Will 4.11 help my 1/4 ET, put me in the 10's?

**william SS** · 09-20-2009, 10:07 AM

Curent setup is in sig. My curent gear is 3.70. Im making about 480rwhp. I went to the track this past friday and made a motor pass this was the result.

60'....1.60
330....4.59
1/8....7.11
mph....97.38
1000....9.30
1/4....11.15
mph....121.89

If I change to the 4.11's how much would this help my 60' & 1/4 time and would my trap speed go up or down? I'm looking for possibly a 10 sec ET if I change to this gear?

**JaycenK** · 09-21-2009, 09:23 AM

Your an auto. I think you will be out of gear just before the time you hit the 1/4 mile mark. What kind of rpm's does your motor turn? and were dose it make it's power. You would have to be shifting into OD and at those power levels the 2/4 band,or the 3/4 clutch could start to slip a little and eventually give up. I think I read that gears on an auto from a 2.73 to a 3.73 were worth about 2 tenths. cant remember were I read that but I do remember that from an F-body article.

**shady milkman** · 09-21-2009, 10:01 AM

Originally Posted by JaycenK

Your an auto. I think you will be out of gear just before the time you hit the 1/4 mile mark. What kind of rpm's does your motor turn? and were dose it make it's power. You would have to be shifting into OD and at those power levels the 2/4 band,or the 3/4 clutch could start to slip a little and eventually give up. I think I read that gears on an auto from a 2.73 to a 3.73 were worth about 2 tenths. cant remember were I read that but I do remember that from an F-body article.

his trans should be good for the extra beating..but i believe you are right.

**shady milkman** · 09-21-2009, 10:44 AM

i am with jaycenk..i think you will over gear your self and end up hurting your time...look elsewhere for that .15

**bigrondownhiller** · 09-21-2009, 02:13 PM

Shed some weight. They say every hundred pounds or so is worth a tenth of a second. Remove stuff you don't need when you hit the track.

**blackbirdbrain89** · 09-21-2009, 02:43 PM

if u going to run 411s ur going to need 28 inch tall tires.. that will put u at 125 or so @7000 rpm... u might make the 2 tenths with ur 60 ft by changing ur gears and tire combo ... or just look in to a bigger stall and better tires hit a 1.4xx with the wheels up

**shady milkman** · 09-21-2009, 06:42 PM

Originally Posted by blackbirdbrain89

if u going to run 411s ur going to need 28 inch tall tires.. that will put u at 125 or so @7000 rpm... u might make the 2 tenths with ur 60 ft by changing ur gears and tire combo ... or just look in to a bigger stall and better tires hit a 1.4xx with the wheels up

he has mt ets..so he should be good there..wheel stands are for pinks all out...just launching hard is where its at

**william SS** · 10-10-2009, 09:08 PM

Well turns out I didnt have 3.70 gears I had 3.89's but I went ahead and switched to the 4.11's. So far Ive droped .15 off my time and get this from 3.89's to 4.11's I picked up 3.9 almost 4 mph. I was at 121.89 and after gears went to 125.79. And ended up runing a 10.994 with a 1.56 60ft.

**35th-ANV-SS** · 10-10-2009, 09:31 PM

Originally Posted by blackbirdbrain89

if u going to run 411s ur going to need 28 inch tall tires.. that will put u at 125 or so @7000 rpm... u might make the 2 tenths with ur 60 ft by changing ur gears and tire combo ... or just look in to a bigger stall and better tires hit a 1.4xx with the wheels up

Originally Posted by shady milkman

he has mt ets..so he should be good there..wheel stands are for pinks all out...just launching hard is where its at

As a wise man once said on here, you usually go faster with the wheels on the ground

**shady milkman** · 10-11-2009, 06:35 PM

Originally Posted by william SS

Well turns out I didnt have 3.70 gears I had 3.89's but I went ahead and switched to the 4.11's. So far Ive droped .15 off my time and get this from 3.89's to 4.11's I picked up 3.9 almost 4 mph. I was at 121.89 and after gears went to 125.79. And ended up runing a 10.994 with a 1.56 60ft.

congratulations