prodracing.com

Unofficial SCCA Production Racing Forum
It is currently Mon Sep 28, 2020 5:48 pm

All times are UTC - 8 hours




Post new topic Reply to topic  [ 124 posts ]  Go to page 1, 2, 3, 4, 5 ... 13  Next
Author Message
PostPosted: Tue Sep 08, 2020 9:43 am 
Offline
User avatar

Joined: Fri Nov 13, 2009 9:12 pm
Posts: 1337
Location: Cbus, OH
The October 2020 Fastrack Prelim was released this morning:
https://www.scca.com/downloads/51929-oc ... 9/download

You can download there and see it for yourself, but below is the proposed modified wording to the brake rules, which will be voted on by the Board of Directors later this year, and if it passes through that, it'll become effective January 1st, 2021. It was the PAC's desire to get this finalized and into official public print prior to the 2020 Runoffs, so it can have adequate time to be openly discussed, as well as give everyone ample time to plan ahead. I can't figure out how to do strike-thru text on this forum, so it's not included here. Any new or moved wording is presented in red though.

In Production, GCR section 9.1.5.E.7., Brakes Level 1 and 2, make changes as follows:
Quote:
a. Stock brake calipers and stock-size brake rotors may be used without penalty, as defined in the “Brakes Std.” and “Brakes Alt.” columns of a vehicle’s spec line.

b. Any other non-stock brake calipers and/or non-stock-size brake rotors may be used with a penalty of 2% of the base weight.

1. Non-stock brake calipers must have a max of 4-pistons and the caliper body must be made of ferrous or aluminum material. Calipers must be mounted in the same location and orientation as the stock positioning. Mounting brackets are unrestricted, but must be made of ferrous or aluminum material. Stock caliper mounting tabs may be modified or removed to facilitate caliper installation. In all other regards, non-stock brake calipers are unrestricted.

2. Non-stock-size brake rotors are unrestricted, provided they fit inside the max wheel limitations on a vehicle’s spec line.

c. All brake rotors must be made of ferrous material, and can be cross-drilled and/or slotted. A two-piece hat and rotor design may be utilized, but the hat must be made of ferrous or aluminum material.

d. Alternate drums can be used, but must be made of ferrous or aluminum material, and be the stock diameter, width, and design.

e.
Cars fitted with rear drum brakes, can convert to rear disc brakes without penalty. Note that the “Brakes Std.” and “Brakes Alt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes stock, from converting to rear disc brakes under this rule. When converting from rear drum brakes to rear disc brakes:

1. Rear brake rotors must be solid and can be no larger in diameter than the largest permitted front brake rotor, as defined on the vehicle’s spec line.

2. Rear calipers and mounting brackets are unrestricted but must be made of a ferrous or aluminum material.

f. Dual braking systems are required. Any dual brake master cylinder(s) and pedal assembly can be fitted. Pressure equalizing and proportioning valve devices are unrestricted.

g. Servo assists are unrestricted.

h. Drum brake wheel cylinders are unrestricted.

i. Brake pads and brake linings are unrestricted.

j. Brake lines are unrestricted.

k. The hand brake and its operating mechanism can be removed.

l. Brake air ducts can be fitted. Front duct inlet(s) cannot extend to the side beyond the centerlines of the front wheels, or beyond the forward most part of the front bodywork/air-dam. Rear duct inlet(s) must face forward, cannot extend to the side beyond the centerlines of the rear wheels, or be located more than 24” forward of the rear axle centerline.

m. Backing plates and dust shields are unrestricted.

_________________
kevin

ruckracing honda's:
'15 & '10 Runoffs FP Champion
'10, '09, & '08 ARRC ITA/ITB Champion


Top
 Profile  
 
PostPosted: Tue Sep 08, 2020 10:00 am 
Offline

Joined: Sun Jan 23, 2011 4:54 am
Posts: 2090
Kevin,
Maybe for sake of illustration, any strikethrough text could be in italics or underlined? (or maybe change to yet another text color?)

_________________
Matt Blehm
Houston Region
EP 1st Gen RX7
STU Scion FR-S


Top
 Profile  
 
PostPosted: Tue Sep 08, 2020 10:41 am 
Offline

Joined: Wed Sep 08, 2010 8:01 am
Posts: 288
The allowance of any size rotor that fits in the wheel is too much. We have fitted 355/380mm rotors and 6 piston calipers inside 18" wheels with ease. There should be some sort of upper limit besides wheel size... The modern cars such as the FRS, 944, RX8 will be able to run massive brakes compared to the older cars...


Top
 Profile  
 
PostPosted: Tue Sep 08, 2020 11:15 am 
Offline

Joined: Tue Oct 22, 2002 6:21 am
Posts: 231
dhrmx5 wrote:
The allowance of any size rotor that fits in the wheel is too much. We have fitted 355/380mm rotors and 6 piston calipers inside 18" wheels with ease. There should be some sort of upper limit besides wheel size... The modern cars such as the FRS, 944, RX8 will be able to run massive brakes compared to the older cars...


There is. Four piston max calipers.

_________________
Peter Olivola


Top
 Profile  
 
PostPosted: Tue Sep 08, 2020 11:16 am 
Offline

Joined: Fri Dec 23, 2011 6:59 am
Posts: 1389
Location: Spring Hill, FL.
Right, increased rotor size is a speed creep. Due the 2%
Better calipers on stock rotor may be a very small speed creep but may increase pad durability and reduce cost.Not due the 2% IMHO .

_________________
Mike Ogren/Protech Racing, http://www.FWDracingguide.com http://www.ogren-engineering.com/ 352.428-8983 mogren@tampabay.rr.com


Top
 Profile  
 
PostPosted: Tue Sep 08, 2020 11:37 am 
Offline

Joined: Mon Feb 29, 2016 9:12 am
Posts: 165
Location: Boston, Ma
So, if this rules proposal is approved, one could install vented, cross-drilled rotors of stock diameter at the front without wight penalty? Even if stock front rotors were solid?

_________________
Anthony Parker
NER 373024
E-Prod. Wanna-be


Top
 Profile  
 
PostPosted: Tue Sep 08, 2020 11:44 am 
Offline

Joined: Fri Dec 23, 2011 6:59 am
Posts: 1389
Location: Spring Hill, FL.
Yeah, It needs a clarification . It should say any "non stock rotor" instead of "non stock diameter".

_________________
Mike Ogren/Protech Racing, http://www.FWDracingguide.com http://www.ogren-engineering.com/ 352.428-8983 mogren@tampabay.rr.com


Top
 Profile  
 
PostPosted: Tue Sep 08, 2020 11:59 am 
Offline

Joined: Wed Oct 28, 2009 9:24 am
Posts: 934
I like it. Nice and simple.

Anyone want to buy some non vented VW Rabbit / Scirocco front rotors? :)

Al Seim
HP VW Scirocco 1.6


Top
 Profile  
 
PostPosted: Tue Sep 08, 2020 12:01 pm 
Offline

Joined: Wed Oct 28, 2009 9:24 am
Posts: 934
Re rotors - it says non stock size not diameter, size would include thickness IMO, thus ruling out a freebee for vented rotors.


Top
 Profile  
 
PostPosted: Tue Sep 08, 2020 12:07 pm 
Offline

Joined: Wed Oct 28, 2009 9:24 am
Posts: 934
Serious question:

Is writing to the CRB the correct way to express our opinion of this, now that it is forwarded to the BOD?


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 124 posts ]  Go to page 1, 2, 3, 4, 5 ... 13  Next

All times are UTC - 8 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group