Rumor is (I have no first hand knowledge) that drag radials are a poor choice for a stick drag car. Generally, drag radials like to dead hook, because they don't recover well when spun. Bias slicks can recover from a spinning tire start better than dr"s. Spinning start wheel speed can be desirable with a stick car.
That said, drag radials like more pressure than slicks. I would start at 15 lbs, and then go up from there till the 60 fts fall off.
