Topics

1

Spud Miller's Cave / RED initial Setup

« on: April 20, 2014, 04:37:35 AM »

Spud, I realize this may be out of your wheelhouse but I'm looking for some initial setup guidance for a RED. Chassis is 235 ",NA 380 ci 1025 hp @ 9800 rpm, 610+ lbft of torque around 8000-8200 rpm, pro flite 3 speed auto trans. Have gear sets for 2.09, 2.20,2.23 lows with 1.40 or 1.45 second gears. Tires available are 10.5 x33x15 (11.2" wide) 103 rollout, 12x33x15 (12.2" wide) 101.5 rollout, and 14.5x32x15 (14.5" wide) 102" rollout, wheels are 11",12" and 14" wide. Rear gears available are 4.71, 4.88,5.00, 5.29, 5.37. would like to keep the rpms down to 10,300. (10,000 initially)  Front to rear, weight distribution is estimated about 30/70 with the ability to move some ballast. I don't know whether 450 lbs frontend static weight  is enough to keep the nose from flying Less tha a foot or so. Run weight is 1530 lbs. My initial thoughts, using what I have are the 2.09/1.40 low/second (maybe could be a bit taller), 5.0 rear gear, the 32x14.5x15 tire on the 14" wide wheel. Launch at peak torque with a bunch of timing out of the motor. Have a 72" wheely bar, but don't want to run it unless we have too. Will run it initially just for safety. Will set it for a frontend lift of about 1 foot or so. Your thoughts?

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Rear Engine Dragsters / RED setup

« on: April 18, 2014, 10:43:36 PM »

Looking for some setup/adjustment guidance for a NA 235” RED. I have some familiarity with the car at a lower HP. New freshened engine (almost together), 380 ci middeck should make about 1025-1050 hp, 600 lbft of torque, peak torque around 8200, trans is a Proflite with 2.09/1.40 gear (thinking maybe a higher 1st gear in the 1.90+ range). Haven’t ordered a converter yet. Would like to keep engine rpms below 10,300 (initially 10,000) out the backdoor. Have  4.71, 4.88, 5.0 and 5.29 rear gears. Have a selection of tires 10.5” -14.5” wide with 101”-103.5” rollout, wheels 10, 11 & 14” wide. Have a long wheely bar, 72 inches (will run initially), but don’t want to use it. Need to determine weight bias, car weight will be 1530 lbs. would appreciate any guidance you might have regarding setup, launch technique and adjustment after run. Have questions about tire size, weight bias, 1st gear, tire pressure, balancing tire width for launch with traction down track. Currently thinking 13.5 to 14.5 tire width with rollout of 101-103.5” and a stiff wall. Does anyone have any information as far as softness of compound comparison between GY D6, Hoosier D06, D07 and MT M5, M8, X8, L8? Any rules of thumb regarding setup and adjustment would be appreciated. Thanks in advance. Another old new guy.