Drag Racing Discussions > Front Engine Dragsters

calming the car down on the starting line

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Curly1:

--- Quote from: crider on July 28, 2018, 07:25:23 AM ---I made it out to the track last night, Car was still not going straight but at least it was predictable. It was carrying the front wheels and drifting to the right. Kept working with the tire pressure and wheelie bar and it was getting better. Last pass something crapped out in the ignition, and it lost a lot of power but it went straight. Not sure if I finally had it lined out or if it due to the loss of hp though. Guess I'll give it another shot in a week or two

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So are you putting more air in right rear?

crider:
Yes. It seemed to be helping until the MSD box went

JrFuel Hayden:
I agree, add at least 20 lbs to the nose, because the front is slaming up, hitting the WB and unloading the slicks. If you set the WB around 1 1/2-2" a flxable WB should more gently push the fron down. But you may discover you need to add more weight to the nose. That's all about the engine location, you could run less nose weight if you motor was out 46" +. Back in the day TF cars ran the motors out 36" BUT that was before VHT, and they smoked the tires, ie before slipper clutches. The trick JrFuel cars are running 48-52" out now in order to keep the tires spinning some, so they don't dead-hook and puul the motor down below your HP rpm range.
We run our JF powerglide with a 1.68 1'st gear to hit the tires softer, plus the trans ratio is closer to the 1 to 1 of hi gear.
The other thing that has helped us on traction is we run a looser converter, [ now 8500-8700, but my next one will be 8900-9000] it hits the tires softer, and allows the engine to get up to the HP rpm.
A good goal for picking the stall is 1000-1500 below your shift point, but best is to send a dyno run to your converter guys , I highely recomment A-1, they have a lot of FED experience and customers. Again JF rules limit us to 12" wide tires, we run 33 & 31 tall tires. we have tried 33x10.5x15 MT tires too running 7+ pressure, mostly because the MT have stiffer sidewalls designed for 10.5 door cars but our best ET's have been with the Goodyear 31x12x15, at around 5 1/2 to 6 lbs.
BTW Hayden wheels are now dealers for Goodyear and M&H slicks.
I hope this helps

wideopen231:
Curious as to why the 10.5 tire? While I understand motor is not a balls to the wall combo,it still should have butt load of TQ and good hp. Not saying wrong( because I know nothing about tuning FED) just wondering why not more tire.  Does not seem to hurting your hooking car up now that I asked question.LOL

Paul New:

--- Quote from: wideopen231 on August 02, 2018, 05:38:15 AM ---Curious as to why the 10.5 tire? While I understand motor is not a balls to the wall combo,it still should have butt load of TQ and good hp. Not saying wrong( because I know nothing about tuning FED) just wondering why not more tire.  Does not seem to hurting your hooking car up now that I asked question.LOL

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Are you talking about Jon’s car or the original post?  If it Jon’s his car is an all out heads up class car!

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