REAL Cold Air Intake

[1991 E30 M42]

I decided to make my own real cold air intake with heat shield and external air source. It works great too, I'll open the hood after a long hard drive and the engine will be hot and the uper and lower intake will be cold, I drove it to Virginia Tech a couple months ago, and on the way back the throttle body started to ice up and I had to stop and let it warm up. It is made of real carbon fiber and I cut up a hood seal and used that to seal the intake from engine heat. As you can see in the lower picture, it makes a positive seal with the hood. If anyone is interested in one let me know, I might be willing to make some.

[Danny707]

Wow that looks really nice.

[kamotors]

wow, looks great, i wish the M20 had that kind of room, great job.

[gjuuu]

wow, looks great, i wish the M20 had that kind of room, great job.

There is plenty of room with the m20 - just as long as you have the radiator with the built in reservoir, no abs and no cruise control

[1991 E30 M42]

looks like an m42 radiator, you can also get the 666fab reservoir that mounts on the passenger side.

[nomad]

ABS is in the way on mine...

[Danny707]

You could work around the ABS fairly easily.

[kamotors]

There is plenty of room with the m20 - just as long as you have the radiator with the built in reservoir, no abs and no cruise control

very true. great job on yours also. I was working on a carbon fiber Cold air box, I designed it in 3d but never got around to actually making one.

[1991 E30 M42]

I have abs, the filter sits on top of the of the abs module. I used carbon fiber as apposed to plastic or fiberglass because of its insulation properties

[roundel318]

I love ABS

[Ruger]

Ive got a similar airbox but a custom fibreglass one shaped as a big velocity stack and what i also did which helped was tilt the radiator about 20 degrees (with custom mounts) and have a 3" pipe going direct into it and it picks up air from where the kidneys are. With this setup and the shape of it all it keeps air speed up as high as possible.

Definately an increase over K&N in the stock box. Most ppl will tell you otherwise but its worth the effort.

[bearsbmw]

I decided to make my own real cold air intake with heat shield and external air source. It works great too, I'll open the hood after a long hard drive and the engine will be hot and the uper and lower intake will be cold, I drove it to Virginia Tech a couple months ago, and on the way back the throttle body started to ice up and I had to stop and let it warm up. It is made of real carbon fiber and I cut up a hood seal and used that to seal the intake from engine heat. As you can see in the lower picture, it makes a positive seal with the hood. If anyone is interested in one let me know, I might be willing to make some.

Nice setuP!! ... however with the AFM turned on it's side like that it's changing you fueling because of the weight of the door flaper

[1991 E30 M42]

Nice setuP!! ... however with the AFM turned on it's side like that it's changing you fueling because of the weight of the door flaper

Its not changing the fuel, I ran several tests on the dyno with a data logger and if anything changed it was so small that I couldn't see it. I also played around with fuel pressure and found that 43 psi (3bar) was not optimal and picked up 10 horsepower and a falter curve by bumping it up to 50 psi.

[bearsbmw]

Its not changing the fuel, I ran several tests on the dyno with a data logger and if anything changed it was so small that I couldn't see it. I also played around with fuel pressure and found that 43 psi (3bar) was not optimal and picked up 10 horsepower and a falter curve by bumping it up to 50 psi.

Intresting! there would be a change but like you said very small and I should have mentioned... nice work anyways

[gtatbrissy]

that looks awesom, where did u get the cf from or did u make it urself