Red, when was this match up with the Hemis? I wish i could have been there. Gainesville is a nice hooking track. When are you going to start doing more mods to your truck? Its got some real potential with the drivetrain its got in a base model. Hell, you want to trade?

 

those calculators dont take into affect gearing, traction, tq managment mod, if you have an aluminum driveshaft and awhole bunch of other stuff.

 

hemi777,

1. Was that aluminum driveshaft an option that you could pick from to build a truck or does it just come with the LB truck? How did you get it is what I am really asking. I know that you didn't buy it aftermarket with only spending $100.

2. How much weight do you think you are saving by having the aluminum driveshaft instead of the steal one? Is it a lot or not really noticeable?

 

Those calculators are just estimates of how much hp it takes at the wheels. All the gears and aluminum shaft mean is more of the engines hp is getting to the ground. Basicaly he is loosing less hp through the drivetrain than someone with a steel shaft, higher gears, and 20s. So in essence those things are taken into account. It still means @ 365rwhp is what it takes to run 13.7s with 4800lbs.

 

snake eater that was a good point about lotsofn, puts things in perspective, but wasnt lotsofn at least running a set of drag radials if not slicks, h777 is using stock tires, and as far as h777 having 20 years of driving experience yes that is alot but its an automatic you cant cut that much time off just with driver experience with a auto tranny especially with a stock torque converter, I dont doubt the times and right now i think he just has an amazing factory freak, but these were just the points that popped into my head after seeing this, either way great times h777 and keep em coming

 

i wish our chevys had a tq mod so we could just unplug somethin and knock off 4 tenths. i bet you'd see some low to mid 14's with the RCSB at just 230rwhp stock. Then intake, exhaust, and if your running the 3.73's you could possibly be in the 13's.

 

What is it with all these HP calculators. **** that, hit the DYNO!

 

Exactly, but even numbers aren't always accurate as all dynos skew numbers and will read different with the same vehicle on the same day. And from dyno to dyno.

HP calc's dont take into account drivetrain losses, converter inefficiency, low gear ratios, etc. Take this for instance...I used to have a big *** '88 TownCar that would run 8.4-8.7 in the low to mid 80mph area 1/8th mi times...it only laid down 320rwhp/390rwtq on a dyno with 24lbs/hr 100% IDC static injectors. It weighed ~4200lbs also. That was running through a loose inefficient PI Stallion converter and 4.10:1 gears.

With that weight and HP it "by the calculators" would equate to ~13.9@97mph when in reality would be turning 13.3@106mph or so.

With the time it would pull (13.3) the hp "by the calculators" would be

Using the ET method, I come up with 373 horsepower
Using the Speed method, I come up with 409 horsepower

So that throws all that calculator crap out the window as we're talking HUGE descripencies (sp?) between what my car actually laid down versus what the calculators say. We're talking between 50 and 90 rear wheel hp difference!

 

with my different gears, my mph and 1/4 mile time should be a bit better.

my third gear will pull LOTS harder then 777's, we need a track date.

 

Lotsofn also has a 3000 stall converter.