11.8 @ 122 mph

[Bolt-onC6]

Originally Posted by tpower

Just bought the wife a CTS V picking it up tuesday maybe I will road race that

There you go, now put that converter in your car and make it go. You want to select a converter with a true stall of about 500 rpm below peak torque for maximum performance.

[tpower]

road course last weekend , drag racing this weekend and my first AutoX next weekend

[RoketRdr]

Originally Posted by tpower

Problem is the convertor I still want to road race the car not sure how that will effect the car

This car was built for the road course even with the auto. GM hammered it for 24 hours straight on a road course to prove it so go race that sucker and have fun with the tap-shifting. A better aftermarket torque converter would certainly be a good decision though.

Originally Posted by Bolt-onC6

There you go, now put that converter in your car and make it go. You want to select a converter with a true stall of about 500 rpm below peak torque for maximum performance.

Yeah...and that makes for one very annoying daily driver and pisses off everyone around you leaving a stop light.

[Camarowguy]

Originally Posted by Supercharged SS

My car trapped 113 with 368 rwhp and 124.83 with 545rwhp. So roughly 177 rwhp to gain 12 mph. It's pretty much how it goes. It took another 160 rwhp to get another 11 mph.

So basically it would take about 140-145rwhp For me to trap 10mph higher right? So why is it taking the op about 100 more rwhp to do it. That's my whole point. Doesn't add up. Dyno must be off or the shop who did his work fluked the #'s.
122mph trap speed isn't slow by any means, just taking 600rwhp isn't right. Maybe he had three adult passengers when he made that pass? That would make sense then.

[tpower]

car is like 4400lbs with my fat ass in it , so to 60' better I need to lose weight

[hognutz]

Originally Posted by tpower

My best time today , it was really hot today. made about 10 passes

11.8 / 1.80 60' / 122mph

was this time on stock tire?

[Supercharged SS]

Originally Posted by Camarowguy

So basically it would take about 140-145rwhp For me to trap 10mph higher right? So why is it taking the op about 100 more rwhp to do it. That's my whole point. Doesn't add up. Dyno must be off or the shop who did his work fluked the #'s.
122mph trap speed isn't slow by any means, just taking 600rwhp isn't right. Maybe he had three adult passengers when he made that pass? That would make sense then.

Yeah, you're right. I just wanted to state what my car does. At just over 600 I was up around 128. I think, I don't remember but that seems right. You can trap 122 with 500 rwhp.

[Camarowguy]

Originally Posted by Bolt-onC6

There you go, now put that converter in your car and make it go. You want to select a converter with a true stall of about 500 rpm below peak torque for maximum performance.

So.....about a 5000 stall?

[tpower]

I used nittos nt 05r and they are very very used when I got them

[Camarowguy]

Originally Posted by Supercharged SS

Yeah, you're right. I just wanted to state what my car does. At just over 600 I was up around 128. I think, I don't remember but that seems right. You can trap 122 with 500 rwhp.

Well he just posted that with him in the car it weighs 4400lbs. Mine weighed 4060lbs with me in it. So now I'm seeing why. If his weighed what mine does it would have trapped roughly 125-126....so now we are getting somewhere. Still a little off but not so much now.

[RoketRdr]

Originally Posted by Camarowguy

So basically it would take about 140-145rwhp For me to trap 10mph higher right? So why is it taking the op about 100 more rwhp to do it. That's my whole point. Doesn't add up. Dyno must be off or the shop who did his work fluked the #'s.
122mph trap speed isn't slow by any means, just taking 600rwhp isn't right. Maybe he had three adult passengers when he made that pass? That would make sense then.

Originally Posted by tpower

car is like 4400lbs with my fat ass in it , so to 60' better I need to lose weight

This is the reason. The higher the speed the more the power requirement exponentially grows to overcome the weight. The ZL1 isn't trapping too bad compared to cars that are much lighter. Its a testament to how well the 1900 is working. Go use any online hp calculator and start playing with the numbers and you'll see that the faster you want to go the far greater power requirement. You will actually reach a point where it will take an additional 100hp just to gain a few mph. Trapping 122mph in a 4400lb car at 600rwhp calculates out to be correct.

[Camarowguy]

Originally Posted by RoketRdr

This is the reason. The higher the speed the more the power requirement exponentially grows to overcome the weight. The ZL1 isn't trapping too bad compared to cars that are much lighter. Its a testament to how well the 1900 is working. Go use any online hp calculator and start playing with the numbers and you'll see that the faster you want to go the far greater power requirement. You will actually reach a point where it will take an additional 100hp just to gain a few mph. Trapping 122mph in a 4400lb car at 600rwhp calculates out to be correct.

I've never used an online "calculator" that was correct. What would you say my car makes rwhp wise?

[tpower]

I have not scaled the car yet but I guessing 4120 for the car and then me 4400lbs

[RoketRdr]

Originally Posted by Camarowguy

I've never used an online "calculator" that was correct. What would you say my car makes rwhp wise?

They will get you "close" according to mechanics. They're just like a dyno...a tool to help get a baseline or an "idea" of where you should be. They of course can't take into consideration for aerodynamics and drive train losses but the math for mechanics is what it is and that is a known constant. The calcs I ran showed that he needed to be making 615hp for those times so it was fairly close.