Compressor Inlet Question

[Shizuma]

I was thinking about having the passenger side foglight opening feed a tube (filtered) that would give air to the compressor while the driver's side foglight opening would feed air to my oil cooler...good idea or not? would I have any more lag than if I just had a filter attached to the turbo?

[pnoy]

I dunno if it helps... But I would feed a tube towards the filter and the oil cooler.

[Shizuma]

^ yea that's what I meant, the tube on the passenger side would have a filter in it and lead to the turbo while the driver's side would have a tube that lead to the oil cooler...I just wanted to know if it would hurt thr reponse time on the turbo, cause my rationale for doing it is to get alot of cooler air to the turbo

[Gravel]

^ yea that's what I meant, the tube on the passenger side would have a filter in it and lead to the turbo while the driver's side would have a tube that lead to the oil cooler...I just wanted to know if it would hurt thr reponse time on the turbo, cause my rationale for doing it is to get alot of cooler air to the turbo

I must be missing something - taking air from behind the passenger fog light is what all Cold Air Intakes do - just watch for very deep puddles!

The oil cooler idea sounds sensible too :)

[Seven-Of-Nine]

The best method but involves alot of custom work is go for a modified hood carve out a scoop opening then fabricate a huge heat shield underside so the filter is containted with in this protective barrier whilst at the same time gets fresh cold air directly from the outside more so when moving Ram air effect. You will also need to drill some holes in the bottom and use some tubing for water drainage to the bottom of the car. Not too sure how it would look but was an idea I was playing around with.

[Gravel]

The best method but involves alot of custom work is go for a modified hood carve out a scoop opening then fabricate a huge heat shield underside so the filter is containted with in this protective barrier whilst at the same time gets fresh cold air directly from the outside more so when moving Ram air effect. You will also need to drill some holes in the bottom and use some tubing for water drainage to the bottom of the car. Not too sure how it would look but was an idea I was playing around with.

From what I've read, the ram effect isn't that significant unless you're doing 200+ mph! Yes, a ram will scoop in more air, but the most often touted reason for using rams - the positive pressure effect is apparently minimal unless you're doing aircraft speeds!

A lot of dragsters seem to just replace one headlight with an air-filter!

[Jesse IL]

I was thinking about having the passenger side foglight opening feed a tube (filtered) that would give air to the compressor while the driver's side foglight opening would feed air to my oil cooler...good idea or not? would I have any more lag than if I just had a filter attached to the turbo?

I've heard in the past that long convoluted intake tubes to feed turbos are restrictive enough that any benefits of cooler air are lost.

[Shizuma]

I've heard in the past that long convoluted intake tubes to feed turbos are restrictive enough that any benefits of cooler air are lost.

yea that's what I was worrying about, but the thing is, my turbo's compressor inlet is actually facing the passenger's side of the car, so the intake tube would basically run a straight line through the engine bay, under (or around) the pulleys and turn into the inlet at the rear (firewall side) edge of the block...therefore it would have at most 2 bends....what do you think of that?....o and about the ram air thing, I played around with that idea too but there's no way for me to run a pipe to the hood, my intercooler piping is running SF style, the manifold blocks the middle, and since my turbo faces the passenger side of the car, having an intake tube that bent AROUND the turbo so I could run a tube from where the battery sat just seems silly :ugh:

[Gravel]

yea that's what I was worrying about, but the thing is, my turbo's compressor inlet is actually facing the passenger's side of the car, so the intake tube would basically run a straight line through the engine bay, under (or around) the pulleys and turn into the inlet at the rear (firewall side) edge of the block...therefore it would have at most 2 bends....what do you think of that?....o and about the ram air thing, I played around with that idea too but there's no way for me to run a pipe to the hood, my intercooler piping is running SF style, the manifold blocks the middle, and since my turbo faces the passenger side of the car, having an intake tube that bent AROUND the turbo so I could run a tube from where the battery sat just seems silly :ugh:

Oh, I see your problem now - I forgot that you guys have back to front cars as you drive on the wrong side of the road!

If you can safely clear the pulleys and allow for engine movement, then it sounds sensible to me, but I'm no expert. Just remember that large radius bends are better for air flow than 90 deg corners but 3 30 deg bends have the same restrictive effect as one 90 degree one. Have a look at pressure-drop.com for a simple flow-loss calculator.

[Jesse IL]

I've heard in the past that long convoluted intake tubes to feed turbos are restrictive enough that any benefits of cooler air are lost.

yea that's what I was worrying about, but the thing is, my turbo's compressor inlet is actually facing the passenger's side of the car, so the intake tube would basically run a straight line through the engine bay, under (or around) the pulleys and turn into the inlet at the rear (firewall side) edge of the block...therefore it would have at most 2 bends....what do you think of that?
There's no room for it. You have about two inches between the front of the engine and the frame of the car. The only place under the engine to pass a pipe forward is between the oil pan and the transmission, but that's where you pass the pipe coming out of the compressor. Both XS and Hass use the same turbo orientation you do, and they both mount the air filter directly to the compressor. There is also very minimal room on that side of the engine bay. My air filter barely clears the power steering hoses. The other issue you have with this turbo arrangement is interference between the downpipe and the rear engine mount. You need to be careful with that. I made a slight modification to my XS downpipe and ended up having to modify my rear engine mount to get everything together. As it is, I can't remove my downpipe with the rear mount installed.

C2 and some other custom kits like Smaay's mount the turbo the other way, and have an air inlet that comes up to where the battery is to get cooler air, but that requires relocating the battery. Smaay had an issue where his downpipe got too close to the power steering lines and melted them.

[Shizuma]

There's no room for it. You have about two inches between the front of the engine and the frame of the car. The only place under the engine to pass a pipe forward is between the oil pan and the transmission, but that's where you pass the pipe coming out of the compressor. Both XS and Hass use the same turbo orientation you do, and they both mount the air filter directly to the compressor. There is also very minimal room on that side of the engine bay. My air filter barely clears the power steering hoses. The other issue you have with this turbo arrangement is interference between the downpipe and the rear engine mount. You need to be careful with that. I made a slight modification to my XS downpipe and ended up having to modify my rear engine mount to get everything together. As it is, I can't remove my downpipe with the rear mount installed.

C2 and some other custom kits like Smaay's mount the turbo the other way, and have an air inlet that comes up to where the battery is to get cooler air, but that requires relocating the battery. Smaay had an issue where his downpipe got too close to the power steering lines and melted them.

Yea, I have a little more room, b/c I relocated the p/s pump and removed the a/c compressor,...the downpipe I know what you're talking about, I had to modify mine a little too to get it to fit with enough clearence...