How many times are you going to drive at 140+ on the street? or even on a track?

what is the real advantage of this product at speeds of 60-120mph ?

Steve

 

Wow, so theoretically I could hit 180, hehe. Sweet!

Unfortunately I don't think my current setup makes enough power up top for that, though ... But I'd happily settle for 170. Just need to find a place to test it out on now.

thanks guys.

l8r)

 

It's pretty easy to hit 130+ on any sort of sizeable track. I was running a bone stock Evo out at Summit, and was hitting 130 with a passenger. Stock tires, no mods other than pads, no clutch restrictor, and front camber/toe.

Warren

 

Would this work with the Buschur 3" exhaust?

 

Question: It looks like the fins go veritically higher the farther back you go on the car. Wouldn't the diffuser/tunnel effect be greater if the hanging part of the fin stayed at the same height? Then the tunnel cross section area would increase as you go farther back, thus creating a low pressure "tunnel"

 

I found some test information that may shed a little light on the effectiveness of the undertray. It's from the Superfour Challenge, Car and Driver, September 2003.

The Vishnu car is pictured with the undertray. It competed against the Rhys Millen Racing Mitsubishi Lancer Evolution among others and one could argue a fairish comparison. RMR was faster through the twisties (which one can surmise is more a function of driver ability than the car's performance).

Vishnu RMR
HP 310 341
0-60 4.3 4.1
0-100 11.6 11.5
1/4 mile 13@106 13.0@105
100-130 12.3 12.8
Course 128.5 127.8

Of course a lot of factors can come into play, but the 1/2 second difference in the 100-130 mph may be the result of the undertray, especially since the RMR car reported more hp and was faster off the line and was sans aerotray.

just a thought.

 

well i do not drive 130+ on the "streets" that much ....but since i frequent top speed races and such this product comes in handy for me....also if you dont need the product why get on here and argue its effectivness....just dont buy it....

 

I know you know but its not a question on if it is effectiveness but if it is worth it to each individuals needs.

Jay Leno Ill get with you today man

 

thats what i was trying to say....

 

David:

When will the undertray be shipping for the standard exhaust?

How is cooling for the back box effected, if at all, by the undertray (e.g. is the trunk lining going to melt)?

 

What's trunk lining?

 

With that kind of argument, we should all be using mass transit. After all who really needs an Evo or a car for that matter?

If I don't need it........., don't buy it......Please remind me what country I'm living in.

It will help with mileage and it could very well shave a tenth or two off of the quarter mile.

If you compare the quarter mile times to the 0-60 times (if the tray was the culprit), it shaved off .02 from 60 to 106 mph over the RMR car and the trap speed was 1 mph higher than the RMR car.

Some people gut their cars to get those kind of gains.

 

Would it be considered "Ricey" if I bought this thing just because it's "cool"? I really don't care about the 140+mph stability as I will NEVER go that fast on public roads (not in Tennessee anyway...darn rednecks)...

Just in case you didn't know...IM KIDDING!

 

Killer ....well Man It Does Work Awesome....

 

For those interested, here's a good article on underbody aerodynamics ... http://www.bell-performance.co.uk/Ar...20part%203.htm

l8r)