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1/4 mile time/horsepower/weight estimates?

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Old Sep 8, 2014 | 03:17 PM
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1/4 mile time/horsepower/weight estimates?

hi i have looked around a bit but having a hard time finding numbers i can believe or relate too, the strip here is closed until next summer and i just got my new motor broke in so im curious to what it 'could run' ( in a perfect world where my t5 wont explode)
car is a 83 z28 5spd with 3.08s in back, aluminum centerlines, t top with manual windows, basic stereo, pretty basic interior( aproximate my weight?)

motor is a 357(.040 350) with comp 282 roller cam/ howards lifters, eagle crank and rods,peed pro pistons,9.8:1 compression,summit 200/64cc aluminum heads loaded with good valvetrain(supposed to be a chinese brodix ik200?) summit 750 vac sec carb on a summit dual plane, and 305 manifolds with about 3' of open 2'1/4" pipe (for now, headers and a real exhaust next year) standard dizzy @ 8btdc , 36 degrees total (i think, my machinist set it i broke my light)
all i know for sure is that she is no slouch, and on my 500 mile trip back home while i was breaking in the motor i got 23mpg

if anyone can help me guess my 1/4 mile time, crank/wheel horsepower and curb weight of this car it would be greatly appreciated, thanks
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Old Sep 8, 2014 | 03:22 PM
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Re: 1/4 mile time/horsepower/weight estimates?

oh and i dont know if it matters much but the motor has a 327 balancer on it, and a 305 flywheel, with a mcleod super streetpro organic/ceramic clutch, and the whole works is sittin on solid mounts
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Old Sep 8, 2014 | 09:32 PM
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: 1/4 mile time/horsepower/weight estimates?

Weight? Put the car on a scale with you in it.
HP/torque? Put the car on a dyno.

ET? Give me those two results and I'll give you an estimated ET providing you can get it down the track without the T5 failing.
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Old Sep 9, 2014 | 04:09 PM
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Re: 1/4 mile time/horsepower/weight estimates?

closest wheel dyno is 350 miles away, i dont know where any trucker scales or anything is around here, if the dyno was closer i wouldnt have posted this, if the track was open i wouldnt have posted either, but neither of those things are around or open, cant anyone even give an estimate? i dont know where to begin guessing my weight at, my 85 s/e weighed in at 3650 with me in it, but i had a 'bit' of extra weight in it
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Old Sep 9, 2014 | 09:22 PM
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: 1/4 mile time/horsepower/weight estimates?

Without knowing important data, a guess is 12-14 seconds.
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Old Sep 10, 2014 | 12:28 AM
  #6  
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Re: 1/4 mile time/horsepower/weight estimates?

Well i guess im just guna have to wait, theres only 2 strips, and 1 dyno in my state,just figured with all the third gen owners someone would have an idea what a t top 5 speed aluminum head car would weigh, and maybe i thought someone might have built a fairly similar motor for a reference point, 12-14 seconds pretty broad..
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Old Sep 10, 2014 | 12:46 AM
  #7  
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From: St.Louis, IL
Car: 1988 Camaro
Engine: 377
Transmission: TH350; Circle D 4200 converter
Axle/Gears: Ford 9"
Re: 1/4 mile time/horsepower/weight estimates?

Originally Posted by ak99669
Well i guess im just guna have to wait, theres only 2 strips, and 1 dyno in my state,just figured with all the third gen owners someone would have an idea what a t top 5 speed aluminum head car would weigh, and maybe i thought someone might have built a fairly similar motor for a reference point, 12-14 seconds pretty broad..
You're asking a broad question without giving much information. Power is only a small fraction of why a car goes down the track fast. I'll tell you this much, though - your build is mild, and those gears alone will kill your ET.
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Old Sep 10, 2014 | 12:01 PM
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From: Omro Wisconsin
Car: 86 IROC-Z
Engine: 383 Stroker Vortec
Transmission: 700r4 Built
Axle/Gears: 3:42
I would say 13-13.5 I had a similar set up with 373s but double hump heads and went 13.65 @103


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