streetsmoker

High. I have tried posting this same question on another forum, and nobody has answered it in 2 days, so I'll ask here where a lot more people veiw the posts. And hopefully it won't get moved.

As anyone can see in my sig. I have a BDPP and Edge Juice stacked. I have not dyno'd the two together, but I got 376hp/680tq just from the Bully Dog, so I know I'm @425-450 now. Yesterday, I ran a 14.4 1/4mi.@104mph. I know it is hard to get a good launch with a 2wd, but I know my trap speed is a little fast. So what sort of times could I be getting if I get better at the start. And can anyone here reccomend anything that could help.

John Rodriguez

I've done a 13.88 @ 101mph with the tranny slipping to high heavens, so assuming you can get a killer 60' like a 1.7-1.8 you'd be in the very low 13's.

Forgot to add, I've ran 14.3 @ 96mph on 37" tires weighing in at 7,820lb.

bbhzx12

Couldn't tell you anything about Ram times, but I do know that the first 60 feet makes a huge difference at the other end so working on the launch should give you noticably better times.

AK RAM

What are your 60ft times?

Your reg cab is probably a pretty light truck, but to have a trap speed that high, yet a trap time that slow, I would think you would need well over 550hp and have a severe tire spinning problem all the way through the first 60ft. Are you running at a track or taking all of your numbers off of your Attitude Monitor?

It is all about the launch. Getting good, consistent launches in 2wd is not easy. Practice, practice, practice. Sticky slicks on the back will help. If you can just hook-up, knocking a full second off should be cake.

streetsmoker

At 1st, I was only getting them off the monitor. Then I was reading 14.7-15.1@99mph consistantly. I know it felt faster so when I took it to the track, thats when I pulled the numbers listed above.My 60ft times are in the 2.3-2.5sec range. I have as yet to try and lower my air pressure in the rear tires . I know next to slicks, it the best thing to do. I is real difficult to get on the throttle without spinning to high heaven, until the truck has rolled about 2 truck lenghts after coming off the launch at 1500rpm's. My 1/8mi times avg. 9.2-9.4@85 or so.

streetsmoker

I'm just looking for some more advice. And input.

Shovelhead

Remember, sometimes a little tire spinning is your friend.
It can get the RPM up, and prevents part failures (Clutch Discs, Input shafts, U-Joints, Rear Gearsets) from the high torque suddenly shocking the driveline.

mikmaze

^^^ I gotta remember that line for the next time I get pulled over by the po po,,,,, officer, honest I was trying to prevent shocking my driveline with all the torqe by letting a little leak out into tire spin.......

streetsmoker

Hey, AK Ram. You gonna chime in and let me know what you think?

abc4yew

SS, Drop the tire pressure, load the tires , warm them up good prior to launch. (see AK RAM's tire warm up), make sure the axle locks by practicing and checking your burnout marks, and keep practicing. ks

AK RAM

Yep. That's about it. My big heavy truck will run 8.2s in the 1/8th with no tire slipping. With as much power as you have and as light as the back end of your truck is, that is going to be critical. Just lowering pressure may not be enough with that much power. You may have to pick up a set of slicks for the back to control that beast. Stopping the tire spin off the line and through the 60ft mark is going to help you tremendously. Sticky tires and practice, practice, practice. It's fun, ain't it!

streetsmoker

THANX for all the help. Yup! I figured that was the next step. Couple more questions though. How well does the drivetrain hold up to repeated dragstrip use? And where do I find slicks to fit the rear and clear the brakes. I can't find any 17'' slicks that are at least as tall as the factory rubber. What pressure do you reccomend lowering to, cause I know if you go too low the rim can slip inside the tire and pop the bead.

abc4yew

SS, Drag Radials run at 15 to 25 psi depending on set up and condition. Stock tires will probably pop the bead at 25 psi under our torque, especially with tall sidewalls. The wider the rim the firmer and wider the contact patch. Most of the drag radials are smaller diameter so top speed will be limited. Toyo performance tires for trucks are popular for truck racing as they come in larger diameters, you can drive to the track and they are durable.
My choice for a set of drag wheels and tires would be 18" Toyo Proxes s/t on bead locks.
The fronts I'd match for diameter only and run a stock tire as I'm 4x4.
I saved my Cooper M/S which are now almost slicks as they are very soft compound. I'd use those to drag race as that will give me tons of rear traction with the dualies.
To help with traction you can move your batteries to the very back of the truck and use a 20 or 30 gallon fuel cell mounted in the spare tire spot. These diesel trucks are way nose heavy so anything you can hang past the rear axle will help you hook up. ks

Here's some tire links and available sizes.
http://www.intercotire.com/site50.php
https://www.hoosiertire.com/Drtire.htm
http://www.mickeythompsontires.com/strip.html
http://www.nittotire.com/tires_555r.asp
http://www.racegoodyear.com/products/dot_drag.html
http://www.toyo.com/tires/tire_lines...dex_frame.html
M&H
275/50R17 28 dia
ROD-06R

390/40R17 29.5 dia
ROD-09R


Hoosiers
17330 P275/40R17 M 9.8" 25.7" 81.0" 9-11" 10" 11.3" 21
17335 P335/35R17 M 12.5" 25.4" 82.0" 11-13" 12" 13.5" 25

Mickey Thompson
3743R P275/40R17 R2 28 9.0 26x11.50R17 11.0 10.2 26.0 82

Nitto
P245/45 R17 95V 6.3 25.71 9.69 7.5-(8.0)-9.0 1521@44 808
P275/40 R17 93V 6.3 25.63 10.91 9.0-(9.5)-11.0 1433@44 811
315/35 R17 102V 6.3 25.79 12.13 (10.5)-12.0 1874@44 806
285/35 ZR18 97Y 5.0 25.91 11.22 9.5-(10.0)-11.0 1609@44 802
305/45 R18 110V 6.3 28.78 12.05 9.5-(10.0)-11.5 2337@44 722

Goodyear
275/40-17
315/35-17

Dunlop
225/45-17
315/30-18
345/30-18
275/35-18
395/35-18
245/40-18
265/40-18

Toyo
275/60R17 111V 242220 7.5-8.0-9.5 39 11 30 11.0 13.5 2403 44 694
285/60R17 114V 242230 8.0-8.5-10.0 42 11 30.4 11.5 13.7 2601 44 683
235/65/R17 104V 242640 6.5-7.5-8.5 31 11 28.9 9.5 13.2 1984 44 718
225/55/R17 97V 242630 6.0-7.5-8.0 27 11 26.7 9.0 12.3 1609 44 777
275/55/R17 109V 242620 7.5-8.5-9.5 38 11 28.9 11.1 13.1 2271 44 720
305/60R18 120V 242290 8.5-9.0-11.0 47 12 32.4 12.0 12.6 3086 44 645
285/60R18 116V 242270 8.0-8.5-10.0 43 11 31.4 11.5 14.3 2756 44 661
255/55R18 109V 242160 7.0-8.0-9.0 34 11 29.0 10.4 13.3 2271 50 718
295/45R18 108V 242280 9.5-10.0-11.0 39 11 28.4 11.6 13.0 2205 44 733
255/45/R18 99V 242590 8.0-8.5-9.5 30 11 27.1 10.0 12.5 1709 44 767
255/60/R18 112V 242650 7.0-8.0-9.0 37 11 30.0 10.4 13.7 2469 50 693
285/50/R18 109V 242610 8.0-9.0-10.0 37 11 29.1 10.4 13.3 2271 44 715
255/50/R18 106V 242470 7.0-8.0-9.0 34 11 27.9 10.2 12.9 2094 50 744
275/55/R18 114V 242480 7.5-8.5-9.5 39 11 29.8 11.1 13.6 2601 50 696