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R Thomas

Gen 3 FFR#48 Type 65 Coupe R Build

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Quote Originally Posted by johngeorge View Post
Gen 3 Type 65 Coupe R Kit ordered, now its time to get to the details.

I have been racing the old FFR#48 Challenge Car for the past 11 years, and decided its time to switch it up and try my hand at racing a Type 65 Coupe. The aero advantages and frame stiffness the Type 65 Coupe offers sold me on the switch-o-rooney. So, I sold FFR#48 Challenge Car as a rolling chassis, kept all of the important stuff like engine, dry sump, trans, ecu, data logger, wing, and fuel cell which will go into the new build.

Mark Dougherty, Brendan Dougherty and I are building up the Gen3 Type 65 Coupe R starting in December near Hershey, PA, and will be race ready for the start of the 2017 NASA North East racing season (March/April timeframe.) We will also compete at the Grassroots Magazine’s Ultimate Track Car Challenge @ Virginia International Raceway May 2017.

The car will be classed in NASA ST2, weight/power of 8.00:1, equating to [email protected] with me in it (after all the adds/deductions per rules), 245/40/17 Hoosier A7 DOT tires, and will have aero, front splitter, and rear wing.

Stay tuned for a ton of build pictures, and updates! Cant wait to get started! so excited! cant you tell!


NASA ST2 (8.00:1 weight/power) rules calculations based on ST2 rules: https://nasaproracing.com/rules/Supe...ited_Rules.pdf

Adds/Deductions with Aero (front splitter, rear wing, diffuser, flat bottom):
Min weight of 2600lb = -.1
Use of 245 DOT tires = +.7
Non-Production vehicle = -.4
Total=+.2
Adjusted Wt/HP ratio formula is (8.00 - .2) = 7.8, to get MAX RWHP for NASA ST2, take weight divided by calculated Adjusted Wt/HP ratio. 2600lb/7.8 = 333.33RWHP

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Adds/Deductions without Aero:
Min weight of 2600lb = -.1
Use of 245 DOT tires = +.7
Factory Five Type 65 Coupe = -0.2 (no additional aero)
Total=+.4
Adjusted Wt/HP ratio formula is (8.00 - .4) = 7.6, to get MAX RWHP for NASA ST2, take weight divided by calculated Adjusted Wt/HP ratio. 2600lb/7.6 = 342.11RWHP

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If you do want to run NASA ST1 (6.00:1 weight/power) here is the math:

Adds/Deductions with Aero (front splitter, rear wing, diffuser, flat bottom) and Michelin Slicks (30/65-18 front, 31/71-18 rear, 18"x12" wheels):
Min weight of 2600lb = -.1
Use of Racing Slicks = -.5
Non-Production vehicle = -.4
Total=-1.0
Adjusted Wt/HP ratio formula is (6.00 - (-1.0)) = 7.0, to get MAX RWHP for NASA ST1, take weight divided by calculated Adjusted Wt/HP ratio. 2600lb/7.0 = 371.43RWHP
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