Aero on a Prelude - Page 2 - Fuelly Forums
Go Back   Fuelly Forums > Fuel Talk > Aerodynamics
Search Today's Posts Mark Forums Read
Thread Tools Display Modes
Old 01-10-2008, 06:39 AM   #11
Registered Member
Join Date: Jan 2008
Posts: 15
Country: United States
Originally Posted by HAHA View Post
I'm also a Prelude (gen 4) owner and I have been doing some FE experiments the last months. I have the 2 liter engine with manual gearbox.
The easiest thing you can do is to tuck in the side mirrors. This seems to have a dramatic effect on aerodynamics and improved FE by about 5% at highway speeds for me.

I also switched to 195/60 16" wheels which is a 5% increase in circumference. This increased FE by another aproximate 5%.
I currently get about 40 mpg at highway speeds with a bit of Pulse & Glide and other tricks. However, this is in the Swedish winter with quite a lot of rain, snow and wind. I expect figures to improve when it gets warmer.

I have noticed from looking at raindrops that the airflow isn't attached on the rear window, which is a little surprising looking at the shape of the car. I haven't done tuft-testing yet but I suspect this has something to do with the turbulence from the seals around the sunroof.
I'm going to do the yarn testing this weekend, i'll keep you updated. i already "fish-scaled" my front fenders as much as possible. i haven't driven on the highway though, so i can't talk about the noise. i hope between the two of us, we can come up with something to net a total 15-20% gains. 40 is really impressive, i have an 2.2L-auto and the best i've been able to get is about 26-27mpg.

severedgein is offline   Reply With Quote
Old 01-10-2008, 03:19 PM   #12
Registered Member
Join Date: Feb 2007
Posts: 104
Country: United States
26 mpg highway?!?! What speed? I thought Hondas were supposed to get great economy. My 3.0L, LeBaron sedan (0.41Cd) did better than that stock with an automatic. If that was my car, I would be looking to fix it first before doing any aero mods. Is your gearing just that short (high rpm's hurt FE) or maybe you should consider a tuneup.

You don't necessarily need a race-style diffuser, but most cars have a big gap between the rear bumper cover and the trunk well. Consider filling this area in with something. Keeping air from catching the rear bumper and turning it into a sail can't hurt.


GasSavers_BluEyes is offline   Reply With Quote
Old 01-10-2008, 03:45 PM   #13
Registered Member
GasSavers_SD26's Avatar
Join Date: Dec 2007
Posts: 529
Country: United States
Aren't Prelude's a bit more performance oriented? I think that's where the loss of MPG might be. I'm sure it does well passing on the interstate and all.
GasSavers_SD26 is offline   Reply With Quote
Old 01-11-2008, 04:03 AM   #14
Registered Member
Join Date: Jan 2008
Posts: 15
Country: United States
its a 200hp engine. its more performance than economy. the slushbox doesn't help.

severedgein is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuelly Mobile Location Data xbadcrcx Fuelly Web Support and Community News 4 06-29-2011 05:00 AM
SMS banner. DTMAce Fuelly Web Support and Community News 3 03-08-2010 09:56 PM
elg's Project zpiloto General Fuel Topics 2 03-03-2007 06:47 PM
I'm going nuts! buying tires soon lovemysan General Fuel Topics 11 12-23-2006 08:13 AM
Search feature added Matt Timion Fuelly Web Support and Community News 1 09-26-2005 02:02 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 04:32 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.