What kind of power needed to be in the high 10s???

1972DusterPaul said
I found this chart on the internet.

Personally, I am rebuilding my 340 over the Winter looking for 420hp and having a 12 second car (high or low is okay with me)

It shows how much horsepower is needed at the flywheel to run an Elapsed Time in the ¼ mile. This chart is under optimal conditions. The entire car must be set up perfectly to run these times. Very few cars run 100% of their optimum. Wheel spin, slow shifting, clutch slippage, and other factors reduce the amount of usable horsepower.

...................... 2600 2800 3000 3200 3400 3600 3800 4000
15.0 seconds...167.. 180.. 193.. 205.. 218.. 232.. 246.. 257
14.5 seconds...186.. 200.. 213.. 228.. 242.. 256.. 270.. 285
14.0 seconds...206.. 222.. 237.. 253.. 270.. 285.. 301.. 317
13.5 seconds...230.. 248.. 265.. 283.. 300.. 318.. 335.. 353
13.0 seconds...257.. 277.. 297.. 317.. 337.. 357.. 377.. 397
12.5 seconds...289.. 311.. 334.. 356.. 378.. 400.. 423.. 445
12.0 seconds...327.. 352.. 377.. 402.. 428 ..453.. 479.. 504
11.5 seconds...372.. 400.. 429.. 458.. 486.. 515.. 543.. 572
11.0 seconds...425.. 458.. 490.. 523.. 556.. 589.. 620.. 653
10.5 seconds...488.. 526.. 563.. 600.. 638.. 677.. 714.. 751
10.0 seconds...565.. 608.. 652.. 695.. 739.. 783.. 826.. 870

Perfect...you beat me to it! These calculations are pretty reliable when the variables you mention are taken into consideration. The only big question mark is how well calibrated the dyno was...and how different the conditions are at the time of the actual 1/4 mile run. There can be a substantial variation between what the dyno tells you and how much power you're actually making on the strip.

I hang around on the Mustang forums (I have an '11 GT) and the guys on that forum claim to be running 11s with just slicks, to which I said that no 3800 lb car (2011+ Mustang GT with light weight driver) could do this unless the quarter mile was down hill...but they hate science and therefore hated what I had to tell them. :p