2 wheel launches @ the strip - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 14 (permalink) Old 11-10-2005, 08:50 PM Thread Starter
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2 wheel launches @ the strip

Can I lower the air pressure enough to make 2 wheel drive launches at the strip viable with stock tires?

or will it just spin thru half track anyway


Will it gain me anything over a 4x4 launch ?

02/12 f250 CC SB Lariat Ultimate 4x4
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05/05 4x4 EB Excursion -gone but not forgotten SCT enabled 1/8th 8.9 seconds....
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post #2 of 14 (permalink) Old 11-10-2005, 09:08 PM
 
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John,

The benefit you will gain from the 4WD launch is the lower 60 ft times. Basically getting the thing moving. It would be hard for me to see you cutting a better 60 ft in 2wd no matter what the air pressure was:shrug:

4wd will take away from your trap speed but still not even enough for any of the big guys (11 sec 1/4's) to get away from it. Especially NOT on an 1/8 which is all RT and 60 FT IMO.:
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post #3 of 14 (permalink) Old 11-25-2005, 03:06 PM
 
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I would say lowering air pressure, and trying to find a stickier tire. I would think that running in 4wd would eat enough power to hurt on the big end instead of driving it off the line(instead of launching like john force)
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post #4 of 14 (permalink) Old 11-25-2005, 06:38 PM
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2WD launches are very difficult to do with stock parts. For starters try launching at about 1600 rpm's and work your way up from there till you get excessive tire spin and then back off a little. Don't let to much air out of the tires because that will cause the tires to cup up in the middle and loose traction faster. Also look on ebay from time to time and see if you can find some used slicks that will help alot. You can also clamp the the leaf springs in front of the rear tires to help stop spring wrap. This should be a good start and maybe someone else has some more ideas.

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post #5 of 14 (permalink) Old 11-25-2005, 06:54 PM
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The best I ever managed on street tires in 2wd was a 2.0 60'.
On an 1/8th mile track...keep it in 4X4.
On a 1/4 mile track...I can usually catch a similarly equipped 4X4....even though they kill me off the line.
All that extra driveline really eats up a lot on the top end.
Once you get to 11 second trucks though...who cares...we ain't catching none of em...

BTW...I'm selling my 16X8 aluminum wheels with MT ET Street 28/12.50/16 tires.
Make me an offer if you're interested...they have 3 passes on them and 1 big burnout before I got them.
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post #6 of 14 (permalink) Old 11-25-2005, 09:14 PM
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I got a 12-pack in the fridge and one in hand. Will that do? Name the price.

1997 Dodge 2500 CUMMINS 5 spd 4x4, 16* timing, #10 plate, pump mods that make it go real hard, 3gsk, South Bend Con FE, studded and o-ringed, AEM Workhorse intake, Straight 4 inch exhaust into 6" Aussie tip Black powder coated stacks, modified turbo non wastegated now and the two big cowbells are now residing on my Goat. Smokes like a freight train and "Hey I got a goat finally!!!!!"

Now my wife's:2006 F-150 Crewcab XLT 4.6L V8 with every option available.
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post #7 of 14 (permalink) Old 11-25-2005, 09:34 PM
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$175.00
I'll be headed north to Fort Worth then northwest through Amarillo, Dumas, Dalhart, etc headed to New Mexico on Monday if someone lives that way and wants to meet up and pick em up....otherwise shipping is extra
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post #8 of 14 (permalink) Old 11-26-2005, 03:03 PM
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Unbroken - What kind of 60' did you pull with the slicks ? And with the smaller (28") dia. tire....... how did it affect your gearing ? I would think it'd be better. :shrug:

My dilema now is finding 17" slicks/cheaters to fit the '05. Haven't found anything taller than 28". Might have to go custom 16" wheels with no offset to clear the calipers. I'm stumped on this one.

But I have until Spring to work it out. :

'05 Regular Cab Shortbox 2wd
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post #9 of 14 (permalink) Old 11-26-2005, 03:26 PM
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Worked it down to a 1.8 60'....
The 28's short shifted quite a bit...but I went in with the SCT and changed the tire size to fix it....but my trans gave up before I could get it completly straightened out.
It's kinda nice to take my laptop to the track and make little changes like that between runs.


I thought 16's would still fit the back axle?
Only the front brakes are bigger right?
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post #10 of 14 (permalink) Old 11-26-2005, 04:46 PM
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Actually, I never tried putting 16"s on the rear. Hmmm???

Wonder if they'll fit ???

And would just rear slicks be enough ?? (with traction bars of coarse)

'05 Regular Cab Shortbox 2wd
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