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Old 06-01-2011, 02:29 AM   #1 (permalink)
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Hello all

I've admired the ecomodder forum and community for a while now but only signed up recently when a friend from another forum asked for my input on a thread he started here.

Project car is a 1996 Saturn SL1 converted to electric and recently confirmed to have a 100 mile range (roughly 50 MPH). I'm looking for input on belly pans to see what sort of gains can be expected. Right now all it has is a skid plate up front that closes off the area below the bumper. The original location for the fuel tank is also vacant and I'm wondering if having a large pocket like that near the rear of the car could be slowing me down.

Love the forum so far. Great topics and lots of enthusiasm

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Old 06-01-2011, 12:40 PM   #2 (permalink)
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Looking at the Wiki, it's 2.2 (well documented) to 4.8 %

The wiki will also give you some links to belly pan fabrication threads - one of them on a Saturn SL.
Belly pan - EcoModder

2.2% may not seem like a lot, but try pushing the car that far, or get an extension cord that long

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The original location for the fuel tank is also vacant and I'm wondering if having a large pocket like that near the rear of the car could be slowing me down.
Everything that can act like a parachute, will drag you down.

Take advantage of all aero improvements you can, and they'll add up to a serious extra range.

Effectively getting 100 miles out of a DIY conversion is no mean feat.
Many current EVs don't really get that far in the real world.
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Old 06-01-2011, 01:43 PM   #3 (permalink)
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Thanks, I'm curious to see how it compares to cars like the leaf as more numbers start coming in. I have a build thread over on DIYelectric car but it spans several years......
I'm not sure if I'm allowed to post links yet either.

The lithium battery is 32kwh and I only 'burned' 76% of the calculated reserve according to my EV display.

I guess I was hoping for a bit more than 2% though. From what I've been reading here, it seems trucks benefit more due to the tall and messy underbody structural members than a unibody cars, which are generally more aerodynamic underneath to begin with.
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Old 06-03-2011, 11:14 PM   #4 (permalink)
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welcome to em
put up some pics for us
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Old 06-04-2011, 01:11 PM   #5 (permalink)
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Quote:
Originally Posted by david85 View Post
I'm not sure if I'm allowed to post links yet either.
With 10 post you can add links.

Quote:
I guess I was hoping for a bit more than 2% though.
It's still a dirty area, even with a belly pan.
There the wheel wells, the wheels themselves spinning, the air flowing close to the ground.

Quote:
From what I've been reading here, it seems trucks benefit more due to the tall and messy underbody structural members than a unibody cars, which are generally more aerodynamic underneath to begin with.
The messier the starting situation is, the more benefit you'll see.
Some modders also reported more than 2% gain.
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Old 06-04-2011, 02:38 PM   #6 (permalink)
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plus, your belly pan can be smoother than one that has to fiddle with exhaust pipes and gas tanks and such.
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Old 06-04-2011, 06:56 PM   #7 (permalink)
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I started a thread over in the "ecomodding central" section a few days ago and have uploaded a couple photos there.

http://ecomodder.com/forum/showthrea...urn-17675.html

Thanks again
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Old 06-06-2011, 10:31 PM   #8 (permalink)
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glad to see you join here, sharing is awonderful thing. EV's are the way.

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