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Old 11-17-2014, 02:40 PM   #1
Lethal Racing
 
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Lethal Racing ZL1 690rwhp - Idle & Dyno Clip

We just wanted to share this 2014 ZL1 M6 that we finished up in the shop last week. It came to us with just 1600miles.

We added:
LR-Custom Camshaft
LR-Dual 660 Spring kit w/Ti Retainers
Stainless Works Headers
Stainless Works Exhaust
Innovators West Balancer
Metco 2.5 Upper Pulley
KDI-Heat Exchanger
MGW Shifter
CAI Cold Air
Rotofab Big Gulp
Lingenfelter Reservoir
LR-Custom Dyno and Street Tuning

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Old 11-17-2014, 03:17 PM   #2
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Great gains!
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Old 11-17-2014, 03:31 PM   #3
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Can anyone tell me how some cars make more TQ than HP on these cars because most of the time it's the other way around?
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Old 11-17-2014, 03:39 PM   #4
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jeezus!
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Old 11-17-2014, 03:57 PM   #5
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Originally Posted by 10aSSee D View Post
Can anyone tell me how some cars make more TQ than HP on these cars because most of the time it's the other way around?
Mostly due to the camshaft profile. Sometimes it is due to the dyno variations. My car usually is slightly more torque vs hp with the stock cam. Some of the camshafts that peak at higher rpm usually show less peak torque.
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Old 11-17-2014, 04:09 PM   #6
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Mostly due to the camshaft profile. Sometimes it is due to the dyno variations. My car usually is slightly more torque vs hp with the stock cam. Some of the camshafts that peak at higher rpm usually show less peak torque.
Gotcha, thanks.
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Old 11-18-2014, 02:30 AM   #7
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My car usually is slightly more torque vs hp with the stock cam. Some of the camshafts that peak at higher rpm usually show less peak torque.
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Old 11-18-2014, 01:35 PM   #8
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Are you using the stock injectors?
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Old 11-18-2014, 05:43 PM   #9
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Are you using the stock injectors?
ID850's
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Old 11-18-2014, 11:00 PM   #10
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Originally Posted by Stephen12ZL1 View Post
Mostly due to the camshaft profile. Sometimes it is due to the dyno variations. My car usually is slightly more torque vs hp with the stock cam. Some of the camshafts that peak at higher rpm usually show less peak torque.

Yes. Exactly this. Larger cams with more duration can carry the torque out to a higher RPM. And you must understand the relationship between HP an TQ. TQ is the twisting force of the tires on the pavement. That's what propels your car. I.E. torque is angular force. Now HP is calculated from TQ.

HP=(TQ x RPM)/5250
From this you can see that because TQ is multiplied times RPM that the same amount of TQ at a higher RPM results in a lot more HP. Also the nature of this equation is why the HP and TQ curves always cross at 5250 RPM.

This is why a diesel engine that makes massive TQ at low rpm doesn't equate to much HP. Say a turbo diesel truck makes 700 ft-lb of torque at a low 2000 RPM.
(700 x 2000)/5250=260HP
Only 260 HP!

Now see in my car how a bigger cam with all other things constant (same boost etc.) makes way more TQ the faster you spin the engine. This results in some increase in peak TQ but a big increase in HP.
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Old 11-18-2014, 11:17 PM   #11
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Or check this out. A 1.6 liter turbo Formula1 engine can easily spin to 15000rpm. Look how much TQ but very high HP output.
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Old 11-19-2014, 09:24 AM   #12
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Nicely done.
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Old 11-19-2014, 07:56 PM   #13
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was this the retro chambered exhaust?
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Old 11-20-2014, 09:47 AM   #14
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was this the retro chambered exhaust?

Yes sir, Retro chambered exhaust
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