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LQ9 Power guess

 
Old 04-14-2018, 10:21 PM
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Default LQ9 Power guess

Since we like to guess power output. What do you guys think

6.0 Liter
Holley 950HP
Edelbrock Super Victor
NASCAR CNC Port 799
11 to 1 Comp
238/242 .635-620 110+3
1 7/8 headers
Turbo 400 trans
Circle D 3800 convertor
3.90 gears

Last edited by dmracing; 04-23-2018 at 11:17 PM.
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Old 04-15-2018, 08:30 AM
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Rwhp or fwhp?
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Old 04-15-2018, 12:25 PM
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Fwhp?
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Old 04-15-2018, 03:54 PM
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Just for giggles or you going to dyno it ?

I'm a guessing 525-ish

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Old 04-15-2018, 05:03 PM
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I am going to dyno it in the car for sure. I might engine dyno it too. I want to be over 500 wheel power

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Old 04-16-2018, 12:18 PM
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What trans? My last combo went 5.90s and it was a 6.2 only made 497 at rear wheels. But, that was a big loose converter.
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Old 04-16-2018, 01:04 PM
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400 trans, 3800 convertor, 3.90 gear
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Old 04-16-2018, 05:10 PM
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Originally Posted by fast89stang View Post
What trans? My last combo went 5.90s and it was a 6.2 only made 497 at rear wheels. But, that was a big loose converter.
I would be happy if it ran in the 9s in the quarter
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Old 04-24-2018, 08:31 PM
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Originally Posted by Doug G View Post
Just for giggles or you going to dyno it ?

I'm a guessing 525-ish
That rwhp. We make 450rwhp on pump gas with LS1’s with the air conditioning
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Old 04-25-2018, 04:34 AM
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Originally Posted by dmracing View Post
That rwhp. We make 450rwhp on pump gas with LS1’s with the air conditioning
Looking at the specs you posted, you have maybe .3 +/- more compression, close cam specs, your 3800 stall Vs my tight 5000, a 400 Vs my 350, 9" Vs my 12 bolt, and ported heads w/ a super Vic Vs. my stock heads w/ Vic Jr.

math shows me I'm ....

Your HP computed from your vehicle ET is 462.09 rear wheel HP and 513.43 flywheel HP.
Your HP computed from your vehicle MPH is 442.55 rear wheel HP and 491.72 flywheel HP.

So, it's just a guess...

Originally Posted by dmracing View Post
6.0 Liter
Holley 950HP
Edelbrock Super Victor
NASCAR CNC Port 799
11 to 1 Comp
238/242 .635-620 110+3
1 7/8 headers
Turbo 400 trans
Circle D 3800 convertor
3.90 gears

Last edited by Doug G; 04-25-2018 at 04:42 AM.
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Old 04-25-2018, 05:44 AM
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I run an 8.8 rear. I do know the heads made 637 on pump gas on a LS2 with a smaller carb and cam
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Old 04-25-2018, 03:35 PM
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Get it done and dyno'd....no more guess
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Old 05-07-2018, 01:16 AM
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Old 05-07-2018, 01:28 PM
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Originally Posted by dmracing View Post
Fwhp?
Flywheel horse power

My guess is 550ish at fw and 450ish at rw. Really depends how good the heads and cam work together.
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Old 05-07-2018, 04:54 PM
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570 fwhp at 7100, 492 ft lbs at 5600
460 rwhp at same, 410 ft lbs at same.
Doug, what formula you using ? Ive seen where the estimated rw and fwhp are very close like you guessed, but in tbe real world, i think the old school drive trains we use are hp hogs ! Thats why i use a 2004r and an 8.5 10 bolt. A th400 sucks the life out of an engine, but it will live , lol.
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Old 05-07-2018, 05:52 PM
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Originally Posted by newschool72 View Post
570 fwhp at 7100, 492 ft lbs at 5600
460 rwhp at same, 410 ft lbs at same.
Doug, what formula you using ? Ive seen where the estimated rw and fwhp are very close like you guessed, but in tbe real world, i think the old school drive trains we use are hp hogs ! Thats why i use a 2004r and an 8.5 10 bolt. A th400 sucks the life out of an engine, but it will live , lol.
2 different calculators using my car's ET, weight, MPH are both less than 20hp different.

Looking at his build, I'm guessing it's close....Hope I'm wrong, but a dyno will tell.....as well as the track

You have an old school Moroso slide rule ?


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Old 05-07-2018, 09:00 PM
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I just rattle some nonsense off the top of my head thinking back too the thousands of threads ive studied and magazine builds ive read about, along with the always disappointing dyno runs ive done on my own junkers with stalled autos. They are always ego crushingly low compared to what my air dyno thinks they make at the flywheel. Like my 540 hp 406 ( with the parts it should be that easily ) that only made 356 rwhp, but according to the et/mph to rwhp predictors should have 450ish wheel . I also learned that just because the chassis dyno crushed your internet hero hopes doesnt mean it wont haul a$$ , lol.
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Old 05-07-2018, 10:04 PM
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Here’s a little 383 gen1 I put together. It made [email protected] and ran 10.70 on motor alone. With the cheater jetted for 225hp, we made 801and went 9.20s. Way back in 2000.



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Old 05-08-2018, 04:41 AM
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Originally Posted by dmracing View Post
Here’s a little 383 gen1 I put together. It made [email protected] and ran 10.70 on motor alone. With the cheater jetted for 225hp, we made 801and went 9.20s. Way back in 2000.
N/A....
Your HP computed from your vehicle ET is 522.73 rear wheel HP and 580.82 flywheel HP.(guessing the weight was 3600# )

So you can see it's close, but I guessed at the weight which is on me.
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Old 05-08-2018, 11:49 AM
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Try 11.30 at 120 with a weight of 3410.
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