Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Wish me luck!
Thread: Wish me luck!
View Single Post
Old 05-31-2009, 10:58 PM   #5
Focus Addict
tb1999's Avatar
Join Date: Feb 2007
Fan#: 44261
Location: Northern NJ, United States
What I Drive: '05 ZX3 D2.3 & '03 Jag S-TYPE 4.2L

Posts: 1,224
Points 25,495, Level 96
Points: 25,495, Level: 96 Points: 25,495, Level: 96 Points: 25,495, Level: 96
Level Up 15% Completed
Level up: 15% Level up: 15% Level up: 15%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 47 tb1999 Great Standing Member
Buy-Sell-Trade Rating: (7)
Originally Posted by BadIdea View Post
Is the diagonal allowed to go right to left?
For SCCA current rules, yes.

From a engineering perspecitive, I understand that this diagonal is only there to keep the main hoop from "folding" sideways, and this will work equally well when the bar is slanted in either direction. You end up with a pair of triangles either way, and they pretty much work equally well resisting collapse in both orientations.

In an open top car, it is common to see guy's using a "1/2 hoop" design that reduces drag by having less bars exposed above the bodywork.

When that is done, since there is only a bar over the driver's head, the diagonal will slant from top left to lower right when viewed from behind, but with a full main hoop it usually can go either way.

FWIW, in my opinion, keeping as many bars away from the driver as possible means less chance of blunt trauma in an accident. For this reason it is my personal preference to keep the upper portion of this diagonal bar away from my head.
213 whp / 160 wtq D23 NA with stock intake and TB.

Inventor of "The $0 Thunder Throttle" & "Focuzdax-7" brake swap.
I like the same qualities in women and pistons; Lightweight, fast, and with the smallest skirts possible...
tb1999 is offline  
    Reply With Quote