http://www.autospeed.com.au/A_1023/page1.html

Good description of optimum location of air ducts on a car.

 

This is a great article and will help us find the answers to many of the CAI citing questions we've been debating. Thanks for alerting us to it, tze.

 

Excellent article....thanks for sharing it!

 

Thanks for the link. Interesting that the Lexus intake above the radiator and facing forward is a higher pressure area. This might be the case for the S2000 as well.

 

That pressure activated indicator is nifty. Someone should take the Spoon cai and take some measurments. Best done prior to installation. Measure air pressure (car speed needed to activate) at the opening while holding it in the airstream and also at the part that would go to air filter housing; see if there is a drop, increase or no change.

Rick, if you are going to use such a device, I'd like to borrow it and do such measurements if and when I get the Spoon CAI.

 

Is anyone up for this?

I'd be glad to tackle it, except it won't get done for at least a few weeks as I am busy the next 2 weekends, and I suspect this would take anywhere from 3-6 hours to do right (probably 50-100 test points?)

I'd also need to find a more sensitive pressure sensor - I have no intention of going nearly 100 mph in the name of science on a semi-regular basis.

 

Cheers folks

Westsidebilly - you wouldnt have to go that quick i would think - that lexus was doing 100km/h not 100mph (except for that final test I think).

I can't remember who it was who was doing underhood temps in the underhood forum - We should get the two tested together, would be interesting.

Also something I have always been interested in is the length of hte intake tract.

If anyone has good dyno access, hook up different lengths of tubing and see which has the best pwr curve. Its interesting that mugen/spoon etc don't touch the intake tract - just wondering if they researched this

 

You're right, there was only 1 test that approached 100 mph for the Lexus. But honestly, the front of the S2000 is much more "slippery" then an LS400 is. I suspect many areas of it will be very low pressure. I guess I could set an arbitrary limit and say that if it doesn't trigger by 85 or 90 it's a low pressure area.

 

Shingles and I were doing the temp recordings. I'm all tested out. Maybe Shingles?