Need help with whp estimates........ - 3000GT/Stealth International Message Center

wishIwasFast · 09-08-2008, 12:47 PM

I'm trying to figure out the whp of our TT. We were guessing at 12.5psi it was around 330awhp. The car ran a 12.443@109.89 at 12.5psi with the mods below. I'm getting accused of "downplaying the numbers" in a certain forum because I claimed 330awhp-340awhp at 12.5/14psi. The stealth beat an '03 cobra making a minimum of 380rwhp from a roll 3 times and the mustang guys can't accept it I guess. (See drag racing forum for video). A guy on there who used to own a TT 3S but now has a cobra keeps trying to tell me that DR-500 cars make 350+awhp at under 14psi, which I find hard to believe......not on pump gas anyways.

Using 3 different formulas that rely on ET, trap, and weight to calculate hp, I have some numbers. These are CRANK hp numbers. Based on 12.5psi.

Hale formula:391-400
LRT:409-495
Fox:414-487

Adjusted to whp based on 23% drivetrain loss.
Hale:302-308
LRT:315-382
Fox:319-375

These numbers are all over the place though. Anyone have a guess?

Melissa

lawdogg · 09-08-2008, 12:52 PM

Stealth 316 - Formulas for 1/4 mile ET & mph vs. hp & wgt

Chart at the bottom does a pretty good job. You're probably around mid-upper 300's at the wheels.

You have to remember that it isn't the peak # that determines who has more power, it's the area under the curve ... and those DR500s spool pretty quickly.

Of course the Cobra has insta-spool with the supercharger, so who knows. It can come down to gearing.

Also, when those 03-04 Cobra guys lose, it's just like when a bike loses, they just can't accept it.

donniekak · 09-08-2008, 12:52 PM

Wow thats funny, finally people are saying we underestimate our power. Check out the dyno collection thread it shows power with many different setups. I think your right on with 330-340 myself.

wishIwasFast · 09-08-2008, 12:55 PM

Yeah, I used the 316 site to get my estimates. Note, our TT has a DR-500 rear turbo and a 17g front turbo. But the guy who called me out used to own a TT, so he isn't a newb to 3Ses. But he thinks the stealth is at 350awhp. I say NO WAY at 12.5psi. MAYBE at 14.........

lawdogg · 09-08-2008, 12:59 PM

Oh, I thought you ran at 15psi. Oh well. Yeah if you ran him at 12.5 psi you'd be mid-low 300's at the wheels. You can remind him that it may have been your driver mod.

wishIwasFast · 09-08-2008, 01:01 PM

I knew I wasn't too far off with 330awhp at 12.5psi..........

donniekak · 09-08-2008, 01:31 PM

I went to that forum and read the thread. They beat that guy up about driving. How the hell do you drive bad in a roll race?

wishIwasFast · 09-08-2008, 01:35 PM

The guy who drove the mustang is a very good friend of ours. It isn't his car, he has a '91 300ZX TT. The cobra belongs to our other friend. It just pisses me off that the stealth won and I still have to defend it, like it's some lesser car that just got lucky.........3 times in a row.........

lawdogg · 09-08-2008, 01:39 PM

Quote:

Originally Posted by wishIwasFast

The guy who drove the mustang is a very good friend of ours. It isn't his car, he has a '91 300ZX TT. The cobra belongs to our other friend. It just pisses me off that the stealth won and I still have to defend it, like it's some lesser car that just got lucky.........3 times in a row.........

Get used to it.

Welcome to the world of 3/S ownership.

wishIwasFast · 09-08-2008, 01:44 PM

I know......... We've had 3 Stealths over the last 7 years. Even had all 3 at one time. This was the closest race yet with any car. The 300ZX lost 2 times in a row from 15-140. That was in the '95 TT also, but back when it had DR-500s at 11.5psi. The ZX was at 14psi.

09-08-2008, 12:47 PM	#1 (permalink)
wishIwasFast Official 3/S Fanatic Join Date: Aug 2003 Location: Richmond, MN Drives: 95 TT, 96 R/T Trader Rating: (1)	Need help with whp estimates........ I'm trying to figure out the whp of our TT. We were guessing at 12.5psi it was around 330awhp. The car ran a 12.443@109.89 at 12.5psi with the mods below. I'm getting accused of "downplaying the numbers" in a certain forum because I claimed 330awhp-340awhp at 12.5/14psi. The stealth beat an '03 cobra making a minimum of 380rwhp from a roll 3 times and the mustang guys can't accept it I guess. (See drag racing forum for video). A guy on there who used to own a TT 3S but now has a cobra keeps trying to tell me that DR-500 cars make 350+awhp at under 14psi, which I find hard to believe......not on pump gas anyways. Using 3 different formulas that rely on ET, trap, and weight to calculate hp, I have some numbers. These are CRANK hp numbers. Based on 12.5psi. Hale formula:391-400 LRT:409-495 Fox:414-487 Adjusted to whp based on 23% drivetrain loss. Hale:302-308 LRT:315-382 Fox:319-375 These numbers are all over the place though. Anyone have a guess? Melissa __________________ Melissa(me):Symphonic Silver Metallic '96 Stealth R/T (#75 of 115/1 of 8 in Silver) K&N FIPK, custom cat-back, 3SX crank pulley, 18x9 NS Racing rims John(husband):Pearl Yellow '95 Stealth TT ~12.43@109.89 (stock clutch/cat-back, 12.5psi) 13g/17g turbo combo, wideband 02 sensor/gauge, ARC2, 550cc injectors, HKS intercoolers, HKS boost controller, Stillen DP, lightweight flywheel, Greddy type S BOV, hotwired 255lph fuel pump, 3SX crank pulley Kutani Red Pearl '91 Stealth TT BPU-SOLD

09-08-2008, 12:52 PM	#2 (permalink)
lawdogg Here for the tuna. Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (65)	Re: Need help with whp estimates........ Stealth 316 - Formulas for 1/4 mile ET & mph vs. hp & wgt Chart at the bottom does a pretty good job. You're probably around mid-upper 300's at the wheels. You have to remember that it isn't the peak # that determines who has more power, it's the area under the curve ... and those DR500s spool pretty quickly. Of course the Cobra has insta-spool with the supercharger, so who knows. It can come down to gearing. Also, when those 03-04 Cobra guys lose, it's just like when a bike loses, they just can't accept it. __________________ 94 VR-4: 11.8 @ 116, 17psi, pump, 13Ts

09-08-2008, 12:52 PM	#3 (permalink)
donniekak Forum user Join Date: Feb 2008 Location: surprise az Drives: 92rt/tt Trader Rating: (5)	Re: Need help with whp estimates........ Wow thats funny, finally people are saying we underestimate our power. Check out the dyno collection thread it shows power with many different setups. I think your right on with 330-340 myself.

09-08-2008, 12:55 PM	#4 (permalink)
wishIwasFast Official 3/S Fanatic Join Date: Aug 2003 Location: Richmond, MN Drives: 95 TT, 96 R/T Trader Rating: (1)	Re: Need help with whp estimates........ Yeah, I used the 316 site to get my estimates. Note, our TT has a DR-500 rear turbo and a 17g front turbo. But the guy who called me out used to own a TT, so he isn't a newb to 3Ses. But he thinks the stealth is at 350awhp. I say NO WAY at 12.5psi. MAYBE at 14.........

09-08-2008, 12:59 PM	#5 (permalink)
lawdogg Here for the tuna. Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (65)	Re: Need help with whp estimates........ Oh, I thought you ran at 15psi. Oh well. Yeah if you ran him at 12.5 psi you'd be mid-low 300's at the wheels. You can remind him that it may have been your driver mod.

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09-08-2008, 01:01 PM	#6 (permalink)
wishIwasFast Official 3/S Fanatic Join Date: Aug 2003 Location: Richmond, MN Drives: 95 TT, 96 R/T Trader Rating: (1)	Re: Need help with whp estimates........ I knew I wasn't too far off with 330awhp at 12.5psi..........

09-08-2008, 01:31 PM	#7 (permalink)
donniekak Forum user Join Date: Feb 2008 Location: surprise az Drives: 92rt/tt Trader Rating: (5)	Re: Need help with whp estimates........ I went to that forum and read the thread. They beat that guy up about driving. How the hell do you drive bad in a roll race?

09-08-2008, 01:35 PM	#8 (permalink)
wishIwasFast Official 3/S Fanatic Join Date: Aug 2003 Location: Richmond, MN Drives: 95 TT, 96 R/T Trader Rating: (1)	Re: Need help with whp estimates........ The guy who drove the mustang is a very good friend of ours. It isn't his car, he has a '91 300ZX TT. The cobra belongs to our other friend. It just pisses me off that the stealth won and I still have to defend it, like it's some lesser car that just got lucky.........3 times in a row.........

09-08-2008, 01:44 PM	#10 (permalink)
wishIwasFast Official 3/S Fanatic Join Date: Aug 2003 Location: Richmond, MN Drives: 95 TT, 96 R/T Trader Rating: (1)	Re: Need help with whp estimates........ I know......... We've had 3 Stealths over the last 7 years. Even had all 3 at one time. This was the closest race yet with any car. The 300ZX lost 2 times in a row from 15-140. That was in the '95 TT also, but back when it had DR-500s at 11.5psi. The ZX was at 14psi.