New STF SCCA Class Thread
- Thread starter Andres3165
- Start date
Andy Hollis
Member
- :
- 2012 Mazda 2 Sport
Tires were not the issue. I had full-tread rains sitting in grid. There was no standing water, just moist surface. And my "dry" rears were fresh 3/32nds. Perfect for that condition.
The issue was the roll stiffness split I am running. Way biased towards the rear which works great for dry, grippy pavement. Better power-down off the corner, and much improved transitional response. But it works by overloading the rears on corner entry.
So the solution is to go back to a more normal, factory roll stiffness split.
I had this exact same issue with the ST Civic and am using the same basic solution.
Andy Hollis
Member
- :
- 2012 Mazda 2 Sport
A couple of people asked me about pricing on the AST rear shocks I am running. They are $550 a corner direct from AST. Contact info is here: AST-USA These are custom-valved single adjustable shocks with DDP piston upgrades. Cushy on the street and enough adjustment for use with spring rates as high as 1000#. You can use a 60mm id spring right on the OE spring mount, so long as it is around 6-7" long. Or use a 2.5" id with an adapter ring. AST has those rings, too.
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Andy Hollis
Member
- :
- 2012 Mazda 2 Sport
Installed the AWR motor mount today. Shoulda done that sooner. Huge difference in feel of the throttle. Actually feels connected to the motor now. Removes a lot of the delay between throttle movements and tire movement. I'm thinking it will improve Pro Solo launches, too.
No Peru for us. Not worth the drive just for a Tour. No plans for Toledo, either.
Well now, there's a blast from the past. Good times, they were.
No Peru for us. Not worth the drive just for a Tour. No plans for Toledo, either.
Well now, there's a blast from the past. Good times, they were.
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Andy Hollis
Member
- :
- 2012 Mazda 2 Sport
Andy Hollis
Member
- :
- 2012 Mazda 2 Sport
Got a tune today...Dynotronics/DPTune
Still have the OE exhaust manifold/cat, so we went with a conservative tune. Noticeable torque increase, especially from 4000 and up. The big improvement was raising the rev limiter to 7200. 1st gear now feels "right" and the shift to second isn't nearly as much of a bog.
We're headed out to Packwood so no time for dyno work just now. We'll do that when we get back to quantify what we've done so far. Also should have a header on the car by then. Some cool developments on that front coming.
Car is finally feeling much more racey, and not so much of a slug.
Still have the OE exhaust manifold/cat, so we went with a conservative tune. Noticeable torque increase, especially from 4000 and up. The big improvement was raising the rev limiter to 7200. 1st gear now feels "right" and the shift to second isn't nearly as much of a bog.
We're headed out to Packwood so no time for dyno work just now. We'll do that when we get back to quantify what we've done so far. Also should have a header on the car by then. Some cool developments on that front coming.
Car is finally feeling much more racey, and not so much of a slug.
skullsroad
Member
- :
- Mazda 2
A tune is something I'm really really looking forward to. This car, even stock, seems to be dead under 4000. With a raised rev limiter, that would make more sense. Watching this closely, thanks.
- :
- 2012 Touring MT
funny thing about that is the car makes 80% of its torque at 2000
- :
- All Mazdas!
That is along trip to head out to Packwood WA for you. Good luck!
