And the Winner is:...........BRZ to STX ..Oct fastrack

[UncleFester]

Originally Posted by Scooby South

For my own Reference:

What am I missing from the info you posted? 100 cells per inch, 3 inches. Seemed like 100x3=300.

Could you elaborate on your logic/explain it for me?

[Scooby South]

the cat has to be at least 3inches long....with a min of 100 cell per inch ..so for a 2.5 in exhaust...it has toe have 250 cells...that is 3 inches long..

Bill

[UncleFester]

Ah ok. So they are referring to diameter and not length. I was confused.

Thanks for clearing that up.

[Scooby South]

Exactly... ^^^

[Scooby South]

Originally Posted by Mitch

So.. what are our options within that restriction?

most aftermarket has 1oo cells per inch as a Std...so I would say any of them would work ...I know Nameless and Perrin are 100 cells per in..
not sure about Vivids...

Bill

[whataboutbob]

Originally Posted by King Tut

For those of us who are not SCCA AutoX regulars. Can someone do a simple break down of what mods are allowed and expected to be competitive in STX.

Here's the doc online, have at it: http://cms.scca.com/documents/Solo%2...categories.pdf

[Scooby South]

Originally Posted by whataboutbob

Here's the doc online, have at it: http://cms.scca.com/documents/Solo%2...categories.pdf

A great place to start...but not up to date with current rules. (circa 2006 or so)
STR isn't even listed. and wheel and tire allowances have changed in recent years. ..

There is a 2012 rulebook online at the SCCA website:
http://scca.cdn.racersites.com/prod/...ry_reduced.pdf

FASTRACK updates the current rule-set, which is why it is important way to keep up with the changes thru-out the year..

Expect the new rulebook to come out in Feb 2013..that incorporates all the past years Fastracks.

Hope this helps

Bill

[Mitch]

Originally Posted by Scooby South

most aftermarket has 1oo cells per inch as a Std...so I would say any of them would work ...I know Nameless and Perrin are 100 cells per in..
not sure about Vivids...

Bill

I've done some more reading. The way I'm reading it, it's 100 cells per square inch. Perrin says they use a 200 cell cat. If it's really 200cpsi, then it's fine (you could actually go with a less restrictive cat), but if it's actually only 200 cells, then the cell density is too low. I'm not seeing much about cats below 100cpsi, so I'm hoping Perrin's 200 cell cat is 200cpsi.

[Scooby South]

thanks....I thought I had seen somewhere they were using the 100...just confirmed 200 from Perrin.. sorry about the confusion ...and Per 'square' inch makes sense..


Bill

[whataboutbob]

Originally Posted by Scooby South

A great place to start...but not up to date with current rules. (circa 2006 or so)
STR isn't even listed. and wheel and tire allowances have changed in recent years. ..

There is a 2012 rulebook online at the SCCA website:
http://scca.cdn.racersites.com/prod/...ry_reduced.pdf

FASTRACK updates the current rule-set, which is why it is important way to keep up with the changes thru-out the year..

Expect the new rulebook to come out in Feb 2013..that incorporates all the past years Fastracks.

Hope this helps

Bill

Thanks, here's the latest fastrack (I think: http://www.scca.com/assets/12-fastrack-oct-solo.pdf)