Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-19-2011, 09:09 AM   #1 (permalink)
Easter McoModder
 
SwamiSalami's Avatar
 
Join Date: Mar 2010
Location: West Texas, US
Posts: 363

'99 Subaru OLL 2.5L - '99 Subaru Outback Legacy Limited
90 day: 22.57 mpg (US)

Rabbit - '08 VW Rabbit S
90 day: 32.93 mpg (US)
Thanks: 212
Thanked 28 Times in 26 Posts
Factory engine guard/undertray

I bought my beetle used a couple of years ago. to my surprise, the car doesn't have an "engine guard" aka undertray. I guess some bonehead left it off.

My dilemma is that I know this is causing me to use more fuel than I'd like. I'm wondering if getting a factory one used would be the way to go? would that even offer enough improvement, or should I just make something myself?

thanks

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-19-2011, 09:19 AM   #2 (permalink)
EcoModding Apprentice
 
piers.singer's Avatar
 
Join Date: Feb 2010
Location: Sussex/Kent, UK
Posts: 108
Thanks: 4
Thanked 23 Times in 12 Posts
If you can find an OEM one for a reasonable price then it'll save you having to faff about. Just had a look on Ebay.co.uk and there are various engine covers going for not very much more than the price of a sheet of coroplast. Don't know what it'll be like in the USA, but buying OEM is probably a good idea, especially if you're concerned about re-sale values etc.
__________________
Spoken like a champion. Oh no, disaster!
  Reply With Quote
Old 05-19-2011, 06:06 PM   #3 (permalink)
Aero Wannabe
 
COcyclist's Avatar
 
Join Date: Dec 2007
Location: NW Colo
Posts: 738

TDi - '04 VW Golf
TEAM VW AUDI Group
90 day: 53.2 mpg (US)
Thanks: 705
Thanked 218 Times in 169 Posts
The TDI has a cast magnesium oil pan that can be broken on impact with road debris. I replaced my plastic engine cover with an aluminum skidplate to protect the bottom of the engine. More expense but more peace of mind.
__________________
60 mpg hwy highest, 50+mpg lifetime
TDi=fast frugal fun
https://ecomodder.com/forum/showthre...tml#post621801


Quote:
Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
  Reply With Quote
The Following 2 Users Say Thank You to COcyclist For This Useful Post:
ChrstphrR (05-21-2011), SwamiSalami (05-19-2011)
Old 05-19-2011, 08:33 PM   #4 (permalink)
Easter McoModder
 
SwamiSalami's Avatar
 
Join Date: Mar 2010
Location: West Texas, US
Posts: 363

'99 Subaru OLL 2.5L - '99 Subaru Outback Legacy Limited
90 day: 22.57 mpg (US)

Rabbit - '08 VW Rabbit S
90 day: 32.93 mpg (US)
Thanks: 212
Thanked 28 Times in 26 Posts
I love the idea of this, but I just don't know if I want to continue to put money into the beetle. If it was a golf, I'd be gung ho.
  Reply With Quote
Old 05-19-2011, 08:34 PM   #5 (permalink)
Easter McoModder
 
SwamiSalami's Avatar
 
Join Date: Mar 2010
Location: West Texas, US
Posts: 363

'99 Subaru OLL 2.5L - '99 Subaru Outback Legacy Limited
90 day: 22.57 mpg (US)

Rabbit - '08 VW Rabbit S
90 day: 32.93 mpg (US)
Thanks: 212
Thanked 28 Times in 26 Posts
where did you get the upgrade?
  Reply With Quote
Old 05-20-2011, 09:43 AM   #6 (permalink)
Aero Wannabe
 
COcyclist's Avatar
 
Join Date: Dec 2007
Location: NW Colo
Posts: 738

TDi - '04 VW Golf
TEAM VW AUDI Group
90 day: 53.2 mpg (US)
Thanks: 705
Thanked 218 Times in 169 Posts
Panzer Plate heavy duty aluminum skid plate kit for 19982010 New Beetles by www.dieselgeek.com

The plastic ones are often cracked or broken. Perhaps you can find a used one from someone who has replaced theirs with the skid plate. I have a usable Golf one collecting dust.
__________________
60 mpg hwy highest, 50+mpg lifetime
TDi=fast frugal fun
https://ecomodder.com/forum/showthre...tml#post621801


Quote:
Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
  Reply With Quote
The Following User Says Thank You to COcyclist For This Useful Post:
SwamiSalami (05-21-2011)
Old 05-21-2011, 05:10 PM   #7 (permalink)
Easter McoModder
 
SwamiSalami's Avatar
 
Join Date: Mar 2010
Location: West Texas, US
Posts: 363

'99 Subaru OLL 2.5L - '99 Subaru Outback Legacy Limited
90 day: 22.57 mpg (US)

Rabbit - '08 VW Rabbit S
90 day: 32.93 mpg (US)
Thanks: 212
Thanked 28 Times in 26 Posts
do you know if the golf model is the same as the beetle? theoretically, it should be, right?
  Reply With Quote
Old 05-21-2011, 08:32 PM   #8 (permalink)
EcoModding Apprentice
 
Join Date: Jul 2008
Location: Sault Ste Marie, ON, Canada
Posts: 128

Schwartzejetta - '00 Volkswagen Jetta TDI GL
90 day: 52.87 mpg (US)
Thanks: 19
Thanked 16 Times in 16 Posts
Quote:
Originally Posted by dieselbeetle View Post
I bought my beetle used a couple of years ago. to my surprise, the car doesn't have an "engine guard" aka undertray. I guess some bonehead left it off.
That should read, some bonehead TORE it off. I lost mine, on my maiden drive home from the stealership (bought mine 2nd hand though), coming up over the crest of a highway and into/onto/overtop an antelope carcass.

If you look at other Beetles, Golfs, or Jettas of that generation on the highways and freeways, you'll see the plastic "noise supresssion panel" bowing down, even flapping in the wind. They're not very sturdy, nor do they take much abuse until they come off.

Mine was dragging a day after that, and I had to remove mine... so I've had no plastic pan nor side skirts for most of the time, unfortunately. It makes for a louder car, and will curb aerodynamics a bit. But, as COcyclist stated, it's the steel VW pan or the aftermarket aluminium pans you WILL want to replace yours with.

I just lost my oilpan, and 4 of 4.5L of oil on a submerged sewer grate in April. The oilpan on a diesel motor in our cars sits about an inch lower than the gas models do, so don't bother with fixing a minor bit of aero gains with a less expensive used/new plastic pan.

Save your pennies, go sell scrap steel to the salvage yards, collect cans, forego a few months of CATV, whatever it takes.

Quote:
Originally Posted by dieselbeetle View Post
do you know if the golf model is the same as the beetle? theoretically, it should be, right?
Yes, yours is the same as the MkIV Golf/Jetta platform, as far as I know.

Evo Imports, the Canadian company that sells the equivalent skid plate says their plate fits the Beetle, and pretty much every variant of the Golf/Jetta/Beetle of the MkIV generation.

Evolution Atlas Skid Plate With Oil Drain Hole For New Beetle, Golf & Jetta IV

Ask dieselgeek if theirs fits the Beetle, just to be sure.

Worse comes to worst, I can dig up measurements on the hard points on my Jetta, with pictures, and you can compare measurments, to confirm.
__________________
Current mod: Skidplate/Undertray for my MkIV Jetta. Next mod: CAD drawing for skidplate so other Jetta/Golf drivers can make one too!
  Reply With Quote
The Following User Says Thank You to ChrstphrR For This Useful Post:
SwamiSalami (05-21-2011)
Old 05-21-2011, 10:42 PM   #9 (permalink)
Easter McoModder
 
SwamiSalami's Avatar
 
Join Date: Mar 2010
Location: West Texas, US
Posts: 363

'99 Subaru OLL 2.5L - '99 Subaru Outback Legacy Limited
90 day: 22.57 mpg (US)

Rabbit - '08 VW Rabbit S
90 day: 32.93 mpg (US)
Thanks: 212
Thanked 28 Times in 26 Posts
Thanks very much for the insight and expertise!!!
  Reply With Quote
Old 05-22-2011, 10:48 AM   #10 (permalink)
Aero Wannabe
 
COcyclist's Avatar
 
Join Date: Dec 2007
Location: NW Colo
Posts: 738

TDi - '04 VW Golf
TEAM VW AUDI Group
90 day: 53.2 mpg (US)
Thanks: 705
Thanked 218 Times in 169 Posts
Quote:
Originally Posted by dieselbeetle View Post
do you know if the golf model is the same as the beetle? theoretically, it should be, right?
They are not the same on the DieselGeek site. I included the link to the NB for your convenience. I used the one for the Golf/Jetta on my car of course. There are several manufacturers of skid plates including the steel factory VW plate and even an aftermarket steel one if you search around. As ChrstphrR said, it helps aerodynamics and is cheap insurance IMO.

__________________
60 mpg hwy highest, 50+mpg lifetime
TDi=fast frugal fun
https://ecomodder.com/forum/showthre...tml#post621801


Quote:
Originally Posted by freebeard View Post
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
  Reply With Quote
Reply  Post New Thread


Tags
beetle, belly pan, tdi, underbelly, undertray

Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com