RwHp numbers

[blueeyeddevil]

I see you guys talking about your E.T.s alot, but what power you guys putting down, and with what combos.

 

[Quick6'n'-K.C.]

A buddy of mine in a stock long block intake never removed, put down 390 horse with a turbo 400 trans.

Went 10.94 at 122mph on a 1.55 sixty foot.

Full weight car, nothing cut up

His car consists of a 6152 precision turbo, home made front mount, 60lb injectors, neil chance convertor, 3 inch downpipe, ls1 translator. Rjc powerplate

BW:smile:

 

[cuda6pak]

I made 352rwhp and 445rwtq. Best 1/8th was 8.0@90.3 with a 1.98 60ft.

Girlded and studded 109, TE44@23-24psi, 208 cam, dutt neck, art carr trans and 3000 stall, ls1 translator, mild ported heads/intake, hooker aerochamber exhaust.

 

[Tony Shoaff]

Put your money with your dreams and I will sell you a direct bolt in. 10.30@129mph. All day.

 

[aze12677]

o

 

[blueeyeddevil]

Wow, Am I wrong but aren't those numbers really low for those times. I would think a car would have to put down around 500rwhp to get into the high tens. These cars weigh around 3500 right? What kinda torque are you putting down then?

 

[Tony Shoaff]

Numbers

My car on a chassis dyno did 490 rwhp @ 472ft lbs of torque. 25lbs of boost.
It weighs 3250 without me in it.

 

[blueeyeddevil]

I guess with the hp robbing auto thats above 650 at the crank? Wow it will take a lot to crack 500 at the wheels I am thinking then. What makes are cars so fast then? Just good traction, and wide powerband?

 

[Tony Shoaff]

RWhp

The turbo and the tune.

 

[Quick6'n'-K.C.]

Wow, Am I wrong but aren't those numbers really low for those times. I would think a car would have to put down around 500rwhp to get into the high tens. These cars weigh around 3500 right? What kinda torque are you putting down then?

No not really, just depends on how efficient the torque convertor is, and how the car is capable of putting the horsepower to the ground.

No sense in having too much power if you cant use it

 

[Quick6'n'-K.C.]

I guess with the hp robbing auto thats above 650 at the crank? Wow it will take a lot to crack 500 at the wheels I am thinking then. What makes are cars so fast then? Just good traction, and wide powerband?

The transmissions dont rob any more power than other automatics.

What makes them quick is torque, what makes them fast is horsepower.

My daily driver makes close to 450 horse and 600 foot pounds at the rear tire, but it is slower than mid 11s

It just depends on the car, tune, weight, and sticking it at the track.

HTH
BW

 

[blueeyeddevil]

I mean in comparison to a manual, as far as power robbing, not other autos. I am comparing my friends 04 cobra, (6speed manual) most run tens and put down alot more power than 500rwhp. (not that he hooks up very well at all any way) Just seems low thats all. woulda thought most of you were putting out around 550-600 at the tires to be in the 10s. I am new to the buick world, but again I guess I am looking at cars that weigh at least 500lbs more.

 

[Quick6'n'-K.C.]

I believe the 03-04 cobras dont make usuable horsepower, its more peak horsepower that your seeing, 500 horsepower and it runs mid 11's ???

Its the peak power the decieves you, its not always there at 5800 rpm, if it made 500 hp from 3500 to 6000, then it would ET alot better than the peak number cobra.

So yes, the buick has a more broad hp and tq range, but not really a great peak hp like these newer motors, but it carries the car down the track.

I found a dyno sheet on a modded 03-04 cobra with a blower, at 3000 rpm it makes 300 horse at 5800 it makes 500 horse. 200 HP LOSS down low with a blower car????

On the cobra, anything below 4000 rpm it really doesnt come close to making peak power.
On a buick, normally it has a nice flat hp line and the torque comes in really soon.
See photos for comparison.

Modded "peak" cobra
Nothing special te44 msd 50s stock turbo elbow "broad" brick

BW

 

[blueeyeddevil]

Before port: (2.75 upper only)
460whp/483wtq SAE
11.7 @ 120mph (1.84 60ft)

After stage4 port: (2.8 upper/ 4# lower)
522whp/528wtq SAE
Best 1/4 et 10.94 @ 122.6
Best 1/4 trap 11.3 @ 127.8
Best 1/8 et 7.0 @ 103mph

This is from a cobra forum, and basically what I am talking about.(pretty much average for a cobra) I am thinking the GN just hooks up better or makes more power across the rpm range? I know these things leave the line like a bull. even playing with hp calculators you guys are fast.

P.S. This was posted before I saw your graph, but it gave me my answer.

 

[blueeyeddevil]

Cool thanks man, thats what I was talking about by wide power band. So in a quick summary, cobra=peak high numbers, bad traction=Mediocre times/ buick=good broad power band through the rpms, great traction= fast. :biggrin: I have been in the mustang world to long.

 

[Quick6'n'-K.C.]

I think you finally caught on! :biggrin:

Comparing the 2 cars, the cobras peak is more, but since its not there down low, that kinda sucks hugh?
No wonder they werent turbo'd!

Boooost shift, booooost shift, booooooost shift, booooooooooost shift.

The buicks arent the fastest, but from 3500 to 6500 with a good set of heads and decent cam, they can make great power and really arent to bad to work on.

Take it easy

BW

 

[Quick6'n'-K.C.]

From what i read on your first post here, i knew you had not seen the graphs

Its GOOOD

BW

 

[Pablo]

Dyno numbers are so pointless

there are so many factors involved in a dyno number that dont affect ET anywhere near as much. Things like what type of dyno, tire pressure, torque converter locked or unlocked (and this is HUGE!), what kind of torque converter, etc

A dyno is an ok tool to do some consistent back to back testing to see if changes you make show up as power. But as a comparison to other cars... more often than not they are pointless.

The only dyno that matters is the racetrack. Thats why some people call it God's dyno. You can put down 1000 hp on a dyno with a supra and it wont matter if you get smoked by a 500 hp turbo buick.

 

[bison]

I mean in comparison to a manual, as far as power robbing, not other autos. I am comparing my friends 04 cobra, (6speed manual) most run tens and put down alot more power than 500rwhp. (not that he hooks up very well at all any way) Just seems low thats all. woulda thought most of you were putting out around 550-600 at the tires to be in the 10s. I am new to the buick world, but again I guess I am looking at cars that weigh at least 500lbs more.

Dyno numbers dont mean dick when comparing one type of car to another. My blue car put down 559/706 with a mild iron headed combo. I never got any et's but it was a lot stronger than the black car in my sig. Boost pressures were at 24.5psi on the dyno that day on a 9.0:1 engine. I had it dialed in at 27.5 psi before i pulled it to switch combos. Keep in mind i had a stock MAFS minus one screen, stock ecm with low impedance drivers, p-trim turbo, and a crappy AC converter that i was driving through pretty hard even at 24.5 psi. Slip was around 16% on the dyno before the runs were aborted where power dropped off. 706 ft lbs at the rear wheels. How many Cobras can lay down 706 ft lbs especially through an automatic with a loose converter? The car would have ran very very low 10's with a 1.45 60' at 3600 lbs. With a better converter and more boost it would have put down 620hp even with the p-trim and 650+hp with a q-trim.

 

[JDSfastGN]

Ive only been on a dyno once. I dynoed on a very conservative mustang dyno. It was in my dads 86 GN in the sig. It has gone 124 mph but we have never had any kind of decent tire on it so it runs mid 11s on 1.85 60s. It put down 447 rwhp with the converter locked but no torque reading because they were having problems (mustang dynos derive torque from hp/acceleration as its a set load or something where dynojets read torque then derive hp)