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Need some drag racing advice

 
Old 01-27-2019, 09:11 PM
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Launching in 4wd @ 2700-2900rpm should bring your 60' times to 1.9x which should also bring your times sub 14 seconds, easily 13.8's,
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Old 01-27-2019, 09:13 PM
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4 high, rear diff locked, leave as high as possible.

And someone else will always be faster.
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Old 01-27-2019, 09:33 PM
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Originally Posted by 5.Bro View Post
Need more info as well. What was the DA? Temperature? Etc.
I'm not that serious but I'm a pilot. DA is around sea level elevation around 70', temp around 60 F, high humidity. Track very slick.

I'm gonna go out next Friday night and try the suggestions, 4x4, diff lock, see if I can't get into the 13s.
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Old 01-27-2019, 11:22 PM
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So I watched a youtube video recently of a guy with a 5.0 powered '18 f150. The more he stalled the converter against the brakes, the slower the truck went. He netted better times flashing the converter from just over idle. This is probably somewhat of a disagreement with what other posters have stated, and I'm not advocating for one method or the other. Just saying what happened. This was a tuned 5.0 with a stock converter. First pass was a 13.85ish, and he made two more passes and times went up to a 13.95 or something as he added more stall rpm's.

It could be a result of heat in the transmission perhaps, or other factors, but that's what took place regarding et's and flashing versus stalling the stock converter.

these guys sort of make the same point

here's the youtube video

Last edited by rojizostang; 01-27-2019 at 11:27 PM.
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Old 01-28-2019, 12:33 AM
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One thing I can say...and its a bit obvious, is to make sure stability control / traction control is off and the truck is in sport mode. I've forgotten to turn those off, and it really kills times.
Heat soak is a concern between runs, so get that hood open after each run and let it really try and cool off. 4wd is a must, and will really lower that 60ft. I personally don't use the locker, as I'm concerned about parts breakage due to Ford's design, but it seems plenty of people use it without issue. I don't really brake boost the truck too much either, as again....concerned about braking **** due to my blower.


Practice and have fun!

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Old 01-28-2019, 12:31 PM
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traction control off, launch in 4wd high, put the tires at regular road going PSI, and reaction time doesn't matter.
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Old 01-28-2019, 04:01 PM
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Tried that set up on the street and it seems to work well. Back to the strip on Friday..
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Old 01-28-2019, 04:17 PM
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Originally Posted by juanvaldez
Tried that set up on the street and it seems to work well. Back to the strip on Friday..
Good luck. Be safe!
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Old 01-30-2019, 11:50 PM
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Originally Posted by BadCon View Post
One thing I can say...and its a bit obvious, is to make sure stability control / traction control is off and the truck is in sport mode. I've forgotten to turn those off, and it really kills times.
Heat soak is a concern between runs, so get that hood open after each run and let it really try and cool off. 4wd is a must, and will really lower that 60ft. I personally don't use the locker, as I'm concerned about parts breakage due to Ford's design, but it seems plenty of people use it without issue. I don't really brake boost the truck too much either, as again....concerned about braking **** due to my blower.


Practice and have fun!
Are you leaving in 4H for the full run or back to 2WD as X speed?
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Old 01-30-2019, 11:52 PM
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Originally Posted by Vet Class View Post
Are you leaving in 4H for the full run or back to 2WD as X speed?
Doesnt matter, it wonít switch under load. If you want to do it early so you donít have to remember to switch before you turn off the track thatís fine, but itíll be 4H the whole run whether you want it to or not.
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