SS/CS Start line Ratios

SuperStock172 · 02-23-2021, 04:49 PM

Hi,

Aussie Super stock question, where our class rules are closely in line with NHRA SS/CS, hence the title. We run a Proflite 3 speed behind a max effort, small cube, high rpm OEM iron headed wedge motor. Converter stall at just a bit over 8000rpm. Car weight is approx 3300lbs. After a reasonable break from racing we decided to change our first gear ratio, we're currently at 2.51 with a 6.0 rear gear, the car seems to launch harder with this gear but as a result the gear shifts are happening sooner and the run home in top gear (1/4 mile) is stretched, which seems to not be helping the e.t at the stripe. Unfortunately, the original ratios in the box were misplaced, but we're lead to believe they were around a 2.2 first. Hoping to pick a few a brains on which direction we should head with our ratio and if we should be aiming to head back to a numerically lower ratio? Thanks in advance for the help.

02-23-2021, 04:49 PM	#1
SuperStock172 Junior Member Join Date: Apr 2018 Posts: 16 Likes: 0 Liked 3 Times in 2 Posts	SS/CS Start line Ratios Hi, Aussie Super stock question, where our class rules are closely in line with NHRA SS/CS, hence the title. We run a Proflite 3 speed behind a max effort, small cube, high rpm OEM iron headed wedge motor. Converter stall at just a bit over 8000rpm. Car weight is approx 3300lbs. After a reasonable break from racing we decided to change our first gear ratio, we're currently at 2.51 with a 6.0 rear gear, the car seems to launch harder with this gear but as a result the gear shifts are happening sooner and the run home in top gear (1/4 mile) is stretched, which seems to not be helping the e.t at the stripe. Unfortunately, the original ratios in the box were misplaced, but we're lead to believe they were around a 2.2 first. Hoping to pick a few a brains on which direction we should head with our ratio and if we should be aiming to head back to a numerically lower ratio? Thanks in advance for the help.