Thought it would be interesting to put a thread together for those who have the 'big picture', or at least most of it in regards to the specs of their car.

I think it would be great to see ACTUAL (dyno, not guesswork) HP numbers, either to the wheels or at the crank, race weights and maybe even gearing along with your best E/T's.

I know the calculators do a decent job, but I have seen cars run a lot better than what the calculators say (and some worse).

Just list

RWHP or FWHP
Best E/T
Race Weight
Any other info that may be pertitnent (gearing, tire size etc..)


Who wants to start?!

3755#s 440 E-body w/ driver (track’s digital scales)
- 10.57 @ 126.0 w/ 1.46 60-ft (best of 10.52 @ 126.5 w/ 1.45 60)
- Calculated HP for weight & 126.0 MPH = 586
- Actual engine dyno flywheel ~610 HP & 570 torque (estimating 4% loss from 610 to 586 for full exhaust, alternator, etc.)

BradH, What calculator did you use? The one I have always used here
https://robrobinette.com/et.htm shows you needing 740FWHP to run a 10.5. I used to use the Moroso slide rule , but nobody I knew ever seemed to agree if it was actual RWHP or engine HP you were using to calculate E/T LOL
Seeing your numbers gives me hope that 675+ FWHP in my E body that weights hopefully under 3550 race weight could run a high 9.

340 RWHP
11.87 at 112 mph, 7.54 at 91.2 mph 1/8 mile
3700 lbs. w/ driver
448" wedge N/A w/ 727, 3.91 gear, 26x10 tire

508 RWHP on the local Dynojet chassis dyno
10.40 at 129 mph, 6.62 at 104 mph 1/8 mile
3700 lbs. w/ driver
446" wedge N/A w/ 727, 4.10 gear, 28x10.5 tire

634 RWHP on the same dynojet
9.54 at 140.4 mph, 6.05 at 112.9 mph 1/8 mile
3800 lbs. w/ driver
572" hemi N/A w/ 727, 4.10 gear, 295-65 drag radial (30x10)

72duster #3300 race weight 408stroker Eddie heads.
355rwhp
2800 stall
4.10 gear
28" slick
Ran 11.24@118.78 three days after chassis dyno run.

515 RWHP
10.11@132,6.42@107
3450# w/ driver
392" G3 Hemi, 4.10 gear, 325/50/15 radial

The Moroso one is Crank HP

My wife's car :

535 FWHP
10.65 @ 125
I think the car is right around 2900lbs, but haven't weight it lately.


I know engine dyno's can be a bit off from one another. I know a guy that had his motor dyno'd 2 years ago made 815 hp. Had it freshened up this winter and only made 765 hp on a different dyno but the car still runs the same. The 2nd dyno he used was a brand new calibrated dyno, not sure on the 1st on.

http://www.moparts.org/Tech/tech/index.html

I use the "Quarter Mile HP" calcuator there, which generates #s identical to my Mr. Gasket Hot Rod Calculator. I've always believed it's flywheel HP, since the #s are right in line w/ Dwayne Porter's dyno where my engine was tested the last two times. However, those engine dyno #s could be very different for the same engine run on a different dyno, so they're only relative to THAT dyno, IMO.

You can't estimate HP from ET. I can have a totally hosed 60-ft due to tuning issues, but the car will still MPH pretty much the same. The ET for any given MPH is an indicator of how well the chassis, converter, etc., are sorted out. The MPH tells you how much "oomph!" the engine is making to push a car that weight to the observed MPH. NFW my car made anywhere near 700 HP, regardless of what that HP for ET calculator claims.

Two motors ago..... Dynojet
588hp
3060lbs
408, w5s
727
4.30 gear
9.55@139.99

I always used>
http://www.wallaceracing.com/accel-calc.php
which I assume to be Fly hp

according to my old actual track slips>

3000lbs '69 Cuda, stock 440SP block, 9.8:1, solid cam/2.14 906's, 850DP, 2" f/wells etc.
best was 10.7@124.8 = 484 fwhp

3550lbs '71 Cuda, stock 340, .484/284 hyd. HSD intake 750DP, hdrs etc.
ran a best of 13.29@101 = 300 fwhp

Same car with .590/312 solid, 850DP, lower gears better conv, race hdrs
ran a best of 12.49@107.6 = 360fwhp

all these figures seem reasonable to my motor specs and fwhp numbers.

Only thing with Wallace is that if you get into the very light cars or S/SS cars the numbers seem to go way out.

468 Rear Wheel HP
11.94 ET
113.9 MPH
4125 lbs race weight
3.54 gear
30" tire

I consider the Moroso slide rule to be the default "target" for performance....... IF the dyno numbers aren't BS.

A really well sorted out car can surpass the Moroso slide rule, but most won't.

From my experiences, if you have pretty accurate engine dyno data, you should be able get the hp number on the Moroso slide rule to come within about 5-7% of your corrected hp, based on speed. This assumes you're not running at altitude adjusted tracks.

For example, if you have a 500hp motor(std corrected hp), and put it in a 3600lb race weight car, you should be able to get it to go between 119(465hp) and 121.8(500hp)mph.

If after trying to get the combo sorted out it still won't go at least the 119, and you're not running at an altitude track, you have to start considering the dyno numbers might be a little optimistic.

I put 478 at the tires and went 9.79 first 1/4 pass ever.........3200+ 4.10's and a 29" Hoosier through the muffs...........

Two separate 69 GTXs
Street car 494 RWHP. Pump gas 493 wedge 3960 lbs, 3 speed auto 3.73 gears
10.84 @123.50
Race car 672 RWHP Race 542 Hemi. 3520 lbs, powerglide, 4.56 gears
9.49 @138.50

Directly from the Wallace calculator:

The answers below will be for at sea level and standard pressure/temperature.
(no weather correction).

How many of you have raced at sea level? How many of you know how to make an accurate weather correction? Just checking.

My 428 small block made 615 hp and 565 torque on it's best pull on IMM's dyno. We promptly removed his 1000 CFM Holley 4150, and I bolted on a 950HP when I got home.

I put it in my 3150lb 62 Valiant street car, with an 8" JW converter, low gear set 904, and 3.89 gear with 30" tall ET Streets.

In the last three years, I've only managed 33 engine passes at various tracks and thirteen bottle passes.

Best engine pass is 10.396-128.27 on a hot September afternoon at Indy, and I think the DA was 4500ft.

Best nitrous pass is 9.65-138 at National Trail, again on a eighty degree day, but I'd be lying if I threw out a DA number.

548 rwhp dynojet
3100lbs
9.85 @ 135
428 g3
8" 5300
3.73 28" tire

Motor dynoed 560 HP at the crank

1974 Dodge Dart 2dr 3300lbs at the line.

440 zero decked w/flat top pistons. Ported 915 heads flow 268/207 peak. 11.25:1 Compression

Mopar 590 Solid Cam

850 HP carb, M1 intake, McCandless/ ProParts Headers


727 trans w/ Dynamic 9.5 converter (hi gear flashes 5100) 4.30 gear, 30x9 slicks

Footbrake @ 1800rpm shift at 6200

Ran:

10.77 @ 122.8 mph 1/4

1.47 60 ft
6.80 @ 99.79 1/8th

Thats a very conservative rw dyno
3200/670fwhp = 9.81@137

RWHp: 373hp (N/A)
Best E/T: 10.66 @ 126.4mph
Race Weight: 3839lbs

'69 Charger, 440, OOTB Performer Edelbrock, .590 purple shaft, ~170hp Nitrous.

Tire shake on the dyno. I don't think the numbers are too accurate.