Know that you can find out rear wheel horse power by getting on a dyno, but I use to have a formula and lost it. The formula would allow you to figure RWHP if you knew how much your truck weight was, and your E.T. from the track. Does anyone have this floating around? Thanks.

 

Try this one
http://www.race-cars.net/calculators/et_calculator.html

 

That is so cool, thanks for the link.

 

that formula is 5.825*(weight/horsepower)^(1/3)

 

CAN SOMEONE SOLVE THAT EQUATION FOR HP?

 

If ET = 5.825*(w/hp)^(1/3), then

hp=w/((ET/5.825)^3)

 

1+1=3

 

Hahahah at least all those years in math classes were worth something.

 

According to that calculator, my truck is putting down 272rwhp.

 

Anyone weighed their ECSB 4x4 without a spare or tailgate?

I think my door sticker said 6400 lbs, !spare !tailgate probably gets me down to....6250?
If that's true, at 95 mph trap speed I'm putting out 415 rwhp according to the calculator. Sounds a little generous to me.

Chapman dynoed one of their CST's on a Mustang dyno and got:
326.6 rwhp @ 5300
339.9 rwtq @ 4700
With Radix, ASM headers and cat back. http://www.chapmansupertrucks.com/specs.htm#

Mine should be a little less than that because of the 4wd.

Wow just looked at their FAQ page.....I call BS!!

"Question: How long will it take to convert?

Answer: About 1 week. The SuperCharger programming for the ECU is Vin number specific, this takes about 3 days alone.

Question: The aftermarket part's are cheaper thru mail order?

Your correct but most people forget the cost of installation. ASM has been the leader in fuel injecting hot rod's and has installed Hundred's of SuperCharger's, fuel management and Headers over the past 20 years. Please don't worry ASM can sell you the parts thru mail order if you want to install them yourself. Heck call a buddy and buy the beer! It's only a 18hr install! (if you have done several before) Mr Murphy's law may cause some delay's as well. 8 )"


18 hours if I had one hand tied behind my back and was blindfolded...I thought the good shops could do it in like 5 or 6 hours!!