Drag Racing Tech - I Have a few ?'s

Why am i running slower? Last year ran a 8.347 @ 84.962 mph with 10 bolt 3.42's and DOT slicks. Went to the track tonight with the new set up,12 bolt w/ 4.11's Dot Slicks and line lock.Tires were at 19.0 left line at 5,000 car felt bogging down in 1st-60'1.903,330' 5.47 and finished up with 8.46 @ 82.83 mph and (8.7,8.5,8.8).I hoping maybe the 4.11's would get me around 8.1 or better. I'm confused.

Are the weather conditions the same between your best run and now? If you ran in good air and you're comparing it to summertime air that's a few tenths right there. How are the 60 foots and launching technique comparing? A 12 bolt is slightly heavier than a 10 bolt and will take a little more power to run, so there are a few things to look at here.

Derek

Thanks for your help. I guess I'll try again when it gets cooler.

...If your motor bogges you might as well hang it up.

If you bogg the motor thats almost 1sec of time added to your 1/4 mile time if not more. so if the motor boggs just give up and hot lap it.

Why am i running slower? Last year ran a 8.347 @ 84.962 mph with 10 bolt 3.42's and DOT slicks. Went to the track tonight with the new set up,12 bolt w/ 4.11's Dot Slicks and line lock.Tires were at 19.0 left line at 5,000 car felt bogging down in 1st-60'1.903,330' 5.47 and finished up with 8.46 @ 82.83 mph and (8.7,8.5,8.8).I hoping maybe the 4.11's would get me around 8.1 or better. I'm confused.

12 bolts are heavier than the stock 10 bolt. I also hear that they cost about 20 rwhp due to drivetrain loss.

I did not improve at all by installing 411s in my 10 bolt, but it has helped keep me from burning up clutches.

I knew that 9'' how loss I didn't about the 12 bolt ( it was just heavier),cool
I 'll find some hp and loss weight on the car.Thanks for the help.

what are your mods.do you have a good clutch? you definitely should have improved your 60 with those gears heavier or not? somthing is not right

Free mods,lid and bbk tb.Clutch has about 63,000 on it but feels alright.
60' times are about the same.When I'm on the street she feels strong then on the track.