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HP estimate - needed for car classification

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Old Feb 15, 2012 | 11:42 AM
  #1  
Kevin Vandevenne's Avatar
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From: London ON Canada
Car: 87 IROC
HP estimate - needed for car classification

Hi guys, I know these threads aren't popular, but I'm trying to submit info on my car to a local car club so I can get my car into the proper class for some Time Attack racing this year. Part of the classification is to estimate the hp/TQ of your car if its been modded. I've put down 330hp/400ft/lbs (at wheels) as an estimate as I've never dynoed the car, and I'm just basing it off what I have seen with other builds. Can you let me know if that is in the right ball park? Here are the mods

355
trick flow 23 heads
ported edelbrock lower intake
ported slp runners and matching plenum
LT4 Hot Cam
MSD ignition
10:1
SLP 1 3/4 headers, 3" exhaust
going through a 700R4.

I need to have it tuned this spring after i get the intake on, but is 330/400 a reasonible estimate for this motor? If not, what should i expect?

Thanks
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Old Feb 15, 2012 | 11:44 AM
  #2  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: HP estimate - needed for car classification

330 HP at the flywheel would be closer.
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Old Feb 15, 2012 | 12:36 PM
  #3  
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From: PA
Car: 92 camaro RS
Engine: LSA
Transmission: Magnum F
Axle/Gears: TNT 8.8 wavetrac 3.31
Re: HP estimate - needed for car classification

If you had a stealth ram or mini ram i would say those numbers would be right on you got a big miss match high rpm power cam with low rpm intake set-up, thats close to my original combo but i had a lt4 factory cam fresh 350 took it to the track an ran slower then the factory set-up ordered a mini ram took of the high flo base an slp runners pop-ed on the mini and it was alive put down just under 300whp.
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Old Feb 15, 2012 | 12:43 PM
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: HP estimate - needed for car classification

I think it could do low 300s at the tires. Stock LT1's will do 330 with LT4 hotcam and exhaust bolt ons/tune. TPI is gonna restrict the rpm range abit but it should still support low 300's whp with that cam and those good heads.
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Old Feb 15, 2012 | 12:53 PM
  #5  
Kevin Vandevenne's Avatar
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From: London ON Canada
Car: 87 IROC
Re: HP estimate - needed for car classification

Thx guys. I'm not too concerned with what it actually puts down as long as it runs decent. A lower number just means I'm classed with cars I'm going to have a chance to be competitive with.
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Old Feb 15, 2012 | 08:06 PM
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From: San Antonio TX
Car: 1990 G92 IROC Z Miniram
Engine: 388cu 6.4 Liters
Transmission: G-Force T5
Axle/Gears: 3.73 Gears
Re: HP estimate - needed for car classification

Originally Posted by Kevin Vandevenne
Hi guys, I know these threads aren't popular, but I'm trying to submit info on my car to a local car club so I can get my car into the proper class for some Time Attack racing this year. Part of the classification is to estimate the hp/TQ of your car if its been modded. I've put down 330hp/400ft/lbs (at wheels) as an estimate as I've never dynoed the car, and I'm just basing it off what I have seen with other builds. Can you let me know if that is in the right ball park? Here are the mods

355
trick flow 23 heads
ported edelbrock lower intake
ported slp runners and matching plenum
LT4 Hot Cam
MSD ignition
10:1
SLP 1 3/4 headers, 3" exhaust
going through a 700R4.

I need to have it tuned this spring after i get the intake on, but is 330/400 a reasonible estimate for this motor? If not, what should i expect?

Thanks
We dyno this combo 6 years ago and it made 320-340whp @ 5200.
Reply
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