Need advice for slowing my car down consistently.

Well….my throttle stop didn’t work at all….and there is no logical reason that I can think of to describe what the car did. I really don’t even want to post this because it makes no sense (and sounds like a fish story)….but, here goes.

1st practice run with my throttle stop on, gas pedal would barely move (which is what I wanted)…I launch the car, it feels like a slug for about a half second, then it starts running HARD down the track…Runs 10.95 @ 122.89 MPH… With the weather conditions and weight on the car, on an all out pass I should have run a 10.80 at the same MPH. My foot was nowhere near the floor when I went down the track. I got back to the pit, double checked to make sure the stop didn’t fall off or bend/break…nope, worked just fine, the secondary’s were not opening at all. Needless to say, I must have a pretty serious carburetor issue, or I somehow made my car capable of running 9’s just by changing the oil last week LOL. So after that, for the second time run I just pulled the stop off the car and ran the car to the 1/8 mile and coasted for the last half of the track. This usually gets me close to 12.0 at about 75mph, then it’s just fender racing for the last 100 feet. I got down to 9 cars before I took WAY too much stripe and broke out, but it was a fun day playing at the track.

I’ll be tearing the carb down this week to see if I can find anything before my next race (this coming weekend). Oh well, I will probably just scrap this sportsman stuff and go back to pro where the car belongs….I never knew slowing a car down would be so tough, lol.