ST class intake rule clarification

[xstar]

ST Rule regarding intakes:

(Original)
5. A. Any air cleaner may be used. Original carburetor or fuel
injection throttle body (or OEM equivalents with same flow rate) must
be used. In all cases, intake manifold must remain stock as delivered.

(Proposed)
5. A. Any air cleaner or intake (up to the throttle body for naturally aspirated vehicles and up to the turbo/supercharger compressor inlet for forced-induction vehicles) may be used. Original carburetor or fuel injection throttle body (or OEM equivalents with same flow rate) must be used. In all cases, intake manifold must remain stock as delivered.


The intent is to clarify the rule regarding section of the intake from the air cleaner/filter to the throttle body. The original rule does not specify, thus leaving the decision up to the steward interpretation of the rule.

(Updated to cover forced-induction vehicles)

[Stynger]

The intent is to clarify the rule regarding section of the intake from the air cleaner/filter to the throttle body. The original rule does not specify, thus leaving the decision up to the steward interpretation of the rule.

IMO this is a good update. It doesn't change the rules intent, but clarifies the wording.
The interpretation of this rule has been varied, I'm sure those effected would back such a rule change.

[kfoote]

The intent is to clarify the rule regarding section of the intake from the air cleaner/filter to the throttle body. The original rule does not specify, thus leaving the decision up to the steward interpretation of the rule.

IMO this is a good update. It doesn't change the rules intent, but clarifies the wording.
The interpretation of this rule has been varied, I'm sure those effected would back such a rule change.

Agreed. To me, this seems like one of those rules changes that won't require much debate, and should pass easily.

[WillM]

I agree. This rule should make it through, especially since the current rule is vague. Stock class says air filter is open, ST says air cleaner is open.

I interpret 'cleaner' as what we commonly consider 'intake'.

IE: My vaccum cleaner has a filter inside of it.

Bravo, X! =D> [-o< =D> [-o<

[MiataSteve]

I too would like to see this change. Does the proposed rule leave a loophole for forced (super or turbo charging) induction installed forward of the throttle body/carburetor?

Just playing Devil’s Advocate.

[boltonite]

Here's a video of how to be creative or stupid with an open intake rule:

http://videos.streetfire.net/Player.asp ... CA9564&p=0

Right-click on the video and zoom to full-screen to get the full effect.

Fred F

[BrakeL8r]

I too would like to see this change. Does the proposed rule leave a loophole for forced (super or turbo charging) induction installed forward of the throttle body/carburetor?

Just playing Devil’s Advocate.

Rule X.6.C covers this case (at least for ST):

C. Turbocharged and supercharged cars will be moved up one class
from the normally aspirated version, unless otherwise specified.

--Michael
ST4 Miata #176

[Grippy]

This should be a no brainer as it is just a clarification of the existing wording. It seemed pretty clear to me but others had questions. Let's get this put to bed.

[therooster]

" C. Turbocharged and supercharged cars will be moved up one class
from the normally aspirated version, unless otherwise specified."

This only applies to OEM/Factory installed turbo/supercharger. If you add an aftermarket kit onto your car you instantly get transported to a very SPecial place.

Chris A.

[mossaidis]

Thank you for the clarification. Then would allowing boost modifications create too much of an unfair advantage for turbo cars?

[therooster]

I thought that boost controllers were discussed at either the rules meeting last year or the year before. I quickly looked for my notes but I am a little disorganized at the moment and can not find them. Am I crazy or does any on else remember that meeting?

Chris A.

[xstar]

Thank you for the clarification. Then would allowing boost modifications create too much of an unfair advantage for turbo cars?

This proposal is only meant to clarify the intake before the throttle body. Boost modifications for forced-induction vehicles is a separate issue.

See the following thread for boost modification discussion.

http://www.comscc.com/forums/viewtopic. ... 04de3d#623

[xstar]

Rule change submitted.

[xstar]

Updated original proposal to include forced-induction vehicles.

Included further clarification to close a loophole that would allow possible intercooler modification on forced-induction vehicles in ST.

[ctkag]

Well, I'd like to see another clarification too around the intercooler - allowing the intercooler hoses to be changed to the commonly used silicone hoses. These are post turbo but pre throttle body.

-Keith-