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Old 12-24-2019, 04:12 PM   #1 (permalink)
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03 Toyota Sienna mod

I’m not sure what it will do. I’m getting 21mpg each week local m, 25/26 highway and I stuck this on the front. It’s a roadside bumper cover I was sick of driving by each day. Let me know your ideas. Sc. 3liter v6 30ok miles. I did rip the roof rack off.




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Old 12-24-2019, 09:10 PM   #2 (permalink)
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Make sure you arenít blocking the transmission cooler completely. It may not be a separate cooler, some are built into the engine radiator. I4 Auto accords of my generation have it in the bottom of the engine radiator.
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Old 12-26-2019, 11:01 AM   #3 (permalink)
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over-fascia

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Originally Posted by SmellyCat View Post
Iím not sure what it will do. Iím getting 21mpg each week local m, 25/26 highway and I stuck this on the front. Itís a roadside bumper cover I was sick of driving by each day. Let me know your ideas. Sc. 3liter v6 30ok miles. I did rip the roof rack off.



You've covered the best ram-air location for cooling.
The over-fascia is encouraging airflow under the nose,which is a no-no unless you have a full belly pan,and it will increase front lift at speed.
Take a look at any Tesla and follow their lead.
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Old 12-26-2019, 11:45 AM   #4 (permalink)
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We just had someone in the forum do a similar grille bock, then he discovered the Grille Block Summary thread.

https://ecomodder.com/forum/showthre...ary-13768.html

In short, start from top down, not bottom up as you have done.

It does look nice though.

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Originally Posted by aerohead View Post
You've covered the best ram-air location for cooling.
The over-fascia is encouraging airflow under the nose,which is a no-no unless you have a full belly pan,and it will increase front lift at speed.
Take a look at any Tesla and follow their lead.
Will a splitter help now?

Or will a spiltter just increase down-force and drag?
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Old 12-26-2019, 01:19 PM   #5 (permalink)
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splitter

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Originally Posted by kach22i View Post
We just had someone in the forum do a similar grille bock, then he discovered the Grille Block Summary thread.

https://ecomodder.com/forum/showthre...ary-13768.html

In short, start from top down, not bottom up as you have done.

It does look nice though.



Will a splitter help now?

Or will a spiltter just increase down-force and drag?
It had one to begin with.Adding in one now is going to add downforce-induced drag.The moment arm in front of the front axle has been lengthened.These changes are subtle and would require virtual fortunes to properly 'tune.'
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Old 12-27-2019, 04:45 PM   #6 (permalink)
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Quote:
Originally Posted by aerohead View Post
It had one to begin with.Adding in one now is going to add downforce-induced drag.The moment arm in front of the front axle has been lengthened.These changes are subtle and would require virtual fortunes to properly 'tune.'
Thank you for answering my question, yes you are right, it did have a splitter of sorts prior to modification.

Possible lifting problem now.

I am going to suggest starting over.

Upper grill block is the standard.

And lose that bug deflector.

If there are dummy openings that do nothing or are there just for styling, then by all means seal them up, or keep them sealed as may be the case on the outer ones.
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http://forums.pelicanparts.com/off-t...xperiment.html

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http://ecomodder.com/forum/showthrea...1-a-19525.html
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Old 12-30-2019, 05:45 PM   #7 (permalink)
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Well, Darn.... kind of thought it was helping, blocking under body air flow. Just went to Fla and back. About 900 miles. Got a 25 cityhwy mix and best going highway was 27.5. I pulled the front hood thing off today. With all the weight up front, Engine,transmission and front passengers, would that negate lift? Here is a side picture. Thx for the info. If I ever get it to 28 mpg Iíll be happy.
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Old 12-30-2019, 11:35 PM   #8 (permalink)
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Quote:
Originally Posted by SmellyCat View Post
I’m getting 21mpg each week local m, 25/26 highway ...........

.........25 cityhwy mix and best going highway was 27.5
Very innovative of you to use a road-side find like that bumper.

This looks like a good improvement in MPG, you should be happy.

If so far you have felt no departmental ill effects of light steering from the nose lifting, then I guess lift is NOT a problem after all.

No overheating either?

I wonder if using A/C in the summer will turn out to be more of an issue than winter driving.
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1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
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Old 12-31-2019, 08:29 AM   #9 (permalink)
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I did not notice it handling worse. I hit 80 a few times. With almost 300k on the whale, handling ainít that tight any more. Summer heat would be an issue. I can easy pull the cover off or cut some Gills in it. Under side of this has a gas tank and spare tire hanging low. Today I can remove the lower and just block the upper part. Letís see what happens.
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Old 12-31-2019, 12:31 PM   #10 (permalink)
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Quote:
Originally Posted by SmellyCat View Post
......80 a few times. With almost 300k ......
We have had some serious winds in the last few days(gusts at 60 mph), and I was driving my wife's Chevy Cruze one of those days.

Not as bad as the Geo Metro she had, and the Geo Tracker I had for 20 years, but you could feel it.

Do not peak pass at 80 mph on gusty days to be on the safe side.

We drove at 60-65 mph most of the time.

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1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
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