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Took my truck down the 1/4 mile

thetruck454

By thetruck454
in Engines & Drivetrain

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thetruck454 Enthusiast

thetruck454

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I did a pre-blower run with the truck tonight, gotta figure out my dollars per tenth of a second. Only "performance" mod was the cat back. I left everything in the truck including my tools, fire extinguisher, etc just over 1/2 a tank of fuel. I figured the weight of the rolling toneau cover and tools should about cancel out the small hp increase from the cat-back. I launched in 4HI and switched to 2wd before the 1-2 shift. I did a couple runs trying to break torque, but there must be some safety built in because it would just bog and wait then slowly accelerate. Those runs were 14.7xx and 14.6xx. The final run I did no break torquing and just hit the gas after the split second I let off the break. In all three runs I hit the speed limiter, kinda funny a stock truck hits that in the 1/4 mile. The final run us below, I'm car #715 in the left lane.

 

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thetruck454 Enthusiast

thetruck454

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I tried both on and off, it doesn't help with bogging from the two pedal overlap. The final run when I just nailed it, I did have tc off though.

Jon A Senior Enthusiast

Jon A

Posted
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Yes, it's in the tune. With the right tune you can brake torque it up to ~2500 RPM and greatly improve your launch. Nice time though, congrats!

emeryz28 Enthusiast

emeryz28

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14.0 in a stock truck that isn't meant to be a performance truck (Lightning etc) is just silly!

thetruck454 Enthusiast

thetruck454

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14.0 in a stock truck that isn't meant to be a performance truck (Lightning etc) is just silly!

 

 

I know, I had a couple people ask me what I had done to the truck, like tune, cia, etc. I told them the catback and all the rest were astetics. I told my brother I wanted to get into the 12's in street attire with the blower and I would pulley down till that happened. From the stock time, I don't think I'll have an issue with low boost breaking into the 12's.

UplandPa Enthusiast

UplandPa

Posted
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Dang, 14.0 in a stock 4WD truck! I can remember when that was the time of most stock muscle cars. Very nice!

  • 2 weeks later...
GRN69CHV Enthusiast

GRN69CHV

Posted
Posted

That's moving right along. Truck picked up just shy of 20mph in the back half, which is darn good, probably would have surpassed that number if top speed was not limited. On the negative side, track is only 92 feet above sea level, don't know about the day you ran, but DA for 5/22/16 is listed at 297', that's pretty good air. As for getting into the 12's. wide variance dropping to 12.00 vs 12.95. Gonna be tough to get much lower than a 1.85-1.90 60' time (what are you running for tires?). For comparison, my '69 Chevelle was driven to the track on MT Drag Radials. As I added power, the 60' time got progressively worse instead of better. First couple years with a 454 putting out about 550HP car would hit 1.65-1.76 60' times and run 11.60-11.70/115-116 in the 1/4. Eventually we dropped in a 540" motor, dyno'd at 705HP. It was like driving on a wet road trying to get the car moving. 60' times increased to 1.85-2.00, was horrible. Yes the car did ET lower and MPH higher, hitting 11.20-30 at 124-125 mph, but keep in mind it took 700HP to get there. Keep in mind, this was a fully optioned street cruiser with factory A/C, all stock body, car weighed 4070# with driver. Will be interesting to see where you go with this. Two schools of thought getting down the track, one is blast it out the hole, other is run it out the back door. First takes suspension, tires and converter, the later takes raw HP.

thetruck454 Enthusiast

thetruck454

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I'm running 275/55r20 Grabber UHP's. While stock I still couldn't gain traction in 2wd launches, but on the street it stuck much better on part throttle. I'm hoping even with the blower I can still hook in a 4x4 launch and shift out on the 1-2 shift like I did stock.

jvanwinkle2 Enthusiast

jvanwinkle2

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Damn good times. Think your goal of getting into the 12s with the charger and different tires is definitely possible.

GRN69CHV Enthusiast

GRN69CHV

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Running it through the calculators, the 1/8 mile and 1/4 mile ET/MPH incrementals are correct for a 14.09/96.9 ET/MPH. Assuming a race weight of 5800#, motor was putting out right at 400HP to net the 14.09/96.9. You'll need to boost power to 525HP to hit a 12.90/105MPH. More important, will need to shave .80 off the 1/8 mile time with .15-.20 coming off the 60' time. I know you said you wanted to run it in pure street trim (tools, tonneau, etc.), but JMHO, running a truck down the end of track at WOT is different than trying to launch a truck at the beginning of the track. Dropping weight doesn't show up as much in MPH as it does ET.

thetruck454 Enthusiast

thetruck454

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I Just got on the scales at the local dump and inafter the blower was put on in "Street trim" and with a full tank of gas plus me I'm just over 6,000lbs. Still tuning back and fourth with Black Bear, but I'm hopeful. I don't want to get into a cam swap or the LT4 HPFP/injectors so we'll see how much room the stock fuel system has for more boost if I need it. I'd rather not push it to the end and then 60,000 miles later when things are more worn in so the fuel system is functioning at 95% I go lean and pop goes the motor.

redhot1.4 Enthusiast

redhot1.4

Posted
Posted

I Just got on the scales at the local dump and inafter the blower was put on in "Street trim" and with a full tank of gas plus me I'm just over 6,000lbs. Still tuning back and fourth with Black Bear, but I'm hopeful. I don't want to get into a cam swap or the LT4 HPFP/injectors so we'll see how much room the stock fuel system has for more boost if I need it. I'd rather not push it to the end and then 60,000 miles later when things are more worn in so the fuel system is functioning at 95% I go lean and pop goes the motor.

I think you will surpass 12.90

I have a friend that had a new ford raptor, with the roush supercharger

All the goodies longtubes, tune, you name it .. 13.20 &13.30 the best he saw

he actually sold that raptor

And got another eco boost and did a few bolt ons and nailed 13.10

He has had 3 eco boost

12s are in your future sir

gm 6.2 are a beast

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