Hitting OD in the 1/4 mile
What mph do you cross at? With your mods, you should not be trapping over 110 mph.
All unlocked converters have slippage. You can use your trap speed and rpm to calculate your slip. A higher stall might or might not have more slip on the top end. There is no blanket rule. Even with more slip, You might cross at 5900 instead of 5700. Put your 3-4 WOT shift at 6200 rpm and you'll be fine.
All unlocked converters have slippage. You can use your trap speed and rpm to calculate your slip. A higher stall might or might not have more slip on the top end. There is no blanket rule. Even with more slip, You might cross at 5900 instead of 5700. Put your 3-4 WOT shift at 6200 rpm and you'll be fine.
Thread Starter
Joined: Oct 2004
Posts: 1,689
Likes: 0
From: Hereford,Lubbock
I trap 103, Well i was just thinking cause with the 3.73's after a shift my RPM's fall to about 4500, ive seen videos where with 3.23's and a torque converter they only drop to 4800 or so. It seems like the reasonable thing to beleive is that add gears to that and ur prolly gonna hit the limiter or go to OD.
He has an LS1, you're an LT1. LS1s trap about 5 mph higher stock for stock. I think your low trap speed has a little to do with your altitude, although it still seems low. I trapped 100.5 with only a catback at sea level.
you can lock your converter in third if necessary...my car with 3.73s aND 26" slicks would cross the traps at 7300 rpms and 140mph. you shouldnt need to shift or lockup the converter if you are willing to turn it to 6400 or so.
