifold.
Regarding injection, what I found is that fuel injectors are rated in lb/hr at a set fuel pressure; if you raise the pressure you can increase the flow rate. In my EF with 19lb/hr stock injectors, I fitted standard 21lb/hr AU injectors and a 350kPa regulator to give me just over 24lb/hr flow rate, and saved the expense of going out and getting 24lb injectors off the shelf. The added bonus is the improved four-point spray pattern offered by AU injectors over the stock ones with their single-jet setup.

BTW, shop around. I managed to do the complete injection upgrade, ported manifold and catch can setup for a total $150... bargain!!!

Ported manifold



Catch can location


Finished injection and manifold upgrade

yeah i will defiantly go the Au injectors after looking around oil catch seems like a good idea to might look into it.

well i can see that this will take some time.

about 1hr of sanding has got me about 1/6th of 1 of the 6.

Still should look good when im done. out of sand paper tho so ill have to go get some tomorrow.

i only had p240 and i rekon its to fine my try on 80 and see how that goes

 

 

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80 grit will pull all the crap off pretty quick. When I was doing my mags I stayed with 80 grit until I was through all the pits and rubbish then pregressively worked down to 400 with some water. After that was hours and hours of Autosol...

should i use water with the 80 or just dry sand it until the s**t is off

I used water all the time, stops your fingers getting hot for starters

Depends if your using wet n dry or just plain old dry sandpaper.
I use wet and dry and i find that if i keep rinsing the paper you can make it stretch, which helps when your gonna end up using at least $50 just in paper.

yeah i found some 60grit but it was not water proof so it fell apart in about 2secs but ill get some water proof 80grit tomorrow or i might just buy a dremel

Sand with wet and dry. Helps with keeping it cool (for your sake, not the manifold) and it also removes the excess metal as you go allowing better sanding. Also much easier with wet and dry IMO than dry sanding.