I originally just had “The Exhaust Shop put in a Magnaflow muffler mid-ship and a custom “Y” back 4″ tips. My main goal was to rid myself of the quiet that was camouflaging the strength of the car.
I was successful much to the dismay of a certain VIP who renamed SR35 the “loud headache provoking brat car” that she couldn’t even put her feet on the dash in. :)- So, I started looking at resonance and resonators to reduce the resounding drone without sacrificing performance.
Child’s Performance and Exhaust installed two resonators that really made the cabin noise way more tame and still directed a healthy attitude out the back.
But, now I am looking at taking the SR35 to Barber and driving it for real on a world famous, world class, road race track. One of the things I noticed was that it was important to leave the turn and be able to get to the highest speed possible before decelerating and diving in to the next of 17 turns.
In NASA performance driving they have a kind of equalizing system. The faster you are stock the more modifier points you are assigned. Then if you modify more than 20 points worth you have to move to a faster class. Well positioned in the PT”D” class, I am looking at ways I can stay in class by maximizing what mods I have in place.
Mods in Pace:
My choices are slim. But, I did notice that the “Y” the Exhaust Shop installed was smaller than the resonator exit piping.
It has an inlet of 2.25″ and exits of 2.0″ out to the 4″ tips. I had been reading about scavenging in exhaust terms. As I see it, it creates something like a venturi like effect accelerating exhaust as it travels. I thought it was worth a shot to see what was available. Again I turned to Child’s Performance and Exhaust in Montgomery, AL.
They did have a “Y” with a 2.5″ inlet and 2 2.5″ exits.
It took them about an hour and a half including finishing the car ahead of me. They also centered the run of the “Y” through the hanger and reduced the angles of the pipe out to the tips.
The result, a quieter cabin, a deeper tone, and I have no idea if it is giving me more performance. We’ll just have to see what the hip dyno says on July 28th! #BarberMotorSportsPark#drivenasa