RogerHinga

Has anyone here done this? Was wonder if some who has might be willing to do this for me. I will pay. Just never had a steady hand when it comes to cutting metal.

https://www.s2ki.com/s2000/topic/324...aluminum-hood/

Skrily

I know of at least 4 people who have this done here. I've been on the urge of doing it too but I want to buy another hood to do it on.

Feezy

Unless you're willing to add some louvers, cutting the hood doesn't really do anything for you other than when you're sitting at a stop light. That's just something to be aware of if you're doing it for cooling.

If you're doing it from a cosmetic perspective then that's totally up to you.

RogerHinga

Any company make louvers for this mod?

Skrily

Look up @S_factor_fabrication on instagram. He makes the louvers.

Chuck S

A buddy's hood is like this. Rain goes right into the engine bay. I've seen no evidence of any benefit to this other than the heat escaping when stopped. Once you bugger the stock hood you can never to back to stock.

-- Chuck

9KRPM2.0

Don't do it, I was prevented from doing it and very happy that I didnt. Ruining a perfect hood.

Steven622

So first and foremost it doesn't rain here, so who cares
Next, there's another hood on craigslist for $160 so you don't have to ruin your current hood if its terrible.

I have a proposal for you:


I have 2 2 sensor thermocouples, so we can measure engine bay temps before and after said hood cut. I'm betting if you just cut the front 2 holes (meaning, the left and right front 2, not the front and middle one), you'd see a pretty good temperature delta throughout the engine bay. I did this when I put a Kamanari hood on my STI and logged over a 120 degree temperature change underhood in some area with the worst improvement being 50 degrees. I also noticed a change in air conditioning temperature output, and of course a difference in IATs. It might also be worthwhile to test the next 2 holes being cut out, but based on their location its more towards the positive pressure zone of the hood and I really doubt their effectiveness. I could be convinced to get a static pressure sensor (basically a sensitive barometer) to get more data.

The test cycle is real simple, we simply log temps every 10 seconds in various locations in the bay so we can graph it at different speeds like :
Parking
25mph
45mph
55mph
75mph
120mph


We might do some testing in between if we get some weird testing results because air might blow directly in vs being an output. I'd also like to test out the theory that adding a bit of rubber trim to the leading edge will increase the flow of air out of the hood and further aide cooling. I also think that at higher speeds the boundary layer will move back so much that you generate positive pressure without something to help raise up the front edge of the vent. Nothing validates better than hard scientific data against naysayers.

RogerHinga

I have a spare hood. Lets do this. I just need someone with a steady hand. Ask me to shoot targets 1000 yards out I am good, but to cut a hood... I doubt I can cut a straight line.

Steven622

I have a body guy that can do it. When do you want to take the preliminary measurements? Shoot me your contact information in pm and we'll get some hard data