I have a few things going on with the car at the moment. Since obtaining the F20C I am completing as much as I can prior to doing the engine work which will allow me to run in DM, this gives me the ability to lighten the car by 330lbs.
Today I started working on the transmission. I have done some calculations and with my taller rear end, AP1 transmission and higher redline I have much taller gears.
Here is the new top speed in each gear after the engine and transmission changes.
1st - 57mph
2nd - 76mph
3rd - 114mph
4th - 145mph
5th - 171mph
6th - 203mph
I think the car would be aero restricted to 150mph (down hill with a strong tail wind). As such I have decided to remove 5th and 6th gears to save weight. I never use them and even if I go on the track or at the dyno a top speed of 145 is plenty, I thought about removing 3rd and 4th also but feel I lose too much practicality.
Attachment:
IMG_20170115_134500.jpg
At nearly 100lbs the transmission is not exactly light. Hopefully removing 5th and 6th will shave 15+lbs but really not sure what gears/synchros weigh. Being part of the drivetrain it's a great place to lose weight.
Attachment:
IMG_20170115_190839.jpg
I am rebuilding the Wilwood calipers as one brakes with so much more force then the other causing constant single wheel lock up or pulling the car to the side. I have ordered drilled solid (rather than vented) rotors saving about 6lbs of rotating, unsprung mass.
Attachment:
IMG_20170115_190900.jpg
Locally I am running in BM this year as both EMod and Dmod cars are legal in BMod so that makes me eligible for the year long trophy while switching classes mid year. Running BMod I'm well over minimum weight so I removed the 50lbs of ballast. Then for the National events and other local clubs I will run in the correct class and add weight for EM.
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2015 & 2016 EMod Florida State Autocross Champion
2013 & 2014 DSP Florida State Autocross Champion
Scrap Metal Build Log
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