AutoX SCCA SM2 Rules?
10-18-2008, 11:22 PM
#2
Burning Brakes
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Of the items you listed all are SM2 legal except you may have some limitations on the cage. You need to read the rule book to find specifically how many points and how the cage can be legally mounted.
10-18-2008, 11:27 PM
#3
Drifting
The cage has to be legal by the GCR (road racing rules), but assuming it is, everything you mentioned is legal for SM2.
10-19-2008, 03:19 PM
#8
Racer
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Check with Brian Harmer, Solo Tech, SCCA. bharmer@scca.com
Or John Bauer, Tech mgr club racing, at jbauer@scca.com
Please let us know what the answers are.
Or John Bauer, Tech mgr club racing, at jbauer@scca.com
Please let us know what the answers are.
10-19-2008, 07:50 PM
#9
Drifting
I ran them on both of the cars I ran in SM2 (C4 then C5) and had that question come up on my C5 when I was talking suspension with some friends. Coilovers are fine so long as you don't go changing the mounting points (new a-arms, etc). According to the rules, the upper shock mount counts as a suspension component, so it is free to modify. This means any brackets people use to allow a spherical bearing to be used on the upper shock mount are legal. See 16.1.E. 
10-19-2008, 08:42 PM
#10
I ran them on both of the cars I ran in SM2 (C4 then C5) and had that question come up on my C5 when I was talking suspension with some friends. Coilovers are fine so long as you don't go changing the mounting points (new a-arms, etc). According to the rules, the upper shock mount counts as a suspension component, so it is free to modify. This means any brackets people use to allow a spherical bearing to be used on the upper shock mount are legal. See 16.1.E.
Very interesting. Thanks for the info.
10-20-2008, 02:30 PM
#12
Pro
I ran them on both of the cars I ran in SM2 (C4 then C5) and had that question come up on my C5 when I was talking suspension with some friends. Coilovers are fine so long as you don't go changing the mounting points (new a-arms, etc). According to the rules, the upper shock mount counts as a suspension component, so it is free to modify. This means any brackets people use to allow a spherical bearing to be used on the upper shock mount are legal. See 16.1.E.
By that wording, would a spring not be considered a suspension conponent? And if so, would changing from a transverse leaf spring to a coil-over spring not be changing the attachment points for the spring (even though it doesn't change the attachment points for the shock)?
Based on the SR wording, I'd certainly question the legality of coilovers on the Corvette in SM2.
10-20-2008, 05:19 PM
#13
Melting Slicks
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The SR says "Suspension components are unrestricted as long as they use the original attachment points. For the purpose of this rule, "suspension" is defined as any item that is designed to move when a wheel is deflected vertically."
By that wording, would a spring not be considered a suspension conponent? And if so, would changing from a transverse leaf spring to a coil-over spring not be changing the attachment points for the spring (even though it doesn't change the attachment points for the shock)?
Based on the SR wording, I'd certainly question the legality of coilovers on the Corvette in SM2.
By that wording, would a spring not be considered a suspension conponent? And if so, would changing from a transverse leaf spring to a coil-over spring not be changing the attachment points for the spring (even though it doesn't change the attachment points for the shock)?
Based on the SR wording, I'd certainly question the legality of coilovers on the Corvette in SM2.
Last edited by TedDBere; 10-20-2008 at 07:35 PM.
10-20-2008, 07:15 PM
#14
Drifting
10-20-2008, 07:34 PM
#15
Melting Slicks
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The ASP rule reads:
Springs must be of the same type as the original (coil, leaf,
torsion bar, etc.) and except as noted herein, must use the original
spring attachment points. This permits multiple springs, as
long as they use the original mount locations. Coil spring perches
originally attached to struts or shock absorber bodies may be
changed or altered, and their position may be adjustable. Spacers
are allowed above or below the spring.
The SM2 rule reads:
All Stock, Street Touring, and Street Prepared modifications are
authorized.
SM2: Suspension components are unrestricted as long as they use the
original attachment points. For the purposes of this rule,
“suspension” is defined as any item that is designed to move
when a wheel is deflected vertically. This includes shocks and
struts, control arms, steering knuckles, uprights, etc., but not tie
rods, steering racks, and subframes. In addition, shock absorber/
strut upper mounts are to be considered suspension
components.
I can not find springs listed or mentioned anywhere in the SM2 rules. Stock, Street Touring and Street Prepared all specifically state that the type of spring must be the same type and have the same mounting points. The SM2 rules say the "suspension components" must use the original attachement points. But say nothing about "springs" specifically.
If I were reading the rules I would read them as not allowing coil-overs in an SM2 car. If it doesn't say you can, then you can't.
Can someone point me to the part of the rules, or the fastrack listing, that allows the use of coil-overs in SM2?
Last edited by TedDBere; 10-20-2008 at 07:58 PM.
10-20-2008, 09:23 PM
#16
Drifting
Well I'd certainly listen to Bob at ATI and Stan when it comes to SM2 allowances. So Coil-Overs seem to be OK in SM2 as long as the suspension points are not modified. However:
The ASP rule reads:
Springs must be of the same type as the original (coil, leaf,
torsion bar, etc.) and except as noted herein, must use the original
spring attachment points. This permits multiple springs, as
long as they use the original mount locations. Coil spring perches
originally attached to struts or shock absorber bodies may be
changed or altered, and their position may be adjustable. Spacers
are allowed above or below the spring.
The SM2 rule reads:
All Stock, Street Touring, and Street Prepared modifications are
authorized.
SM2: Suspension components are unrestricted as long as they use the
original attachment points. For the purposes of this rule,
“suspension” is defined as any item that is designed to move
when a wheel is deflected vertically. This includes shocks and
struts, control arms, steering knuckles, uprights, etc., but not tie
rods, steering racks, and subframes. In addition, shock absorber/
strut upper mounts are to be considered suspension
components.
I can not find springs listed or mentioned anywhere in the SM2 rules. Stock, Street Touring and Street Prepared all specifically state that the type of spring must be the same type and have the same mounting points. The SM2 rules say the "suspension components" must use the original attachement points. But say nothing about "springs" specifically.
If I were reading the rules I would read them as not allowing coil-overs in an SM2 car. If it doesn't say you can, then you can't.
Can someone point me to the part of the rules, or the fastrack listing, that allows the use of coil-overs in SM2?
The ASP rule reads:
Springs must be of the same type as the original (coil, leaf,
torsion bar, etc.) and except as noted herein, must use the original
spring attachment points. This permits multiple springs, as
long as they use the original mount locations. Coil spring perches
originally attached to struts or shock absorber bodies may be
changed or altered, and their position may be adjustable. Spacers
are allowed above or below the spring.
The SM2 rule reads:
All Stock, Street Touring, and Street Prepared modifications are
authorized.
SM2: Suspension components are unrestricted as long as they use the
original attachment points. For the purposes of this rule,
“suspension” is defined as any item that is designed to move
when a wheel is deflected vertically. This includes shocks and
struts, control arms, steering knuckles, uprights, etc., but not tie
rods, steering racks, and subframes. In addition, shock absorber/
strut upper mounts are to be considered suspension
components.
I can not find springs listed or mentioned anywhere in the SM2 rules. Stock, Street Touring and Street Prepared all specifically state that the type of spring must be the same type and have the same mounting points. The SM2 rules say the "suspension components" must use the original attachement points. But say nothing about "springs" specifically.
If I were reading the rules I would read them as not allowing coil-overs in an SM2 car. If it doesn't say you can, then you can't.
Can someone point me to the part of the rules, or the fastrack listing, that allows the use of coil-overs in SM2?
That's how it was explained to me. I can definitely see how that can be considered a loose interpretation of the rules, but in my opinion, they would have left in the rule about changing types of springs directly (like in the SP section) as opposed to saying components are free if they didn't want you doing coil-over swaps. It's kind of how the seat rules have been changing since proper racing seats are fine, but people being stupid and bolting in a cloth covered 2x4 and call it a racing seat is not so good.
10-20-2008, 10:16 PM
#17
Le Mans Master
Well I'd certainly listen to Bob at ATI and Stan when it comes to SM2 allowances. So Coil-Overs seem to be OK in SM2 as long as the suspension points are not modified. However:
The ASP rule reads:
Springs must be of the same type as the original (coil, leaf,
torsion bar, etc.) and except as noted herein, must use the original
spring attachment points. This permits multiple springs, as
long as they use the original mount locations. Coil spring perches
originally attached to struts or shock absorber bodies may be
changed or altered, and their position may be adjustable. Spacers
are allowed above or below the spring.
The SM2 rule reads:
All Stock, Street Touring, and Street Prepared modifications are
authorized.
SM2: Suspension components are unrestricted as long as they use the
original attachment points. For the purposes of this rule,
“suspension” is defined as any item that is designed to move
when a wheel is deflected vertically. This includes shocks and struts, control arms, steering knuckles, uprights, etc., but not tie
rods, steering racks, and subframes. In addition, shock absorber/
strut upper mounts are to be considered suspension
components.
I can not find springs listed or mentioned anywhere in the SM2 rules. Stock, Street Touring and Street Prepared all specifically state that the type of spring must be the same type and have the same mounting points. The SM2 rules say the "suspension components" must use the original attachement points. But say nothing about "springs" specifically.
If I were reading the rules I would read them as not allowing coil-overs in an SM2 car. If it doesn't say you can, then you can't.
Can someone point me to the part of the rules, or the fastrack listing, that allows the use of coil-overs in SM2?
The ASP rule reads:
Springs must be of the same type as the original (coil, leaf,
torsion bar, etc.) and except as noted herein, must use the original
spring attachment points. This permits multiple springs, as
long as they use the original mount locations. Coil spring perches
originally attached to struts or shock absorber bodies may be
changed or altered, and their position may be adjustable. Spacers
are allowed above or below the spring.
The SM2 rule reads:
All Stock, Street Touring, and Street Prepared modifications are
authorized.
SM2: Suspension components are unrestricted as long as they use the
original attachment points. For the purposes of this rule,
“suspension” is defined as any item that is designed to move
when a wheel is deflected vertically. This includes shocks and struts, control arms, steering knuckles, uprights, etc., but not tie
rods, steering racks, and subframes. In addition, shock absorber/
strut upper mounts are to be considered suspension
components.
I can not find springs listed or mentioned anywhere in the SM2 rules. Stock, Street Touring and Street Prepared all specifically state that the type of spring must be the same type and have the same mounting points. The SM2 rules say the "suspension components" must use the original attachement points. But say nothing about "springs" specifically.
If I were reading the rules I would read them as not allowing coil-overs in an SM2 car. If it doesn't say you can, then you can't.
Can someone point me to the part of the rules, or the fastrack listing, that allows the use of coil-overs in SM2?
10-21-2008, 12:18 AM
#18
Melting Slicks
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SM2 rules allow for Stock, Street Prepared and Street touring rules to be applied along with the specific allowances outlined in the SM2 rules. Everything I read in all those sections specifically states the OEM mounting points must be maintained. Going from transverse springs to coil overs seems to me to require a change in mounting point. You are not allowed to "read in to" the rules. If it doesn't say you can than you can't.
I don't mean to be a jerk, but I'm having a hard time seeing the allowance in the rules. They don't use the OEM mounting points for the springs. I must be missing something here. Did coil overs used to be allowed in SM2 but are now not allowed?
10-21-2008, 09:59 AM
#19
Pro
I see many "opinions" in the threads posted that coil-overs are legal in SM2, but opinions on Internet threads are worth every penny you pay for them and the only opinion that counts is that of the PC in the event of a protest. If you're considering going with coil-overs for SM2, I'd suggest getting a clarification from Topeka before making the investment (Doug Gill, Solo Technical Manager - dgill @ scca.com).
FYI, there were only three Corvettes in SM2 in Topeka this year, I don't know if any of them ran coil-overs but none finished in the trophies so there'd have been no protest to test the theory even if they did run them. And I haven't seen any of the three posting on this forum to enable asking - anyone know Jake Engstrom (AK), Michael Feldpusch (CO) or Chris Burson (FL)?
10-21-2008, 10:51 AM
#20
Cruising
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