Belly pan or vortex generators?

[COMP]

Originally Posted by jim-frank

There are some nice tutorials at the WISIL site, including one on vacuum bagging at http://www.wisil.recumbents.com/mars...FS00intro.html

cool

[edbso]

The belly pan is continued with lexan from the rear axle to the back bumper.

I want to do some work around the wheel wells. Likely will use some spray foam to tidy up the openings.

On the now much shorter list are front wheel diffusers, before and behind,
Smaller rear wheel diffusers,
Rear wheel skirts, and
Fresh fill of Amzoil transmission fluid.

I also wand to do some work with vortex generators to smooth the air coming off the back of the car and coming off the rear view mirrors.

I can't wait to get a tank of gas through the car on a highway roadtrip.

[edbso]

So I have a tank of gas through the car average 65 mph
got 41.39 miles per CDN Gallon. EPA is 36
I am satisfied. Was also running into a headwind.

[COMP]

Originally Posted by edbso

So I have a tank of gas through the car average 65 mph
got 41.39 miles per CDN Gallon. EPA is 36
I am satisfied. Was also running into a headwind.

[edbso]

Well I have the back side of the trip in.
Had the cruise set on 65 mph, 379.5 miles

Fuel Consumption
Litres per 100 Km .......... 6.66
Miles per Imperial Gallon .. 42.42
Miles per US Gallon ........ 35.32
Kilometres per Litre ....... 15.03

17.8% over the Highway EPA at 65mpg. I continue to be a happy puppy ;-)

[ttoyoda]

Do you plan to measure your catalitic convertor temperature? If the temperature gets high enough the ceramic honeycomb inside will begin to erode. The erosion may partially block some of the honeycomb.

here is one of the possible part numbers for the matrix cat and front pipe from the factory:
174100D170
here is the price from 1st toyota parts $842.28

Though with the price of gas maybe your answer is "don't care".
Thats OK too.

[edbso]

Thanks for your concern.
I think that there is enough air around it to keep it in the operating range.
Additionally no one ever, except under warranty replaces a cat with a Toyota stock cat. Not even a lottery winner.
MagnaFlow Catalytic Converter 94105 at $65.10 is the part all the enthusiasts use.

[ttoyoda]

Okay, I did not mean to be a wet blanket.
If you are willing to cut and weld the exhaust system, then an aftermarket cat is a better deal.

Reason I mentioned it was that I once was a passenger in a very old honda civic which had some water in the gas, and the car was misfiring and putting raw gas into the cat.

The car ran poorly, but it ran, and the driver just wanted to get it home. It was only when someone passed us to say we had orange hot and molten things falling from under the car that we found out that the cat casing was melting away and falling on the road. I would have never believed that was possible if I had not seen it myself. When we opened the hood the cat (it is right on the exhaust manifold in that car) was glowing very bright red. It was a sunny day in the winter, and you could see the cat just glowing very plainly.

So now I have a lot more (excessive?) caution about cats.

[edbso]

I have added Zig-Zag Vortex Generators aka a Turbulator on my side rear view mirrors.



Frankly I don’t feel or hear anything different and do not expect to find a measurable effect on the mpgs. I also do not see the potential for any large or measurable negative effects.

Then I added Zig-Zag Vortex Generators aka a Turbulator on the front A Pillars and there is a dramatic reduction in wind noise. There is still some left but it is dramatically reduced

Given that Toyota has used Vortex Generators on the Tacoma outside rear view mirrors and there is some excellent glider data for the Zig-Zag Vortrex Generators I thought that I would go for it and am much more than pleased at the results.

[COMP]

where did you get that ???