Top up or down

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Apr 7, 2012 | 09:23 AM

#21

oinojo

Joined: Feb 2010

Posts: 480

Likes: 3

for fun i put the top up on my corner scales... cross weight stayed the same but rear percentage went from 50.3% to 50.1%... its little but more weight over the rear end sounds good to me

Apr 7, 2012 | 09:27 AM

#22

nissanfanatic

Registered User

Joined: Jul 2009

Posts: 1,024

Likes: 1

Aerodynamic forces are proportional to the square of the air speed over the vehicle.

Apr 7, 2012 | 08:05 PM

#23

robrob

Former Moderator

Joined: Jul 2005

Posts: 4,634

Likes: 28

From: West Virginia

Quote:

Pros-

Can hear the engine better.
Can hear the tires better.More head room with helmet

I agree, for autocross top down is probably better. The increase in drag is might be offset by the lower cg

Apr 7, 2012 | 08:10 PM

#24

robrob

Former Moderator

Joined: Jul 2005

Posts: 4,634

Likes: 28

From: West Virginia

Quote:

Pros-

Can hear the engine better.
Can hear the tires better.More head room with helmet

I agree, for autocross top down is probably better. The increase in drag is might be offset by the lower cg

Apr 8, 2012 | 05:46 PM

#25

Buntinboy9

Thread Starter

Registered User

Joined: Apr 2011

Posts: 801

Likes: 1

From: Southern Indiana

hmm all interesting points and facts and didnt know that it would be that big of a difference for cd on top up down and hardtop.

Apr 8, 2012 | 05:57 PM

#26

JUSTINTHECOASTIE

Joined: Oct 2008

Posts: 4,805

Likes: 15

From: St.Petersburg/Tampa, FL

Top down for better view of the auto-x course. Risk vs reward, vision will help you more than less drag in auto-x

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