age

just curious guys, but how much horse you think I'm pulling if I'm doing 106mph with 3.27 gears and a T-5 behind a 350 in a Camaro that weighs 3470lbs WITH a 190lb driver? thanks!

Adam62083

106? ****. Thats pretty damn fast. Thats probably what, a low 13?

I hit a 14.0 @ 97.5...

So I'd guess a 13.1-13.3 ish could hit a 106mph. Hmm. I'm really kinda shooting in the dark here. You need an ET to go with your trap speed. However, I would guess youve got over 300 on the ground, so 330-350 on the crank.

Just a guess though.

Nic

With the right suspension, you can run 12's with a 106 mph trap speed. My guess in a 3500 lb car would be about 350 - 370 at the flywheel.

TBurke

I hit 105 in a 3650lb Iroc in 13.07.

AlkyIROC

I'm assuming 3470 is with the driver so that's the total weight going down the track.

3470 pound car running 106 mph = 322.55 RWHP
With a proper setup, it should be running high 12's.

I'm also assuming you ran in Mission so you are either running at or sometimes below sea level air conditions.

GregWestphal

iTrader: (1)

I think you mean engine horsepower. I've run 106-106.5 mph in my 3600 lb (with me) IROC, and I just dyno'd at 279 rwhp. Since he has a manual and mine's and automatic, he'll have less drivetrain loss, which means that my estimated 20% loss give me almost 350 engine hp while his estimatd 15% loss (assuming 275 rwhp) gives 323 engine hp. Most of the common formulas for calculating hp from weight and trap speed or e.t. give engine hp, and I've seen this backed up by numerous 3rd and 4th-gens that have dyno numbers and timeslips.

NJ SPEEDER

time to go suspension shopping
that is definately a 12second mph. what was your 60' ? if you can get a 1.75 or better you will be golden

later
tim

AlkyIROC

My formulas are all racing formulas. They're based on a power to weight ratio. It takes so much power to the ground to move so much weight so fast. I stand on my calculations.

It also has a lot to do with weather conditions gearing and weight transfer. While his street car may be able to run low 12's and equally heavy Stock Eliminator car is probably in the high 10's. There's not much difference allowed in the engine but cam choice (lift restricted), gearing and weight distribution makes these cars a lot faster than a street version that weighs the same.

Since we only know his speed and not his ET we don't know how good his gearing is. If it was geared to max out at the 1/4 mile then the mph is good. If the gearing needs to be adjusted so that the engine maxes out at the 1/4 mile then the mph will decrease. I've seen 12.00 cars running between 104 and 117 mph. The 117 mph shows more HP but they both run the same ET because of gearing.

age

hey guys, thanks for the replies... my et's were about a 13.4... but mind you that it was my first time drag racing, and I was riding on nearly bald 265/50/16 BFG Radials.

Stephen, yea.. I was at Mission Raceway... I'm not sure about how altitude affects 1/4 mile performance. So, I'm just taking my numbers at face value..

NJ Speeder: I can't remember my 60's, but both that and my R/Ts were BAD

oh yea.. and I have the stock final drive gear ratio (3.27s.. or 3.23s?). Which leads me to my other question... if going to 3.42s or 3.73s would INCREASE my mph (does it? I'm not sure), then how is the trap speed an indication of hp?

Obviously I'm new to the concepts of drag racing.. so please forgive me if I'm asking dumb questions. thanks guys!

Basett_Racing

First of all, R/T has absolutely nothing to with ET or MPH. The clock starts timing E/T when the car actually moves, so your R/T could be a perfect .500 or 20 mins and your E/T would still be 13.40 That's one of the most common myths about drag racing, and like you said, you're new to it, so its not fault. One other thing you may not know is when you're trying to get you're best ET, stage as shallow as you possibly can. When you turn on the "prestage" light, bump the car up very slowly and the instant you see the "stage" light come on STOP! don't go up any further. A lot of people think going up further makes the track shorter, but it actually hurts your ET a little. Staging shallow actually gives a slight "running start" before the clock starts. But as far your car goes, that is pretty quick. Do a little suspension work, and get some slicks and that baby be 12 bound all day long. My brother's truck runs 12.40's at 106, so you definetly got enough MPH to get you there, you just gotta get it hooked up.