Jump to content
SAU Community

Diy; The Hood Hack.


Recommended Posts

Taken from s2ki.com forums. (Yes, there are Honda pictures in here)

*disclaimer* I take no responsibility if you mess up!

I wanted a vented hood for three reasons;

1. To let heat (from header, engine, & radiator) escape from engine bay

2. To get cooler air into intake

3. To use the low pressure area above the hood to help extract air from under the front of the car thereby increasing velocity under the splitter and floor of the nose which should increase downforce.

Why not buy a carbon fiber vented hood? The affordable knock-off carbon hoods are heavier and less stiff than the stock aluminum hood. I believe the stock hood weighs 14 pounds. The high quality "authentic" hoods (cwest, mugen etc...) cost a bundle and still need to be painted unless you are going for the carbon look. Some if not all composite hoods require hood pins for high speed use. Oh yeah, and I'm cheap. I planned on venting both sides but ran out of time and decided I like the look of just one side. Still debating.

Here's my solution:


How to build your own:

Please use appropriate safety equipment and don't screw up.

Yes, you are about to cut holes in a perfectly good hood so be prepared.

Remove the hood and the hood liner and support it upside down on some padded saw horses.

Make templates by laying paper over each support hole you plan to cut and trace the edge (use the pencil rubbing technique). Use the templates to cut out some perforated aluminum (clean and paint the both sides of the aluminum). http://www.mcmaster.com/


Use a 3/8" spacer against the hood support edges to draw the hole shape. I left a 3/8" lip for mounting purposes.

Using a UniBit, drill a hole in each corner.


Using an air saw, cut out the shape from the under side - leave a small gap to finish off with sanding.

Use a sanding drum on a die grinder to smooth to shape. I tried using a sandpaper wheel on an angle grinder but it gets too hot and the paints starts to peel back.


Once the shape is close, flip the hood over and apply masking tape on the top side all around the new openings.

Use wet dry sandpaper to smooth the cut and feather the paint. The masking tape is there so if you slip with the sandpaper, you won't scratch up your hood.


Lay 3M double stick tape used for moldings/body work on your 3/8" lip and trim with a razor to fit just inside the cut out (find it at automotive body shops).

Use a fine paint brush and carefully paint the exposed edge with factory touch up paint.

Install perforated aluminum and your done. I used some small sheet metal clips to hold the perforated aluminum in place just in case the double stick tape failed due to engine heat but I ran a full track day without them and everything was fine.



Edited by 403_r32
Link to comment
Share on other sites

that looks tough as, would look way better with bost sides done but then agian may be too busy, ohh btw if your in melb and ever need any geniune parts for your s2000 pm me, i work in spare parts at a Honda dealer, i dont mind helping out a fellow member, even if oyur not in melb and think your getting ripped pm me ill let you know.



Link to comment
Share on other sites

Well, I guess you'd really have to have steady hands if you dont want to respray the bonnet, nevertheless make a mistake! Getting a straight cut is probably the most difficult part. Sanding/feathering down the edges may be a bit tedious, but as long as you take off a fairly even amount and the edge retains an even bevel, the touch up paint would suffice.

The s2k hood was done as I said, just touched up around the edges, and as far as I'm concerned it looks pretty damn good :P As long as you have a straight cut to begin with, and have it all masked off properly there shouldnt be any problems!

Getting more air to run around the iron torpedo of a block will always help lower temperatures. Every little thing helps.

Link to comment
Share on other sites

  • 4 weeks later...
  • 4 months later...
  • 2 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

  • Latest Posts

    • Here is my 2013 Nissan Skyline 370GT Type-S has a factory Nismo exhaust and Enkei rims. Shes completely unmodified. Brought her from Cult & Classic and drove down from NSW to Tassie November last year. 
    • Yet another thread bump because I want to talk about this: The general gist that this guy found for a MK7 Golf GTI is that by adding a venturi from a 2022 Tiguan he managed to pull crankcase vacuum far more reliably under boost which effectively stopped oil consumption on his engine in track conditions. An earlier video details how that venturi works: Basically one port is atmospheric vent, one port goes to a boost source, and the last port goes to the crankcase vent. There's a lot of discussion on here about scavenge pumps and all that fun stuff, why not try to replicate that by pulling some energy off the compressor? There is one catch though and that is that the PCV diaphragm on these cars appears to completely block off airflow from the intake when there is enough crankcase vacuum. This contrasts with the RBs where there is basically nothing stopping vacuum from the intake from sucking a big gulp of oil if it gets into the crankcase vent.
    • Hi All, Brought a 4 Door 2013 Skyline 370GT Type-S in November last year. Absolutely loving the car, noticed a few audio issues speakers cutting in and out and the 12V circuit seems to be completely dead (after checking and swapping the fuses) but just wanted to say Hi     
    • Could you please express this thought again with some clarity added?
    • So, whilst the Bogan Cruise Ship is GTG, and I had organised some time today to go on the SAU NSW cruise, my best laid plans where kicked in the balls, well, kicked in my right knee to be exact Now, after a bit of arthroscopic "honing" and tibial band lengthening "modifications" , I'm sitting on a couch in a prescription induced drug haze, watching 5hit on the Youtubes and falling in and out of consciousness......good times  
  • Create New...