Drag Racing Discussions > Front Engine Dragsters
How to properly launch a FED?
GlennLever:
Who are you and will you be at the HRR next week?
As of right now we will be going.
I'm not preregistered, but called NHRA and was told I can do that at the gate.
Mister_Fitz:
--- Quote from: slingshot383 on June 05, 2014, 03:48:43 AM ---A softer (lower rpm) launch will make it easier to climb the ring gear. You want to launch at 600 - 400 rpm under the converters stall speed. And yes, it raise slicks air pressure @ 5 psi. increments until you start slipping the tire. You really need somebody watching the car to help with that, shorter wheelie bar contact with pavement, less than 4 wrinkles of the slick at launch movement. Those wrinkles are important clues also, they need to be in the lower front of the tire, and not behind axle centerline.
--- End quote ---
I will try to launch 600 - 400 rpm bellow the converter stall speed next time I'm on the track.
In what range will a "normal" tire pressure be? I know it will depend on a lots of things, but it would be good to just have an idea. I have been running around 10-12PSI before. Wouldn't the tire pressure be very high if I increase with 5PSI a couple of times until I get some tire speed?
--- Quote from: GlennLever on June 05, 2014, 05:54:39 AM ---Take a look, remember I am a low HP dragster only running 8.00
--- End quote ---
GlennLever, what is the size of your tires? How much pressure do you run in them?
George:
My injected combo liked 6-7 psi with the Goodyear 8525. It was a SBC 640hp and weighed about 1500# wet with driver.
jspell:
George, what ET / MPH did that set up run? How high on the two-step?
George:
Best Time: 5.08 ET. 1.06 60' . 138.mph. 1/8 mile Engine: SBC 23 degree. 100% Alky. 355CID. Cast Iron.
Track: Central Illinois Dragway. Havana , Illinois
Vehicle: FED 223" 6.00 Cert. (owner)
5500-5800 launch rpm
Short block and Convertor are for sale. We built a blown combo. George
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