RwHp numbers

[bison]

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)

If you know the torque at rpm you can easily calculate the hp or the other way around. Mine was on a Mustang also.

 

[JDSfastGN]

If you know the torque at rpm you can easily calculate the hp or the other way around. Mine was on a Mustang also.

that was the problem, they couldn't get the rpm to read on the buicks correctly. It was at Conelys, they said it was pretty common for their machine to act up on the buicks.

 

[1chance]

Well i havent tested the GN since the new combo, but i just got a 03 cobra, and it has a few mods. I have a G-tech, and the cobra shows 292rwhp, where my GN use to show 280 ish, but the cobra 60ft is crap in the streets, where is the GN was 1.5-60ft. I ran a best of 12.24/ 116 in cobra, i think i got 12.60 with GNs old combo. I will update as soon as breakin miles are done.

 

[BoostCrzy]

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:

sounds very similar to my setup!.... I put down 408whp and 512wtq on my Mustang Dyno at the shop.... 6152e@ 28lbs through a 2004r(unlocked) and stock Cat-Back!!..........Hooker system is on the way...will post new numbers when it goes on

-Jack

 

[pacecarta]

1320 dyno is the only way to know whats real

dynos vary and realy dont tell the true story
they help for tuning since you can see where you are , make changes and see if it was positive or negative. ,
but if you want to know if you have more than some one else how can you compare your #s on one dyno to #s someone got on someother dyno
want to know what you have take it to strip
, the 1320 foot dyno dont lie or vary as garage dynos do .

then theres plenty of hp calculators on the net, pick one and plug in the cars weight ,the et and mph
heres one
Horsepower Calculator

you cant beat physics and the hp numbers from the calcs are based on pyhsics
takes x hp to move x lbs at x mph at 1320 ft
want more accurate calculate on et and average the two


the looks i get when im asked at the track what my TR puts down and i tell them "600" they always look skeptical then when I explain the car to them they know i talk serious and i wasnt joking ,then they go "thats 600 flywheel right?, not rear wheel" as if I stated an exagerated # to make my car seem better than it is since theres no way their 500hp v8 could be putting down less than my little 6
and hard as it is for most to beleive those calc #s are rear wheel hp (RWHp)#s ,flywheel hp #s with auto trans are typically calculated at +25%

 

[89mulletbird]

my hp and time

My dyno run at 23psi showed 390hp/520 trq (converter locked) and my best run was 12.09 @ 108 (converter unlocked)

 

[FlaBoy]

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.

Another factor could be the cobra's rear-axle setup. If i remember correctly, those cobras have an independent rear suspension, whereas the buicks have the older lower-tech solid/live rear-axle. While the IRS is much better for maintaining traction in turns, and improves the handling a lot compared to the regular live axle mustangs, they're generally not as effective in drag racing. While our solid axle setups are not as "sophisticated" and the snazzy IRS, it does a better job of launching and more efficently putting the available power to the ground during a drag-style launch. At least thats in theory... i've never owned an IRS 'stang, so I could be barking up the wrong tree... I know that in general, a solid axle with trailing arm suspension is easier to launch and track straight, and maintain traction at the strip than most IRS setups.

 

[SloGN]

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.

ditto


i have told people before that a dyno is just a tool.